[go: up one dir, main page]

WO2002033179A1 - Vehicule comportant un outil de travail dans lequel les elements de commande sont accouples a l'outil de travail pour ajuster l'elevation de l'outil de travail - Google Patents

Vehicule comportant un outil de travail dans lequel les elements de commande sont accouples a l'outil de travail pour ajuster l'elevation de l'outil de travail Download PDF

Info

Publication number
WO2002033179A1
WO2002033179A1 PCT/SE2000/002048 SE0002048W WO0233179A1 WO 2002033179 A1 WO2002033179 A1 WO 2002033179A1 SE 0002048 W SE0002048 W SE 0002048W WO 0233179 A1 WO0233179 A1 WO 0233179A1
Authority
WO
WIPO (PCT)
Prior art keywords
work tool
ice
coupled
horizontal force
work
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.)
Ceased
Application number
PCT/SE2000/002048
Other languages
English (en)
Inventor
Göran AXELSSON
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.)
Individual
Original Assignee
Individual
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
Priority to SE9901455A priority Critical patent/SE9901455L/
Application filed by Individual filed Critical Individual
Priority to AU2001211850A priority patent/AU2001211850A1/en
Priority to PCT/SE2000/002048 priority patent/WO2002033179A1/fr
Publication of WO2002033179A1 publication Critical patent/WO2002033179A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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

Definitions

  • This invention relates to a utility vehicle with front and rear driving means against the ground and a work tool in front of the front driving means, in which power means is coupled to the work tool for adjusting the elevation of the work tool.
  • machines of the kind defined above has not been used for larger grading work, for example road grading, since the road will mostly be less even than when conventional road grading machines are used which have their steered wheels a long distance ahead of the grading blade.
  • the degree of fullness is essential for the work efficiency when loading with a loading machine, and a low degree depends usually on low penetration into the bulk mass to be loaded.
  • the invention can be utilised for various kinds of work, for example road grading, snow removing, ice cutting, loading, pisting, etc.
  • the invention is defined by the claims.
  • FIG. 1 shows in a side view a contractor's utility vehicle which is in accordance with the invention. Detailed description of an illustrated embodiment of the invention
  • the figure shows a utility vehicle, a contractor's utility vehicle, in the form of a tractor with a work tool in the form of a blade.
  • the tractor has a pair of driving front wheels 12 and a pair of driving rear wheels 13 and most of the weight of the machine is on the rear wheels since the power drive including the diesel engine is located above the wheels 13. Either the front pair or the rear pair of wheels is steerable.
  • the machine carries in a conventional manner a blade 11 in two arms 14 which are swingable about horizontal shafts by means of power means in the form of hydraulic cylinders 15, the lifting cylinders.
  • the blade 11 is removably mounted in plates 16 which are pivotably mounted in the outer parts of the arms 14.
  • the plates are pivotable by means of power means in the form of hydraulic cylinders 17, tilting cylinders, and a linkage 18, which give the blade 11 a parallel movement when it is raised or lowered by means of the lifting cylinders 15.
  • the blade 11 has rear mounting plates 20 and upper and lower beams 21 ,22 between the mounting plates 20 and the blade 11 proper.
  • On the lower beam 22 is a sensor 23 that senses the horizontal force on the blade 11. This sensor 23 is coupled to a control device 24 which in turn is coupled to control the lifting cylinders 15.
  • the machine has both its front wheel and its rear wheels driving, and the normal force available between the wheels and the ground and the distribution of the normal force between the two pair of wheels determines the driving force for any coefficient of friction.
  • the work tool tends to have a large vertical force against the subsurface, which reduces the normal force of the front wheels correspondingly so that their driving force is reduced.
  • the control device 24 control the lifting cylinders 15 so that they raise the work tool when the horizontal force sensed by the sensor 23 increases and lower the work tool when the horizontal force decreases, one will get a fast automatic adjustment that maintains or increases the total normal force of the wheels against the ground and thereby their driving force.
  • control device 24 can solely consist of a control valve in the hydraulic system of the machine, controlled by the sensor 23, but it can also comprise a processor or a complete computer. Then, one can have various boundary conditions in the programs for various work. However, the basic idea is still that one should directly or indirectly sense the horizontal force and use this information to control the height adjustment of the work tool.
  • the set value of the controlling horizontal force should also be adjustable.
  • the vertical force on the work tool increases, for example by increased filling of a scoop
  • this increased burden will statically load the front wheels.
  • the horizontal resistance will simultaneously increase and the driver will open the throttle in order to maintain the forward movement.
  • the driving force will always give a moment that will lift the front and the increasing driving force will increase this moment and, as a result, the rear wheels will also have an increased normal force to the ground.
  • the load in the scoop will be used to effectively increase the driving force of the tractor.
  • the invention will give the same optimum distribution of the driving force also for other types of work than loading.
  • the invention can be utilised on machines on crawlers, for example pisting machines. Then the front wheels, that is, the front driving means against the ground, correspond to the front portion of the crawlers, and the rear wheels, that is, the rear driving means against the ground, correspond to the rear portion of the crawlers.
  • the cutters should have an angle of attack obliquely downwards/forwards so that they will be subjected to a downward force during the cutting. Then both the load of ice in the scoop and the dynamic force on the ice cutters will result in an increased driving ability of the drive wheels. A machine that utilises the invention will therefore have as great a capacity as a a much heavier machine that does not utilise the invention.
  • the work tool When not utilising the invention during grading of a road, the work tool will make a depression when the front wheels reaches a depression. When the front wheels then reaches the new depression, the work tool will make another depression and so on.
  • the invention will avoid such a repetition and the invention will result in a better result of the grading.
  • the invention will also compensate for the spring action of the rubber tires. Also in a grading operation the weight of a load in the work tool will increase the driving ability in the way described and a machine with a low weight can therefore do the same work as a heavier conventional machine.
  • an active control of the invention may be of value only for certain parts of the work.
  • the active control When loading bulk material for example, the active control may be applied only when a pre-defined resistance to penetration is reached and the operator starts to tilt the scoop upwards. The operator need then only control the tilting. The lifting will be automatically controlled when the invention is applied and the degree of fullness of the scoop will be good.
  • the essential advantage is that the driving force increases and is optimally distributed between the pairs of wheels, which is the basis for a good filing of the scoop.
  • the invention can also advantageously be applied to fully automated machines without a driver.

Landscapes

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

Abstract

L'invention concerne un véhicule utilitaire sous forme d'engin d'entrepreneur avec deux paires de roues motrices, qui comporte son propre outil de travail (11), par exemple un auget ou une lame, en face de la paire de roues avant (12). Un détecteur (23) détecte la force horizontale sur l'outil de travail et un dispositif de commande (24) est accouplé au détecteur pour piloter les vérins (15) pour les bras de levage (14) de sorte que lesdits vérins de levage (15) soulèvent l'outil de travail lorsque la force horizontale augmente et l'abaissent lorsque la force horizontale diminue, ce qui augmente la force motrice.
PCT/SE2000/002048 1999-04-23 2000-10-20 Vehicule comportant un outil de travail dans lequel les elements de commande sont accouples a l'outil de travail pour ajuster l'elevation de l'outil de travail Ceased WO2002033179A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9901455A SE9901455L (sv) 1999-04-23 1999-04-23 Metod för fördelning av last mellan arbetsredskap och hjul för entreprenadmaskiner
AU2001211850A AU2001211850A1 (en) 2000-10-20 2000-10-20 A vehicle with a work tool in which power means is coupled to the work tool for adjusting the elevation of the work tool
PCT/SE2000/002048 WO2002033179A1 (fr) 1999-04-23 2000-10-20 Vehicule comportant un outil de travail dans lequel les elements de commande sont accouples a l'outil de travail pour ajuster l'elevation de l'outil de travail

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9901455A SE9901455L (sv) 1999-04-23 1999-04-23 Metod för fördelning av last mellan arbetsredskap och hjul för entreprenadmaskiner
PCT/SE2000/002048 WO2002033179A1 (fr) 1999-04-23 2000-10-20 Vehicule comportant un outil de travail dans lequel les elements de commande sont accouples a l'outil de travail pour ajuster l'elevation de l'outil de travail

Publications (1)

Publication Number Publication Date
WO2002033179A1 true WO2002033179A1 (fr) 2002-04-25

Family

ID=26655128

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2000/002048 Ceased WO2002033179A1 (fr) 1999-04-23 2000-10-20 Vehicule comportant un outil de travail dans lequel les elements de commande sont accouples a l'outil de travail pour ajuster l'elevation de l'outil de travail

Country Status (2)

Country Link
SE (1) SE9901455L (fr)
WO (1) WO2002033179A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009015443A1 (fr) * 2007-07-30 2009-02-05 Catford, David Remorque de transport de charge à système de retenue de charge rotatif

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031966A (en) * 1976-06-21 1977-06-28 Frink Sno-Plows Operating and shock cylinder assembly for vehicle underbody scrapers and the like
US5620053A (en) * 1994-01-28 1997-04-15 Komatsu, Ltd. Blade apparatus and its control method in bulldozer
US5921010A (en) * 1997-02-12 1999-07-13 Little Falls Machine, Inc. Flow blade operating system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031966A (en) * 1976-06-21 1977-06-28 Frink Sno-Plows Operating and shock cylinder assembly for vehicle underbody scrapers and the like
US5620053A (en) * 1994-01-28 1997-04-15 Komatsu, Ltd. Blade apparatus and its control method in bulldozer
US5921010A (en) * 1997-02-12 1999-07-13 Little Falls Machine, Inc. Flow blade operating system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009015443A1 (fr) * 2007-07-30 2009-02-05 Catford, David Remorque de transport de charge à système de retenue de charge rotatif

Also Published As

Publication number Publication date
SE9901455L (sv) 2000-10-24
SE9901455D0 (sv) 1999-04-23

Similar Documents

Publication Publication Date Title
US10975543B2 (en) Stand-on or walk-behind utility loader with variable length lift arm assembly
CN102713083B (zh) 轴距可变的机动平地机
US4859130A (en) Material handling attachment for a tractor having a multiple-point hitch assembly
US6132163A (en) Boom arm linkage mechanism
EP2558312B1 (fr) Dispositif de régulation, dispositif de roues de voie ferrée, machine de travail ainsi que procédé d'entraînement d'une machine de travail à roues en caoutchouc le long d'une voie ferrée
EP1597954A1 (fr) Appareil à traction améliorée pour une tondeuse à gazon
US6382873B1 (en) Soil levelling device
US20030175105A1 (en) Easy maintenance and/or service utility vehicle with extendable utility boom
US6293354B1 (en) Disc unit
US3978597A (en) Draft sensing elevating scraper with automatic elevator speed control
WO2002033179A1 (fr) Vehicule comportant un outil de travail dans lequel les elements de commande sont accouples a l'outil de travail pour ajuster l'elevation de l'outil de travail
US4614240A (en) Multi-blade soil handling apparatus
US4930582A (en) Road grader attachment
US6276077B1 (en) Tiltable bucket, wheel tractor scraper
EP3401158B1 (fr) Véhicule à benne
JPH07289003A (ja) 牽引型溝切装置
JPH1056813A (ja) 作業車両の昇降装置
JP3632779B2 (ja) 移動農機
EP1759894B1 (fr) Tracteur à suspension avant
CA2255189C (fr) Porte-disques
GB2051703A (en) Articulated height adjustable vehicle
JP3578861B2 (ja) 耕耘ロータリ作業機
JPH08280207A (ja) 移動農機
JP3511081B2 (ja) 移植機
CA2489686A1 (fr) Vehicule de transport avec espace longitudinal de chargement s'etendant sur toute la longueur du vehicule

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 BY BZ CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OFF LOSS OF RIGHTS PURSUANT TO RULE 69(1) EPC

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP