EP1830004A2 - Tragevorrichtung für ein Schneeräumschild - Google Patents

Tragevorrichtung für ein Schneeräumschild Download PDF

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Publication number
EP1830004A2
EP1830004A2 EP07102291A EP07102291A EP1830004A2 EP 1830004 A2 EP1830004 A2 EP 1830004A2 EP 07102291 A EP07102291 A EP 07102291A EP 07102291 A EP07102291 A EP 07102291A EP 1830004 A2 EP1830004 A2 EP 1830004A2
Authority
EP
European Patent Office
Prior art keywords
cylinder
blade
valve
reservoir
support means
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.)
Withdrawn
Application number
EP07102291A
Other languages
English (en)
French (fr)
Other versions
EP1830004A3 (de
Inventor
Walter Divisi
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.)
Dropsa SpA
Original Assignee
Sunbird Investments Ltd
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 Sunbird Investments Ltd filed Critical Sunbird Investments Ltd
Publication of EP1830004A2 publication Critical patent/EP1830004A2/de
Publication of EP1830004A3 publication Critical patent/EP1830004A3/de
Withdrawn legal-status Critical Current

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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

Definitions

  • the present invention relates to a support device for a snowplough blade.
  • Snowplough blades are currently mounted on and manipulated by suitable vehicles provided with support devices which are very heavy and bulky.
  • a blade support system typically presents a plurality of hydraulic cylinders for supporting and swivelling the blade and a plurality of valves and control and safety systems connected together, which make the device extremely heavy and bulky.
  • the technical aim of the present invention is therefore to provide a support device for a snowplough blade which enables the stated technical drawbacks of the known art to be eliminated.
  • an object of the invention is to provide a device of small dimensions and weight such that it can also be mounted on a vehicle of generic type (i.e. not specifically designed therefore) without the risk of this overturning because of the weight.
  • Another object of the invention is to provide an economical device.
  • Figure 3 shows a "generic" motor vehicle (such as a SUV) on which a device of the invention is mounted to support a snowplough blade 3.
  • a “generic" motor vehicle such as a SUV
  • a device of the invention is mounted to support a snowplough blade 3.
  • the blade 3 is used to shift snow while the vehicle 2 is travelling; its position can be adjusted vertically (as indicated by the arrow F1) or horizontally (as indicated by the arrow F2).
  • the device 1 comprises a body 5 produced in one piece by casting; the body 5 defines a reservoir 6, pumping means 7 (consisting of a gear pump connected to a preferably electric motor powered by the vehicle battery) and support means 8 for the blade 3; the pumping means 7 are fed by the reservoir 6 and operate the blade support means 8.
  • the support means 8 comprise a first hydraulic cylinder for raising the blade; as shown in Figure 1 this first cylinder 8 is defined by the body 5 and within it there moves a piston rod 9 the end of which carries a through holed seat 10 for connection to the blade 3.
  • the first hydraulic cylinder 8 is single acting (only one of its chambers is fed by the fluid from the pump 7) and operates against the action of a spring, consisting of an air spring formed in the first hydraulic cylinder 8 at the opposite end to that comprising the inlet and outlet for the operating fluid originating from the pump 7.
  • the first cylinder 8 is also connected to a unidirectional valve 13 enabling air to enter its interior at that chamber 12 of the first cylinder 8 which defines the spring, only when the cylinder piston rod re-enters the cylinder.
  • the chamber 12 can be pressurized and can contain pressurized fluid (gas) to increase the elastic thrust.
  • the device 1 For regulating the (maximum) pressure of the first cylinder 8, the device 1 comprises a regulating valve 14 connected in parallel with the valve 13.
  • the device also comprises a second hydraulic cylinder 17 for defining the lateral orientation (or swivelling) of the blade 3.
  • the second cylinder 17 is external to the body 5, which (body 5) presents two connectors 18, 19 for connection to the second cylinder 17.
  • the second cylinder 17 is a double acting cylinder (for this reason two feed/discharge connectors are required), consequently the body 5 presents two connectors 18, 19 for feeding the second cylinder 17.
  • the device comprises only one second cylinder 17 connected to one side of the blade 3; the blade 3 also presents a hinge 20 (for example of ball type to enable it to be vertically adjusted and swivelled) for its hinging to a frame of the vehicle 2 on its transverse axis of symmetry.
  • a hinge 20 for example of ball type to enable it to be vertically adjusted and swivelled
  • the body defines a plurality of conduits defining the feed circuit of the first and second cylinder.
  • the body 5 also presents, for feeding the connectors 18, 19, a feed circuit comprising at least one control valve 22, a bypass valve 23 and a non-return valve 24.
  • the feed circuit for the connectors 18, 19 comprises a recirculation valve 25 for the operating liquid leaving one of the chambers of the second cylinder 17, to feed it into the other chamber of the second cylinder 17.
  • the device also comprises a control valve 26 for deviating the flow of operating liquid delivered by the pump 7 from the first cylinder 8 to the second cylinder 17 and vice versa, to enable both the first cylinder 8 and the second cylinder 17 to be operated by a single pump 7.
  • a further unidirectional valve 27 is positioned in the line between the reservoir 6 and the first cylinder 8, to enable or prevent fluid passage through said line, and hence connect or not connect the reservoir to the first cylinder 8.
  • the first cylinder 8 is operated by connecting it to the pump 7 via the valve 26; the pump 7 feeds liquid which enters the cylinder 8 by compressing the air contained in the chamber 12 (which is unable to leave via the unidirectional valve 13); if a safety pressure is exceeded the valve 14 would automatically open to discharge air to the outside.
  • the cylinder 8 When the blade 3 has been brought into the required (vertical) position (adjustment in the direction of the arrow F1), the cylinder 8 is isolated by setting the valve 26 and valve 27 in the configuration shown in Figure 2; in this manner the piston rod of the cylinder 8 is unable to reenter the cylinder because the liquid (incompressible oil) is unable to leave the isolated cylinder 8, and at the same time a force exists which urges the piston rod towards the interior of the cylinder 8 (as indicated by the arrow F), which ensures that the position of the piston rod and hence of the blade 3 is maintained.
  • the blade is raised by operating the valve 27 so that it closes the circuit into which it is connected, in order to enable the liquid contained in the cylinder 8 to discharge into the reservoir 6.
  • the cylinder 17 is operated by suitably controlling the valves 22, 25.
  • valve 22 is kept open (as shown in Figure 2) while the valve 25 is closed (enabling liquid to pass through it); in this manner the liquid pumped by the pump 7 passes through the valve 24 and the valve 25, passes through the connector 18 and enters the chamber 17a of the cylinder 17; at the same time the fluid leaving the chamber 17b passes through the connector 19 and through the valve 25 to also enter the chamber 17a.
  • the cylinder is operated in the direction of the arrow F5 by leaving the valve 25 open and closing the valve 22 (so that this can be traversed by the fluid); in this case the fluid pumped by the pump 7 passes through the valve 24 and the connector 19 to penetrate into the chamber 17b of the cylinder 17.
  • the fluid leaving the chamber 17a of the cylinder 17 passes through the valve 22 to reach the intake side of the pump 7.
  • the bypass valve 23 enables the blade 3 to swing if it is struck laterally.
  • the device of the invention is particularly advantageous as it is very economical and light in weight, and can be easily mounted on generic vehicles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cleaning Of Streets, Tracks, Or Beaches (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Catching Or Destruction (AREA)
EP07102291A 2006-03-01 2007-02-13 Tragevorrichtung für ein Schneeräumschild Withdrawn EP1830004A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000367A ITMI20060367A1 (it) 2006-03-01 2006-03-01 Dispositivo di supporto di una pala spalaneve

Publications (2)

Publication Number Publication Date
EP1830004A2 true EP1830004A2 (de) 2007-09-05
EP1830004A3 EP1830004A3 (de) 2008-11-19

Family

ID=38171091

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07102291A Withdrawn EP1830004A3 (de) 2006-03-01 2007-02-13 Tragevorrichtung für ein Schneeräumschild

Country Status (3)

Country Link
US (1) US20070204488A1 (de)
EP (1) EP1830004A3 (de)
IT (1) ITMI20060367A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ299565B6 (cs) * 2007-12-06 2008-09-03 Vares Mnichovice, A. S. Nosic radlice

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4727665A (en) * 1986-08-22 1988-03-01 Frink America, Inc. Hydraulic actuated moldboard with automatic lock

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3307275A (en) * 1965-08-12 1967-03-07 Douglas Motors Corp Vehicle accessory unit and power unit therefor
US3706144A (en) * 1970-08-06 1972-12-19 Meyer Products Control means for a snow plow
US4244122A (en) * 1979-06-04 1981-01-13 Meyer Products, Inc. Modified power unit for snow plows
US4279084A (en) * 1979-11-15 1981-07-21 Meyer Products, Inc. Snowplow blade lift mount assembly
US4999935A (en) * 1990-05-31 1991-03-19 Douglas Dynamics, Inc. Hydraulic system and apparatus for use with vehicle accessory units
US6253470B1 (en) * 1997-02-21 2001-07-03 Douglas Dynamics Hydraulic and electrical control systems for use with vehicle accessory units

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4727665A (en) * 1986-08-22 1988-03-01 Frink America, Inc. Hydraulic actuated moldboard with automatic lock

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ299565B6 (cs) * 2007-12-06 2008-09-03 Vares Mnichovice, A. S. Nosic radlice

Also Published As

Publication number Publication date
US20070204488A1 (en) 2007-09-06
ITMI20060367A1 (it) 2007-09-02
EP1830004A3 (de) 2008-11-19

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