WO2006040397A1 - A blade for a snow plough - Google Patents

A blade for a snow plough Download PDF

Info

Publication number
WO2006040397A1
WO2006040397A1 PCT/FI2005/000435 FI2005000435W WO2006040397A1 WO 2006040397 A1 WO2006040397 A1 WO 2006040397A1 FI 2005000435 W FI2005000435 W FI 2005000435W WO 2006040397 A1 WO2006040397 A1 WO 2006040397A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
snow
upper beam
edge
curvature
Prior art date
Application number
PCT/FI2005/000435
Other languages
French (fr)
Inventor
Mauno Ruuska
Original Assignee
Patria Vammas 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 Patria Vammas Oy filed Critical Patria Vammas Oy
Priority to AT05800581T priority Critical patent/ATE456706T1/en
Priority to US11/576,976 priority patent/US7596892B2/en
Priority to EP05800581A priority patent/EP1805372B1/en
Priority to CA2584047A priority patent/CA2584047C/en
Priority to DE602005019187T priority patent/DE602005019187D1/en
Publication of WO2006040397A1 publication Critical patent/WO2006040397A1/en
Priority to NO20072428A priority patent/NO20072428L/en

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
    • E01H5/065—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

Definitions

  • the invention relates to a blade intended to work in the curved form of a snow plough, and the blade is from its lower edge fixed to a rigid beam and the upper edge of which is supported by the upper beam or similar and the said blade is of flexible material, as plastic sheeting.
  • the blade portion of the snow plough shifts snow lifted on to it by the plough colter, from the area to be ploughed to the side of the snow plough.
  • the aim is to shift snow effectively by means of mall ploughing force, a clean mark of job without snow getting over the blade and control of the formation of the plough bank.
  • the flow of snow on the blade depends on the ploughing speed. By lower speeds the snow moves on the blade lower edge and along it not rising on the blade. It happens especially by small ploughing quantities of snow. By growing speed the snow rises onto the blade and falls down, while the course of snow is screw like. By most speedy ploughing the snow rises only once onto the blade and continues then thrown in the blade direction.
  • the most reasonable and most aimed form of blade is a cone broadening in the trailing direction. Then the blade shifts the snow a longer way only by one rise, while the quantity of snow grows. By sufficient speed for throwing snow the most reasonable direction diagonally upwards can be achieved.
  • the shallowness of the forepart of the blade is an advantage by speedy ploughing, since the turbulence arising at the back of blade remains smaller.
  • Slight friction between snow and blade facilitates the sliding of snow motion on the blade without snow gathering to get pushed in front of the blade into a heap to be mixed.
  • the snow sliding on the blade begins to move to the sides and the width of the snow plough can be used with minimum overlap in regard to former ploughing width.
  • Another known solution is a conical blade with knives in upper and lower edges and the whole cone is turned around an axle in direction of the longitudinal axle of the plough vehicle for achieving the ploughing direction wanted.
  • the disadvantage of this solution is the great lifting height, especially with greater ploughs and double colter constructions.
  • a known solution is to use a flexible blade attached from its lower and its upper edge to rigid beams and the upper beam is moved in regard to the lower beam by means of levers and hydraulic cylinders so that it is possible to make the blade broaden into a cone in wanted direction.
  • the disadvantage here is complicated mechanical constructions and need for control according to the direction of work.
  • the flexible form of the snow plough changes automatically from cylindrical into a broadening cone, when the load of snow grows on the blade.
  • the snow plough according to this invention is characterized in that the blade is from its upper beam, essentially from its middle, supported by suspension means, which due to the ploughing load allows the upper beam and blade upper edge to tilt and the blade to change the radius of curvature at least at the suspension on the blade area towards the blade point.
  • the flexible attachment of the upper beam of this invention it is possible to get the upper beam motion automatically in the right direction.
  • the upper beam that supports the blade is attached flexibly in regard to the lower beam.
  • the direction of motion is determined by the direction flexible motion and the size by the stiffness of spring and the snow load getting to the blade.
  • the advantage of the solution is the low cylindrical form of blade lifted up by transportation, whereby its visual obstruction is small compared to high form.
  • By fast ploughing the conical form of the blade is of no benefit and the blade remains low. There is less turbulence at the back of the blade than with a high blade.
  • the blade lifting force is a disturbing property, since at its worse, it tends to lift up the whole plough, whereby the cutting force weakens and at the same time the snow- removing property of the plough weakens.
  • the blade opening into a broadening cone reduces the plough colter forces with no need for separate colter force control.
  • the broadening blade cone reduces the rises of snow onto the blade by ploughings with average speeds and thus the quantity of ploughing capacity needed. With same plough capacity greater snow quantities as with a cylindrical blade can be shifted.
  • Figure 1 shows the snow plough viewed from its end.
  • Figure 2 shows the snow plough viewed from its front.
  • FIG. 1 shows snow plough 3 furnished with body 5, support wheel 6 furnished height adjusting means and colter 1 furnished with a blade 3 as its extension.
  • Blade 3 is of flexible material and supported by means of holder 8.
  • the blade lower edge is fixed to square formed beam 2 by means of winding band 4.
  • Lower beam 2 does wind, so thus the lower edge of blade 5 is stiff.
  • the upper edge of the flexible blade is with brackets llattached to rigid beam 12, which can wind in regard to round balk 12. This construction enables change of blade form from cylinder to broadening cone.
  • brackets 11 in upper beam 12 and also pieces 4 in the lower edge allow sliding of blade on body beams 2 and differences of thermal extensions.
  • Upper beam 12 is suspended on one leaf spring 8. If upper beam 12 is suspended on two leaf springs 8, so in its normal position, without forces caused by the snow, leaf springs 8 will most reliably keep upper balk 12 in lower beam 2 direction.
  • leaf springs 8 will most reliably keep upper balk 12 in lower beam 2 direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cleaning Of Streets, Tracks, Or Beaches (AREA)
  • Soil Working Implements (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Abstract

A blade (3) meant to work in the curved form of a snow plough and attached from its lower edge to a rigid beam, the upper edge of which is supported by means of upper beam (12) or similar, and said blade is of flexible material, as plastic sheet. The blade is from its upper beam (12), essentially from its middle, supported by suspension means (9), which due to the ploughing load allows upper beam (12) and blade (3) upper edge to tilt and blade (3) to change the radius of curvature at least from the suspension spot on the blade area toward the blade point .

Description

A BLADE FOR A SNOW PLOUGH
The invention relates to a blade intended to work in the curved form of a snow plough, and the blade is from its lower edge fixed to a rigid beam and the upper edge of which is supported by the upper beam or similar and the said blade is of flexible material, as plastic sheeting. The blade portion of the snow plough shifts snow lifted on to it by the plough colter, from the area to be ploughed to the side of the snow plough. The aim is to shift snow effectively by means of mall ploughing force, a clean mark of job without snow getting over the blade and control of the formation of the plough bank.
The flow of snow on the blade depends on the ploughing speed. By lower speeds the snow moves on the blade lower edge and along it not rising on the blade. It happens especially by small ploughing quantities of snow. By growing speed the snow rises onto the blade and falls down, while the course of snow is screw like. By most speedy ploughing the snow rises only once onto the blade and continues then thrown in the blade direction.
The temperature and water content of snow and the quantities to be ploughed do change. This makes quite different demands on the form and size of the snow plough blade The friction between blade and snow with its variations is an influential factor, of ploughing.
Light and dry frozen snow and smaller snow quantities are best ploughed with a relatively low blade turning down from the front. It is important to prevent light snow to get over the blade and to minimize turbulence at the back of the blade.
When snow quantity, specific weight the of snow quantity, water quantity and temperature of snow rise the firmness and ploughing resistance of snow increase. Then a higher blade with bigger bending radius, most preferably broadening conically, ploughs most effectively.
For moving snow by faster ploughings the most reasonable and most aimed form of blade is a cone broadening in the trailing direction. Then the blade shifts the snow a longer way only by one rise, while the quantity of snow grows. By sufficient speed for throwing snow the most reasonable direction diagonally upwards can be achieved. On the other hand, the shallowness of the forepart of the blade is an advantage by speedy ploughing, since the turbulence arising at the back of blade remains smaller.
Slight friction between snow and blade facilitates the sliding of snow motion on the blade without snow gathering to get pushed in front of the blade into a heap to be mixed. The snow sliding on the blade begins to move to the sides and the width of the snow plough can be used with minimum overlap in regard to former ploughing width.
Same snow ploughs are used for ploughing on the right and on the left side and then conicality is needed in both directions. A known solution is achieved making in both ends of the cylindrical blade portion growing cylindrical blade extensions. There will be discontinuities in he blade, the blade forepart looses a part of its optimal form and it is high with its turbulence at the back.
Another known solution is a conical blade with knives in upper and lower edges and the whole cone is turned around an axle in direction of the longitudinal axle of the plough vehicle for achieving the ploughing direction wanted. The disadvantage of this solution is the great lifting height, especially with greater ploughs and double colter constructions.
Further, a known solution is to use a flexible blade attached from its lower and its upper edge to rigid beams and the upper beam is moved in regard to the lower beam by means of levers and hydraulic cylinders so that it is possible to make the blade broaden into a cone in wanted direction. The disadvantage here is complicated mechanical constructions and need for control according to the direction of work.
According to the solution of this invention the flexible form of the snow plough changes automatically from cylindrical into a broadening cone, when the load of snow grows on the blade. The snow plough according to this invention is characterized in that the blade is from its upper beam, essentially from its middle, supported by suspension means, which due to the ploughing load allows the upper beam and blade upper edge to tilt and the blade to change the radius of curvature at least at the suspension on the blade area towards the blade point. According to the flexible attachment of the upper beam of this invention it is possible to get the upper beam motion automatically in the right direction. The upper beam that supports the blade is attached flexibly in regard to the lower beam. The direction of motion is determined by the direction flexible motion and the size by the stiffness of spring and the snow load getting to the blade. By higher driving speeds and greater snow quantities centrifugal force is directed on the blade, which force tends to lift the blade from its upper edge. The blade gets up especially in the trailing end of the plough blade, because of the impact of its greater snow quantity.
The advantage of the solution is the low cylindrical form of blade lifted up by transportation, whereby its visual obstruction is small compared to high form. By fast ploughing the conical form of the blade is of no benefit and the blade remains low. There is less turbulence at the back of the blade than with a high blade. By ploughing there is most snow in the blade trailing end and due to it the buoyancy caused by the snow whirl is at greatest in it causing most buoyancy forces, which open the blade into a growing cone. At the same time this produces the right direction of conicality.
Anyhow, the blade lifting force is a disturbing property, since at its worse, it tends to lift up the whole plough, whereby the cutting force weakens and at the same time the snow- removing property of the plough weakens. The blade opening into a broadening cone reduces the plough colter forces with no need for separate colter force control. The broadening blade cone reduces the rises of snow onto the blade by ploughings with average speeds and thus the quantity of ploughing capacity needed. With same plough capacity greater snow quantities as with a cylindrical blade can be shifted.
In the following the invention is disclosed with reference to the enclosed drawing where Figure 1 shows the snow plough viewed from its end. Figure 2 shows the snow plough viewed from its front.
Figure 1 shows snow plough 3 furnished with body 5, support wheel 6 furnished height adjusting means and colter 1 furnished with a blade 3 as its extension. Blade 3 is of flexible material and supported by means of holder 8. The blade lower edge is fixed to square formed beam 2 by means of winding band 4. Lower beam 2 does wind, so thus the lower edge of blade 5 is stiff. The upper edge of the flexible blade is with brackets llattached to rigid beam 12, which can wind in regard to round balk 12. This construction enables change of blade form from cylinder to broadening cone.
When according to figure 2 the blade is locked lengthwise only from the middle, brackets 11 in upper beam 12 and also pieces 4 in the lower edge allow sliding of blade on body beams 2 and differences of thermal extensions. Upper beam 12 is suspended on one leaf spring 8. If upper beam 12 is suspended on two leaf springs 8, so in its normal position, without forces caused by the snow, leaf springs 8 will most reliably keep upper balk 12 in lower beam 2 direction. By ploughing the snow load tilts upper beam to position 12' and at the same time the curvature of blade 3 changes. The curvature becomes more gently sloping from the suspension spot toward the blade trailing edge and becomes steeper from the suspension spot toward the blade front edge. The plastic or for instance rubber material of the blade allows bending and winding of a plate structured blade.
Due to the centrifugal force caused by the sliding snow flow on the blade more lifting forces are directed on the blade left portion and the blade back part gets up and backward, while the front part gets down and forward. The blade becomes a cone broadening in the trailing direction.

Claims

1. A blade (3) meant to work in the curved form of a snow plough and fixed from its lower edge to rigid beam (2), the upper edge of which is supported by means of upper beam (12) or similar, and said blade is of flexible material, as plastic sheet, char- acterizedin that the blade is from its upper beam (12), essentially from its middle, supported by suspension means (9), which due to the ploughing load allows upper beam (12) and blade (3) upper edge to tilt and blade (3) to change the radius of curvature at least from the suspension spot on the blade area toward the blade point .
2. A blade according to claim 1, characterized in that the blade portion of blade (3), which changes its curvature, is attached at least to the blade upper part.
3. A blade according to claim 1, characterized in that the blade upper edge is attached windingly to upper beam (12) and upper beam (12 is suspended on spring (8), while, the spring allows change of blade curvature also in the suspension spot.
4. A blade according to claim 1, characterized in that upper beam (12) is suspended from the middle or near the middle with two leaf springs (8), which allow rise and tilting of upper beam (12) for change of blade (3) into a broadening cone due to the load of the snow flow essentially at the most in blade (3) trailing end.
5. A blade according to claim 1, characterized in that blade (3) is by means of brackets (4) connected to it attached from its lower edge non windingly and from its upper edge windingly on rigid beams (2), (12), while the attachments are arranged to allow changes of length due to material differences in the blade lengthwise direction.
PCT/FI2005/000435 2004-10-11 2005-10-11 A blade for a snow plough WO2006040397A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT05800581T ATE456706T1 (en) 2004-10-11 2005-10-11 SNOW PLOW
US11/576,976 US7596892B2 (en) 2004-10-11 2005-10-11 Blade for a snow plough
EP05800581A EP1805372B1 (en) 2004-10-11 2005-10-11 Snow plough
CA2584047A CA2584047C (en) 2004-10-11 2005-10-11 A blade for a snow plough
DE602005019187T DE602005019187D1 (en) 2004-10-11 2005-10-11 snow plow
NO20072428A NO20072428L (en) 2004-10-11 2007-05-11 Sheet for a snooplog

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20041313A FI116800B (en) 2004-10-11 2004-10-11 Wing for a snow plow
FI20041313 2004-11-10

Publications (1)

Publication Number Publication Date
WO2006040397A1 true WO2006040397A1 (en) 2006-04-20

Family

ID=33306014

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2005/000435 WO2006040397A1 (en) 2004-10-11 2005-10-11 A blade for a snow plough

Country Status (8)

Country Link
US (1) US7596892B2 (en)
EP (1) EP1805372B1 (en)
AT (1) ATE456706T1 (en)
CA (1) CA2584047C (en)
DE (1) DE602005019187D1 (en)
FI (1) FI116800B (en)
NO (1) NO20072428L (en)
WO (1) WO2006040397A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3546653A1 (en) 2018-03-27 2019-10-02 Euro Investissement Snow-removal blade with variable working height

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI117296B (en) * 2004-10-11 2006-08-31 Patria Vammas Oy Suspension of a snow plow cutting element
US9869067B2 (en) * 2014-11-13 2018-01-16 Douglas Dynamics, L.L.C. Snow plow and mount assembly

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5025577A (en) * 1989-08-03 1991-06-25 Frink America, Inc. Adjustable one-way trip edge snow plow
US5079866A (en) * 1990-04-23 1992-01-14 Cives Corporation Plow assembly with flexible moldboard
US5477600A (en) 1993-10-25 1995-12-26 Tenco Machinery Ltd. Snow plow with deformable moldboard

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3650054A (en) * 1969-12-11 1972-03-21 Meyer Products Inc Tripping mechanism for a plow blade
US4019587A (en) * 1976-05-17 1977-04-26 Caterpillar Tractor Co. Work vehicle having variable curvature blade assembly
US4385458A (en) * 1981-08-26 1983-05-31 Flink Company Resilient deflector for snowplows
DE3790923C2 (en) * 1987-03-31 1994-04-28 Agency Ind Science Techn Vehicle snowplough attachment
US4837951A (en) * 1988-09-23 1989-06-13 Frink America, Inc. Reversible moldboard assembly
US5048207A (en) * 1990-03-13 1991-09-17 Frink America, Inc. Adjustable discharge wing plow
US5638617A (en) * 1996-01-30 1997-06-17 Her Majesty The Queen In Right Of Canada, As Represented By The Ministry Of Transport Of The Government Of Quebec Snowplow equipment for road vehicle
US6073371A (en) * 1997-12-22 2000-06-13 Henderson Manufacturing Company Snowplow assembly with adjustable-bias trip mechanism
US6134813A (en) * 1998-12-18 2000-10-24 The Louis Berkman Company Plastic moldboard plow
US6435580B1 (en) * 2001-03-29 2002-08-20 Willie Lock Hand-held shovel
US6941685B2 (en) * 2002-10-29 2005-09-13 Douglas Dynamics, L.L.C. Snowplow assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5025577A (en) * 1989-08-03 1991-06-25 Frink America, Inc. Adjustable one-way trip edge snow plow
US5079866A (en) * 1990-04-23 1992-01-14 Cives Corporation Plow assembly with flexible moldboard
US5477600A (en) 1993-10-25 1995-12-26 Tenco Machinery Ltd. Snow plow with deformable moldboard

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3546653A1 (en) 2018-03-27 2019-10-02 Euro Investissement Snow-removal blade with variable working height
FR3079536A1 (en) * 2018-03-27 2019-10-04 Euro Investissement SNOW BLADE WITH VARIABLE WORKING HEIGHT

Also Published As

Publication number Publication date
US7596892B2 (en) 2009-10-06
FI20041313A0 (en) 2004-10-11
NO20072428L (en) 2007-07-11
CA2584047C (en) 2013-12-17
EP1805372B1 (en) 2010-01-27
FI116800B (en) 2006-02-28
EP1805372A1 (en) 2007-07-11
DE602005019187D1 (en) 2010-03-18
CA2584047A1 (en) 2006-04-20
ATE456706T1 (en) 2010-02-15
US20080163522A1 (en) 2008-07-10

Similar Documents

Publication Publication Date Title
CA2584047C (en) A blade for a snow plough
US5048207A (en) Adjustable discharge wing plow
EP0326368A2 (en) Mine clearing apparatus
US4984638A (en) Plow with symmetrical bodies having concave vertical and horizontal cross-sections
US7730641B2 (en) Blade element mounting in a snow plough
US11913191B2 (en) Floating earth levelling blade assembly with shoes
US4241567A (en) Lawn mower safety shield
NL8402106A (en) PLOW.
CA2611548C (en) Piste grooming apparatus for a motor vehicle
CA3093688A1 (en) Earth moving implement with adjustable configuration earth moving blades
US4930582A (en) Road grader attachment
US4325826A (en) Oil sweeper method and apparatus
US4385458A (en) Resilient deflector for snowplows
EP3390728B1 (en) Apparatus for making a cross-country ski run
US20030154633A1 (en) Snow groomer with a variable snowchamber tiller assembly
WO2016056312A1 (en) Skid apparatus for rotary tiller
CA2809170C (en) Snowmobile steering ski
US1891046A (en) Snowplow
FI74090C (en) SNOEPLOG.
SU1102865A1 (en) Working member of trenchless drain-tube layer
DK141941B (en) Snowplow.
SE469009B (en) TREAD PICKERS SUPPLIED WITH ORGAN FOR MARKET PREPARATION
SE538163C2 (en) scraping device
US1394548A (en) Road-drag
NL2014794A (en) Shaving board for use in trawl fisheries and their implementation.

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KR KZ LC LK LR LS LT LU LV LY MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2584047

Country of ref document: CA

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2005800581

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 2005800581

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 11576976

Country of ref document: US