WO2023241757A1 - Outil agricole - Google Patents

Outil agricole Download PDF

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Publication number
WO2023241757A1
WO2023241757A1 PCT/DE2023/100439 DE2023100439W WO2023241757A1 WO 2023241757 A1 WO2023241757 A1 WO 2023241757A1 DE 2023100439 W DE2023100439 W DE 2023100439W WO 2023241757 A1 WO2023241757 A1 WO 2023241757A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
prestressing
pretensioning
piston rod
frame
Prior art date
Application number
PCT/DE2023/100439
Other languages
German (de)
English (en)
Inventor
Eric Hätzel
Georg Paulessen
Original Assignee
Lemken Gmbh & Co. Kg
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 Lemken Gmbh & Co. Kg filed Critical Lemken Gmbh & Co. Kg
Publication of WO2023241757A1 publication Critical patent/WO2023241757A1/fr

Links

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
    • A01B35/00—Other machines for working soil not specially adapted for working soil on which crops are growing
    • A01B35/02—Other machines for working soil not specially adapted for working soil on which crops are growing with non-rotating tools
    • A01B35/04—Other machines for working soil not specially adapted for working soil on which crops are growing with non-rotating tools drawn by animal or tractor or man-power
    • A01B35/06—Other machines for working soil not specially adapted for working soil on which crops are growing with non-rotating tools drawn by animal or tractor or man-power with spring tools or with resiliently- or flexibly-attached rigid tools
    • 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
    • A01B19/00—Harrows with non-rotating tools
    • A01B19/02—Harrows with non-rotating tools with tools rigidly or elastically attached to a tool-frame
    • 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
    • A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
    • A01B63/14—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements drawn by animals or tractors
    • A01B63/24—Tools or tool-holders adjustable relatively to the frame
    • A01B63/32—Tools or tool-holders adjustable relatively to the frame operated by hydraulic or pneumatic means without automatic control

Definitions

  • the present invention relates to an agricultural implement for soil cultivation.
  • tine harrows or hoe harrows are usually used, which are guided close to the surface through the soil to be worked and thereby mechanically pull out weeds and/or cover them with soil.
  • the tine harrows are often arranged with several tine harrows next to each other and in several rows one behind the other.
  • a generic soil cultivation device with tine harrows as soil cultivation tools is disclosed in DE 202012004337 U1.
  • the tine harrows are pivotably arranged on a support frame and are each pretensioned against a stop via a preload spring.
  • a preload force of the preload springs can be changed in groups by an operator of the soil cultivation device.
  • a preload spring is formed here from two springs connected in series, whereby a first spring comes into effect when the associated harrow tine is deflected and, after a certain deflection, a second spring comes into effect.
  • the force acting on the tines and thus during soil cultivation is not constant due to the spring characteristics alone and varies depending on the deflection of the harrow tines, which can lead to uneven cultivation of the soil.
  • EP1961283B2 also discloses a soil cultivation device for maintaining the soil areas of cultivated plants with several harrow tines pivotably arranged on a support frame and an adjusting device assigned to the harrow tines, through which the pretension of the harrow tines pre-tensioned by springs is centrally adjustable.
  • the adjusting device has an electric or hydraulic actuator that can be controlled by a control device. Due to the spring assigned to each harrow tine, the assembly and in particular the maintenance of the implement is complex and additional installation space is required for the device for changing the preload and the weight of the implement is also further increased.
  • the harrow tines are each attached to levers which are pivotably mounted via supports on bars of the support frame, with a pneumatic cylinder for pre-tensioning being arranged on the harrow tines. Due to the high number of pneumatic cylinders, the pneumatic system of the device is quite extensive and complex, which means that both assembly and maintenance are complex.
  • An agricultural implement for soil cultivation with a frame which comprises at least one tool frame, a plurality of soil tools, in particular harrow tines, which are pivotably arranged on the at least one tool frame, and a biasing device for biasing the soil tools by means of a biasing force, the biasing device having at least two fluid-filled biasing elements, wherein each biasing element has a piston rod connected to at least one piston chamber, and a piston rod is assigned to at least one floor tool.
  • the piston rods of the at least two prestressing elements are arranged, in particular directly, next to one another in a cylinder housing and the piston chambers of the respective piston rods can be fluidly connected to one another.
  • the fluid-filled biasing elements of the biasing device can be acted upon with a fluid in the form of oil or air, whereby a corresponding movement of the piston rods can be caused.
  • a biasing element can each have a piston chamber which is fluidly connected to the piston rod of the biasing element.
  • the piston spaces of the at least two fluid-filled biasing elements can be fluidly connected, which can be done, for example, by a connecting line or in that the piston spaces can be designed together as a piston space which extends over the at least two biasing elements.
  • Piston chambers Several biasing elements can form a common piston chamber.
  • a fluidic connection is to be understood as meaning that, for example, a change in pressure of the fluid in one piston chamber can lead to a similar change in pressure in the other piston chambers connected to this piston chamber.
  • the piston rods of the at least two prestressing elements can be in one common, in particular the same, cylinder housing.
  • the piston rods can each be arranged and/or guided in a cylinder formed by a cylinder housing.
  • the floor tools can be directly or indirectly operatively connected to the prestressing elements, in particular with the piston rods of the prestressing elements, so that a movement of the piston rods can lead to a displacement of the floor tools.
  • a pretensioning force acting on the ground tools can remain essentially constant over a travel path of a harrow tine on the ground, whereby a vertical contact force of the harrow tines can also be kept essentially constant over the travel path on the ground in order to enable improved soil cultivation .
  • many components such as springs or spring assemblies can be saved, which enables simplified assembly and maintenance of the working device. Thanks to the clearer arrangement of the pre-tensioning elements, the operator of the soil cultivation device can have a better view of the soil tools and the work results.
  • the arrangement of the prestressing elements and piston rods combined in, in particular a cylinder housing offers an improved arrangement of the prestressing elements and thus the prestressing device in relation to the center of gravity of the working device.
  • the cylinder housing is preferably designed in one piece or in several parts, with piston spaces in the cylinder housing being designed to be pressurized in the same or different ways.
  • a cylinder housing can be designed in the form of a cylinder housing beam, which has an elongated extension parallel to a frame or tool frame of the working device.
  • a multi-part cylinder housing can be composed of several cylinder housing parts, each with at least one piston chamber and at least one piston rod.
  • a preloading element with its associated piston rod can form a cylinder housing part.
  • the piston chambers of the cylinder housing parts can be fluidly connected to one another, whereby, for example, pressing a piston rod into the piston chamber can cause the other piston rods connected to the piston chamber to move out.
  • a cylinder housing designed in one piece offers the advantage of low assembly effort.
  • the individual cylinder housing parts can be designed to be uniform and thus enable a modular structure of the pretensioning device.
  • the biasing device is designed such that a controlled movement of a biasing element, in particular a piston rod of a biasing element, is made possible in two opposite directions.
  • a biasing element in particular a piston rod of a biasing element
  • This controlled movement in opposite directions thus enables a corresponding movement of at least one floor tool, which is connected to the biasing element.
  • a biasing element is advantageously designed in the form of a double-acting cylinder, with a second piston chamber being provided in addition to the piston chamber.
  • This second piston chamber can be designed in a ring shape around the piston rod.
  • a plurality of second piston chambers can be fluidly connected to one another and designed to be acted upon by a fluid, whereby a controlled similar movement of the prestressing elements coupled in this way can take place.
  • the cylinder housing is formed by the frame, in particular at least one tool frame, wherein the frame, in particular the at least one tool frame, forms a piston chamber.
  • the frame or the at least one tool frame can accommodate and guide the piston rods of the prestressing elements.
  • the frame or the at least one tool frame can be designed as a closed profile, for example in the form of a U-profile closed with a plate for receiving and guiding the piston rods.
  • the piston chamber formed by the frame or the at least one tool frame can be effective for all prestressing elements arranged on this frame or tool frame and their piston rods, whereby a common control of the piston rods connected to this piston chamber by pressurizing and / or changing the pressure of the fluid in the Piston space can be made possible.
  • the piston chamber can also be designed as a fluid reservoir that can be pressurized, for example in a section free of prestressing elements.
  • the prestressing device comprises at least one connecting element, through which at least one floor tool is operatively connected to a prestressing element, in particular a piston rod of a prestressing element.
  • a floor tool can be indirectly connected to a biasing element and/or a piston rod by a connecting element in order to enable a controlled pivoting movement of the floor tool depending on a movement of the piston rod of the biasing element.
  • a connecting element can be in the form of a Rod for transmitting tensile forces and compressive forces or in the form of a rope for transmitting tensile forces.
  • At least two floor tools which are each operatively connected to one, in particular the same, prestressing element via a connecting element, are advantageously coupled via a web of the prestressing device arranged on the prestressing element side.
  • the connecting elements of the floor tools can each be articulated to the web at opposite ends, wherein the web can be connected centrally to the prestressing element, in particular the piston rod of the prestressing element.
  • this movement can be transmitted to the web via the connecting element and lead to a pivoting movement of the end of the web assigned to this floor tool around the opposite end, which is assigned to the other floor tool .
  • This pivoting movement can lead to a corresponding movement of the prestressing element connected to the web, in particular its piston rod, whereby a movement of the other floor tools can be avoided.
  • the arrangement of the web and the associated connecting elements and piston rod basically act like a horizontal bogey wheel arrangement.
  • a piston guide is preferably provided for guiding a piston rod, the piston guide being arranged, in particular releasably, in the cylinder housing and/or being formed in one piece with the cylinder housing.
  • a piston guide can also serve to seal the piston chamber from the environment.
  • the piston rod guide can be formed in one piece with the cylinder housing, for example directly in the frame or tool frame. This offers the advantage of low assembly effort.
  • a piston guide can also be designed as a separate component and arranged on or in the cylinder housing, which allows simplified maintenance, for example by replacing the piston guides.
  • the piston rods are arranged next to one another in one plane or in a plurality of essentially parallel planes, wherein the piston rods are displaceable essentially in one working direction and/or essentially against the working direction.
  • a shift in the piston rods can cause a change in the preload force applied to the associated floor tools.
  • the piston rods can be arranged next to one another in one or more planes, and these planes can also be arranged twisted relative to one another, for example.
  • the levels can, for example, be arranged horizontally, vertically, or at an angle to the working direction and/or the floor.
  • the prestressing elements and piston rods can be arranged on the frame to save space.
  • the pretensioning device is arranged and/or guided at least partially below, within and/or above the frame, in particular tool frame. This enables a space-saving arrangement on the implement, which also improves View of the ground tools allows and can also protect the pretensioning device from damage during operation.
  • the pretensioning device is designed and constructed in such a way that several pretensioning elements can be actuated individually or in groups.
  • Jointly operable preloading elements in particular their piston rods, can have a common piston chamber, the fluid of which can be pressurized.
  • the biasing elements can be arranged in a common cylinder housing with separately controllable piston chambers. It is also conceivable that the cylinder housing is designed in several parts, with the piston chambers of the cylinder housing parts being able to be pressurized separately from one another. As a result, the biasing elements connected to a common piston chamber can be controlled together. This has the advantage that individual rows of ground tools, in particular rows of tines, can be loaded separately, whereby, for example, individual rows or sections can be brought into contact with the ground or excavated.
  • At least one restoring element counteracting the prestressing force is provided, with a restoring element being assigned to at least one prestressing element, in particular a piston rod and/or a floor tool.
  • a restoring element can generate a restoring force which acts against a prestressing force of the prestressing element.
  • the restoring force can act directly on a piston rod of the prestressing element and/or a floor tool assigned to the prestressing element.
  • the restoring force is greater than the preloading force, the preloading element and in particular its piston rod can be reset, whereby a floor tool, for example can be raised into a transport position after reaching the ground.
  • a restoring element can be designed, for example, in the form of an elastic ring, a spring, in the form of a second piston rod that counteracts the first, or a double-acting piston rod.
  • the restoring element of a piston rod is preferably designed in the form of an elastic element or a spring and is arranged inside or outside the piston chamber on the piston rod.
  • the restoring element outside the piston chamber can be designed, for example, in the form of an elastic ring, which is arranged on the frame.
  • the restoring element can be designed, for example, in the form of a spring arranged around the piston rod, whereby the restoring element can be arranged protected from external influences.
  • the biasing device has at least one fluid reservoir, in particular pressure accumulator, at least one control valve, a pump, a fluid coupling for connection to a towing vehicle, and/or a control unit for controlling at least one biasing element.
  • Fig. 1 a perspective view of a working device, each with one
  • Fig. 2 a perspective view of a bar-shaped cylinder housing of the connecting elements from Fig. 1;
  • Fig. 3 a sectional side view of a tool frame with a biasing element arranged thereon according to Fig. 1;
  • Fig. 4 a side view of a substantially above a
  • Tool frame arranged pretensioning device
  • Fig. 5 a top view of a pretensioning device with connecting elements connected via webs.
  • the frame 1 shows an agricultural implement 1 for soil cultivation with a frame 3 on which a coupling device 2 for connecting the implement 1 to a towing vehicle (not shown) is arranged.
  • the frame 3 comprises a plurality of tool frames 4 arranged parallel to a working direction, with a plurality of floor tools 5 being pivotably arranged on each tool frame 4 at a distance from one another.
  • the soil tools 5 in the form of harrow tines are each pivotally connected to the frame 3, in particular the tool frame 4, at a bearing point 6.
  • the soil tools 5 are shown in a lowered soil cultivation position and can be raised into a transport position in which the soil tools 5 essentially rest against an underside of the tool frames 4.
  • the soil tools 5 For soil cultivation, the soil tools 5 must act on the soil with at least a certain force, for example to pull out unwanted weeds.
  • the working device 1 has a pretensioning device 7, through which the floor tools 5 can be subjected to an adjustable pretensioning force.
  • the biasing device 7 has at least two fluid-filled biasing element 8, whereby the fluid can be air or a liquid such as oil.
  • the work machine 1 shown has a plurality of fluid-filled biasing elements 8, each biasing element 8 having a piston rod 10 connected to at least one piston chamber 9, and a piston rod 10 each being assigned to at least one floor tool 5.
  • the floor tools 5 are each connected to a piston rod 10 of a prestressing element 8 via connecting elements 14.
  • the piston rods 10 of the prestressing elements 8 are arranged next to one another in a cylinder housing 11 and the piston chambers 9 of the respective piston rods 10 are fluidly connected to one another.
  • the pretensioning device 7 can be connected to the towing vehicle (not shown) via a fluid coupling 21 and supplied and/or controlled via its fluid device.
  • the working device 1 shown has a fluid reservoir 18 arranged on the frame 3, which is connected to a control unit 22, a pump 20 and control valves 19 for controlling the pretensioning device 7.
  • the prestressing elements 8 (Fig. 2) and their piston rods 10 are arranged next to each other in one plane in a common bar-shaped cylinder housing 11.
  • the cylinder housing 11 is composed of several cylinder housing parts 12.
  • the cylinder housing 11 can also be formed in one piece.
  • the piston rods 10 are each guided by means of a piston guide 16 inserted into the cylinder housing 11 and are fluidly connected to a common piston chamber (not shown), whereby when the pressure of the fluid in the piston chamber 9 changes, a common movement of the piston rods 10 connected to the piston chamber 9 occurs Biasing elements 8 takes place.
  • the piston chamber 9 is connected via a connection 23 For example, it can be connected to the fluid reservoir 18 and can be pressurized via the pump 20.
  • Fig. 3 the biasing device 7 is shown in a sectioned side view.
  • the cylinder housing 11 has the fluid-filled piston chamber 9 on the inside, through which the piston rod 10 of the biasing element 8 can extend from the cylinder housing 11 when pressure is applied.
  • the floor tools 5 can be raised via the illustrated connection of the piston rod 10 with the floor tools 5 below the tool frame 4 by means of a connecting element 14.
  • the floor tools 5 can be subjected to a prestressing force by reducing the pressure in the piston chamber 9, or by increasing the pressure in a second piston chamber 13, which is designed in a ring shape around the piston rod 10.
  • the second piston chamber 13 can also act like a restoring element 17 on the piston rod 10 or the biasing element 8.
  • the piston rod 10 is guided in the piston guide 16, which is inserted into the cylinder housing 11 as a separate component.
  • the piston guide 16 could also be designed in one piece with the cylinder housing 11.
  • FIG. 4 A side view of a pretensioning device 7 and floor tools 5 with restoring elements 17 is shown in FIG. 4.
  • the connecting elements 14, which connect the floor tools 5 to the prestressing element 8, are arranged above the tool frame 4.
  • a restoring element 17 in the form of an elastic ring is arranged on the floor tools 5 stored in bearing points 6, which extends from an end of the floor tool 5 on the connecting element side around the tool frame 4 to the bearing point 6 and is fastened there, for example, in a form-fitting manner.
  • the floor tools 5 can be used by means of the restoring elements 17 when the pressure decreases Preloading force can be raised, for example up to a transport position on the tool frame 4.
  • the prestressing device shown in FIG. 5 is shown in a top view, with two floor tools 5 being connected to a web 15 on the prestressing element side via connecting elements 14.
  • the floor tools 5 are each articulated to the web 15 at opposite ends. Essentially in the middle of the web 15, it is articulated to the piston rod 10 of the associated biasing element 8.
  • both floor tools 5 can be subjected to a prestressing force or, for example, can be raised in a transport position. In the event of a substantially vertical deflection of one of the two floor tools 5, this is transferred to the web 15 via the connecting element 14, which can result in the web 15 pivoting around the bearing of the other floor tool 5.
  • the piston rod 10 is also moved due to its connection to the web 15, for example pulled out of the cylinder housing 11.
  • the other floor tool 5, around whose end of the web 15 the pivoting took place undergoes essentially no displacement and thus no change in its preload force.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Zoology (AREA)
  • Actuator (AREA)

Abstract

La présente invention concerne un outil agricole pour le travail du sol, ledit outil comprenant : un cadre (3) qui a au moins un cadre d'outil (4) ; une pluralité d'outils de sol (5), en particulier des dents de herse, qui sont montés pivotants sur ledit cadre d'outil (4) ; et un dispositif de précontrainte (7) pour précontraindre les outils de sol (5) au moyen d'une force de précontrainte, le dispositif de précontrainte (7) ayant au moins deux éléments de précontrainte remplis de fluide (8), chaque élément de précontrainte ayant une tige de piston (10) reliée à au moins une chambre de piston (9), et chaque tige de piston (10) étant associée à au moins un outil de sol (5). Selon l'invention, les tiges de piston (10) desdits éléments de précontrainte (8) sont positionnées les unes à côté des autres, en particulier directement les unes à côté des autres, dans un carter-cylindre (11), et les chambres de piston (9) des tiges de piston (10) peuvent être reliées de manière fluidique les unes aux autres.
PCT/DE2023/100439 2022-06-14 2023-06-12 Outil agricole WO2023241757A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022114983.8 2022-06-14
DE102022114983.8A DE102022114983A1 (de) 2022-06-14 2022-06-14 Landwirtschaftliches Arbeitsgerät

Publications (1)

Publication Number Publication Date
WO2023241757A1 true WO2023241757A1 (fr) 2023-12-21

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ID=87036273

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2023/100439 WO2023241757A1 (fr) 2022-06-14 2023-06-12 Outil agricole

Country Status (2)

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DE (1) DE102022114983A1 (fr)
WO (1) WO2023241757A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4218750A1 (de) * 1992-06-03 1993-12-09 Thrige Agro A S Skive Steinsicherung insbesondere für einen Schwenkpflug
DE10341757A1 (de) * 2003-09-10 2005-04-14 Landmaschinenfabrik Köckerling GmbH & Co KG Landwirtschaftliche Maschine
DE202012004337U1 (de) 2012-04-28 2013-07-30 Paul Treffler Zinkenstriegel
EP1961283B2 (fr) 2007-02-22 2017-01-04 Paul Treffler Appareil de traitement des sols
EP3738419A1 (fr) 2019-05-16 2020-11-18 Thomas Hatzenbichler Agro-Technik GmbH Équipement de préparation du sol

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4218750A1 (de) * 1992-06-03 1993-12-09 Thrige Agro A S Skive Steinsicherung insbesondere für einen Schwenkpflug
DE10341757A1 (de) * 2003-09-10 2005-04-14 Landmaschinenfabrik Köckerling GmbH & Co KG Landwirtschaftliche Maschine
EP1961283B2 (fr) 2007-02-22 2017-01-04 Paul Treffler Appareil de traitement des sols
DE202012004337U1 (de) 2012-04-28 2013-07-30 Paul Treffler Zinkenstriegel
EP3738419A1 (fr) 2019-05-16 2020-11-18 Thomas Hatzenbichler Agro-Technik GmbH Équipement de préparation du sol

Also Published As

Publication number Publication date
DE102022114983A1 (de) 2023-12-14

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