WO2017222368A1 - Faucheuse - Google Patents

Faucheuse Download PDF

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Publication number
WO2017222368A1
WO2017222368A1 PCT/NL2017/050365 NL2017050365W WO2017222368A1 WO 2017222368 A1 WO2017222368 A1 WO 2017222368A1 NL 2017050365 W NL2017050365 W NL 2017050365W WO 2017222368 A1 WO2017222368 A1 WO 2017222368A1
Authority
WO
WIPO (PCT)
Prior art keywords
mowing
mower
mowing member
blade
motor
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/NL2017/050365
Other languages
English (en)
Inventor
Willem Jacobus Reijersen Van Buuren
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Forage Co BV
Original Assignee
Forage Co BV
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 Forage Co BV filed Critical Forage Co BV
Publication of WO2017222368A1 publication Critical patent/WO2017222368A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/64—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis mounted on a vehicle, e.g. a tractor, or drawn by an animal or a vehicle
    • A01D34/66—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis mounted on a vehicle, e.g. a tractor, or drawn by an animal or a vehicle with two or more cutters
    • A01D34/664—Disc cutter bars
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/76—Driving mechanisms for the cutters
    • A01D34/78—Driving mechanisms for the cutters electric
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/82—Other details
    • A01D34/828—Safety devices

Definitions

  • the invention relates to a mower comprising a support to which a plurality of mowing members are mounted rotatably about vertical rotation axes and each mowing member defining a rotation area surrounding its vertical rotation axis.
  • Such mowers are known in the art, as e.g. from EP0126518 or US8327612, in which the mowing members include a series of knife holders with mowing knives which are mounted by side on a frame and which knife holders are rotated about vertical center lines by means of a drive mechanism couple to a power take-off or another external drive device.
  • the knife holders being fastened in rotationally fixed manner on associated hubs or output shafts which are driven by the drive mechanism.
  • Known drive arrangements include a common drive shaft with suitable (conical) gear wheels to drive each knife holder. Alternatively it is known to use a gear train.
  • Rotation of the knives severs the crop (such as e.g. grass) by the impact on it.
  • the mower is also moved in a general forward direction, over a field containing the crop by being pulled by (or carried on) a tractor or is self-driven or is part of an autonomous vehicle.
  • mowing member may have a blade carrier to which the mowing blades are integrally formed.
  • the member may be in the form of an elongated member mounted to the support, and including mowing blades in the form of sharpened edges at end positions with respect to the center of the member. Such blades are generally used in mulching mowers.
  • Mowing a crop is done by the combined action of moving the mower forward e.g. by pulling it by a tractor and the mowing members rotating.
  • the mowing members encounter obstacles, such as e.g. rocks or tree stumps or waste or the like. This may cause blockage of the rotational movement of the mowing member, which in turn causes an overload of the drive mechanism.
  • the mower is pulled forward past the obstacle. Such a collision may cause damage to multiple parts of the mower, e.g. to one or more mowing members, to the central drive system, to the mowing knives and may lead to expensive and difficult repairs.
  • each mowing member mounted rotatably about a vertical rotation axis to a support ,
  • each mowing member comprising an electric drive motor couplable thereto and arranged to drive the mowing member to rotate along a circular trajectory coaxial to the vertical rotation axis and wherein,
  • the mower further comprises at least one control device arranged to control at least one of the electric drive motors move the mowing member to a pre-defined position on its circular trajectory.
  • control device arranged to control the motor move the mowing member to a pre-defined position on its circular trajectory.
  • the rotation of the mowing element and thus also the stopping of the mowing member may be done in a controlled.
  • the invention may be arrested by the obstacle, and the invention than provides a means to move the mowing member to a pre-defined position. Preventing further damage to the mowing member.
  • a series of pre-defined positions may be defined on the circular trajectory allowing for complete control of the movement of the mowing element.
  • control device includes a position location device to determine the actual position of the mowing member on the circular trajectory and the control device is arranged to control the motor to move the mowing member from the actual location to the pre-defined position.
  • control device including a position location and arranging the control device to control the motor to move the mowing member from the actual location to the pre-defined position, an efficient manner to control where the mowing member is, is provided.
  • the pre-defined position is the position in which the the mowing member may be stopped on its circular trajectory.
  • the mowing member may be brought to a stop in a controlled manner.
  • each mowing member comprising at least one mowing blade having a free outer end, which blade in normal operating circumstances projects radially outwardly including a radial center line which radial center line extends from the rotation axis outward and the free outer end following a circular blade trajectory, and
  • each mowing member is mounted to the frame adjacent to another mowing member such that the respective blade trajectories define an overlap area between them, and wherein a pre-defined stop position is chosen such is such that the radial line of the blade of the stopped mowing member does not intersect the overlap area.
  • a mowing circle is the area covered by a rotating mowing blade.
  • the mowing members are mounted to the frame adjacent each other creating an overlap of the blade trajectories.
  • the invention solves this by selecting a so-called 'safe position' for the blade that was stopped.
  • the safe position is the pre-defined stop position in which the radial line of the blade of the stopped mowing member does not intersect the overlap area.
  • the position location device comprises an encoder.
  • Encoders can convert the angular position or motion of a shaft or axle to an analog or digital code.
  • the encoder can be used to determine this for the shaft driving the mowing member.
  • the mower includes at least one capacitor electrically connected to the motor and the control device is arranged to stop rotation of the at least one mowing member by controlling the capacitor to inject DC current into the motor to be stopped.
  • An effective manner of stopping the rotation of an electric motor is by DC injection which involves injection DC current into the rotor of the motor.
  • the DC current creates a stationary magnetic field which applies a static torque to the rotor slowing it down to a stop. Injecting the DC current in relation to the rotation position of the mowing member may be used to effectuate stopping of the mowing member in the pre-defined stop position.
  • FIG. 1 is a diagrammatic top view of an embodiment of the mower according to the invention.
  • FIG. 1 shows mower 1 having a plurality of mowing members 2, each mowing member 2 mounted rotatably about a vertical rotation axis 3 to a support 4, and each mowing member 2 having an electric drive motor 5 drive the mowing member to rotate along circular trajectory 6.
  • the circular trajectory 6 is coaxial to the vertical rotation axis 3.
  • the mowing member as shown is of a general oblong shape. Alternatively the mowing member could be circular.
  • the mower 1 further is equipped with at least one control device 7 arranged to control at least one of the electric drive motors 5 to control rotation of the mowing member to rotate the mowing member into a pre-defined position with respect to its circular trajectory.
  • the motor can rotate the mowing member, and stop the member in a position.
  • the positions of the blades of all the mowing members can be controlled. In one rotation the knives will pass 360 degrees of a circle.
  • the positions of the blades of each mowing member can also be controlled relative to each other. In a conventional mower this is done by a mechanically by using a gear train. In the mower of the invention this is achieved by motor control and the control device controlling the positions of all the mowing members/blades by controlling each motor. In this manner the position and the speed as well as the direction of rotation of the mowing members/blades may be controlled. Also synchronization of the mowing members by controlling the motors of each mowing member is possible.
  • the control device 7 is shown to be present on the frame 4 of the mower 1 , near the coupling member 16 which will allow the motor to be coupled to a vehicle (not shown) and power to be lead onto the mower.
  • the vehicle usually is a tractor and the mower 1 is in de form of a cutter bar which is coupled to a three-point hitch to be pulled by the tractor across a field of crop to be mowed.
  • the mower may be part of a self-driving vehicle with a person driving the vehicle, or even an autonomously moving vehicle for which no person operating/driving it is necessary.
  • Power to drive the motors and feed the control device may be provided by battery 17 provided on the mower or by power cables (not shown) passing through coupling member 16 from a battery on the vehicle or from a so-called power take-off (PTO) generator.
  • PTO power take-off
  • the control device is provided with suitable electronics to be connected to the motors of the mower in order to control their rotation.
  • the control device may receive and send sensor and/or control signals to and from each motor.
  • the electric drive motors may be of the brushless motor type, e.g. an AC motor with a stator having wound coils and being supplied with an AC current and a rotor rotatably positioned inside the stator.
  • the rotor driving an output shaft which in turn drives the mowing member.
  • the rotor may be in the form of permanent magnets or electrical windings.
  • VFD Variable Frequency Drive
  • Types of vector control are Direct Torque Control (DTC) and Field Oriented Control (FOC).
  • DTC Direct Torque Control
  • FOC Field Oriented Control
  • the frequency of the current determines how fast the magnetic field will change and thus how fast the rotor (and output shaft) will rotate. This involves calculating the motor's magnetic flux and torque based on the measured voltage and current of the motor.
  • Defining a pre-defined position on the circular trajectory may be done by defining a point on the mower member, which upon rotation of the member describes a circular trajectory. After all the mowing member rotates about a central axis causing any point on the mowing member to follow a circle.
  • the mower 1 further includes a position location device 8 which is part of the control device to determine the actual position of the mowing member on the circular trajectory 6 and the control device 7 is arranged to control the motor to move the mowing member from the actual location to the pre-defined position.
  • the position location device 8 is provided on the motor 5 of each mowing member. Suitable data transmission hardware and software are provided for the data gathered by the position location devices 8 to sent to the control device 7, received by the control device and used to control the motor.
  • the mower the position location device 8 is an encoder 14, mounted onto the motor.
  • the encoder when mounted onto the motor as shown in figure 1 is typically an add-on encoder which once mounted can detect the angular position or motion of a shaft or axle and convert it into an analog or digital signal code, which is then transmitted to the control device.
  • the encoder can be used to determine this for the shaft driving the mowing member.
  • the encoder may be used to determine angular position or motion of the rotor of an electric motor relative to the stator and may be a position sensor inside the motor. These values can be used to determine the position of a mowing blade, after all the position of the mowing blade relative to the motor is known or may be derived from the dimensions form the mower, blade, mowing member and motor.
  • Position encoders are available in a large variety and may be operate mechanically, optically, magnetic or capacitively. According to the invention the term encoder must also be seen using Field Oriented Control instead of a position sensor, in which the magnitude and position of the rotor flux are determined in order to control the motor.
  • the pre-defined position may be chosen to be the position in which the mowing member is to be stopped on its circular trajectory.
  • Each mowing member 2 has at least one mowing blade 9 having a free outer end 10, which blade 9 in normal operating circumstances projects radially outwardly including a radial center line 1 1 which radial center line 1 1 extends from the rotation axis 3 outward and the free outer end 10 following a circular blade trajectory 12, and
  • each mowing member 2 is mounted to the frame 4 adjacent to another mowing member 4 such that the respective blade trajectories 12 define an overlap area 13 between them, and wherein a pre-defined stop position is chosen such is such that the radial line of the blade of the stopped mowing member does not intersect the overlap area.
  • FIG 1 the mowing members are shown in a manner in which the blades 9, 10 will never hit each other.
  • a capacitor 15 is provided with suitable connections to each motor. These connections may be the same as the ones that provided the motors with electricity.
  • the control device is arranged to stop rotation of the at least one mowing member by controlling the capacitor 15 to inject DC current into the motor to be stopped.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)

Abstract

L'invention concerne une faucheuse (1) comportant une pluralité d'éléments de fauchage (2), chaque élément de fauchage (2) étant monté rotatif autour d'un axe de rotation vertical (3) sur un support (4), et chaque élément de fauchage (2) comportant un moteur d'entraînement électrique (5) pouvant lui être couplé et conçu pour entraîner l'élément de fauchage (2) en rotation suivant une trajectoire circulaire (6) coaxiale à l'axe de rotation vertical (3), et la faucheuse (1) comportant en outre au moins un dispositif de commande (7) destiné à commander au moins l'un des moteurs d'entraînement électriques (5) pour déplacer l'élément de fauchage (2) vers une position prédéfinie sur sa trajectoire circulaire (6).
PCT/NL2017/050365 2016-06-21 2017-06-06 Faucheuse Ceased WO2017222368A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2017019 2016-06-21
NL2017019A NL2017019B1 (en) 2016-06-21 2016-06-21 Mower

Publications (1)

Publication Number Publication Date
WO2017222368A1 true WO2017222368A1 (fr) 2017-12-28

Family

ID=57104121

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2017/050365 Ceased WO2017222368A1 (fr) 2016-06-21 2017-06-06 Faucheuse

Country Status (2)

Country Link
NL (1) NL2017019B1 (fr)
WO (1) WO2017222368A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10687464B2 (en) 2017-01-12 2020-06-23 Briggs & Stratton Corporation Zero turn radius mower controls
US11437936B2 (en) 2018-07-16 2022-09-06 Briggs & Stratton, Llc Outdoor power equipment with distributed motor controllers
US11712001B2 (en) 2019-10-11 2023-08-01 Briggs & Stratton, Llc Electric motor for outdoor power equipment
US11925142B2 (en) 2019-10-11 2024-03-12 Ariens Company Electric motor and blade assembly for a lawn mower
EP4342280A1 (fr) * 2022-09-26 2024-03-27 Deere & Company Barre de coupe rotative avec capteur de lame
DE102023101091A1 (de) * 2023-01-18 2024-07-18 Amazonen-Werke H. Dreyer SE & Co. KG Schutzeinrichtung zum Aufscheuchen von Insekten und zum Einsatz an einem Mähwerk an einer Mähvorrichtung sowie Mähvorrichtung
US12145674B2 (en) 2018-03-26 2024-11-19 Briggs & Stratton, Llc Electric outdoor ride-on power equipment

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0126518A2 (fr) 1981-05-27 1984-11-28 C. van der Lely N.V. Faucheuse
US4497161A (en) 1981-07-17 1985-02-05 Multinorm, B.V. Mower
US5581985A (en) 1995-06-15 1996-12-10 Secosky; Paul M. Safety clutches for self power operated lawn mowers
EP0774202A1 (fr) 1995-11-17 1997-05-21 Deere & Company Dispositif porte-outil
US6591593B1 (en) * 2000-10-23 2003-07-15 Dennis Brandon Electric riding lawn mower powered by an internal combustion engine and generator system
US20060059879A1 (en) * 2004-09-20 2006-03-23 Edmond Brian W Multifunction electric tractor
US8327612B2 (en) 2007-10-14 2012-12-11 Lely Patent N.V. Mowing device
US20130152535A1 (en) * 2011-12-20 2013-06-20 Martin J. Roberge Modular electric disc cutterbar and controller
EP3025569A1 (fr) * 2014-11-26 2016-06-01 Braun Maschinenbau GmbH Gyrobroyeur

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0126518A2 (fr) 1981-05-27 1984-11-28 C. van der Lely N.V. Faucheuse
US4497161A (en) 1981-07-17 1985-02-05 Multinorm, B.V. Mower
US5581985A (en) 1995-06-15 1996-12-10 Secosky; Paul M. Safety clutches for self power operated lawn mowers
EP0774202A1 (fr) 1995-11-17 1997-05-21 Deere & Company Dispositif porte-outil
US6591593B1 (en) * 2000-10-23 2003-07-15 Dennis Brandon Electric riding lawn mower powered by an internal combustion engine and generator system
US20060059879A1 (en) * 2004-09-20 2006-03-23 Edmond Brian W Multifunction electric tractor
US8327612B2 (en) 2007-10-14 2012-12-11 Lely Patent N.V. Mowing device
US20130152535A1 (en) * 2011-12-20 2013-06-20 Martin J. Roberge Modular electric disc cutterbar and controller
EP3025569A1 (fr) * 2014-11-26 2016-06-01 Braun Maschinenbau GmbH Gyrobroyeur

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10687464B2 (en) 2017-01-12 2020-06-23 Briggs & Stratton Corporation Zero turn radius mower controls
US11425856B2 (en) 2017-01-12 2022-08-30 Briggs & Stratton, Llc Zero turn radius mower with cutting blade control
US12349621B2 (en) 2017-01-12 2025-07-08 Briggs & Stratton, Llc Zero turn radius mower with cutting blade control
US12145674B2 (en) 2018-03-26 2024-11-19 Briggs & Stratton, Llc Electric outdoor ride-on power equipment
US11437936B2 (en) 2018-07-16 2022-09-06 Briggs & Stratton, Llc Outdoor power equipment with distributed motor controllers
US11712001B2 (en) 2019-10-11 2023-08-01 Briggs & Stratton, Llc Electric motor for outdoor power equipment
US11925142B2 (en) 2019-10-11 2024-03-12 Ariens Company Electric motor and blade assembly for a lawn mower
EP4342280A1 (fr) * 2022-09-26 2024-03-27 Deere & Company Barre de coupe rotative avec capteur de lame
US12453307B2 (en) 2022-09-26 2025-10-28 Deere & Company Rotary cutter-bar with blade sensor
DE102023101091A1 (de) * 2023-01-18 2024-07-18 Amazonen-Werke H. Dreyer SE & Co. KG Schutzeinrichtung zum Aufscheuchen von Insekten und zum Einsatz an einem Mähwerk an einer Mähvorrichtung sowie Mähvorrichtung

Also Published As

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