EP1113110A1 - Snowplow provided with a protection device against collision with fixed obstacles - Google Patents
Snowplow provided with a protection device against collision with fixed obstacles Download PDFInfo
- Publication number
- EP1113110A1 EP1113110A1 EP99830824A EP99830824A EP1113110A1 EP 1113110 A1 EP1113110 A1 EP 1113110A1 EP 99830824 A EP99830824 A EP 99830824A EP 99830824 A EP99830824 A EP 99830824A EP 1113110 A1 EP1113110 A1 EP 1113110A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- snowplow
- control unit
- snowplow according
- causing
- 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- Withdrawn
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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
- E01H5/063—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 snow-plough blades tiltable for shock-absorbing purposes
Definitions
- the present invention concerns a snowplow provided with a protection device against collision with fixed obstacles.
- the invention concerns a snowplow of which the blades are mounted so as to allow overcoming fixed obstacles of limited height, projecting from the ground.
- Italian patent application No. TO93A000411 in the name of the same Applicant discloses a hydraulic system allowing automatically lifting the snowplow blade when the latter finds an obstacle.
- the blade which can be a single blade or a spade, is mounted on a frame which can slide parallel to the direction'of advance of the snowplow and is arranged to cause the frame to slide when the blade meets a resistance to the advance exceeding a predetermined value.
- the frame is connected to a hydraulic jack that is part of the blade lifting system and reacts to the frame sliding by making the blade to be lifted.
- the aim of the invention is to provide a snowplow provided with an active protection device against collision with fixed obstacles, suitable for being mounted on any kind of blade.
- a snowplow provided with a protection device against collision with fixed obstacles comprising an electrical/electronic system for detecting and controlling the movements to the blade carrying means.
- the system for protection against collision with fixed obstacles can advantageously be employed in conjunction with any device intended for road cleaning, such as for instance a snowplow, mounted in the front part of a tractor or similar vehicle.
- the system is capable of intervening quickly, in precise and selective manner, since it has an intervention threshold which is programmable and readily modifiable.
- a snowplow, of the single-blade or spade type is mounted on the front part of a vehicle or tractor by means of a frame equipped with an articulated quadrilateral structure allowing the distance of the scraping blades 2 from the ground to be varied by means of a lifting cylinder or jack 10.
- Double-cylinder jack 10 besides being operable by an operator, in conventional manner, can also cause the lifting of the structure in case of a collision against an obstacle, as will be disclosed hereinafter.
- Blade 2 is secured to a sliding frame element, joined to the movable part of the articulated quadrilateral and associated with a hydraulic cylinder 4 having a first chamber 4b connected, through a hydraulic connection 28, with a pressure sensor or transducer 18.
- chamber 4b of hydraulic cylinder 4 can be directly connected with a chamber 14 of jack 10, through hydraulic connection 30, thereby allowing combining the lifting system according to the present invention with the conventional safety systems.
- Piston rod 6 of pump hydraulic cylinder 4 is secured to blade 2, whereas the body of pump cylinder 4 is secured to the fixed part of the frame.
- the movements of blade 2 upon a collision with a fixed obstacle, which are hindered by the action of contrasting springs 8, cause a pressure increase in hydraulic connection 28 with sensor 18, and a consequent liquid inflow into chamber 14 of hydraulic jack 10, if hydraulic connection 30 is provided.
- Control unit 20 is equipped with a console 42 for the management of the threshold of intervention of the blade lifting system, which console allows the operator to vary at will such threshold depending on the operating conditions, such as for instance the amount of snow to be removed, the snow density or the presence of ice slabs on the road.
- a second console 44 allows instead varying, by means of a programmable timer, the time by which the blade remains lifted after having met an obstacle.
- a function of control unit 20 is therefore comparing the signal coming from sensor 18 with a threshold value set by means of console 42, and operating a first section 22a of electric valve 22 when said threshold value is exceeded. Thereafter, when the time set by means of timing console 44 is over, the control unit commands the closure of the first section 22a of electric valve 22 and at the same time the opening of the second section 22b, thereby causing the blade lowering.
- the first section 22a of electric valve 22 allows, through a hydraulic connection 38, the inflow of pressure liquid, fed from a oil-pressure pump 24 equipped with a tank, into a second chamber 16 of lifting jack 10, thereby causing the immediate lifting of blade 2.
- the first section 22a of electric valve 22 can also be connected, through a hydraulic connection 40, to a second chamber 4a of pump cylinder 4, so as to cause the closure thereof.
- a closure makes blade 2 move back and, through hydraulic connection 30, assists in the blade lifting by means of cylinder 10, thereby contributing to the shock absorbing action upon a collision.
- the second section 22b of electric valve 22 allows discharging the pressure liquid present in duct 30 or in duct 40 into a tank 26, thereby causing the lowering of blade 2.
- pump cylinder 4 is not indispensable since sensor 18, e.g. in the form of an electric contact, a slide-wire potentiometer, a magnetic sensor or an opto-electronic device, can directly detect the displacements of blade 2 and transmit a corresponding signal to control unit 20 which will control electric valve 22 according to the principles described above.
- sensor 18 e.g. in the form of an electric contact, a slide-wire potentiometer, a magnetic sensor or an opto-electronic device, can directly detect the displacements of blade 2 and transmit a corresponding signal to control unit 20 which will control electric valve 22 according to the principles described above.
- pressure sensor 18 could be connected with the hydraulic circuits of the oil-pressure cylinders used in spade snowplows to open and close the two blades. In effect, the collision with an obstacle would cause a pressure increase, which could be readily detected by the proper sensor.
Abstract
Description
Claims (12)
- Snowplow provided with a protection device against collision with fixed obstacles, comprising at least one blade (2) carried by a frame that can be fastened to the front part of a vehicle and that is provided with means (10) for causing a vertical displacement of the blade (2) to vary its distance from the ground, said blade being arranged to perform a translation movement in the direction of advance of the snowplow or a rotation movement about an own axis, characterised in that the snowplow comprises a detection system (4, 18) arranged to detect said movement of the blade (2), and an active operating system (20, 22) arranged to lift said blade (2) from the ground, by operating said means (10) for causing a vertical displacement of the blade (2) if said movement of the blade (2) exceeds a predetermined intervention threshold.
- Snowplow according to claim 1, comprising a pump cylinder (4), arranged between said blade (2) and said frame so as to be compressed when said blade (2) is pushed towards said vehicle upon a collision with an obstacle, said pump cylinder (4) having a first chamber (4b) connected with a pressure sensor (18) through a hydraulic circuit (28).
- Snowplow according to claim 1 or 2, wherein said sensor (18) is a transducer connected with a control unit (20) which acts upon a lifting cylinder (10) arranged to cause the vertical displacement of said blade (2).
- Snowplow according to claim 3, wherein said sensor (18) is a pressure switch.
- Snowplow according to claim 3 when referred to claim 2, wherein said first chamber (4b) of the pump cylinder (4) is connected, through a hydraulic circuit (30), also with said lifting cylinder (10).
- Snowplow according to claim 3, wherein the control unit (20) is an electronic control unit.
- Snowplow according to claim 3, wherein said control unit (20) is provided with a programmable timer (44) which allows keeping said blade (2) in lifted position for a predetermined time.
- Snowplow according to claim 3, wherein said control unit (20) allows modifying said intervention threshold by means of an external console (42).
- Snowplow according to claim 3, wherein said control unit (20) controls the opening and closing of a first electric valve (22a) which enables the inflow of a pressure liquid into said lifting cylinder (10), thereby causing the lifting of the blade (2) from the ground.
- Snowplow according to claim 9, wherein said control unit (20) controls the opening and closing of a second electric valve (22b) which enables the outflow of said pressure liquid from said lifting cylinder (10), thereby causing the lowering of the blade (2).
- Snowplow according to claim 5, wherein said control unit (20) controls the opening and closing of a first electric valve (22a) which enables the inflow of a pressure liquid into a second chamber (4a) of said pump cylinder (4), thereby causing the closure thereof and the consequent compression of said first chamber (4b), with a consequent lifting of the blade (2) from the ground.
- Snowplow according to claim 11, wherein said control unit (20) controls the opening and closing of a second electric valve (22b) which enables the outflow of said pressure liquid from the second chamber (4a) of said pump cylinder (4), thereby causing a pressure decrease in the lifting cylinder (10) and the consequent lowering of the blade (2).
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99830824A EP1113110A1 (en) | 1999-12-30 | 1999-12-30 | Snowplow provided with a protection device against collision with fixed obstacles |
AU30167/01A AU3016701A (en) | 1999-12-30 | 2000-12-27 | Snowplow provided with a protection device against collision with fixed obstacles |
PCT/EP2000/013272 WO2001049942A1 (en) | 1999-12-30 | 2000-12-27 | Snowplow provided with a protection device against collision with fixed obstacles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99830824A EP1113110A1 (en) | 1999-12-30 | 1999-12-30 | Snowplow provided with a protection device against collision with fixed obstacles |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1113110A1 true EP1113110A1 (en) | 2001-07-04 |
Family
ID=8243743
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99830824A Withdrawn EP1113110A1 (en) | 1999-12-30 | 1999-12-30 | Snowplow provided with a protection device against collision with fixed obstacles |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1113110A1 (en) |
AU (1) | AU3016701A (en) |
WO (1) | WO2001049942A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITTO20100421A1 (en) * | 2010-05-20 | 2011-11-21 | Univ Degli Studi Torino | DRIVING GROUP FOR VOMERS OF VEHICLES MUSHROOMS WITH SHOCKPROOF DEVICE |
CN102393646A (en) * | 2011-07-05 | 2012-03-28 | 西安赛龙航空科技有限公司 | Multilayered dynamic collision detecting method and system for blade production line |
CN102828487A (en) * | 2011-06-13 | 2012-12-19 | 金平 | Snow-cleaning and ice-removing mechanical device |
US20180127936A1 (en) * | 2016-11-07 | 2018-05-10 | Aebi Schmidt Deutschland Gmbh | Snow-clearing vehicle |
BE1024994B1 (en) * | 2017-07-14 | 2018-09-13 | Cnh Industrial Belgium Nv | Hydraulic actuator |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015222847A1 (en) * | 2015-11-19 | 2017-05-24 | Robert Bosch Gmbh | Method for protecting a unit for clearing snow on a vehicle |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4320589A (en) * | 1978-05-26 | 1982-03-23 | Andrea Pelazza | Snowplow apparatus |
ITTO940313A1 (en) | 1994-04-20 | 1995-10-20 | Giandomenico Pelazza | IMPROVEMENTS TO SNOW PLOWERS WITH MEANS TO ABSORB IMPACTS AGAINST FIXED OBSTACLES |
US5921010A (en) * | 1997-02-12 | 1999-07-13 | Little Falls Machine, Inc. | Flow blade operating system |
-
1999
- 1999-12-30 EP EP99830824A patent/EP1113110A1/en not_active Withdrawn
-
2000
- 2000-12-27 WO PCT/EP2000/013272 patent/WO2001049942A1/en active Application Filing
- 2000-12-27 AU AU30167/01A patent/AU3016701A/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4320589A (en) * | 1978-05-26 | 1982-03-23 | Andrea Pelazza | Snowplow apparatus |
ITTO940313A1 (en) | 1994-04-20 | 1995-10-20 | Giandomenico Pelazza | IMPROVEMENTS TO SNOW PLOWERS WITH MEANS TO ABSORB IMPACTS AGAINST FIXED OBSTACLES |
US5921010A (en) * | 1997-02-12 | 1999-07-13 | Little Falls Machine, Inc. | Flow blade operating system |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITTO20100421A1 (en) * | 2010-05-20 | 2011-11-21 | Univ Degli Studi Torino | DRIVING GROUP FOR VOMERS OF VEHICLES MUSHROOMS WITH SHOCKPROOF DEVICE |
CN102828487A (en) * | 2011-06-13 | 2012-12-19 | 金平 | Snow-cleaning and ice-removing mechanical device |
CN102393646A (en) * | 2011-07-05 | 2012-03-28 | 西安赛龙航空科技有限公司 | Multilayered dynamic collision detecting method and system for blade production line |
CN102393646B (en) * | 2011-07-05 | 2013-06-05 | 西安赛龙航空科技有限公司 | Multilayered dynamic collision detecting method and system for blade production line |
US20180127936A1 (en) * | 2016-11-07 | 2018-05-10 | Aebi Schmidt Deutschland Gmbh | Snow-clearing vehicle |
BE1024994B1 (en) * | 2017-07-14 | 2018-09-13 | Cnh Industrial Belgium Nv | Hydraulic actuator |
WO2019011907A1 (en) * | 2017-07-14 | 2019-01-17 | Cnh Industrial Belgium Nv | Hydraulic actuator |
Also Published As
Publication number | Publication date |
---|---|
WO2001049942A1 (en) | 2001-07-12 |
AU3016701A (en) | 2001-07-16 |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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AK | Designated contracting states |
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17P | Request for examination filed |
Effective date: 20011227 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20030701 |