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Dokumentenidentifikation EP1011305 02.10.2002
EP-Veröffentlichungsnummer 1011305
Titel TRENNVORRICHTUNG UND LANDWIRTSCHAFTLICHE VERLESEMASCHINE
Anmelder Richard Pearson Ltd., Boston, Lincolnshire, GB
Erfinder WESTON, Booth, David, Lincolnshire PE22 0JZ, GB
Vertreter derzeit kein Vertreter bestellt
DE-Aktenzeichen 69807500
Vertragsstaaten AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LI, LU, MC, NL, PT, SE
Sprache des Dokument EN
EP-Anmeldetag 02.04.1998
EP-Aktenzeichen 989149596
WO-Anmeldetag 02.04.1998
PCT-Aktenzeichen PCT/GB98/00973
WO-Veröffentlichungsnummer 0098043471
WO-Veröffentlichungsdatum 08.10.1998
EP-Offenlegungsdatum 28.06.2000
EP date of grant 28.08.2002
Veröffentlichungstag im Patentblatt 02.10.2002
IPC-Hauptklasse A01D 17/06
IPC-Nebenklasse B07B 1/15   

Beschreibung[en]

The present invention relates to an agricultural separating device and an agricultural separator including such a device.

It is well-known in the agricultural field to use starwheels when separating materials, eg clod and/or stones from root vegetables or bulbs, eg during harvesting, in de-stoning machines and also in static cleaning or grading equipment. Starwheels have a plurality of resiliently deformable "fingers" arranged around a central hub or boss and are at present formed from polyurethane or rubber, but could be formed from any other suitable material. In use, a plurality of starwheels are mounted on a rotatable shaft, commonly known as a "starshaft".

During use, damp soil may stick to the starwheels, or hard material, eg stones, may become jammed between the starwheels. This will reduce separation and produce wear of the starwheels.

GB 2 145 612 discloses two parallel starshafts arranged upstream of a counter rotating clod roller for use in separating clod and/or stones from root vegetables or bulbs. In practice, the fingers of the starwheels of adjacent starshafts are staggered and fit into the gaps between the starwheels of the adjacent starshaft. In such a position, the starshafts are said to be "interleaved". When separating potatoes, potato haulm can become wrapped around the starshafts, and interleaving the starshafts provides a degree of self-cleaning.

It is also known from EP 0 410 808 to arrange starshafts in a lifting conveyor. Although the starwheels may be interleaved, it is particularly advantageous in a de-stoning machine for there to be a radial gap between the ends of the fingers of the starwheels of adjacent starshafts, ie the starwheels of adjacent starshafts are not interleaved. There is- therefore, no self-cleaning of the starshafts.

A device according to the preamble of claim 1 is known from US-A-1 524 360.

An object of the present invention is to provide starshafts in which build up of material is reduced and, in certain applications, self-cleaning is facilitated.

The invention provides an agricultural separating device having a starshaft comprising a row of resilient starwheels mounted on a rotatable shaft, wherein rings formed of a rigid material, and having an outer diameter such that they extend radially along 40-80% of the radial length of the fingers of the starwheels, are mounted between adjacent starwheels so as to close off the radially inner space between the fingers without reducing the length and therefore flexibility of the fingers.

By in effect enlarging the boss diameter, the area between starwheels into which separated material (soil, small stones and plant material) can be lodged is reduced, thereby reducing the build up of material, and also allowing self-cleaning with a lesser degree of interleaving of the starwheels.

The agricultural separating device may be used in any agricultural separator, eg in a stone and/or clod separator, in a machine for separating soil and clod from root vegetables or bulbs, in a harvester and also in static cleaning equipment.

The invention also provides an agricultural separator including an agricultural. separating device according to the invention. Preferably, the agricultural separator includes at least two agricultural separating devices according to the invention, wherein the starshafts are arranged adjacent and parallel to each other. Preferably, a clod roller is arranged adjacent and parallel to the downstream starshaft in the direction of movement, in use, of material being separated.

In a preferred embodiment, the clod roller and the downstream starshaft are movable as a unit relative to the adjacent upstream starshaft so as to vary the degree of interleaving between the starwheels of the said upstream and the downstream starshafts or to create or vary a radial spacing between the tips of the fingers of the starwheels of the said upstream and downstream starshafts.

Such a separator allows adjustment between a first position in which the starwheels are interleaved for self-cleaning, eg during separation of soil and clod from potatoes, and a second position in which the starwheels of adjacent starshafts are not interleaved, eg during harvesting carrots, or in a destoner, or when used merely as a separating conveyor.

The invention will be further described with reference to embodiments shown in the accompanying drawings, wherein:

  • Figure 1 shows in plan view parts of two interleaving starshafts of an agricultural separator,
  • Figure 2 shows in side view a ring of the separator of Figure 1,
  • Figure 3 shows in side view a starwheel of the separator of Figure 1,
  • Figure 4 shows diagrammatically in side view an agricultural separator in which one of the starshafts and the clod roller are movable together as a unit relative to an interleaved starshaft, and
  • Figure 5 shows diagrammatically in side view the separator of Figure 4 in which the starwheels of the starshafts have been separated.

In Figure 1, a first starshaft 1 comprises a plurality of starwheels 2 mounted on a shaft (not shown). Each starwheels 2 has a boss 3 and a plurality of curved, radially-extending resilient fingers 4, as can be seen also from Figure 3. The starwheels are preferably formed from polyurethane or rubber with a resilience, depending on the particular use, but could be formed from any other suitable material.

As can be seen from Figure 1, the sides of the bosses 3 of adjacent starwheels 2 abut each other and form a spacer between the fingers of adjacent starwheels.

Rings 5 of rigid material are mounted on the bosses 3 between adjacent starwheels 2 so as to extend radially along 40-80% of the radial length of the fingers. Preferably, the rigid rings 5 extend approximately 50% along the fingers as shown in Fig. 1. The rigid rings 5 are preferably made of plastics material, eg nylon or polypropylene, but any other suitable rigid material could be used.

There is a clearance play between the inner diameter of the rings 5 and the bosses 3 to facilitate fitting of the ring, although this is not essential.

As can be seen from Figure 1 the sides of the fingers 4 of the starwheel 2 taper inwardly away from the rings 5 in a radially outward direction, so as to provide a gap 13 between each ring 5 and the adjacent fingers 4; the gap 13 increases in a radially outward direction. This allows lateral flexing of the fingers 4 when a stone is drawn down between the starwheels. However, the rings 5 would still function reasonably well if the gaps 13 were absent, ie if the sides of the fingers 4 were parallel.

As can be also seen from Figure 1, a second starshaft 6 is arranged parallel to and adjacent the starshaft 1. The starwheels of the starshafts 1 and 6 are staggered so that the fingers 4 of the starwheels 2 of one starshaft enter the gaps between the starwheels 2 of the adjacent starshaft. The starwheels of adjacent shafts 1 and 6 are said to be "interleaved".

As already explained, the rigid rings 5 shown in Figures 1 and 2 may be mounted on starshafts incorporated in an agricultural separator, eg in a root-crop harvester (eg a potato harvester), a de-stoning machine, or in static cleaning or grading apparatus.

In Figures 4 and 5 an agricultural separator is shown having a pair of adjacent, parallel starshafts 7, 8 arranged upstream of a parallel clod roller 9, which may be arranged to rotate in the same direction as the starshafts 7, 8 (eg when harvesting carrots) or in the opposite direction (eg when harvesting potatoes).

The starshafts 7, 8 shown in Figures 4 and 5 are similar to the starshafts 1, 6 shown in Figure 1, ie they each have a plurality of starwheels 2 having bosses 3 and resilient fingers 4. They also have rigid rings 5 arranged on the bosses 3 between adjacent starwheels.

The downstream starshafts 8 and the clod roller 9 are mounted in the separator as a unit, which is pivotable as a unit about an axis 10 to enable the starshaft 8 to be moved away from the starshaft 7 to alter the degree of interleaving therewith. As can be seen from Figure 5, the pivoting movement may be such as to remove the interleaving altogether, so that there is a radial gap 11 between the tips of the fingers 4 of the starwheels 2 of the starshafts 7 and 8, eg when separating carrots; the pivoting movement may be used to adjust this gap depending on the material being separated.

Thus, the separator shown in Figures 4 and 5 may be used for separating both carrots and potatoes. When separating potatoes the starwheels are interleaved as shown in Figure 4, whereas when separating carrots the starwheels are separated as shown in Figure 5.

Alternatively, the separator shown in Figures 4 and 5 could be operated as shown in Figure 5, and moved into the interleaving position of Figure 4 merely for self-cleaning between periods of operation.

An advantage of the separator as shown in Figures 4 and 5 is that the starshafts 7, 8 can be moved apart without altering the overall length of a separating conveyor.

When the separator as shown in Figure 4 is used for harvesting potatoes, the counter-rotating clod roller 9 tends to force potato haulm into the gaps between the starwheels 2 of the starshaft 8. Interleaving of the starwheels 4 of the starshafts 7 and 8 is necessary to remove this haulm. Furthermore, with the rigid rings 5 arranged on the starshafts 7, 8 between the starwheels 4, the degree of interleaving required to produce self-cleaning is substantially less than without the rings 5.

The group of the starshafts 7, 8 and clod roller 9 as shown in Figures 4 and 5 may be arranged in series with one or more similar groups to form a separating surface in which the downstream starshaft and clod roller of each group are pivotable as a unit relative to the respective upstream starshaft. Thus, in Figures 4 and 5 the starshaft 12 shown on the left of each Figure could be the upstream starshaft of a further group comprising two starshafts and a clod roller.


Anspruch[de]
  1. Landwirtschaftliche Trennvorrichtung mit einer Sternwelle (1), die aufweist: eine Reihe von elastischen Sternrädern (2), die auf einer drehbaren Welle montiert sind; starre Ringe (5) aus einem starren Material, die zwischen benachbarten Sternrädern (2) montiert sind, dadurch gekennzeichnet, daß die starren Ringe (5) einen Außendurchmesser so aufweisen, daß sie sich radial über 40 bis 80 % der radialen Länge der Finger (4) der Sternräder (2) erstrecken, um so den radial inneren Abstand zwischen den Fingern (4) festzulegen, ohne daß die Länge und daher die Biegsamkeit der Finger (4) verringert wird.
  2. Landwirtschaftliche Trennvorrichtung nach Anspruch 1, bei der die Ringe (5) auf Naben (3) der benachbarten Sternräder (2) mit einem Zwischenraumspiel zwischen den Ringen (5) und den Naben (3) montiert sind, um das Montieren der Ringe auf den Naben zu erleichtern.
  3. Landwirtschaftliche Trennvorrichtung nach Anspruch 1 oder 2, bei der ein Spalt zwischen den Seiten der Finger (4) und den Enden der Ringe (5) vorhanden ist, um das seitliche Biegen der Finger (4) zu erleichtern.
  4. Landwirtschaftliche Trennvorrichtung nach einem der vorhergehenden Ansprüche, bei der die Ringe (5) aus einem starren Kunststoffmaterial hergestellt sind.
  5. Landwirtschaftliche Trennvorrichtung nach Anspruch 4, bei der das starre Kunststoffmaterial Nylon oder Polypropylen ist.
  6. Landwirtschaftliche Verlesemaschine, die eine landwirtschaftliche Trennvorrichtung nach einem der vorhergehenden Ansprüche umfaßt.
  7. Landwirtschaftliche Verlesemaschine, die mindestens zwei landwirtschaftliche Trennvorrichtungen nach einem der Ansprüche 1 bis 5 umfaßt, wobei die Sternwellen (7, 8) benachbart und parallel zueinander angeordnet sind.
  8. Landwirtschaftliche Verlesemaschine nach Anspruch 7, bei der die Sternräder (2) der Sternwellen (7, 8) versetzt sind, und bei der die Enden der Sternräder (2) der benachbarten Sternwellen (7, 8) ineinandergreifen.
  9. Landwirtschaftliche Verlesemaschine nach Anspruch 7, bei der die Sternräder (2) der Sternwellen (7, 8) versetzt und die Enden der Sternräder (2) der Sternwellen (7, 8) in einer radialen Richtung beabstandet sind.
  10. Landwirtschaftliche Verlesemaschine nach Anspruch 7, 8 oder 9, bei der eine Erdklumpenwalze (9) benachbart und parallel zur stromabwärts gelegenen Sternwelle (8) in der Bewegungsrichtung des zu trennenden Materials beim Einsatz angeordnet sind.
  11. Landwirtschaftliche Verlesemaschine nach Anspruch 10, bei der die Erdklumpenwalze (9) und die stromabwärts gelegene Sternwelle (8) als eine Einheit relativ zur benachbarten stromaufwärts gelegenen Sternwelle (7) beweglich sind, um den Grad des Ineinandergreifens zwischen den Sternrädern (2) der stromaufwärts und der stromabwärts gelegenen Sternwelle (7, 8) zu variieren, oder um einen radialen Abstand zwischen den Enden der Finger (4) der Sternräder (2) der stromaufwärts und der stromabwärts gelegenen Sternwelle (7, 8) zu erzeugen oder zu variieren.
  12. Landwirtschaftliche Verlesemaschine nach Anspruch 11, bei der die Erdklumpenwalze (9) und die stromabwärts gelegene Sternwelle relativ zur stromaufwärts gelegenen Sternwelle drehbar beweglich sind.
  13. Landwirtschaftliche Verlesemaschine nach Anspruch 12, bei der die Erdklumpenwalze (9) und die stromabwärts gelegene Sternwelle (8) um eine Achse (10) über der und stromaufwärts von der stromabwärts gelegenen Sternwelle (8) drehbar beweglich sind.
Anspruch[en]
  1. An agricultural separating device having a starshaft (I) comprising a row of resilient starwheels (2) mounted on a rotatable shaft rigid rings (5) formed of a rigid material mounted between adjacent starwheels (2), characterised in that the rigid rings (5) have an outer diameter such that they extend radially over 40-80% of the radial length of the fingers (4) of the starwheels (2), so as to close off the radially inner space between the fingers (4) without reducing the length and therefore flexibility of the fingers (4).
  2. An agricultural separating device as claimed in Claim 1, wherein the rings (5) are mounted on bosses (3) of adjacent starwheels (2) with clearance play between the rings (5) and the bosses (3) to facilitate mounting of the rings on the bosses.
  3. An agricultural separating device as claimed in Claim 1 or 2, wherein there is a gap between the sides of the fingers (4) and the ends of the rings (5) to facilitate lateral flexing of the fingers (4).
  4. An agricultural separating device as claimed in any one of the preceding claims, wherein the rings (5) are formed of a rigid plastics material,
  5. An agricultural separating device as claimed in Claim 4, wherein the rigid plastics material is nylon or polypropylene.
  6. An agricultural separator including an agricultural separating device as claimed in any one of the preceding claims.
  7. An agricultural separator including at least two agricultural separating devices as claimed in any one of Claims 1 to 5, wherein the starshafts (7, 8) are arranged adjacent and parallel to each other.
  8. An agricultural separator as claimed in Claim 7, wherein the starwheels (2) of the starshafts (7, 8) are staggered and the tips of the starwheels (2) of the adjacent starshafts (7, 8) interleave.
  9. An agricultural separator as claimed in Claim 7, wherein the starwheels (2) of the starshafts (7, 8) are staggered and the tips of the starwheels (2) of the starshafts (7, 8) are spaced in a radial direction.
  10. An agricultural separator as claimed in Claim 7, 8 or 9, wherein a clod roller (9) is arranged adjacent and parallel to the downstream starshaft (8) in the direction of movement, in use, of material being separated.
  11. An agricultural separator as claimed in Claim 10, wherein the clod roller (9) and the downstream starshaft (8) are movable as a unit relative to the adjacent upstream starshaft (7) so as to vary the degree of interleaving between the starwheels (2) of the said upstream and the downstream starshafts (7, 8) or to create or vary a radial spacing between the tips of the fingers (4) of the starwheels (2) of the said upstream and downstream starshafts (7, 8).
  12. An agricultural separator as clamed in Claim 11, wherein the clod roller (9) and the said downstream starshaft are pivotally movable relative to the said upstream starshaft.
  13. An agricultural separator as claimed in Claim 12, wherein the clod roller (9) and the said downstream starshaft (8) are pivotally movable about an axis (10) above and upstream of the said downstream starshaft (8).
Anspruch[fr]
  1. Dispositif de séparation agricole comportant un arbre-étoile (1) comprenant une rangée de roues-étoiles élastiques (2) montées sur un arbre rotatif, des anneaux rigides (5) composés d'un matériau rigide, montés entre les roues-étoiles adjacentes (2), caractérisé en ce que les anneaux rigides (5) ont un diamètre extérieur tel qu'ils s'étendent radialement le long de 40 à 80% de la longueur radiale des doigts (4) des roues-étoiles (2), de sorte à fermer l'espace radialement interne entre les doigts (4) sans réduire la longueur et donc la flexibilité des doigts (4).
  2. Dispositif de séparation agricole selon la revendication 1, dans lequel les anneaux (5) sont montés sur des bossages (3) de roues-étoiles adjacentes (2), un espacement étant établi entre les anneaux (5) et les bossages (3) pour faciliter le montage des anneaux sur les bossages.
  3. Dispositif de séparation agricole selon les revendications 1 ou 2, dans lequel un espace est établi entre les côtés des doigts (4) et les extrémités des anneaux (5) pour faciliter la flexion latérale des doigts (4).
  4. Dispositif de séparation agricole selon l'une quelconque des revendications précédentes, dans lequel les anneaux (5) sont composés d'un matériau plastique rigide.
  5. Dispositif de séparation agricole selon la revendication 4, dans lequel le matériau plastique rigide est du nylon ou du polypropylène.
  6. Séparateur agricole englobant un dispositif de séparation agricole selon l'une quelconque des revendications précédentes.
  7. Séparateur agricole englobant au moins deux dispositifs de séparation agricoles selon l'une quelconque des revendications 1 à 5, dans lequel les arbres-étoiles (7, 8) sont agencés de manière adjacente et parallèle les uns aux autres.
  8. Séparateur agricole selon la revendication 7, dans lequel les roues-étoiles (2) des arbres-étoiles (7, 8) sont décalées, les pointes des roues-étoiles (2) des arbres-étoiles adjacents (7, 8) étant imbriquées.
  9. Séparateur agricole selon la revendication 7, dans lequel les roues-étoiles (2) des arbres-étoiles (7, 8) sont décalées, les pointes des roues-étoiles (2) des arbres-étoiles (7, 8) étant espacées dans une direction radiale.
  10. Séparateur agricole selon les revendications 7, 8 ou 9, dans lequel un brise-mottes (9) et agencé de manière adjacente et parallèle à l'arbre-étoile aval (8) dans la direction du déplacement du matériau séparé, en service.
  11. Séparateur agricole selon la revendication 10, dans lequel le brise-mottes (9) et l'arbre-étoile aval (8) peuvent se déplacer sous forme d'une unité par rapport à l'arbre-étoile amont adjacent (7), de sorte à varier le degré d'imbrication entre les roues-étoiles (2) desdits arbres-étoiles amont et aval (7, 8) ou à établir ou varier un espacement radial entre les pointes des doigts (4) des roues-étoiles (2) desdits arbres-étoiles amont et aval (7, 8).
  12. Séparateur agricole selon la revendication 11, dans lequel le brise-mottes (9) et ledit arbre-étoile aval peuvent se déplacer par pivotement par rapport audit arbre-étoile amont.
  13. Séparateur agricole selon la revendication 12, dans lequel le brise-mottes (9) et ledit arbre-étoile aval (8) peuvent se déplacer par pivotement autour d'un axe (10) au-dessus et en amont dudit arbre-étoile aval (8).






IPC
A Täglicher Lebensbedarf
B Arbeitsverfahren; Transportieren
C Chemie; Hüttenwesen
D Textilien; Papier
E Bauwesen; Erdbohren; Bergbau
F Maschinenbau; Beleuchtung; Heizung; Waffen; Sprengen
G Physik
H Elektrotechnik

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