EP2495369B1 - Snowplough blade - Google Patents

Snowplough blade Download PDF

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Publication number
EP2495369B1
EP2495369B1 EP12157053.5A EP12157053A EP2495369B1 EP 2495369 B1 EP2495369 B1 EP 2495369B1 EP 12157053 A EP12157053 A EP 12157053A EP 2495369 B1 EP2495369 B1 EP 2495369B1
Authority
EP
European Patent Office
Prior art keywords
blade
snowplough
wing
section
slide
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.)
Active
Application number
EP12157053.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2495369A3 (en
EP2495369A2 (en
Inventor
Petteri Tervamäki
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.)
Arctic Machine Oy
Original Assignee
Arctic Machine Oy
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 Arctic Machine Oy filed Critical Arctic Machine Oy
Publication of EP2495369A2 publication Critical patent/EP2495369A2/en
Publication of EP2495369A3 publication Critical patent/EP2495369A3/en
Application granted granted Critical
Publication of EP2495369B1 publication Critical patent/EP2495369B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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

Definitions

  • the invention relates to a snowplough blade, which is elastically fastened to the lower section of the plough wing.
  • the main operation of a snowplough is removing snow from a surface being ploughed. Furthermore, the snowplough can be used for removing slush or even water before it freezes, which has a great effect in preventing slipperiness before freezing. All removed moisture directly decreases the amount of ice to be formed on the ploughed surface and the requirement of de-icing chemicals and assists in keeping the surface unfrozen.
  • the snowplough blade When ploughing by the snowplough, the snowplough blade should follow the surface being ploughed as precisely as possible even in the irregularities of the surface if aiming at a good cleaning result. Challenges in following the surface increase even more along with the increase in the work widths of the snowplough. Another important requirement is the tightness of the snowplough blade, which is yet emphasised when trying to remove also water from the area being ploughed.
  • a second common arrangement is to manufacture the snowplough of relatively short, separate elements of the width of 0.8-1.0 m moving in the vertical direction, where the elastic blade connects as an extension of the wing section by a bolt connection.
  • Each element follows the highest point of the ground as the elasticity of the blade follows in a limited way.
  • the shape of the wing is limited to quite large circular arches because, otherwise, gradation is created on the wing from the mutual moving of the elements. It is not possible to realise the shape of the wing most advantageous for dry frost snow with a smaller radius of curvature.
  • a problem of the element-structured snowplough is leaks from between the elements. Element-structured snowploughs are heavy and this problem is particularly emphasised as the work width of snowploughs increases. The large mass of the moving elements together with a quite high running speed induce large loads applied to the blades when hitting obstacles.
  • a third common and known elastic blade arrangement of a snowplough is to divide the snowplough blade to elements of the length of 0.8-2.0 m which are elastically suspended as the extensions of a uniform snowplough wing or a divided one in a folding-wing snowplough.
  • the blade element is also able to tilt, whereby the surface following ability is better than that of element snowploughs at least with the same blade lengths. Disadvantages are leaks from between the blade elements and connecting the moving blade to the fixed wing without leaks.
  • WO 91/15637 discloses a wear strip for use on material handling equipment, such as plough blades, comprising an elongate body of metal and wear resistant tiles bonded to the body and spaced along at least one face with gaps between the tiles to enable bending the strip to suit the curvature of the plough blade.
  • JP 2001 248127 discloses a cutting edge with increased abrasion resistance in the snow removing edge comprising a hard member dispersed with hard grains at a high filling density and integrally bound with a metal having a melting point lower than that of the hard grains, and a protective member having shock resistance and covering at least the blade advancing direction side of the hard material at the tip part of an edge body.
  • WO 2004/031490 discloses a blade holder comprising a beam with a first fixing element adapted to be fixed to the lower edge of a snow-clearing device; a second fixing element adapted to engage the rear side of the blade, the blade holder allowing the blade to have a given cutting angle and to be folded backwards when running into an obstacle to prevent damage.
  • An object of the invention is to introduce a snowplough blade, which eliminates disadvantages related to prior-art blades.
  • a particular object of the invention is to introduce a snowplough blade, which follows well the irregularities of a surface being ploughed, and removes effectively snow, slush and water.
  • an object of the invention is to introduce a snowplough blade having a tight construction, which also enables the ploughing of water.
  • the object of the invention is achieved with a snowplough blade and a snowplough comprising a snowplough blade, which are characterised by what is presented in the independent claim. Some preferred embodiments are disclosed in the dependent claims.
  • the snowplough blade is of one construction without gaps between the blade elements: the blade is provided with elastic sections chamfered of the rear surface, between which, there are more rigid, controlled and sprung blade elements.
  • the blade is as long as possible thus minimising the number of blade connections as possible leaks points.
  • the elastic sections connect the blade elements jointlessly without leaks, and the elastic section operates as a blade like the blade elements. Furthermore, a wiper section is arranged to slide along with the movements of the blade on the surface of the lower section of the plough wing. Such a construction is elastic, it follows the irregularities of the surface, but is tight.
  • the blade is manufactured of one or more long sections. There still are elastic sections between them or they include elastic sections.
  • the elastic sections are provided at regular intervals. At the elastic sections, the blade bends more easily and yields also in the longitudinal direction more easily.
  • the elastic sections enable delivering the blade as rolled up, thus facilitating the transport.
  • the elements between the elastic sections are controlled as sprung from the middle to their working position.
  • the controlled support prevents the cutting angle of the blade from changing during ploughing, but allows the blade to move in accordance with the shapes of surfaces being ploughed.
  • a curved wiper section as the extension of the snowplough blade.
  • the wiper section can be a separate section, which is fastened to the blade, or it is part of an expendable blade, which is tensioned against the wing and arranged to slide along with the movements of the blade on the surface of the lower section of the wing.
  • the wiper section tensioned as curved operates as a small ramp when the material being ploughed slides over it, whereby the wiper presses more heavily against the plough wing as the material flow increases. As the force increases, the tightness of the connection improves.
  • the wiper section makes the inner surfaces of the plough, on which the material slides, extremely tight and leakfree.
  • a straight wiper section as the extension of the snowplough blade.
  • the wiper section can be a separate section which is fastened to the blade or it is part of an expendable blade, which has been pretensioned straight to its use position against the wing and arranged to slide along with the movements of the blade on the surface of the lower section of the wing.
  • the wiper section tensioned straight enables the smooth slide of snow from the blade to the plough wing such that the material being ploughed maintains its sliding contact to the snowplough as well as possible. With the long sliding contact of snow, the material being ploughed obtains a rotary motion within the plough.
  • the wiper section makes the inner surfaces of the plough, on which the material slides, extremely tight and leakfree.
  • the blade element is controlled to move parallel with the tangent of the lower edge of the cylindrical wing. As the blade moves against irregularities, the sprung wiper section of the blade is tightly on the wing surface against it preventing the access of water or snow behind the blade. The outward motion of the blade element is limited and the extension is dimensioned considering the required normal elastic travel and keeping the wiper on top of the wing in all situations.
  • the construction allows a simple blade replacement without extra work compared with the normal blade replacement.
  • Fig. 1 shows a rear view of a snowplough blade 6 fastened to a snowplough wing 7.
  • the blade includes chamfers i.e. elastic sections 9 at regular intervals on its rear surface. They increase the elasticity of the blade and it's setting on the irregular ground.
  • the blade elements include fastening holes 11 for its fastening.
  • Fig. 2 shows the blade at a larger scale and the chamfered elastic sections 9 of the fastening elements.
  • the front surface of the wing is the same as with the blade.
  • the elastic section operates as a blade in the same way as the other blade elements.
  • Fig. 3 shows a cross section of the blade 6 in its working position.
  • the lower surface of the blade is parallel with the ground.
  • an elastic wiper section 10 the top section of which is tensioned against the wing 7 and arranged to slide along with the movements of the blade on the surface of the lower section of the wing.
  • Fig. 4 shows a side view of the blade and its suspension to the wing.
  • the snowplough blade 6 is fastened to blade holders 4.
  • a slide 1 To the blade holder is fastened a support construction 8, which includes a slide guide 2, which is parallel with the tangent of the lower edge of the wing.
  • the slide 1 fastened to the blade holder is located to the slide guide and it slides in the slide guide 2 parallel with the tangent of the lower edge of the wing.
  • a spring section 3 is between the blade holder and the support construction 8 and it is arranged to press the blade holder 4 downwards.
  • Above the slide guide there is a limiter 5, which is arranged to stop the movement of the slide downwards. The limiter 5 enables the pretensioning of the spring section 3 in the rest position.
  • the blade holders are shorter than the distance between the elastic sections.
  • Each blade holder includes two slide guides with their springs. The slides are loose in the lateral direction allowing tilting and small longitudinal movements of the blade. The location of the blade element in relation to the wing plate 7 pretensions the top edge of the wiper section 10 against the wing plate.
  • the construction shown in the figures illustrates one implementation alternative.
  • the characteristic features of the invention are the continuous blade construction without leaking gaps between the blade sections and the pretensioned wiper extension of the moving blade connected to the stationary wing section against the wing plate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cleaning Of Streets, Tracks, Or Beaches (AREA)
EP12157053.5A 2011-03-04 2012-02-27 Snowplough blade Active EP2495369B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20115221A FI124170B (fi) 2011-03-04 2011-03-04 Lumiauran terä

Publications (3)

Publication Number Publication Date
EP2495369A2 EP2495369A2 (en) 2012-09-05
EP2495369A3 EP2495369A3 (en) 2017-05-03
EP2495369B1 true EP2495369B1 (en) 2019-11-27

Family

ID=43806433

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12157053.5A Active EP2495369B1 (en) 2011-03-04 2012-02-27 Snowplough blade

Country Status (2)

Country Link
EP (1) EP2495369B1 (fi)
FI (1) FI124170B (fi)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2290060A (en) * 1941-08-15 1942-07-14 Clarence O Massey Scraper
GB9007831D0 (en) * 1990-04-06 1990-06-06 Milard Hard Metals Ltd Wear strips
DE29704896U1 (de) * 1997-03-18 1997-05-07 Maier, Walter, 84478 Waldkraiburg Schürfleiste für Schneeräumfahrzeuge
JP2001248127A (ja) * 1999-12-27 2001-09-14 Komatsu Ltd カッティングエッジ
SE523516C2 (sv) * 2002-10-03 2004-04-27 Goesta Kaellqvist Skärhållare för snöröjningsredskap

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2495369A3 (en) 2017-05-03
FI20115221A (fi) 2012-09-05
FI124170B (fi) 2014-04-15
EP2495369A2 (en) 2012-09-05
FI20115221L (fi) 2012-09-05
FI20115221A0 (fi) 2011-03-04

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