SE466859B

SE466859B - Control mechanism for a scraper blade used in ground- levelling work

Info

Publication number: SE466859B
Application number: SE9101780A
Authority: SE
Inventors: A Turpeinen
Original assignee: Koillismaan Hitsauspalvelu Ay
Priority date: 1989-11-17
Filing date: 1991-06-12
Publication date: 1992-04-13
Also published as: SE9101780L; FI895498A0; SE9101780D0; WO1991007547A1; AU6638790A; FI83353C; FI83353B

Abstract

The present invention concerns a control mechanism for a scraper blade, which is to be secured under a vehicle, the said mechanism comprising means for rotating the blade 6 in a horizontal plane so that the lateral direction of the blade forms a specific angle to the drive direction, and means for turning the blade 6 in a vertical plane, parallel to the blade. The said means comprise a first attachment point 5 arranged in such a way that it can move in the horizontal plane in order to effect the said rotation of the blade. At this point the blade 6 is arranged in such a way that it can move in a vertical plane parallel to the lateral direction of the blade in order to effect the said inclination of the blade. The means also comprise a second attachment point 7 which is arranged in such a way that it can move in a plane which is at right angles to the lateral direction of the blade, preferably at one end of a pivot arm 8 which is pivotably mounted on the chassis 1, so that the movement of the second attachment point 7 generates both the inclination of the blade in the lateral direction and the rotation of the blade in relation to the drive direction. <IMAGE>

Description

466 859 Dessa apparater har flera nackdelar. De är tunga och de har en komplicerad konstruktion till följd av att de be- står av flera inställbara delar. 466 859 These devices have several disadvantages. They are heavy and they have a complicated construction due to the fact that they consist of several adjustable parts.

Ett syfte med föreliggande uppfinning är att avhjälpades- sa nackdelar och föreslå en kontrollmekanism med en enkla- re och lättare konstruktion, som är lättare att använda.An object of the present invention is to remedy disadvantages and propose a control mechanism with a simpler and lighter construction, which is easier to use.

Dessa syften kan uppnås enligt uppfinningen genom en me- - kanism, som har de nya kännetecken, som framgår av patent- kravets 1 kännetecknande.del. Genom bladets båda monte- ringspunkters rörelser, vilka punkter är placerade påav- stånd från varandra, längs vägar kan enligt uppfinningen såväl bladets lutning som bladets riktning i förhållande; till körriktningen kontrolleras medelst ett och samma in- ställningsdon och följaktligen är kontrollmekanismen myc- ket enklare än kontrollmekanismerna enligt de båda ovan beskrivna förslagen.These objects can be achieved according to the invention by a mechanism which has the new features which appear from the characterizing part of claim 1. According to the invention, through the movements of the two mounting points of the blade, which points are placed at a distance from each other, along roads, both the inclination of the blade and the direction of the blade can be in relation; to the direction of travel is controlled by means of one and the same adjusting device and consequently the control mechanism is much simpler than the control mechanisms according to the two proposals described above.

Några fördelaktiga konstruktionsmässiga egenskaper hos me- kanismen enligt uppfinningen anges i de bifogade under- kraven, vilka förenklar konstruktionen och förbättrar dess funktionella egenskaper.Some advantageous structural properties of the mechanism according to the invention are stated in the appended subclaims, which simplify the construction and improve its functional properties.

Föreliggande uppfinning skall nu beskrivas mer i detalj, med hänvisning till de bifogade ritningarna; vari: Fig. 1 är en sidovy av mekanismen; Fig. 2 är en sidovy av mekanismen sedd från den andra si- dan; och Fig. 3 är en vy av mekanismen sedd mot bladets baksida.The present invention will now be described in more detail, with reference to the accompanying drawings; wherein: Fig. 1 is a side view of the mechanism; Fig. 2 is a side view of the mechanism seen from the other side; and Fig. 3 is a view of the mechanism seen towards the back of the blade.

Skrapbladet 6 och dess kontrollmekanismﬁ är fastsattaun- der fordonet mot chassisbalken 1, t.ex. medelst en platta 3, i vilken bladet hänger. Bultförband används t.ex. för fastsättningen och avlägsnandet av plattan 3.The scraper blade 6 and its control mechanism ﬁ are attached under the vehicle to the chassis beam 1, e.g. by means of a plate 3, in which the blade hangs. Bolt joints are used e.g. for the attachment and removal of the plate 3.

Skrapbladet och dess kontrollmekanism omfattar ett blad, som liknar ett bulldozerblad och är försett med ett för- 3 466 859 längningsblad 13, som i- och för sig .till- hör känd teknik och kan manövreras medelst en hydraulisk cylinder 12, samt två hydrauliska cylindrar 2 och 10. Me- kanismen omfattar också en pendelskruv 8 och en vertikal skruvlänk 4, vilka delar kan förlängas och är försedda med länkar, som möjliggör rotationen i riktningar, som behövs för bladets arbete och som utgör bladets upphäng- ningsmedel. Den nedre änden på den vertikala skruvlän- kens 4 roterbara pinne bildar en vinkel, som utgör en hävarm ll, som kan roteras enbart runt den vertikalaskruv- länkens 4 axel,och är fast förenad med bladet i det hori- sontella planet. Bladet 6 är fastsatt vid hävarmen ll me- delst en korslänk 5, så att bladet kan vridas bakåt eller framåt i förhållande till korslänken och bladet kan vri- das i det vertikala planet, så att bladets lutning kan inställas, samtidigt som det är fast monterat i det ho- risontella planet, såsom nämndes ovan.The scraper blade and its control mechanism comprise a blade, which is similar to a bulldozer blade and is provided with an extension blade 13, which per se belongs to the prior art and can be operated by means of a hydraulic cylinder 12, and two hydraulic cylinders 2 and 10. The mechanism also comprises a pendulum screw 8 and a vertical screw link 4, which parts can be extended and are provided with links which enable the rotation in directions needed for the work of the blade and which constitute the suspension means of the blade. The lower end of the rotatable pin of the vertical screw link 4 forms an angle which forms a lever II, which can be rotated only around the axis of the vertical screw link 4, and is fixedly connected to the blade in the horizontal plane. The blade 6 is attached to the lever 11 by means of a cross link 5, so that the blade can be rotated backwards or forwards in relation to the cross link and the blade can be rotated in the vertical plane, so that the inclination of the blade can be adjusted, while it is fixedly mounted in the horizontal plane, as mentioned above.

Den andra monteringspunkten 7 består av en korslänk, an-* ordnad vid änden på pendelskruven, som fungerar som en svängarm 8. Genom korslänken 7 kan bladet vridas bakåt och framåt på samma sätt som i korslänken 5. Ett manöver- don 10 med ett utsträckbart och indragbart don, t.ex. en hydraulisk cylinder, som kontrolleras från förarens hytt är fastsatt vid chassit vid sin ena ände och vid sväng- armen 8 vid sin andra ände medelst kulleder.The second mounting point 7 consists of a cross link, arranged at the end of the pendulum screw, which acts as a pivot arm 8. Through the cross link 7 the blade can be turned backwards and forwards in the same way as in the cross link 5. An actuator 10 with an extensible and retractable device, e.g. a hydraulic cylinder, which is controlled from the driver's cab, is attached to the chassis at one end and to the swingarm 8 at its other end by means of ball joints.

Rörelseplanet för den andra monteringspunkten 7 och för den första monteringspunkten 5 bildar en spetsig vinkel, dvs svängarmens 8 svängningslinje (streckad linje i fig. 3) bildar en vinkel med hävarmens ll svängningslinje (dvs den vertikala skruvlänkens 4 axel, som också visas i fig. 3). Detta har förverkligats i ett praktiskt fall på så sätt, att svängarmen 8, vid sin övre ände, hänger i en ledtapp, vars axel bildar en lämplig vinkel medden vertikala skruvlänkens 4 axel, så att den kombinerade funktionen hos svängarmen 8, den vertikala skruvlänken 4 och hävarmen ll på densamma gör det möjligt att föra in bladet i ett önskat läge medelst den hydrauliska cylin- dern 10, så att skrapningen av vägen resulterar i enöns- kad lutning hos vägbanan och så att under fordonets rörel- se ytmaterialets förflyttning till vägens sida eller ut på vägen kan kontrolleras på ett inställbart sätt genom ett kontrollsystem placerat i förarhytten.The plane of movement of the second mounting point 7 and of the first mounting point 5 forms an acute angle, i.e. the pivot line of the pivot arm 8 (dashed line in Fig. 3) forms an angle with the pivot line of the lever 11 (ie the axis of the vertical screw 4, also shown in Figs. 3). This has been realized in a practical case in such a way that the pivot 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 link 4, so that the combined function of the pivot arm 8, the vertical screw link 4 and the lever 11 on it makes it possible to insert the blade in a desired position by means of the hydraulic cylinder 10, so that the scraping of the road results in an desired inclination of the road surface and so that during the movement of the vehicle the surface material moves to the side of the road or out on the road can be controlled in an adjustable way by a control system located in the cab.

En hydraulisk lutningscylinder 2 är vid sin andra ände svängbart monterad vid bladets baksida vid samma ställe, i bladets sidoriktning, som den första monteringspunkten 5. Vid detta ställe ligger cylindern ungefär i samma ver- tikala plan som hävarmen ll. Cylinderns 2 andra ände är svängbart monterad vid chassit. Bladets lutning i ett vertikalt plan, vinkelrätt mot bladets sidoriktning, kan inställas medelst cylindern 2.A hydraulic inclined cylinder 2 is pivotally mounted at its other end at the rear of the blade at the same point, in the lateral direction of the blade, as the first mounting point 5. At this point the cylinder lies in approximately the same vertical plane as the lever II. 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 by means of the cylinder 2.

Fig. 1 visar också, hur en tryckackumulator 14, försedd med en tryckregleringsventil 15, är förenad med cylin- derns 2 trycksida. Tryckackumulatorn 14 fungerar, om en överbelastning uppkommer, t.ex. om bladet stöter mot en sten, så att det hydrauliska trycket överskrider tryck- regleringsventilens 15 inställda tryckgräns. Ventilen 15 öppnas i så fall och den hydrauliska vätskan töms ut i tryckackumulatorn 14, tills bladet har vridits så mycket, att det kan passera hindret; När hindret har passerats, återvänder den hydrauliska vätskan via reducerventilen 16 och leds förbi regleringsventilen 15 och då kommerbla- det, till följd av vätskans övertryck i ackumulatorn, att återvända till sitt ursprungliga läge, så att arbe- tet kan fortsätta utan avbrott.i Bladets läge kan inställas på så sätt, att vägens ytma- terial kan förflyttas antingen åt vägens sida eller åt vägens mittendel.Fig. 1 also shows how a pressure accumulator 14, provided with a pressure control valve 15, is connected to the pressure side of the cylinder 2. The pressure accumulator 14 operates, if an overload occurs, e.g. if the blade strikes a rock so that the hydraulic pressure exceeds the set pressure limit of the pressure control valve 15. The valve 15 is then opened and the hydraulic fluid is discharged into the pressure accumulator 14 until the blade has been rotated so much that it can pass the obstacle; When the obstacle has been passed, the hydraulic fluid returns via the reducer valve 16 and is led past the control valve 15 and then the blade, due to the overpressure of the fluid in the accumulator, will return to its original position, so that the work can continue without interruption. position can be adjusted in such a way that the surface material of the road can be moved either to the side of the road or to the middle part of the road.

Svängarmens 8 och den vertikala skruvlänkens 4 längder kan inställas, innan fordonet börjar förflytta sig, var- vid man använder känd teknik för att inställa mekanis-The lengths of the swingarm 8 and the vertical screw link 4 can be adjusted before the vehicle begins to move, using known technology to set the mechanism.

Claims

46-6 859 but, which includes the blade, in the desired position relative to the chassis. As adjustable screws, so-called rigging screws can be used, so that the adjustment can be carried out from the side. Patent claims

A control mechanism for a scraper blade, which can be attached to a vehicle for use in leveling work, 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 direction of travel. , and means for rotating the blade (6) in a vertical plane parallel to the blade, i.e. an inclination of the lateral direction of the blade, so that it forms a desired angle in relation to a horizontal plane, comprises 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), spaced from the first support point (5), in which the blade also hangs from the vehicle chassis, characterized in that the first mounting point (5) is arranged so that it can be rotated in the horizontal plane to achieve that the blade rotates and that the blade (6) is arranged so that it is movable in the point of the first mounting point (5), in a vertical plane, 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 so that it can move in a plane perpendicular to the lateral direction of the blade, preferably at the end of a pivot arm (8), which arm is pivotally mounted on the chassis (1), so that the movement of said second support point (7) results in both the inclination of the blade in the lateral direction and the rotation of the blade relative to the direction of travel.

Mechanism according to claim 1, characterized in that it comprises an extensible and retractable, preferably hydraulically driven device (10), which at its other end is attached to the chassis (1) and which is arranged so that it can effect the said rotational and inclined movement and which can be extended and retracted from the cab.

Mechanism according to claim 2, characterized in that the device (10) is attached at its other end to the pivot arm (8), which carries the second mounting point I

Mechanism 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 one end of an arm (11), which arm is pivotally attached to the chassis' (1) by means of a vertical link (4), and a second mounting point (7) is arranged in such a way that it can move at one end of the pivot arm (8) in a plane which inclined in relation to said horizontal plane.

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, so that a desired constant distance and length is obtained during the movement of the vehicle.

Mechanism 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 moved in the lateral direction of the blade (6). I 'J