Classifications

• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01D—HARVESTING; MOWING
  • A01D57/00—Delivering mechanisms for harvesters or mowers
  • A01D57/24—Grass-boards
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01D—HARVESTING; MOWING
  • A01D67/00—Undercarriages or frames specially adapted for harvesters or mowers; Mechanisms for adjusting the frame; Platforms
  • A01D67/005—Arrangements of coupling devices

Definitions

• the invention relates to a mower for the harvesting of grass crops comprising driven cutter means for cutting the crop in a determined pass width, a drawbar centre-pivoted with respect to the pass width of the mower and pivotally connected with the lift arms of a tractor, a motive power transferring transmission unit connected with the motive power take-off of the tractor and extending longitudinally of the drawbar, and a shielding device facing backwards in the direction of travel to define a discharge opening for the discharge of cut crop in a windrow with a swath width that is substantially smaller than the pass width.
• the cut crop is discharged in parallel windrows which in a subsequent operation are collected and processed by a crop pickup attachment, e.g. a field chopper designed as exact cutter with an associated rotary collecting rake, and transferred to a collecting truck by a conveyor.
• a crop pickup attachment e.g. a field chopper designed as exact cutter with an associated rotary collecting rake
• the crop is discharged from the central region of the pass width of the cutter in a windrow having a swath width of e.g. 75 cm with respect to the pass width ranging typically from 2 to 3 m.
• the mower While travelling in one direction the mower passes on the left side of the tractor and while travelling in the other direction the mower is passed on its right- hand side. In both directions of travel the mower is positioned substantially in the same lateral and rearwardly located position in relation to the tractor, i.e. substantially at constant lateral separation between tractor and mower. Thereby, the windrows will be discharged at the same mutual distance corresponding to the pass width of the mower and at the subsequent collection of the crop the field is run over substantially according to the same principle so that the crop pickup attachment that is likewise towed behind and sidewise relative to the tractor collects one windrow at a time.
• Applicant's Danish patent application No. 5590/86 suggests a design of a crop collecting attachment with increased pass width for the collection of two windrows in the same operation.
• the object of the present invention is to provide a mower allowing of optimizing its pass width to a value equal to or larger than the pickup width of two parallel windrows.
• a mower according to the invention is characterized in that the shielding device is designed so that the discharge opening is disposed asymmetrically with respect to the pass width of the mower, substantially within an area of the pass width which at one side is delimited by the centre line of the mower in the direction of travel and at the other side is delimited by the fact that the distance to the nearest extreme limit of the pass width is at least equal to half the difference between the external track width of the tractor and the swath width.
• the same pass width for the mowing and crop collection is obtained irrespective of the swath width so that the pass width of both implements may be optimized to the allowable maximum value with respect to travelling on roads.
• the discharge opening by displacement towards the second limitation of the above mentioned range of positioning is placed more asymmetrically, e.g. in the middle of one half of the pass width at a distance of 10 to 15% of the patss width from the centre line, and the external delimitation of the pass width
• the harvesting by the mower according to the invention may provide for collecting, in dependence on the track width of the tractor and the discharge width, two windrows in one operation by a conventionally performed crop pickup attachment.
• the pass width of the mower may constitute about 125% of the pickup width so that at a pass width of e.g. 280 cm between two windrows having a swath width of e.g. 70 cm may be collected in one operation with a pickup width of only 210 cm, provided the external track width of the tractor does not exceed 140 cm.
• the drawbar is provided with an asymmetric deflection relative to the centre line of the mower so as to provide between the lateral distance of the centre line from the coupling point of the drawbar to the tractor by deflection to one side and the corresponding distance by deflection to the other side, a difference corresponding to the difference between the largest and the smallest distance between parallel windrows minus the width of the swath.
• FIG. 1 is a field diagram illustrating harvesting by means of an embodiment of the mower according to the invention.
• Fig. 2 shows the embodiment in Fig. 1, viewed from above on a larger scale
• Fig. 3 is a view corresponding to Fig. 1 of an alternative embodiment
• Fig. 4 is a simplified diagram illustrating a crop laid in swaths according to the embodiment in Fig.
• Fig. 5 is an embodiment with an asymmetric deflection of the drawbar of the mower relative to the centre line.
• Fig. 1 the area 1 illustrated in single hatching lines designates the part of a field crop not yet cut, e.g. grass, while 2 designates the cut part of the field on which the crop is laid in parallel windrows 3 to 6.
• the mowing operation is effected by means of a mower 8 towed by a tractor 7, e.g. a disc mowing machine connected with tractor 7 via a towing and motive power transferring transmission device 9 pi votally connected with tractor 7 and mower 8, and in order to obtain the maximum movabil ity and range of mower 8 in relation to tractor 7
• said device may be designed as illustrated and explained in Applicant's Danish patent application No. 2411/85, preferably with hydraulic power transfer between a hydraulic pump coupled to the power take-off of tractor 7 and a hydraulic motor mounted on mower 8 as drive means for the driven cutting means of the mower.
• mower 8 In order to delimit the swath width in which the crop is discharged from mower 8 in windrows 3 to 6, mower 8 is provided with a rearwardly extending shielding device 10, for instance composed of plate shields, as illustrated in Fig. 2, said device being according to the invention designed so that the crop discharge opening 11 is asymmetrically positioned in relation to the pass width A of the mower and substantially within an area of the pass width A that is defined to one side by the centre line C of mower 8 in the travelling direction and to the other side by the fact that the distance D from discharge opening 11 to the nearest external limitation of the pass width A is substantially equal to half the difference between the maximum external track width T of tractor 7 and the swath width B determined by discharge opening 11.
• a rearwardly extending shielding device 10 for instance composed of plate shields, as illustrated in Fig. 2
• the device being according to the invention designed so that the crop discharge opening 11 is asymmetrically positioned in relation to the pass width A of the mower and substantially within an area of the pass width A that is defined
• FIG. 1 illustrates tractor 7 and mower 8 while cutting a path into swaths at the edge of the uncut part 1 of the field.
• the direction of travel is from the right to the left in the figure and mower 8 is towed by transmission device 9 in an obliquely rearwards position and to the right of tractor 7 such that tractor 7 runs over windrow 5 discharged by the preceding pass of the field, windrow 6 being thereby discharged in parallel thereto by mower 8.
• the dotted positions 7', 8' and 7", 8", respectively, illustrate the positions occupied by tractor 7 and mower 8 during the two immediately preceding field passes.
• This laying In swaths provides for effecting the collection of windrows 3 to 6 pairwise by means of a crop collecting attachment 13 towed by a tractor 12 and coupled thereto through a towing and motive power transferring transmission unit 14, designed as shown and explained in the above mentioned Danish patent application No. 5590/86, said design allowing increased pickup width.
• This provides for increasing the pass width of both implements to the allowable maximum width when travelling on roads, e.g. 3 m.
• the necessary number of field passes during the collection of the crop is hereby reduced to about the half and the pass width of the mower is simultaneously optimized to the maximum cutting capacity.
• the discharge opening 17 of shielding device 16 of mower 15 may be provided substantially in the middle of one half of the pass width A.
• Drawbar 9 is pivotally connected with mower 8 in a swivel link 22 mounted in the middle of the mower frame 23. At a short distance from swivel link 22 drawbar 9 is pivotally connected in a joint 24 with one end of a piston 25 in a working cylinder 26 pivotally mounted on a bracket 27 firmly connected with frame 23.

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=8116768

Family Applications (1)

Country Status (2)

Cited By (2)

Families Citing this family (1)

Citations (9)

• 1987
  • 1987-06-04 DK DK288387A patent/DK166424C/da not_active IP Right Cessation
• 1988
  • 1988-06-06 WO PCT/DK1988/000088 patent/WO1988009610A1/en unknown

Patent Citations (9)

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