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
  • 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
• • 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
  • A01B3/00—Ploughs with fixed plough-shares
  • A01B3/24—Tractor-drawn ploughs

Definitions

• This invention relates to a device at a plough compris ⁇ ing a plurality of plough bodies mounted vertically ad ⁇ justably on the plough frame obliquely one behind the other.
• Thw present invention has the object to propose a dev ⁇ ice, by which at ploughing with a plough of the kind referred to above in the introductory portion straight borderlines between the turn-lands and the ploughed area can be obtained.
• Fig. 1 is a perspective view of a conventional plough
• Fig. 2 is a correspond ⁇ ing view of a modified plough according to Fig. 1 with a schematically shown device according to the invention.
• OMPI The plough shown in a simplified way in Fig. 1 compris ⁇ es in known manner a plough frame 10 placed obliquely in the ploughing direction. A plurality of plough units 11 are attached on the frame. Each plough unit 11 com ⁇ prises a plough body 12, a plough beam 13 supporting the plough body, and a plough beam holder l mounted on the plough frame 10.
• each plough beam 13 is hingedly attached to the associated holder 14 via a link 15 and a release mechanism 16, so that the plough bodies when striking against such obstacle pivot rear ⁇ ward-upward and pass over the obstacle on its upper surface.
• the release mechanisms..16 consist of single-acting hydraulic cylinders, which via conduits 17 communicate with a hydraulic accumulator 18, which is intended to receive at maintained pre- -load the liquid volume forced aside by the cylinders when the plough strikes against an obstacle.
• Said cyl ⁇ inders also communicate with a schematically shown pressure source 19, which normally consists of the hydraulic unit of the traction vehicle (not shown) .
• border areas 20 remain unplough ⁇ edv (according to dashed lines in Fig. 1) between the
• OMPI ploughing pass 21 and the turn-land 22 of the traction vehicle due to the fact that at the arrival of the plough at the turn-land 22 all plough bodies are lifted simultaneously.
• Corresponding unploughed areas are obt ⁇ ained also at the opposed ends of the ploughing pass 21 when all plough bodies are lowered into the ground sim ⁇ ultaneously (not shown).
• these areas 20 must be re-ploughed over a width corresponding to the total plough body distance of the plough, which implies at least two extra plough passes at every turn-land.
• Fig. 2 a modified plough according to Fig. 1 is shown, which is provided with a schematically shown hydraulic arrangement 30 according to the invention, by means of which uniform borderlines between plough furrows and turn-lands are obtained, so that all ridges of each plough pass 21 can be started (not shown) and completed on a borderline 24 to the turn-land 22 which is perpendicular to the ploughing direction.
• the plough proper according to Fig. 2 differs from the plough shown in Fig. 1 substantially only, in that the conventional release mechanisms with maintained release function are replaced by double-acting hydraulic cylind ⁇ ers 26.
• the hydraulic arrangement 30 coupled-in with the hydr ⁇ aulic cylinders 26 has the structural design as follows.
• a hydraulic pump 31 which may be located in the tract ⁇ ion vehicle, and a volume flow regulator 32 are coupled- -in.
• the pressure conduit 33 is branched off to a hydr ⁇ aulic accumulator 34 via a throttle valve 35 and a stop valve 36 coupled-in parallel with the throttle valve 3 ,
• the pressure conduit 33 further is branched off to the pressure connections of 4/2 direct ⁇ ional valves for the respective cylinders 26, in such a manner, that the directional valve 37 (1) for the cyl ⁇ inder 26 (1) foremost in the ploughing direction is coupled-in directly with the pressure conduit 33 (1) . while in each of the pressure conduits 33 (2-4) for the remaining directional valves adjustable sequential valves 38 (2-4) with stop valves 39 connected in par ⁇ allel are coupled-in, which stop valves block in the pressure direction of the pump.
• a return conduit 40 common to all ret ⁇ urn conduits is coupled-in to a tank 4l.
• Each valve 37 is connected at the outlet ends to the two ends of the associated hydraulic cylinder 26 through conduits 27 and 28, respectively.
• the plough and the hydraulic arrangement 30 are intend ⁇ ed to co-operate as follows.
• a plough according to the invention operates in the same way as a conventional plough.
• the ploughman adjusts the elec ⁇ tronically controlled directional valves 37 (1-4) to the position shown in Fig. 2. In this position all cond ⁇ uits 27 are coupled-in with the pressurer conduits 33- The foremost plough body 12..(1) hereby is lifted immedi ⁇ ately to the position according to Fig. 2 when the hydraulic liquid through the conduit 27 presses in the associated piston rod to the entirely retracted posit ⁇ ion.
• the next following sequential valve 38 (3) is adjusted to an opening pressure higher than the preceding one, so that the directional valve 38 (3) ' opens after the time having passed from the moment when the second plough body 12 (2) has started the liftings -up movement until the third plough body 12 (3) arrives at the borderline 24.
• the last sequential valve 38 (4) finally is adjusted to a still higher opening pressure, so that it opens first when the last plough body 12 (4) arrives at the borderline 24.
• the plough frame 10 in known manner may require to be lifted for a greater ground clearance; in the case when it is supported by means of the draw-bars and top or pressure bar of the traction vehicle (not shown), in the case when it is partially supported or towed in addition and, respectively, only by elevating the frame axles of the supporting wheels (not shown) .
• the plough frame 10 Prior to ploughing from a turn-land, the plough frame 10 again is lowered with all plough bodies in their swung-up positions.
• the ploughman adjusts all directional valves 37 (1-4) to the position opposed to- the position shown in Fig. 2.
• the plough bodies are lowered in a corresponding way and in the same order as described above for their li ting-up movement, so that all plough bodies 12 (1-4) also start the ploughing on a common line perpendicular to the ploughing direction.
• the hydraulic arrangement can be completed with additional cylinders 26, directional valves 37 and sequ ⁇ ential valves 38 with associated stop valves 39 and conduits.
• the sequential valves 38 and stop valves 39 can be abolished entirely while all pressure cond ⁇ uits 33 are coupled-in directly with associated direct ⁇ ional valves 37.
• valves in such a case can be ad ⁇ justed, for example, from an electronic sequential con ⁇ trol, which emits adjusting signals at time intervals, which can be adjusted to the normal speed of the tract ⁇ ion vehicle, but which also can be controlled by a speed or path transmitter coupled-in with a wheel of the traction vehicle, whereby variations in the speed of the plough (not shown) automatically can be compens ⁇ ated for.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Soil Sciences (AREA)
• Environmental Sciences (AREA)
• Zoology (AREA)
• Prostheses (AREA)
• Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
• Epoxy Compounds (AREA)
• Cleaning Of Streets, Tracks, Or Beaches (AREA)
• Lifting Devices For Agricultural Implements (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=20349052

Family Applications (1)

Country Status (3)

Cited By (5)

Citations (1)

• 1982
  • 1982-12-17 SE SE8207234A patent/SE444103B/sv unknown
• 1983
  • 1983-12-16 EP EP84900151A patent/EP0128931A1/en not_active Withdrawn
  • 1983-12-16 WO PCT/SE1983/000461 patent/WO1984002250A1/en unknown

Patent Citations (1)

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