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EP3974583B1 - Bulldozer - Google Patents

Bulldozer Download PDF

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Publication number
EP3974583B1
EP3974583B1 EP21197319.3A EP21197319A EP3974583B1 EP 3974583 B1 EP3974583 B1 EP 3974583B1 EP 21197319 A EP21197319 A EP 21197319A EP 3974583 B1 EP3974583 B1 EP 3974583B1
Authority
EP
European Patent Office
Prior art keywords
bulldozer
blade
blades
angle
troughs
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
EP21197319.3A
Other languages
German (de)
English (en)
Other versions
EP3974583C0 (fr
EP3974583A1 (fr
Inventor
Veli Tölli
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.)
Katu Karhu Oy
Original Assignee
Katu Karhu 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 Katu Karhu Oy filed Critical Katu Karhu Oy
Publication of EP3974583A1 publication Critical patent/EP3974583A1/fr
Application granted granted Critical
Publication of EP3974583B1 publication Critical patent/EP3974583B1/fr
Publication of EP3974583C0 publication Critical patent/EP3974583C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E02F3/815—Blades; Levelling or scarifying tools
    • E02F3/8155—Blades; Levelling or scarifying tools provided with movable parts, e.g. cutting discs, vibrating teeth or the like
    • 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
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0841—Articulated frame, i.e. having at least one pivot point between two travelling gear units

Definitions

  • This invention relates to a bulldozer that is intended for spreading and levelling road surface material over which an asphalt layer is further intended to be applied, which bulldozer is formed of a frame that is articulated in the middle and of bearing chain track wheels and a front bulldozer blade.
  • road graders having a long frame, front wheels and rear wheels, and wherein the grader blade is located behind the front wheels.
  • the frame is not articulated. This road grader works if the road is long and straight with no bends.
  • the wheels of the road grader easily break a levelled and graded road surface. No evenly bearing track wheels are provided.
  • the object of this invention is to remedy the defects described above.
  • the bulldozer according to the invention is characterized by the features of the appended claim 1.
  • One embodiment of the invention is characterized in that the side blades are foldable by hydraulic cylinders that are known per se.
  • Another embodiment of the invention is characterized in that the bulldozer blade has two troughs in cross-section, wherein the troughs are longitudinally one on top of the other.
  • the bulldozer is intended for spreading and levelling road surface material.
  • An asphalt layer is further intended to be applied over the levelled surface.
  • the bulldozer is formed of a frame 1, 2 that is articulated in the middle and of bearing chain track wheels 3 and a front bulldozer blade 4a, 4b.
  • the bulldozer blade has three parts, a body blade 5 and side blades 6 folding forward substantially to an angle of 90° on both sides, whereby a U-shaped trough 7 is formed in front of the bulldozer.
  • the side blades 6 are foldable by hydraulic cylinders that are known per se. Not illustrated in the drawing.
  • the bulldozer blade 4b has two troughs in cross-section, wherein the troughs 8, 9 are longitudinally one on top of the other.
  • the frame of the bulldozer is divided into two parts, a front part 1 and a rear part 2, attached to each other in an articulated manner.
  • the articulation is arranged in the vertical direction, whereby the front part and the rear part may pivot relative to each other in the horizontal plane. This enables nimbler operation of the device because due to the articulation, the device can be turned even in a narrow place. At the same time, the precision of work is improved and the device may also be easily used at winding and narrow work sites.
  • the device comprises bearing chain track wheels 3 by means of which the weight of the device can be distributed over a larger area than by using traditional wheels, whereby the device leaves less marks on the working surface, or does not leave any marks at all.
  • Two of the chain track wheels may be arranged in the front part on opposite sides thereof and two may be arranged in the rear part on opposite sides thereof.
  • the device may also comprise more of the chain track wheels in the front part and/or the rear part on different sides thereof.
  • the chain track wheel may have a triangular design, when the chain track wheel is viewed from the side.
  • the chain track wheel comprises three track wheels that are arranged so that two of the track wheels are arranged so to speak facing the ground, and one is arranged over these two track wheels in the middle, as is illustrated in Fig. 1 .
  • the track of the track wheel is arranged to run around the track wheels.
  • the bulldozer blade of the device is fixedly attached to the front part of the frame, such that the position of the bulldozer blade may be changed.
  • the bulldozer blade may be tilted as desired forward and backward, or it may be turned in the horizontal plane, whereby the material being worked may be guided to the side with the bulldozer blade.
  • the bulldozer blade may be attached to the front part of the frame for example with hydraulic cylinders by means of which the position of the bulldozer blade may be changed.
  • the front part of the bulldozer may comprise a cab in which the control devices of the device are arranged.
  • the control devices may comprise means required to control the device, such as a steering wheel and control means for moving the device forward and backward.
  • the cab may comprise bulldozer blade control means for changing its position.
  • the bulldozer blade must be fixedly attached, because the material being levelled, such as stones, gravel etc., is very heavy and the bulldozer blade must withstand the forces exerted by the material without the bulldozer blade starting to move by the effect of the forces applied thereto.
  • fixed attachment it is meant that the bulldozer blade is rigidly attached to the front part of the bulldozer, whereby the bulldozer blade is supported by the whole weight of the device.
  • the bulldozer blade 4a, 4b may be attached to the front part 1 fully or partly hydraulically, e.g. by hydraulic cylinders, whereby the position of the bulldozer blade may be changed hydraulically.
  • the bulldozer blade comprises a body blade 5 and side blades 6 arranged at both ends of the body blade 5.
  • the angle of the side blades 6 in relation to the body blade 5 may be adjusted in the horizontal plane between 90-180 degrees.
  • the side blades 6 are at an angle of 180 degrees relative to the body blade 5 and in Fig. 3 the side blades are at an angle of 90 degrees relative to the body blade 5.
  • the angle of each side blade 6 may be adjusted independently, irrespective of the angle of the other side blade, or the angle of the side blades may be adjusted synchronously.
  • a bar that is fitted with a camera for imaging the road surface or other material being moved may be attached to the upper part of the body blade of the bulldozer blade.
  • the cab of the device may comprise a display to which the signal of the camera may be transmitted and the driver or user of the device sees in real time what is happening in front of the bulldozer blade.
  • the driver is able to react quickly if something appears in front of the bulldozer blade that should not be there, or is able to control the device in places that require precision.
  • the upper part of the body blade 5 may also comprise two transmitters by means of which the position of the bulldozer blade may be determined.
  • the transmitters are arranged at the ends of the upper part of the body blade so that one transmitter is close to a first side part and another transmitter is close to a second side part. Thus the exact position of the blade can be detected.
  • the detection of the position may be based on GPS (Global Positioning System).
  • the device may also comprise more transmitters.
  • Two masts may be attached to the body blade 5 such that the masts are attached to the upper edge of the body blade close to the point of attachment of the side parts, whereby they extend vertically upwards from the surface being worked.
  • the transmitters can be attached to these masts.
  • the body blade 5 and the side blades 6 each comprise a cutting edge part that is arranged to the lower edge of the blades, extending vertically towards the surface being levelled, i.e. during work the cutting edge is oriented at an angle of approximately 90 degrees relative to the surface being worked.
  • This has the advantage that the bulldozer blade is not lifting, i.e. it does not peel material off the surface being worked, but only levels it to a desired level.
  • the cutting edge part may be manufactured from a different material than the other parts of the bulldozer blade.
  • the cutting edge part may be removably attached to the blades, whereby the cutting edge parts may be replaced as they wear down.
  • the bulldozer blade may have two troughs in cross-section, i.e. cross-section as viewed from the side, wherein the troughs 8, 9 are longitudinally, i.e. in the vertical direction, one on top of the other above the cutting edge part.
  • the material being levelled/moved does not uncontrollably accumulate in front of the bulldozer blade, but can be spread evenly along the whole width of the bulldozer blade. This way the material being levelled can also be better compacted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Road Paving Machines (AREA)

Claims (12)

  1. Bulldozer qui est destiné à étaler et niveler un matériau de surface de route sur lequel une couche d'asphalte est ensuite destinée à être appliquée, lequel bulldozer est formé d'un châssis (1, 2) qui est articulé au milieu et de roues porteuses sur chenilles (3) et d'une lame de bulldozer avant (4a, 4b), caractérisé en ce que
    la lame de bulldozer (4a, 4b) présente trois parties, une lame de corps (5) et des lames latérales (6) se repliant vers l'avant jusqu'à un angle de 90° des deux côtés, moyennant quoi une auge en forme de U (7) est formée à l'avant du bulldozer, dans lequel
    la lame de corps (5) et les lames latérales (6) comprennent chacune une partie de bord de coupe qui est agencée sur des bords inférieurs des lames et, en fonctionnement, le bord de coupe s'étend verticalement vers la surface qui est nivelée à un angle de 90 degrés par rapport à la surface qui est travaillée.
  2. Bulldozer selon la revendication 1, caractérisé en ce que les lames latérales (6) peuvent être repliées par des vérins hydrauliques connus en soi.
  3. Bulldozer selon la revendication 1 ou la revendication 2, caractérisé en ce que la lame de bulldozer (4b) présente deux auges en section transversale, dans lequel les auges (8, 9) sont longitudinalement et l'une sur l'autre.
  4. Bulldozer selon la revendication 1, dans lequel le châssis (1, 2) comprend une partie avant et une partie arrière fixées l'une à l'autre de manière articulée.
  5. Bulldozer selon la revendication 4, dans lequel la partie avant du châssis comprend deux roues sur chenilles agencées sur des côtés opposés de la partie avant, et la partie arrière du châssis comprend deux roues sur chenilles agencées sur des côtés opposés de la partie arrière.
  6. Bulldozer selon la revendication 4 ou la revendication 5, dans lequel la lame de bulldozer (4. 4a) est attachée de manière fixe à la partie avant du châssis, de sorte que la position de la lame de bulldozer peut être changée à partir de la cabine.
  7. Bulldozer selon l'une quelconque des revendications 1 à 6, dans lequel l'angle des lames latérales par rapport à la lame de corps peut être réglé entre 90 et 180 degrés.
  8. Bulldozer selon l'une quelconque des revendications 1 à 7, dans lequel l'angle de chaque lame latérale peut être réglé de manière indépendante, sans tenir compte de l'angle de l'autre lame latérale.
  9. Bulldozer selon l'une quelconque des revendications 1 à 8, dans lequel une barre qui est montée avec une caméra pour imager le matériau de surface de route est fixée à la partie supérieure de la lame de corps (5).
  10. Bulldozer selon l'une quelconque des revendications 1 à 9, dans lequel la partie supérieure de la lame de corps (5) comprend deux émetteurs à l'aide desquels la position de la lame de bulldozer peut être déterminée et parmi lesquels un émetteur est positionné à proximité du point de fixation d'une première lame latérale et un autre émetteur est positionné à proximité du point de fixation d'une seconde lame latérale.
  11. Bulldozer selon l'une quelconque des revendications 1 à 10, dans lequel la lame de corps (5) et les lames latérales (6) comprennent chacune une partie de bord de coupe qui est agencée au niveau du bord inférieur des lames, s'étendant verticalement vers la surface à niveler.
  12. Bulldozer selon l'une quelconque des revendications 1 à 11, dans lequel la lame de bulldozer (4b) présente deux auges en section transversale, dans lequel les auges (8, 9) sont dans la direction verticale l'une sur l'autre au-dessus de la partie de bord de coupe.
EP21197319.3A 2020-09-24 2021-09-17 Bulldozer Active EP3974583B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FIU20200099U FI12809Y1 (fi) 2020-09-24 2020-09-24 Puskuhöylä

Publications (3)

Publication Number Publication Date
EP3974583A1 EP3974583A1 (fr) 2022-03-30
EP3974583B1 true EP3974583B1 (fr) 2025-06-11
EP3974583C0 EP3974583C0 (fr) 2025-06-11

Family

ID=73135877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21197319.3A Active EP3974583B1 (fr) 2020-09-24 2021-09-17 Bulldozer

Country Status (2)

Country Link
EP (1) EP3974583B1 (fr)
FI (1) FI12809Y1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4082646B2 (ja) * 1999-11-19 2008-04-30 株式会社小松製作所 排土板の前方監視装置付き車両
US7481011B2 (en) * 2004-03-30 2009-01-27 Nth Inc. Double wing scraper
US7581598B2 (en) * 2004-11-29 2009-09-01 Deere & Company Blade motion reduction
US8061063B2 (en) * 2008-06-17 2011-11-22 Sno-Way International, Inc. Plow wing blade
CN205617458U (zh) * 2016-03-15 2016-10-05 徐工集团工程机械有限公司 平地机刀片、平地机及推土机

Also Published As

Publication number Publication date
FI12809Y1 (fi) 2020-10-23
EP3974583C0 (fr) 2025-06-11
EP3974583A1 (fr) 2022-03-30

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