GB1439656A - Agricultural vehicle having an electro-hydraulic power lift - Google Patents

Agricultural vehicle having an electro-hydraulic power lift

Info

Publication number
GB1439656A
GB1439656A GB3110973A GB3110973A GB1439656A GB 1439656 A GB1439656 A GB 1439656A GB 3110973 A GB3110973 A GB 3110973A GB 3110973 A GB3110973 A GB 3110973A GB 1439656 A GB1439656 A GB 1439656A
Authority
GB
United Kingdom
Prior art keywords
electro
relay
links
valve
draft links
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.)
Expired
Application number
GB3110973A
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of GB1439656A publication Critical patent/GB1439656A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

1439656 Vehicle electro hydraulic power lift systems KLOCKNER-HUMBOLDTDEUTZ AG 29 June 1973 [6 July 1972] 31109/ 73 Heading A1P An electro-hydraulic power lift for a vehicle has two lower draft links 8 each adjustable by jacks 15 so that any desired vertical height ratio between the two links can be. electrically selected and this ratio maintained by an electro-hydraulic control device throughout the range of control of the lift system. The links 8 are connected to variable resistances 52 and 53 (Fig. 5) forming part of a bridge circuit 52, 53, 54 and 55 with a current source 56. The desired vertical height ratio of the draft links 8 is selected on the variable resistance 55. Any variation in height ratio of the links relative to that selected at 55 will result in a voltage difference between points 57 and 58 which is fed to a relay 59 which actuates an electro-hydraulic valve 60 to supply fluid from the pump 71 to the jacks 15 to restore the height ratio selected. The bridge circuit 52-55 includes resistors 62 and 63 of identical value and their junction 61 is connected through the winding of a relay 67 to the slider 66 of a potentiometer 64, 65 also connected across the current source 56. Since resistors 62 and 63 are of equal value the potential at the junction 61 corresponds to the mean height of the two draft links 8. The slider 66 is set to a value equivalent to the desired mean height of the draft links. Any difference in voltage between the point 61 and the slide 66 will operate the relay 67 which actuates the electro-hydraulic valve 68 to supply fluid from the pump 71 to the jacks 15 so that the mean height of the two draft links is restored to that selected by the slider 66. The relay 59 that supplies current for the valve 60 also supplies current to a relay 70. Operation of the relay 70 ensures no current is fed to the valve 68 while the valve 60 is being operated..
GB3110973A 1972-07-06 1973-06-29 Agricultural vehicle having an electro-hydraulic power lift Expired GB1439656A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722233174 DE2233174A1 (en) 1972-07-06 1972-07-06 FARMING TRACTOR OR UNIVERSAL AGRICULTURAL MACHINE WITH ELECTRO-HYDRAULIC POWER LIFT

Publications (1)

Publication Number Publication Date
GB1439656A true GB1439656A (en) 1976-06-16

Family

ID=5849869

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3110973A Expired GB1439656A (en) 1972-07-06 1973-06-29 Agricultural vehicle having an electro-hydraulic power lift

Country Status (3)

Country Link
DE (1) DE2233174A1 (en)
FR (1) FR2191831B1 (en)
GB (1) GB1439656A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4231432A (en) * 1978-09-22 1980-11-04 International Harvester Company Position and draft control system for plows
FR2500987A1 (en) * 1981-03-04 1982-09-10 Massey Ferguson Services Nv DEVICE FOR CONTROLLING THE HITCHING SYSTEM OF A TRACTOR, SUCH AS AN AGRICULTURAL TRACTOR
US4413685A (en) * 1979-12-11 1983-11-08 Gremelspacher Philip E Planter implement with adjusting position-display apparatus and system thereof
GB2123670A (en) * 1982-07-16 1984-02-08 Kubota Ltd Controlling implements on three-point linkages
GB2187375A (en) * 1986-02-21 1987-09-09 Iseki Agricult Mach Control apparatus for ground treating devices
WO2008065237A1 (en) * 2006-10-16 2008-06-05 Lh Lift Oy Front lifting device for a tractor and method for operating a tractor's front lifting device

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7701445A (en) * 1977-02-11 1978-08-15 Lely Nv C Van Der TRACTOR.
FR2539575B2 (en) * 1979-02-16 1985-08-16 Lemoine Mecano Soudure "THREE POINT" HITCH THAT CAN BE USED AS WELL BEFORE AS AT THE BACK OF AN INDUSTRIAL, AGRICULTURAL VEHICLE, FOR PUBLIC WORKS, OR FORESTRY, FOR EXAMPLE A TRACTOR
JPS5968013U (en) * 1983-05-13 1984-05-08 ヤンマー農機株式会社 Horizontal control device for rotary work equipment
JPS5968012U (en) * 1983-05-13 1984-05-08 ヤンマー農機株式会社 Horizontal control device for agricultural machinery
FR2568087B1 (en) * 1984-07-24 1987-03-20 Defrancq Hubert DEVICE FOR CONTROLLING THE POSITION OF AN AGRICULTURAL TOOL LIFTING SYSTEM
AT386721B (en) * 1987-05-25 1988-10-10 Steyr Daimler Puch Ag LIFT FOR TOWERS
US5957218A (en) * 1997-11-18 1999-09-28 Deere & Company Electrohydraulic control of implement lift cylinders
EP1018292B8 (en) * 1999-01-09 2005-06-29 GKN Walterscheid GmbH Tractor hitch lower link lifting device
DE102009016919A1 (en) * 2009-04-08 2010-10-21 Jetter Ag Control of a lifting device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4231432A (en) * 1978-09-22 1980-11-04 International Harvester Company Position and draft control system for plows
US4413685A (en) * 1979-12-11 1983-11-08 Gremelspacher Philip E Planter implement with adjusting position-display apparatus and system thereof
FR2500987A1 (en) * 1981-03-04 1982-09-10 Massey Ferguson Services Nv DEVICE FOR CONTROLLING THE HITCHING SYSTEM OF A TRACTOR, SUCH AS AN AGRICULTURAL TRACTOR
GB2123670A (en) * 1982-07-16 1984-02-08 Kubota Ltd Controlling implements on three-point linkages
GB2187375A (en) * 1986-02-21 1987-09-09 Iseki Agricult Mach Control apparatus for ground treating devices
GB2187375B (en) * 1986-02-21 1989-12-13 Iseki Agricult Mach Control apparatus for ground treating devices
WO2008065237A1 (en) * 2006-10-16 2008-06-05 Lh Lift Oy Front lifting device for a tractor and method for operating a tractor's front lifting device

Also Published As

Publication number Publication date
FR2191831B1 (en) 1976-04-30
FR2191831A1 (en) 1974-02-08
DE2233174A1 (en) 1974-01-24

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee