EP0186696A1 - Feldhäcksler - Google Patents

Feldhäcksler

Info

Publication number
EP0186696A1
EP0186696A1 EP85903229A EP85903229A EP0186696A1 EP 0186696 A1 EP0186696 A1 EP 0186696A1 EP 85903229 A EP85903229 A EP 85903229A EP 85903229 A EP85903229 A EP 85903229A EP 0186696 A1 EP0186696 A1 EP 0186696A1
Authority
EP
European Patent Office
Prior art keywords
ground
cutting head
forage harvester
strain gauge
pressure
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.)
Withdrawn
Application number
EP85903229A
Other languages
English (en)
French (fr)
Inventor
Borge Larsen
Arne Riis
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.)
Maskinfabriken Taarup AS
Original Assignee
Maskinfabriken Taarup AS
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 Maskinfabriken Taarup AS filed Critical Maskinfabriken Taarup AS
Publication of EP0186696A1 publication Critical patent/EP0186696A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D41/00—Combines, i.e. harvesters or mowers combined with threshing devices
    • A01D41/12—Details of combines
    • A01D41/14—Mowing tables
    • A01D41/141—Automatic header control

Definitions

  • the invention relates to a forage harvester of the type defined in the introductory portion of claim 1.
  • a forage harvester makes it po'ssible automatically .to keep the height of the cutting head above the ground and thus the stubble height essentially constant, ir ⁇ respective of irregularities in the surface of the ground.
  • the US Patent Specification 2 750 727 discloses a forage harvester of the present type, where the ground engaging means are formed by slide shoes mounted on a rotatable shaft.
  • An adjustable link mechanism connects this shaft to an arm which, in one embodiment, can be caused to contact one or the other of two contact means and thus actuate an electric motor to raise or lower the cutting head, and which, in another embodiment, actuates a hydraulic valve inserted in an oil line which shunts a hydraulic cylinder- to raise and lower the cutting head, thus varying the oil pressure in the cylinder and thereby the height of the cutting head above the ground.
  • the object of the invention is to provide a forage harvester of the present type whose height adjusting mechanism is more sturdy and can thus cope better with the tough working conditions to which it is subjected than the prior art ones, and which moreover responds more quickly to irregularities in the surface of the ground than the prior art height adjusting mechanisms.
  • the forage harvester is constructed as stated in the characterizing portion of claim 1 since, in this structure, pressure sensing and control of the height adjusting mechanism take place without any use of moving members, viz. by means of a firmly mounted strain gauge, which moreover responds instantaneously to any change in the pressure of the ground engaging means against the ground.
  • Claims 2 and 3 define various possibilities for the mounting of the strain gauge, and simple embodiments of the means for controlling the height adjusting mechanism, when this is formed by a hydraulic cylinder, are defined in claims 4 and 5.
  • fig. 1 is a schematic side view of an embodiment of the forage harvester of the invention, coupled to a tractor,
  • fig. 2 is a section along the line II-II in fig. 1, and
  • fig. 3 is a diagram of an electric -hydraulic control system.
  • the numeral 10 designates a forage harvester in the form of a windrower which is coupled to a tractor 11.
  • the windrower has a cutting head with a beam 12 suspended between two gable members 20; the beam rotatably mounts a plurality of disc-shaped cutters 13, here four, which are caused to rotate in a generally known, not shown manner during travel.
  • the windrower has two ground wheels 14 mounted on the outer end of their respective pivot arms 15.
  • a hydraulic cylinder 16 is mounted between each pivot arm and the frame of the windrower to raise and lower the windrower with respect to the wheels.
  • Each cylinder is connected with an oil/air accumulator 17 mounted directly on the cylinder.
  • FIG. 1 shows a strain gauge 21 placed on the top side of a slide shoe 18, and, in response to any change in the pressure of the slide shoe against the ground, the strain gauge applies an electric signal depending upon the size of the pressure change.
  • the strain gauge 21 is connected to an amplifier 42 with two outputs, which are in turn connected to electromagnets in their respective ones of two magnet valves 43 and 44. These valves, when actuated, connect the cylinder 16 with an oil supply conduit 32 and a reservoir 35, respectively.
  • the amplifier 42 is so arranged as to actuate, upon actuation of the strain gauge- 21 in one or the other direction from an average state corresponding to the desired pressure against the slide shoe, one or the other, respectively, of the two magnet valves 43 and 44 with a view to supply and discharge, respectively, of oil to and from the hydraulic cylinder to raise and lower, respectively, the cutting head until the desired engagement pressure has been re ⁇ established.
  • the magnet valves 43 and 44 may be either cut-off or regulating valves.
  • the details of the shown and described structure may be varied in many ways. As examples of readily performed changes may be mentioned that the shown relatively narrow slide shoes may be replaced by two disc-shaped shoes, each of which extends approximately half the width of the machine. Also wheels may be used instead of slide shoes. Moreover, instead of a single strain gauge, two might be used, which are actuated upon deviation in their respective directions from the desired average state of the deformable machine member. The strain gauge might also be placed on other machine members than a slide shoe, e.g. as shown at 22 in fig. 2 on one of the gable members 20.
  • An additional possibility is the mounting of the cutting head in the' frame in such a manner that the head is movable vertically by means of the hydraulic cylinders, instead of moving the entire machine frame up and down.
  • the hydraulic cylinders might be replaced by other forms of height adjusting means, e.g. mechanical jacks driven by electric motors whose power supply is controlled by the amplifier 42.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)
  • Led Devices (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
EP85903229A 1984-06-15 1985-06-14 Feldhäcksler Withdrawn EP0186696A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK293184A DK293184A (da) 1984-06-15 1984-06-15 Groenthoester
DK2931/84 1984-06-15

Publications (1)

Publication Number Publication Date
EP0186696A1 true EP0186696A1 (de) 1986-07-09

Family

ID=8117264

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85903229A Withdrawn EP0186696A1 (de) 1984-06-15 1985-06-14 Feldhäcksler

Country Status (6)

Country Link
EP (1) EP0186696A1 (de)
AU (1) AU4543985A (de)
DK (1) DK293184A (de)
FI (1) FI860575A (de)
NO (1) NO860555L (de)
WO (1) WO1986000002A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110915413A (zh) * 2019-11-07 2020-03-27 深圳市俊达通办公智能科技有限公司 一种用于园林园艺的具有调节功能的除草设备

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58159409A (ja) * 1982-03-03 1983-09-21 サンテツク・インコポレイテツド 傷の治療剤としてのペルフルオロカ−ボンの使用
FR2642797B1 (fr) * 1989-01-10 1991-05-17 Secmair Dispositif d'asservissement de la pression d'appui au sol d'un rouleau equipant une tete de coupe, notamment de fauchage
DE4021496A1 (de) * 1990-07-05 1992-01-09 Claas Saulgau Gmbh Kreiselmaehwerk zum frontanbau an schlepper
GB9100609D0 (en) * 1991-01-11 1991-02-27 Altimeter The Trust Mowers
US6060852A (en) * 1993-06-11 2000-05-09 Harmonic Design, Inc. Head rail-mounted actuator for window covering
US5729103A (en) * 1993-06-11 1998-03-17 Harmonic Design, Inc. Head rail-mounted actuator for window coverings
US5698958A (en) * 1993-06-11 1997-12-16 Harmonic Design, Inc. Head rail-mounted actuator for window coverings
GB9519565D0 (en) * 1995-09-26 1995-11-29 Ford New Holland Nv Apparatus for controlling a position-adjustable implement
FR2758938B1 (fr) 1997-02-03 1999-04-23 Kuhn Sa Reglage automatique de l'allegement d'une unite de travail d'une machine : procede, dispositif et machine
IT1295202B1 (it) * 1997-09-29 1999-05-04 Guaresi S P A Apparato per il controllo automatico dell'interferenza col terreno degli organi di raccolta di una macchina raccoglitrice di pomodori o
US6056962A (en) * 1998-08-04 2000-05-02 Kesharlal; Biyani Milind Isolation and formulations of nutrient-rich carotenoids
DE29907728U1 (de) * 1999-04-30 2000-09-14 Duecker Gerhard Gmbh & Co Kg Mähgerät
DE102004032065A1 (de) * 2004-07-01 2006-02-16 Claas Selbstfahrende Erntemaschinen Gmbh Stützradmechanismus an einem Vorsatzgerät
BE1023154B1 (nl) * 2015-10-14 2016-12-02 Cnh Industrial Belgium Nv Dubbel maaiergeheel

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2261558C3 (de) * 1972-12-15 1982-07-08 Maschinenfabrik Fahr Ag Gottmadingen, 7702 Gottmadingen Elektrohydraulische Steuerung für die Höhenverstellung des Mähtisches eines Mähdreschers oder einer vergleichbaren Erntemaschine
GB1459684A (en) * 1973-06-14 1976-12-22 Clayson Nv Agricultural machines
US4437295A (en) * 1981-04-08 1984-03-20 International Harvester Co. Automatic header height control

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8600002A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110915413A (zh) * 2019-11-07 2020-03-27 深圳市俊达通办公智能科技有限公司 一种用于园林园艺的具有调节功能的除草设备

Also Published As

Publication number Publication date
FI860575A0 (fi) 1986-02-07
WO1986000002A1 (en) 1986-01-03
AU4543985A (en) 1986-01-10
FI860575A (fi) 1986-02-07
DK293184D0 (da) 1984-06-15
NO860555L (no) 1986-02-14
DK293184A (da) 1985-12-16

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19860211

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17Q First examination report despatched

Effective date: 19870722

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19871203

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LARSEN, BORGE

Inventor name: RIIS, ARNE