WO1991007547A1 - Scraper blade and control mechanism thereof for use in road levelling - Google Patents

Scraper blade and control mechanism thereof for use in road levelling Download PDF

Info

Publication number
WO1991007547A1
WO1991007547A1 PCT/FI1990/000269 FI9000269W WO9107547A1 WO 1991007547 A1 WO1991007547 A1 WO 1991007547A1 FI 9000269 W FI9000269 W FI 9000269W WO 9107547 A1 WO9107547 A1 WO 9107547A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
mounting point
lateral direction
point
horizontal plane
Prior art date
Application number
PCT/FI1990/000269
Other languages
French (fr)
Inventor
Ari Turpeinen
Original Assignee
Koillismaan Hitsauspalvelu Avoin Yhtiö
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 Koillismaan Hitsauspalvelu Avoin Yhtiö filed Critical Koillismaan Hitsauspalvelu Avoin Yhtiö
Publication of WO1991007547A1 publication Critical patent/WO1991007547A1/en
Priority to SE9101780A priority Critical patent/SE466859B/en
Priority to NO912679A priority patent/NO175439C/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/80—Component parts
    • E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
    • E02F3/844—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/7636—Graders with the scraper blade mounted under the tractor chassis

Definitions

  • the invention relates to an control mechanism of a scraper blade attachable to a vehicle for use in road levelling.
  • the invention particularly relates to scraper blades which are mounted under a vehicle on the chassis beams for use in road levelling and other road maintenance tasks.
  • This kind of scraper blades provide an alternative to the heavier implements used for operations like dragging, scarifying etc.
  • the blade must be adjustable during motion of the vehicle, so that the angle between the lateral direction of the blade and the driving direction changes permitting the surface material to be displaced either to the roadside or to the middle of the road.
  • tilting of the blade in a vertical plane relative to the direction of driving must be possible in order to adapt the blade to the inclination of the ground surface or in order to obtain a desired inclination for the ground surface.
  • the FI patent publication presents a grader, wherein the angle of the blade relative to the driving direction can be adjusted by changing the length of two hydraulically operated telescopic arms.
  • the apparatus is provided with two hydraulic cylinders on both sides of the vehicle for lifting and lowering the blade. Also in this case, positioning of the blade requires use of at least two hydraulically adjustable arms.
  • Figure 1 shows a side view of the mechanism
  • Figure 2 shows a side view of the mechanism seen from the other side
  • Figure 3 shows a view of the mechanism seen from the back of the blade.
  • the scraper blade 6 and its control mechanism are attached under the vehicle to the chassis beam 1 e.g. by means of a plate 3 from which the blade is suspended. E.g. bolted joints are used for the attachment and detachment of the plate 3.
  • the scraper blade and the control mechanism thereof comprise a blade resembling a bulldozer blade " and being provided with an extension blade 13, which itself is known in prior art, movable by means of a hydraulic cylinder 12, and two hydraulic cylinders 2 and 10.
  • the mechanism additionally comprises a pendulum screw 8 and a vertical screw articulation 4 which members are extendable and provided with articulations permitting rotations in directions necessary for the operation of the blade and which constitute the suspensions for the blade.
  • the lower end of the rotatable pin of the vertical screw articulation 4 forms an angle constituting a lever arm 11 for the lateral shift, the lever arm 11 being rotatable only round the axis of the vertical screw articulation 4 and being rigidly attached to the blade in the horizontal plane.
  • the blade 6 is attached to the lever arm 11 by means of a cross articulation 5 allowing turning of the blade backward and forward relative to the cross articulation and turning of the blade in the vertical plane so that tilt of the blade can be adjusted while rigid in the horizontal plane as mentioned earlier.
  • the second mounting point 7 consists of a cross articulation arranged at the end of the pendulum screw, which functions as a swinging arm 8.
  • the cross articulation 7 allows turning of the blade backward and forward in the same way as in the cross articulation 5.
  • An operating device 10 having an extendable and retractable member, e.g. a hydraulic cylinder, which is controlled from the driver's cabin, is attached to the chassis at one end and to the swinging arm 8 at the other end by means of ball joints.
  • the plane of motion of the second mounting point 7 and that of the first mounting point 5 form an acute angle i.e. the pivot line of the swinging arm 8 (dashed line in figure 3) is at angle with the pivot line of the lever arm 11 (i.e. the axis of the vertical screw articulation 4, also shown in figure 3) .
  • a hydraulic tilting cylinder 2 is, at its other end, articulated to the backside of the blade at the same place, in the lateral direction of the blade, as the first mounting point 5. In this place, the cylinder lies approximately in the same vertical plane as the lever arm 11. The other end of the cylinder 2 is articulated to the chassis. Tilting of the blade in a vertical plane perpendicular to the lateral direction of the blade can be adjusted by means of the cylinder 2.
  • Figure 1 also shows how a pressure accumulator 14, provided with a pressure regulating valve 15, is connected to the pressure side of the cylinder 2.
  • the pressure accumulator 14 functions in case of overload, e.g. when the blade meets with a stone so that hydraulic pressure exceeds the set pressure limit of the pressure regulating valve 15.
  • the valve 15 will then open and the hydraulic liquid will discharge into the pressure accumulator 14 as long as the blade has tilted enough to overcome the obstacle.
  • the hydraulic liquid returns via the check valve 16 passing by the regulating valve 15 and then, by the effect of the overpressure of the liquid in the accumulator, the blade returns to the original position thus permitting uninterrupted continuation of the work.
  • Position of the blade can be so adjusted that the surface material of the road can be displaced either to the road side or to the road middle.
  • Lengths of the swinging arm 8 and the vertical screw articulation 4 can be adjusted before the motion of the vehicle using known techniques in order to adjust the mechanism inclusive the blade to a desired position relative to the chassis.
  • adjustable screws so-called rigging screws can be used permitting adjustment to be performed from the side.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Road Repair (AREA)
  • Operation Control Of Excavators (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The invention relates to a control mechanism of a scraper blade attachable under a vehicle, the mechanism comprising means for rotating the blade (6) in a horizontal plane, so that the lateral direction of the blade forms a specific angle with the driving direction, and means for tilting the blade (6) in a vertical plane parallel with the blade. Said means comprise a first mounting point (5) arranged to be movable in the horizontal plane for achieving said rotation of the blade. At this point the blade (6) is arranged to be movable, in a vertical plane parallel with the lateral direction of the blade for achieving said tilting motion of the blade. The means also comprise a second mounting point (7) which is arranged to be movable in a transverse plane relative to the lateral direction of the blade, preferably at the end of a swinging arm (8) articulated to the chassis (1), so that the motion of the second supporting point (7) brings about both tilting of the blade in the lateral direction and rotation of the blade relative to the driving direction.

Description

SCRAPER BLADE AND CONTROL MECHANISM THEREOF FOR USE IN ROAD LEVELLING
The invention relates to an control mechanism of a scraper blade attachable to a vehicle for use in road levelling. The invention particularly relates to scraper blades which are mounted under a vehicle on the chassis beams for use in road levelling and other road maintenance tasks. This kind of scraper blades provide an alternative to the heavier implements used for operations like dragging, scarifying etc. Furthermore, the blade must be adjustable during motion of the vehicle, so that the angle between the lateral direction of the blade and the driving direction changes permitting the surface material to be displaced either to the roadside or to the middle of the road. Similarly, tilting of the blade in a vertical plane relative to the direction of driving must be possible in order to adapt the blade to the inclination of the ground surface or in order to obtain a desired inclination for the ground surface.
Control mechanisms of this kind for scraper blades have been presented e.g. in the patent publications US 4,258,797 and FI 58378. The former publication presents an undervehicle scraper blade where the angle between the lateral direction of the blade and the direction of motion can be adjusted by means of a hydraulic cylinder and also the tilt angle can be adjusted to some extend by means of a second hydraulic cylinder. The scraper blade is movably attached to the underbody of the vehicle, to a horizontal turntable mounting assembly. The mechanism includes two separate hydraulic units to be controlled for positioning the blade.
The FI patent publication presents a grader, wherein the angle of the blade relative to the driving direction can be adjusted by changing the length of two hydraulically operated telescopic arms. In addition, the apparatus is provided with two hydraulic cylinders on both sides of the vehicle for lifting and lowering the blade. Also in this case, positioning of the blade requires use of at least two hydraulically adjustable arms.
These apparatuses show several drawbacks in that they are heavy and they have a complicated structure due to the fact that several adjustable members are required.
It is an object of the present invention to remove said drawbacks and to obtain a control mechanism with a simpler and less weighing structure which is easier to use. According to the invention, these objects can be attained by a mechanism having the characteristic features presented in the novelty part of claim 1. By the movements of two mounting points of the blade, located at a distance from each other, along paths according to the invention both tilting of the blade and direction of the blade relative to the driving direction can be accomplished by means of one and the same adjustable member and therefore the control mechanism is much simpler than those of the above solutions.
Some beneficial structural features of the mechanism according to the invention are presented in the enclosed subclaims which simplify the structure and improve its operational capabilities.
The invention will now be further described referring to the enclosed drawings:
Figure 1 shows a side view of the mechanism, Figure 2 shows a side view of the mechanism seen from the other side, Figure 3 shows a view of the mechanism seen from the back of the blade.
The scraper blade 6 and its control mechanism are attached under the vehicle to the chassis beam 1 e.g. by means of a plate 3 from which the blade is suspended. E.g. bolted joints are used for the attachment and detachment of the plate 3.
The scraper blade and the control mechanism thereof comprise a blade resembling a bulldozer blade "and being provided with an extension blade 13, which itself is known in prior art, movable by means of a hydraulic cylinder 12, and two hydraulic cylinders 2 and 10. The mechanism additionally comprises a pendulum screw 8 and a vertical screw articulation 4 which members are extendable and provided with articulations permitting rotations in directions necessary for the operation of the blade and which constitute the suspensions for the blade. The lower end of the rotatable pin of the vertical screw articulation 4 forms an angle constituting a lever arm 11 for the lateral shift, the lever arm 11 being rotatable only round the axis of the vertical screw articulation 4 and being rigidly attached to the blade in the horizontal plane. The blade 6 is attached to the lever arm 11 by means of a cross articulation 5 allowing turning of the blade backward and forward relative to the cross articulation and turning of the blade in the vertical plane so that tilt of the blade can be adjusted while rigid in the horizontal plane as mentioned earlier.
The second mounting point 7 consists of a cross articulation arranged at the end of the pendulum screw, which functions as a swinging arm 8. The cross articulation 7 allows turning of the blade backward and forward in the same way as in the cross articulation 5. An operating device 10 having an extendable and retractable member, e.g. a hydraulic cylinder, which is controlled from the driver's cabin, is attached to the chassis at one end and to the swinging arm 8 at the other end by means of ball joints.
The plane of motion of the second mounting point 7 and that of the first mounting point 5 form an acute angle i.e. the pivot line of the swinging arm 8 (dashed line in figure 3) is at angle with the pivot line of the lever arm 11 (i.e. the axis of the vertical screw articulation 4, also shown in figure 3) . This has been realized in practice so that the swinging arm 8, at the upper end thereof, is suspended from a pivot pin whose axis forms a suitable angle with the axis of the vertical screw articulation 4 so that the combined action of the swinging arm 8, the vertical screw articulation 4 and the lever arm 11 thereof permits moving of the blade into* a desired position by means of the hydraulic cylinder 10 so that scraping of the road results in a desired inclination of the road surface and so that, during the motion of the vehicle, displacement of the surface material to the road side or onto the road can be adjustably controlled by a control system located in the driver's cabin.
A hydraulic tilting cylinder 2 is, at its other end, articulated to the backside of the blade at the same place, in the lateral direction of the blade, as the first mounting point 5. In this place, the cylinder lies approximately in the same vertical plane as the lever arm 11. The other end of the cylinder 2 is articulated to the chassis. Tilting of the blade in a vertical plane perpendicular to the lateral direction of the blade can be adjusted by means of the cylinder 2.
Figure 1 also shows how a pressure accumulator 14, provided with a pressure regulating valve 15, is connected to the pressure side of the cylinder 2. The pressure accumulator 14 functions in case of overload, e.g. when the blade meets with a stone so that hydraulic pressure exceeds the set pressure limit of the pressure regulating valve 15. The valve 15 will then open and the hydraulic liquid will discharge into the pressure accumulator 14 as long as the blade has tilted enough to overcome the obstacle. As soon as the obstacle has been overcome, the hydraulic liquid returns via the check valve 16 passing by the regulating valve 15 and then, by the effect of the overpressure of the liquid in the accumulator, the blade returns to the original position thus permitting uninterrupted continuation of the work.
Position of the blade can be so adjusted that the surface material of the road can be displaced either to the road side or to the road middle.
Lengths of the swinging arm 8 and the vertical screw articulation 4 can be adjusted before the motion of the vehicle using known techniques in order to adjust the mechanism inclusive the blade to a desired position relative to the chassis. As adjustable screws, so-called rigging screws can be used permitting adjustment to be performed from the side.

Claims

Claims
1. Control mechanism of a scraper blade attachable to a vehicle for use in ground levelling, wherein means for rotating the blade (6) , in a horizontal plane, relative to the vehicle, so that the lateral direction of the blade forms a specific angle with the driving direction, and means for turning the blade (6) in a vertical plane pa¬ rallel to the blade i.e. tilting the lateral direction of the blade, so that it forms a desired angle with respect to a horizontal plane, comprise a first mounting point (5) of the blade (6) at which point the blade is suspended from the vehicle chassis (1) and a second mounting point (7) , located at a distance from the first supporting point (5) , at which point the blade is also suspended from the vehicle chassis, characterized in that the first mounting point (5) is arranged to be rotatable in the horizontal plane for achieving said rotation of the blade and that the blade (6) is arranged to be movable, at the point of the first mounting point (5) , in a vertical plane parallel with the lateral direction of the blade and perpendicular to said horizontal plane for achieving said tilting motion of the blade, and that the second mounting point (7) is arranged to be movable in a plane which is transverse relative to the lateral direction of the blade, preferably at the end of a swinging arm (8) articulated to the chassis (1) , so that the motion of said second supporting point (7) brings about both tilting of the blade in the lateral direction and rotation of the blade relative to the driving direction.
2. Mechanism according to claim 1, characterized in that it comprises an extendable and retractable, preferably a hydraulically operating device (10) which, at the other end thereof, is attached to the chassis (1) and which is arranged to accomplish said rotating and tilting motions and which can be extended and retracted from the driver's cabin.
3. Mechanism according to claim 2, characterized in that the device (10) is attached, at the other end thereof, to the swinging arm (8) supporting the second mounting point (7).
4. Mechanism according to any of the above claims, characterized in that the first mounting point (5) is arranged to be movable in a horizontal plane, preferably at the end of an arm (11) which is articulated to the chassis (1) by means of a vertical articulation (4) , and the second mounting point (7) is arranged to be movable at the end of the swinging arm (8) in a plane which is inclined relative to said horizontal plane.
5. Mechanism according to claim 4, characterized in that the distance between said horizontal plane and the chassis
(1) and the length of the arm (8) can be changed to have a desired constant distance and length during the motion of the vehicle.
6. Mechanism according to any of the above claims, characterized in that the side edge of the blade (6) , on the same side of the blade as the first mounting point (5) , is lengthened by means of an extension blade (13) , known in itself, which is movable in the lateral direction of the blade (6) .
PCT/FI1990/000269 1989-11-17 1990-11-13 Scraper blade and control mechanism thereof for use in road levelling WO1991007547A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE9101780A SE466859B (en) 1989-11-17 1991-06-12 Control mechanism for a scraper blade used in ground- levelling work
NO912679A NO175439C (en) 1989-11-17 1991-07-09 Control device for a cutting or plow blade for use in field planning work

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI895498 1989-11-17
FI895498A FI83353C (en) 1989-11-17 1989-11-17 ANVAENDNINGSMEKANISM AV ETT VID ETT FORDON FAESTBART UTJAEMNINGSSKAER FOER JORDYTA.

Publications (1)

Publication Number Publication Date
WO1991007547A1 true WO1991007547A1 (en) 1991-05-30

Family

ID=8529377

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1990/000269 WO1991007547A1 (en) 1989-11-17 1990-11-13 Scraper blade and control mechanism thereof for use in road levelling

Country Status (4)

Country Link
AU (1) AU6638790A (en)
FI (1) FI83353C (en)
SE (1) SE466859B (en)
WO (1) WO1991007547A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008022403A1 (en) * 2006-08-24 2008-02-28 Rodney Milthorpe Method and apparatus for distributing particulate matter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061956A (en) * 1960-08-10 1962-11-06 Frank I Braden Hydraulically controlled sloping attachment for graders
US4013132A (en) * 1975-01-06 1977-03-22 Mitsubishi Jukogyo Kabushiki Kaisha Device for supporting bulldozer blade
FI58378B (en) * 1978-12-29 1980-09-30 Aarre Sinkkilae JORDUTJAEMNINGSHYVEL SAERSKILT VAEGHYVEL
US4258797A (en) * 1978-04-03 1981-03-31 Mckenzie Neil D Scraper blade undercarriage mounting assembly
FI78757B (en) * 1987-11-23 1989-05-31 Vammaskosken Tehdas DRAGMEKANISM VID EN UTBREDARE FOER MATERIALSTRAENG.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061956A (en) * 1960-08-10 1962-11-06 Frank I Braden Hydraulically controlled sloping attachment for graders
US4013132A (en) * 1975-01-06 1977-03-22 Mitsubishi Jukogyo Kabushiki Kaisha Device for supporting bulldozer blade
US4258797A (en) * 1978-04-03 1981-03-31 Mckenzie Neil D Scraper blade undercarriage mounting assembly
FI58378B (en) * 1978-12-29 1980-09-30 Aarre Sinkkilae JORDUTJAEMNINGSHYVEL SAERSKILT VAEGHYVEL
FI78757B (en) * 1987-11-23 1989-05-31 Vammaskosken Tehdas DRAGMEKANISM VID EN UTBREDARE FOER MATERIALSTRAENG.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008022403A1 (en) * 2006-08-24 2008-02-28 Rodney Milthorpe Method and apparatus for distributing particulate matter
US8016045B2 (en) 2006-08-24 2011-09-13 Rodney Milthorpe Method and apparatus for distributing particulate matter

Also Published As

Publication number Publication date
SE9101780L (en) 1991-06-12
FI895498A0 (en) 1989-11-17
SE9101780D0 (en) 1991-06-12
AU6638790A (en) 1991-06-13
SE466859B (en) 1992-04-13
FI83353C (en) 1991-06-25
FI83353B (en) 1991-03-15

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