EP0093745A1

EP0093745A1 - Root crop harvester

Info

Publication number: EP0093745A1
Application number: EP82903311A
Authority: EP
Inventors: Henning Norlyk
Original assignee: HA Norlyk and Soenner AS
Current assignee: HA Norlyk and Soenner AS
Priority date: 1981-11-18
Filing date: 1982-11-18
Publication date: 1983-11-16
Also published as: WO1983001723A1; GB2121265A; GB2121265B; DK147091B; DK147091C; SE8303944D0; GB8318716D0; DE3249188T1; SE8303944L; DK510181A

Abstract

On obtient un nettoyage efficace des betteraves (8), sans risque d'obstruction provoquée par des pierres, en montant quatre rouleaux dans une moissonneuse mobile de plantes sarclées, et en faisant tourner ces rouleaux dans la même direction de rotation avec des essieux horizontaux, en réalisant le premier (17) et le troisième (19) rouleaux au moyen de disques adjacents (22) pourvus d'éléments en saillie (24) en caoutchouc montés sur un axe, tandis que le deuxième (18) et le quatrième (20) rouleaux sont formés par des cylindres métalliques dont les surfaces sont pourvues d'un support en forme de spirale.An efficient cleaning of the beets (8), without risk of blockage caused by stones, is obtained by mounting four rollers in a mobile weed harvester, and by turning these rollers in the same direction of rotation with horizontal axles, by making the first (17) and the third (19) rollers by means of adjacent discs (22) provided with protruding elements (24) of rubber mounted on an axle, while the second (18) and the fourth (20 ) rollers are formed by metal cylinders whose surfaces are provided with a support in the form of a spiral.

Description

ROOT CROP HARVESTER

This invention relates to a root crop harvester com¬ prising elements for the topping, lifting and σlean- ing of the root crops, and for the transport of such crops to a tank.

When harvesting root crops it is important that the lifting is carried out efficiently and carefully, and that soil is removed from the crops as effect¬ ively as possible before they are transported to a storage tank. This cleaning of the crops is difficult because there can be larger or smaller stones be¬ tween the crops. Such stones must be separated to- gether with the soil, and this can be effected only if one or more of the rollers are provided with a suitably flexible arrangement for separation of the rollers in the cleaning elements. This naturally has an adverse effect on the cleaning ability and, more- over, it can give rise to the loss of root crops.

Normally used for the cleaning are rollers arranged in pairs and having worm-gear-formed carriers on their top surface. These rollers run in opposite directions of rotation, whereby a cleaning of the root crops is effected when these come into contact with the rollers. This means that the stones can become jammed fast between the rollers and cause stone stoppage or the loss of root crops, in that these together with the stones will fall down be¬ tween the rollers. If several pairs of such rollers with opposite directions of rotation are arranged at the side of one another, no cleaning whatsoever will occur in the space between two upwardly-moving rol- ler parts .

It is the object of this invention to remedy these shortcomings of the hitherto-known root crop harvest- ers, and this is achieved in that the cleaning and transporting elements are mounted immediately behind the lifting elements and consist of a first roller, a second roller, a third roller and a fourth roller, and in that the first and third rollers each consist of a through-going shaft mounted with adjacent discs having flexible projections, and where the second and the fourth rollers each consist of a cylinder with a worm-gear-formed carrier on its surface, said rol¬ lers all rotating in the same direction around utua- lly parallel axes and with the surfaces lying succes¬ sively up to one another.

There is hereby achieved an unusually great cleaning ; ability, in that the soil will be taken up in the spaces between the rubber discs and the projections on the individual disc^'s top side, and from these - rollers will fall down and out when the rollers are turned. Soil on the rollers with carriers will be turned with the roller across the projections on the preceding roller where it will be swept off. More¬ over, the elements will be insensitive to stones, the reason being that small stones will be pressed in be¬ tween the flexible projections while the larger stones will be carried with the root crops over oh the next roller and from here further.

By extending the one roller, as presented in claim 2, a transverse transport can be effected to a conveyor positioned up to the projecting part of the roller. This saves a further transport arrangement.

By letting the projections be uniformly distributed on the discs, as presented in claim 3, an even sweep- ing of the remaining rollers and herewith an effect¬ ive cleaning is achieved.

By letting the projections be narrower than the disc, as presented in claim 4, plenty of room is provided for the soil and small stones between the individual disc^'s projections.

• Finally, it is expedient, as presented in claim 5, to have an angular displacement between the projec- tions of adjacent discs, since this increases the cleaning ability of the rollers without any adverse effect on the taking up of the soil or stones.

The invention will now be described in closer detail with reference to the accompanying drawings, where

fig. 1 shows a root crop harvester seen from the side,

fig. 2 shows the root crop harvester seen from above,

fig. 3 shows the root crop harvester seen from the front,

fig. 4 shows a disc with projections seen from the end, and

fig. 5 shows a section through the disc seen

O P in the direction V-V in fig. 4.

In figs. 1-3 is shown an embodiment of a root crop harvester seen during the lifting of beet. The har- vester is mounted on a main frame 2 which is provi¬ ded with a pair of drive wheels 6. It has a drawbar 7 which can be secured to a tractor (not shown) .

The lifting unit itself is mounted on a frame 22 (see fig. 2) which is adjustable in height. It com¬ prises a front-lying topping element consisting of almost vertical drums around which rotates a band having a number of knives 10 mounted at the bottom. These knives cut the top 9 off the beet. Behind the topping knives there is a so-called rubber swingle and thereafter a pivotably mounted trimmer 14 having an underlying feeler 12 and a rearward-lying knife 13 which cleanly trims the top of the beet.

Hereafter follows the lifting arrangement, and this comprises a number of mutually obliquely-mounted plucking wheels 15 which clamp around the beet and while rotating lift the beet free of the soil. A rubber flapper 16 -ensures that the beet is fed over on to the first roller 17.

This roller is built up of discs 22, which are shown in figs. 4 and 5. Each disc is provided with a cen¬ tral square hole 23 which fits a square shaft. The projections 24 are in the form of teeth and are arranged in relation to the hole 23 in such a way that a turn of every other disc on the shaft results in. the projections being offset a projection's breadth. In this way the projections are placed completely

OMPI uniformly on the roller and on the surface of same. It can be of advantage for the discs and the projec¬ tions to be manufactured of rubber or some other • flexible material. ^'

After this rubber roller 17 there is arranged a me¬ tal roller 18, the surface of which is provided with a worm conveyor in the form^' of a spiral carrier rib.

Disposed hereafter is a further rubber roller 19 which, in its construction, corresponds to the first roller 17. Over the rearmost part of the roller 19 there is mounted a further metal roller 20 having a worm conveyor. The diameter of this fourth roller is smaller than that of the metal roller 18.

All the rollers are driven in the same direction of rotation, as shown by the arrows.

As shown in fig. 2, the second roller 18 extends some distance out to the side, thus allowing a con¬ veyor 5 to be mounted which can carry the beet fur¬ ther rearwards to a chain elevator which catches the beet after it has been swept by the overlying wiper 4..Finally, the elevator 3 carries the beet up into a container 1 which, by suitable means, can be made to tip when its contents are to be emptied.

A suitable grating 21 ensures that the beet remains on the roller 18 during its transverse movement to the conveyor 5.

Claims

C L A I M S

1. Root crop harvester comprising elements for the topping, lifting and cleaning of the root crops, and for the transport of such crops to a container, c h a r a c t e r i z e d in that the cleaning and

5 transporting elements are mounted immediately be¬ hind the lifting elements (15,16) and consist of a first roller (17) , a second roller (18) , a third roller (19) and a fourth roller (20) , and in that the first and third rollers (17 and 19) each comprise 0 a through-rgoing axle mounted with adjacent discs (22) with flexible projections (24) , and where the second and the fourth rollers (18 and 20) each consist of a cylinder with a spiral-formed carrier on its sur¬ face, all of said rollers (17, 18, 19 and 20) being 5 rotated in the same direction around mutually paral¬ lel axes and having their surfaces lying successively up to one .another.

2. Root crop harvester according to claim 1, 0 c h a r a c t e r i z e d in that at least the sec¬ ond roller (18) is extended for transverse transport.

3. Root crop harvester according to claim 1, c h a r a c t e r i z e d in that the projections 5 (24) are evenly distributed on the disc (22) .

4. Root crop harvester according to claim 1, c h a r a c t e r i z e d in that the disc (22) has a thickness which is about three times the thickness ^Q of the projections (24) .

5. Root crop harvester according to claims 3 and 4, c h a r a c t e r i z e d in that the disc (22) is provided with a square hole (23) which is so posi¬ tioned in relation to the projections (24) that the projections can be placed on a square axle with a projection opposite the spaces between the projec¬ tions on the adjacent discs.