NO175439B

NO175439B - Control device for a cutting or plow blade for use in field planning work

Info

Publication number: NO175439B
Application number: NO912679A
Authority: NO
Inventors: Ari Turpeinen
Original assignee: Koillismaan Hitsauspalvelu Ay
Priority date: 1989-11-17
Filing date: 1991-07-09
Publication date: 1994-07-04
Also published as: NO912679L; NO175439C; NO912679D0

Description

Foreliggende oppfinnelse angår en kontrollanordning for et skjær- eller plogblad som kan settes på et kjøretøy og anvendes ved markplanering. Oppfinnelsen angår spesielt et skjær- eller plogblad som monteres under et kjøretøy på chassisbjelkene for å benyttes ved veiplanering og annet veivedlikeholdsarbeid. Denne type av plogblad utgjør et alternativ til de tyngre arbeidsredskaper som anvendes ved slikt arbeid (som slepskrape, riving etc). Bladet må videre kunne innstilles når kjøretøyet er i bevegelse, slik at vinkelen mellom bladets sideretning og kjøreretningen kan endres, og slik at overflatematerialet kan forflyttes enten mot veikanten eller mot veiens midtre del. Dessuten må bladet kunne skråes i et vertikalt plan i forhold til kjøre-retningen, slik at bladet kan innstilles med hensyn på mark-overflatens helning, eller slik at markoverflaten kan få en ønsket helning. Kontrollmekanismen for denne type plogblad er beskrevet f.eks. i US-patent nr. 4.258.797 og FI-patent nr. 58.378. Førstnevnte angår et plogblad under et kjøretøy, hvorved vinkelen mellom bladets sideretning og bevegelses-retning kan innstilles ved hjelp av en hydraulisk sylinder, og dessuten kan helningsvinkelen innstilles ved hjelp av en annen hydraulisk sylinder. Plogbladet er bevegelig festet ved kjøretøyets understell til et horisontalt vriskive-aggregat. Mekanismen omfatter to separate hydrauliske enheter som skal kontrolleres for å stille inn bladet. The present invention relates to a control device for a cutting or plow blade which can be mounted on a vehicle and used for land planning. The invention relates in particular to a cutting or plow blade which is mounted under a vehicle on the chassis beams for use in road planning and other road maintenance work. This type of plow blade is an alternative to the heavier work tools used for such work (such as tow scraper, demolition etc.). The blade must also be able to be adjusted when the vehicle is in motion, so that the angle between the side direction of the blade and the direction of travel can be changed, and so that the surface material can be moved either towards the edge of the road or towards the middle part of the road. In addition, the blade must be able to be tilted in a vertical plane in relation to the direction of travel, so that the blade can be adjusted with regard to the slope of the field surface, or so that the field surface can have a desired slope. The control mechanism for this type of plow blade is described e.g. in US Patent No. 4,258,797 and FI Patent No. 58,378. The former relates to a plow blade under a vehicle, whereby the angle between the blade's lateral direction and direction of movement can be set with the help of a hydraulic cylinder, and furthermore the angle of inclination can be set with the help of another hydraulic cylinder. The plow blade is movably attached to the vehicle's undercarriage to a horizontal turning disc assembly. The mechanism includes two separate hydraulic units that must be controlled to set the blade.

FI-patentet angår en veihøvel, med hvilken bladets helning i forhold til kjøreretningen kan innstilles gjennom å endre på to hydraulisk manøvrerbare teleskopiske armers lengde. Apparatet er dessuten utstyrt med to hydrauliske sylindere på kjøretøyets begge sider for å løfte og senke bladet. Også i dette tilfelle må man, for å kunne innstille bladets leie, anvende minst to hydraulisk innstillbare armer. The FI patent relates to a grader, with which the blade's inclination in relation to the direction of travel can be adjusted by changing the length of two hydraulically maneuverable telescopic arms. The device is also equipped with two hydraulic cylinders on both sides of the vehicle to raise and lower the blade. In this case too, to be able to adjust the bearing of the blade, at least two hydraulically adjustable arms must be used.

Disse apparater har flere ulemper. De er tunge og har en komplisert konstruksjon i tillegg til at de består av flere innstillbare deler. These devices have several disadvantages. They are heavy and have a complicated construction, in addition to the fact that they consist of several adjustable parts.

En hensikt med foreliggende oppfinnelse er å avhjelpe disse ulemper og å foreslå en kontrollanordning med en enklere og lettere konstruksjon og som er lettere å bruke. Denne hensikten kan oppnås ifølge oppfinnelsen gjennom en mekanisme som har de nye kjennetegnene som fremgår av den karakteriserende del av patentkrav 1. Gjennom bladets begge monteringspunkters bevegelighet, hvilke punkter er plassert i avstand fra hverandre, kan, ifølge oppfinnelsen, såvel bladets helning som bladets retning i forhold til kjøre-retningen kontrolleres ved hjelp av en og samme innstillings-anordning, og følgelig er kontrollmekanismen mye enklere enn kontrollmekanismen ifølge de to ovenfor beskrevne løsninger. One purpose of the present invention is to remedy these disadvantages and to propose a control device with a simpler and lighter construction and which is easier to use. This purpose can be achieved according to the invention through a mechanism which has the new characteristics that appear in the characterizing part of patent claim 1. Through the movement of both mounting points of the blade, which points are placed at a distance from each other, according to the invention, both the inclination of the blade and the direction of the blade can in relation to the direction of travel is controlled by means of one and the same setting device, and consequently the control mechanism is much simpler than the control mechanism according to the two solutions described above.

Noen fordelaktige konstruksjonsmessige egenskaper hos mekanismen ifølge oppfinnelsen angis i de vedlagte underkrav, hvilke angir den forenklede konstruksjon og dens forbedrede funksjonelle egenskaper. Some advantageous constructional properties of the mechanism according to the invention are stated in the attached sub-claims, which state the simplified construction and its improved functional properties.

Foreliggende oppfinnelse skal nå beskrives mer i detalj under henvisning til de vedlagte tegninger, hvor: The present invention will now be described in more detail with reference to the attached drawings, where:

fig. 1 er et sideriss av mekanismen, fig. 1 is a side view of the mechanism,

fig. 2 er et sideriss av mekanismen sett fra den andre fig. 2 is a side view of the mechanism seen from the other

siden, og since, and

fig. 3 er et riss sett fra plogbladets bakside. fig. 3 is a view seen from the back of the plow blade.

Plogbladet 6 og dets kontrollanordning er satt fast under kjøretøyet til chassisbjelken 1, f.eks. ved hjelp av en plate 3, i hvilken bladet er opphengt. Bolteforbindelse anvendes f.eks. for fastsetting og fjerning av platen 3. The plow blade 6 and its control device are fixed under the vehicle to the chassis beam 1, e.g. by means of a plate 3, in which the blade is suspended. Bolted connection is used e.g. for fixing and removing the plate 3.

Plogbladet 6 og dets kontrollmekanisme omfatter et blad som ligner et bulldoserblad og er utstyrt med et forlengelsesblad 13 som i og for seg tilhører kjent teknikk og kan manøvreres ved hjelp av en hydraulisk sylinder 12 samt to hydrauliske sylindre 2 og 10. Mekanismen omfatter også en pendelarm 8 og et vertikalt skrueledd 4, som kan forlenges og er utstyrt med ledd som muliggjør rotasjonen i retninger som er nødvendig for bladets arbeid og som utgjør bladets opp-hengsanordning. Den nedre enden på det vertikale skrueleddets 4 roterbare arm, utformet i vinkel, utgjør en hevearm 11, hvilken kan roteres bare rundt det vertikale skrueleddets 4 akse, og er fast tilkoblet til plogbladet 6 i det horisontale planet. Plogbladet 6 er fast tilkoblet til hevearmen 11 ved hjelp av et kryssledd 5, slik at bladet kan vries bakover eller fremover i forhold til kryssleddet, og bladet kan vries i det vertikale planet, slik at bladets helning kan innstilles samtidig som det er fast montert i det horisontale planet slik som nevnt ovenfor. The plow blade 6 and its control mechanism comprise a blade that resembles a bulldozer blade and is equipped with an extension blade 13 which per se belongs to known technology and can be maneuvered by means of a hydraulic cylinder 12 and two hydraulic cylinders 2 and 10. The mechanism also comprises a pendulum arm 8 and a vertical screw joint 4, which can be extended and is equipped with joints which enable the rotation in directions which are necessary for the blade's work and which constitute the blade's suspension device. The lower end of the rotatable arm of the vertical screw joint 4, formed at an angle, constitutes a lifting arm 11, which can be rotated only around the axis of the vertical screw joint 4, and is fixedly connected to the plow blade 6 in the horizontal plane. The plow blade 6 is firmly connected to the lifting arm 11 by means of a cross joint 5, so that the blade can be twisted backwards or forwards in relation to the cross joint, and the blade can be twisted in the vertical plane, so that the inclination of the blade can be adjusted at the same time as it is firmly mounted in the horizontal plane as mentioned above.

Det andre monteringspunktet 7 består av et kryssledd anordnet ved enden på pendelarmen 8. Gjennom kryssleddet 7 kan bladet vries bakover og fremover på samme måte som i kryssleddet 5. Et manøvreringsapparat 10 med en utstrekkbar og innskyvbar innretning, f.eks. en hydraulisk sylinder som nevnt ovenfor, som kontrolleres fra førerens hytte,. er satt fast til chassisets med sin ene ende og ved pendelarmen 8 med sin andre ende ved hjelp av et kuleledd. The second mounting point 7 consists of a cross joint arranged at the end of the pendulum arm 8. Through the cross joint 7, the blade can be twisted backwards and forwards in the same way as in the cross joint 5. A maneuvering device 10 with an extendable and retractable device, e.g. a hydraulic cylinder as mentioned above, which is controlled from the driver's cabin,. is attached to the chassis with one end and to the pendulum arm 8 with its other end by means of a ball joint.

Bevegelsesplanet for det andre monteringspunktet 7 og for det første kryssledd eller monteringspunkt 5, danner en spiss vinkel, dvs. pendelarmens 8 svingelinje (stiplet linje i figur 3) danner en vinkel med hevearmens 11 svinglinje (dvs. det vertikale skrueleddets 4 akse, som også er vist i figur 3). Dette blir anskueliggjort i praksis på den måten at pendelarmen 8, i sin øvre ende, henger i en leddtapp, hvor aksen danner en passende vinkel med det vertikale skrueleddets 4 akse, slik at den kombinerte funksjonen hos pendelarmen 8, det vertikale skrueleddet 4 og hevearmen 11 samtidig gjør det mulig å føre inn bladet i en ønsket posisjon ved hjelp av den hydrauliske sylinderen 10, slik at skrapningen av veien resulterer i en ønsket helning på veibanen og slik at det, under kjøretøyets bevegelse, kan kontrolleres om overflatematerialet på veibanen skal forflyttes til veiens side eller ut på veien, ved innstilling gjennom et kontroll-system som er plassert i førerhytten. The plane of movement of the second mounting point 7 and of the first cross joint or mounting point 5 forms an acute angle, i.e. the swing line of the pendulum arm 8 (dashed line in figure 3) forms an angle with the swing line of the lifting arm 11 (i.e. the axis of the vertical screw joint 4, which also is shown in Figure 3). This is visualized in practice in the way that the pendulum arm 8, at its upper end, hangs in a pivot, the axis of which forms a suitable angle with the axis of the vertical screw joint 4, so that the combined function of the pendulum arm 8, the vertical screw joint 4 and the lifting arm 11 at the same time makes it possible to introduce the blade into a desired position by means of the hydraulic cylinder 10, so that the scraping of the road results in a desired slope on the roadway and so that, during the movement of the vehicle, it can be checked whether the surface material on the roadway is to be moved to the side of the road or onto the road, by setting through a control system located in the driver's cab.

En hydraulisk helningssylinder 2 er i sin ene ende svingbart montert ved bladets bakside på samme sted, i bladets sideretning, som det første monteringspunktet 5. På dette stedet ligger sylindrene omtrent i samme vertikale plan som hevearmen 11. Sylinderens 2 andre ende er svingbart montert til chassiset. Bladets helning i et vertikalt plan, vinkelrett på bladets sideretning, kan innstilles ved hjelp av sylinder 2. A hydraulic tilting cylinder 2 is pivotably mounted at one end at the back of the blade at the same location, in the lateral direction of the blade, as the first mounting point 5. At this location, the cylinders lie approximately in the same vertical plane as the lifting arm 11. The other end of the cylinder 2 is pivotally mounted to the chassis. The inclination of the blade in a vertical plane, perpendicular to the lateral direction of the blade, can be adjusted using cylinder 2.

Figur 1 viser også hvordan en trykkakkumulator 14, utstyrt med en trykkreguleringsventil 15, er tilkoblet sylinderens 2 trykkside. Trykkakkumulatoren 14 fungerer dersom en overbelastning oppstår, f.eks. om bladet støter mot en sten, slik at det hydrauliske trykket overskrider den i trykkregu-leringsventilen 15 innstilte trykkgrense. Ventilen 15 åpnes i dette tilfelle, og den hydrauliske væsken tømmes ut i trykkakkumulatoren 14 helt til bladet har vridd seg så mye at det kan passere hindringen. Når hindringen er passert retur-nerer den hydrauliske væsken via reduksjonsventilen 16 og ledes forbi reguleringsventilen 15, og bladet vil da som følge av væskens overtrykk i trykkakkumulatoren 14 igjen vende tilbake til sitt opprinnelige leie, slik at arbeidet kan fortsettes uten avbrudd. Figure 1 also shows how a pressure accumulator 14, equipped with a pressure control valve 15, is connected to the pressure side of the cylinder 2. The pressure accumulator 14 works if an overload occurs, e.g. if the blade hits a stone, so that the hydraulic pressure exceeds the pressure limit set in the pressure regulation valve 15. The valve 15 is opened in this case, and the hydraulic fluid is emptied into the pressure accumulator 14 until the blade has twisted so much that it can pass the obstacle. When the obstacle has been passed, the hydraulic fluid returns via the reduction valve 16 and is led past the control valve 15, and the blade will then, as a result of the excess pressure of the fluid in the pressure accumulator 14, return to its original bearing, so that the work can be continued without interruption.

Bladets leie kan innstilles på en slik måte at veiens overflatemateriale kan forflyttes enten til veiens side eller til veiens midtre del. The position of the blade can be set in such a way that the road surface material can be moved either to the side of the road or to the middle part of the road.

Pendelarmen 8 og det vertikale skrueleddets 4 lengder kan innstilles før kjøretøyet begynner å bevege seg, hvorved man anvender kjent teknikk for å stille inn mekanismen, som innbefatter bladet i det ønskede leie i forhold til chassiset. Som innstilbar skrue kan en såkalt vantskrue anvendes, slik at innstilingen kan gjennomføres fra siden. The lengths of the pendulum arm 8 and the vertical screw link 4 can be adjusted before the vehicle begins to move, whereby a known technique is used to adjust the mechanism, which includes the blade in the desired bearing in relation to the chassis. As an adjustable screw, a so-called vant screw can be used, so that the setting can be carried out from the side.

Claims

1. Control device for a cutting or plow blade, which can be attached to a vehicle for use in field planning work, comprising a device for rotating the blade (6) in a horizontal plane in relation to the vehicle, so that the lateral direction of the blade forms a specified angle with the direction of travel, as well as a device for turning the blade (6) in a vertical plane parallel to the blade, i.e. an inclination in the lateral direction of the blade so that it forms a desired angle in relation to a horizontal plane, comprising a first mounting point (5) for the blade (6), at which point the blade hangs from the vehicle chassis (1) and a second mounting point (7) located at a distance from the first mounting point (5), at which point the blade also hangs from the vehicle chassis, characterized in that the first mounting point (5) is arranged rotatably in the horizontal plane to achieve that the blade rotates, and that the blade (6) is arranged so that it is movable in a vertical plane, in the first mounting point (5), p parallel to the lateral direction of the blade and perpendicular to said horizontal plane to achieve said tilting movement of the blade, and that the second mounting point (7) is arranged to move in a plane transverse to the lateral direction of the blade, preferably at the end of a pendulum arm (8), which arm is pivotably mounted on the chassis (1) so that the movement of said second mounting point (7) results in the blade itself tilting in the lateral direction as well as the blade's rotation in relation to the direction of travel.

2. Device according to claim 1, characterized in that it comprises a pull-out and push-in, preferably hydraulically driven device (10) which is fixed at one end to the chassis (1) and is arranged so that it can produce the aforementioned rotational and tilting movement and which can be pulled out and pushed into from the vehicle's cab.

3. Device according to claim 2, characterized in that the hydraulic device (10) is fixed at its other end by the pendulum arm (8) where it carries the second mounting point (7).

4. Device according to one of the preceding claims, characterized in that the first mounting point (5) is arranged in such a way that it can move in a horizontal plane, preferably at the end of an arm (11) which is pivotally fixed to the chassis ( 1) by means of a vertical link (4), and that the second mounting point (7) is arranged movably at one end of the pendulum arm (8) in a plane which is inclined in relation to said horizontal plane.

5. Device 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 so that a desired constant distance and length is maintained during the movement of the vehicle.

6. Device according to one of the preceding 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 extended by means of an extension blade (13) which is known per se and can is carried in the lateral direction of the blade.