WO2022112252A1 - Outil agricole multifonctionnel pour machines agricoles - Google Patents

Outil agricole multifonctionnel pour machines agricoles Download PDF

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Publication number
WO2022112252A1
WO2022112252A1 PCT/EP2021/082692 EP2021082692W WO2022112252A1 WO 2022112252 A1 WO2022112252 A1 WO 2022112252A1 EP 2021082692 W EP2021082692 W EP 2021082692W WO 2022112252 A1 WO2022112252 A1 WO 2022112252A1
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WO
WIPO (PCT)
Prior art keywords
blade
blades
agricultural
agricultural tool
central
Prior art date
Application number
PCT/EP2021/082692
Other languages
English (en)
Inventor
Roberto Caraceni
Stefano FIORANI
Original Assignee
Rost Srl
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
Application filed by Rost Srl filed Critical Rost Srl
Publication of WO2022112252A1 publication Critical patent/WO2022112252A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
    • A01B33/02—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs with tools on horizontal shaft transverse to direction of travel
    • A01B33/021—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs with tools on horizontal shaft transverse to direction of travel with rigid tools

Definitions

  • the present patent application for industrial invention relates to a multifunctional agricultural tool for agricultural implements.
  • the sector of reference is the agricultural one, in particular that of the preparation of the seedbed after plowing. Agricultural implements pulled by tractors are used to work the soil.
  • the first type which is defined as a powered cultivator, comprises a supporting frame including a horizontal motorized roller, arranged in a transverse direction with respect to the forward direction of the tractor. Blades project from the roller in radial direction, which are suitable for moving and breaking up the clods of earth.
  • These blades are usually twisted or shaped like a half-moon.
  • Said powered cultivators are impaired by a drawback because they are not capable of working and breaking up the soil properly. Moreover, a second drawback is related to the fact that the powered cultivators of the prior art have a high energy consumption which results in a high cost of use.
  • a second type of agricultural implement which is defined as a rotary harrow, comprises a supporting frame and a plurality of vertical knives mounted on the supporting frame in such a way to rotate around their axis. The knives penetrate the soil and break the clods of earth as they rotate.
  • US1665532A discloses a plow comprising a central hub and a plurality of frames in side-by-side position. Each frame is composed of radial arms. A plate is mounted on each arm in such a way that the plates mounted on the arms of the same frame define a circumference of plates. All plates of the same circumference of plates are identical, have a rectangular shape and are inclined in the same way. When in operation, during the rotation of the rotor, the plates of the same circumference of plates break up and work the soil always in the same way.
  • US4191259A discloses a rotary cultivator comprising a shaft and a plurality of blade assemblies that extend for the entire length of the shaft. Each blade assembly comprises a flange whereto four radial blades are connected.
  • the blades consist in knives of two different types disposed in alternate position. When in operation, the alternate knives work the soil in a different way. However, said knives do not work the soil accurately and efficaciously. Moreover, the knives are not reliable because they bend easily in case of hard soil, frequently requiring maintenance or replacement operations.
  • NL122067C discloses an agricultural apparatus comprising a central shaft, and a series of adjacent frames provided with arms, each arm being provided with a plate. All plates are identical and therefore, when in operation, they break up and work the soil always in the same way.
  • the purpose of the present invention is to overcome the drawbacks of the prior art by devising an agricultural tool that is reliable and efficient, capable of breaking up the soil effectively and optimally.
  • Another purpose is to devise an agricultural tool that is provided with blades that are able to break up and work the soil in a different way.
  • a further purpose is to devise a tool that is designed in such a way as to reduce energy consumption.
  • Fig. 1 is an axonometric view of an agricultural tool according to the invention
  • Fig. 1 A is an axonometric view of the agricultural tool of Fig.1 , seen from a different angle;
  • Figs. 2A and 2B show the two types of blades of the agricultural tool of
  • Fig. 2C is a view of an alternative embodiment of the blade shown in Fig. 2B;
  • Fig. 3 is a diagrammatic top view of an assembly, comprising a central supporting head, two tools and a cutting unit.
  • an agricultural tool according to the invention is disclosed, which is generally indicated with reference number (100).
  • the agricultural tool (100) comprises: a central hub (1 ) with an axis of rotation (X); and a plurality of frames (10) fixed to the central hub (1) in side-by- side position; each frame (10) has a plurality of arms (11 ), each one radially producing relative to the central hub (1);
  • Each arm (11) has a first end (11a) in proximal position to the central hub (1 ), a second end (11b) opposite to the first end (11a), and a longitudinal axis (V).
  • Said agricultural tool (100) comprises a blade (2, 3) for each arm (11) of each frame (10).
  • the blades (2, 3) mounted on the arms (11) of the same frame (10) form a circumference of blades, wherein the blades are arranged along the perimeter around the respective frame (10) in equidistant position with respect to the axis of rotation (X) of the central hub (1).
  • each blade (2, 3) consists of a plate fixed to the second end (11 b) of the arm (11 ).
  • said blade (2, 3) (which consists of the plate) is butt welded to the second end (11b) of the support arm (11) that supports it and lies on a plane orthogonal to the longitudinal axis (V) of the support arm whereto it is connected (see Fig. 1 A).
  • the blades (2, 3) of a circumference of blades comprise removal blades (2) and crushing blades (3) disposed in alternate position around the frame (10).
  • the crushing blade (3) and the removal blade (2) differ in that: the crushing blade (3) comprises two converging sharp edges (21 , 31), each one comprising at least one notch (3f) that defines at least one corner along the converging sharp edge (31); whereas the removal blade (2) comprises two straight converging sharp edges (21).
  • the blades (2, 3) mounted on the same frame (10) are all equally spaced from each other angularly.
  • each frame (10) comprises eight blades (2, 3) that are equally spaced from each other angularly by 45°.
  • the arms (11) of two adjacent frames (10) are staggered in such a way that the blades (2, 3) are staggered.
  • the arms (11 ) of two adjacent frames (10) are staggered by an angle comprised between 17.5° and 27.5°, preferably 22.5°.
  • the crushing blades (3) and the removal blades (2) (which consist of the plates) comprise an inner side facing the central hub (1) and an outer side (2e, 3e) facing the opposite direction relative to said inner side.
  • Each blade (2, 3) comprises a central longitudinal axis (Y2, Y3) that lies on a plane orthogonal to the axis of rotation of the central hub (1).
  • the longitudinal axes (Y2, Y3) of the blades (2, 3) mounted on the same frame (10) lie on the same plane orthogonal to the axis of rotation (X) of the central hub (1).
  • Each blade (2, 3) is symmetrical with respect to said longitudinal axis (Y2, Y3).
  • Each blade (2, 3) comprises a first portion (2a, 3a) with triangular shape and a second portion (2b, 3b) with a substantially rectangular shape.
  • the first portion (2a, 3a) comprises said two converging sharp edges (21 , 31).
  • the second portion (2b, 3b) comprises:
  • transverse sharp edge 22, 32
  • Y2, Y3 the longitudinal axis of the blade (2, 3) and joins the two parallel lateral edges (24, 34).
  • the converging sharp edges (21 , 31) of the removal blade and of the crushing blade are joined by a transverse end edge (23, 33).
  • the two portions (2a, 3a and 2b, 3b) of the two types of blades (2, 3) make the tool multifunctional. More specifically, the agricultural tool (100) can be used either by rotating it about the axis of rotation (X) of the central hub (1) in such a way that the soil is impacted and worked by the converging sharp edges (21 , 31) of the blades (2, 3), or by rotating it in such a way that the soil is impacted and worked by the transverse cutting edges (22, 32) of the blades (2, 3).
  • the tool is rotated around the axis of rotation (X) in such a way that the soil is worked by the converging sharp edges (21 , 31), then the clods of earth will be broken up and worked. If, on the other hand, the tool (100) is rotated in the other direction, then the soil will be worked by the transversal sharp edges (22, 32), performing other operations, such as, for example: earthing up a plant, i.e. moving some soil around the base of a plant in order to create small protective ribs at the base of the plant; or mechanical weeding, i.e. mechanically cutting and removing weeds.
  • each converging sharp edge (21) is inclined by an angle (m) comprised between 30° and 35° relative to the longitudinal axis (Y2, Y3).
  • the two types of blades (2, 3) differ in that the removal blade (2) continuously comprise the convergent sharp edges (21) (see Fig. 2A), whereas the crushing blade (3) comprises the converging sharp edges (31) that are indented and comprise at least one notch (3f) that defines corners (3s) along the converging sharp edge (31) (see Fig. 2B).
  • the crushing blade (3) may also comprise a plurality of notches (3f) disposed in series along the converging sharp edges (31), defining a serrated profile, as shown in Fig. 2C.
  • the two blades (2, 3) have a different function during the rotation and use of the agricultural tool (100).
  • the crushing blade (3) impacts and penetrates the soil, its intended edge cuts and crushes the soil, whereas the removal blade (2) penetrates the soil, acting as a shovel, removing and carrying away the soil that was previously broken up by the crushing blade (3), leaving free soil that will be penetrated and worked by the successive crushing blade (3).
  • each blade (2, 3) comprises knurling and/or ribs (Z) formed in adjacent position to the converging sharp edges (21 , 31).
  • each knurling and/or rib (Z) extends along an axis perpendicular to the longitudinal axis of the blade (2, 3).
  • Said knurling and/or ribs (Z) allow for scraping and crushing the clods of earth easily.
  • a further object of the present invention is an assembly (G) suitable for being mounted on a supporting frame of an agricultural implement suitable for being pulled by a tractor or suitable for being mounted in an ordinary powered cultivator suitable for being pushed by a user.
  • the assembly (G) according to the invention comprises:
  • central supporting head (4) suitable for being fixedly or movably supported by the supporting frame of the powered cultivator or agricultural implement;
  • said assembly (G) comprises a cutting unit fixed to the central supporting head (4) and comprising:
  • arms (51) that project perpendicularly from said bar (5), each one of them being partially interposed between two adjacent frames (10).
  • the function of said arms (51) is to cut any grass or branches that are twisted around the central hub (1 ) of the agricultural tool (100) and to prevent any wet soil and mud from agglomerating around the agricultural tool (100).
  • the rotation of the agricultural tools (100) causes any wires, branches or the like, which are twisted around the central hub (1) to hit and violently impact against said arms (51), consequently cutting and crushing said elements, thus preventing them from getting stuck and from opposing the rotation of the central hub (1). Otherwise said, during the rotation of the agricultural tools (100), a scissor effect is generated between the frames (10) and the arms (51), thus cutting and crushing any wires, branches, or the like.
  • each tool comprises three frames (10) (in star configuration) disposed side by side, each one having eight blades (2, 3) that are equally spaced angularly, proved to be the optimal solution that provides a fair compromise between the number of frames (10) and blades (2, 3) and the quality of the soil obtained by using these agricultural tools (100).
  • the blades consisting of plates mounted orthogonally on the ends of the arms of the frames are more reliable and efficient than the knives that cut the ground only along a direction orthogonal to the axis of rotation of the hub.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Soil Working Implements (AREA)

Abstract

Outil agricole (100) comprenant un moyeu central (1) ayant un axe de rotation (X), une pluralité de cadres (10) reliée au moyeu central (1) côte à côte, chacun comprenant une pluralité de bras (11) ; une pluralité de lames (2, 3), un pour chaque bras (11) de chaque cadre (10) ; chaque lame (2, 3) consiste en une plaque fixée à une extrémité (11b) du bras (11) ; la particularité de l'outil agricole (100) est que les lames (2, 3) comprennent des lames de broyage (3) et des lames de retrait (2) en position alternée, et que chaque lame de broyage (3) comprend deux bords aigus convergents (31) avec au moins une encoche (3f), tandis que chaque lame de retrait (2) comprend deux bords tranchants convergents droits (21).
PCT/EP2021/082692 2020-11-25 2021-11-23 Outil agricole multifonctionnel pour machines agricoles WO2022112252A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102020000028409 2020-11-25
IT202000028409 2020-11-25

Publications (1)

Publication Number Publication Date
WO2022112252A1 true WO2022112252A1 (fr) 2022-06-02

Family

ID=74592487

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/082692 WO2022112252A1 (fr) 2020-11-25 2021-11-23 Outil agricole multifonctionnel pour machines agricoles

Country Status (1)

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WO (1) WO2022112252A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL122067C (fr)
US1665532A (en) 1926-11-12 1928-04-10 Ancel R Cook Rotary type of plow
CH231441A (de) * 1942-06-15 1944-03-31 Hermann Sigrist Josef Ackergerät mit Zugmaschine.
US4191259A (en) 1978-06-19 1980-03-04 Boren Charles F Rotary cultivator and mulcher

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL122067C (fr)
US1665532A (en) 1926-11-12 1928-04-10 Ancel R Cook Rotary type of plow
CH231441A (de) * 1942-06-15 1944-03-31 Hermann Sigrist Josef Ackergerät mit Zugmaschine.
US4191259A (en) 1978-06-19 1980-03-04 Boren Charles F Rotary cultivator and mulcher

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