The invention relates in general to agricultural combines. It relates particularly to a corn harvesting header assembly having row units for use with an agricultural combine.
A corn harvesting header assembly or cornhead for an agricultural combine typically comprises a series of row units which are identical to each other. Each row unit includes a pair of snapping rolls having a snapping slot formed between them. Gathering chains having gathering fingers guide corn stalks into the snapping slot. The snapping rolls pull the corn stalks through the snapping slot and the ears are removed from the stalks as they come into engagement with opposed edges of stripper plates which bracket the slot between the gathering chains and the snapping rolls.
It is conventional for at least one of the two stripper plates to be mounted on the row unit frame for movement toward and away from the other plate. This movement permits the gap between the opposed stripping edges to be varied to accommodate different corn crops and crop conditions. Adjustment of the gap is typically accomplished by an adjusting mechanism including an actuation lever coupled to the adjustable stripper plate.
Despite having the adjusting mechanism, ears of corn can be susceptible to “butt” shelling. Butt shelling refers to the amount of corn kernels shelled from the ends of ears of corn as the corn ears are removed from their respective corn stalks. Although the loss of corn kernels is undesirable, it is unfortunately becoming a more prevalent characteristic of developing corn varieties. Operators must balance the loss of corn kernels associated with shelling with suitable harvesting capacity. Making matters worse, while the lost corn kernels can be viewed from the operator cab, the operator cannot objectively measure the amount and/or rate of lost corn kernels. Therefore, the operator's adjustments are based on guessing.
Therefore a cornhead row unit providing an objective measurement of corn kernels lost during shelling would be highly desirable.
Other features and advantages of the present invention will be apparent from the following more detailed description of the preferred embodiment, taken in conjunction with the accompanying drawings which illustrate, by way of example, the principles of the invention.
The present invention relates to a cornhead row unit including first and second longitudinally extending stripper plates mounted on a frame and having opposed stripping edges which define a gap between them. The frame further includes an adjusting arrangement operatively connecting the frame and at least one of the first and second stripper plates to selectably and transversely move at least one of the first stripper plate and second stripper plate with respect to the other stripper plate to vary the width of the gap. A loss detection device is operatively connected to the frame for permitting measurement of corn kernels lost as a result of drawing corn stalks through the gap to separate corn ears from the stalks.
The present invention further relates to a harvester including a cornhead row unit including first and second longitudinally extending stripper plates mounted on a frame and having opposed stripping edges which define a gap between them. The frame further including an adjusting arrangement operatively connecting the frame and at least one of the first and second stripper plates to selectably and transversely move at least one of the first stripper plate and the second stripper plate with respect to the other stripper plate to vary the width of the gap. A loss detection device is operatively connected to the frame for permitting measurement of corn kernels lost as a result of drawing corn stalks through the gap to separate corn ears from the stalks.
The present invention yet further relates to a method for reducing a loss of corn kernels associated with corn shelling by a harvester. The method includes providing a cornhead row unit comprising first and second longitudinally extending stripper plates mounted on a frame and having opposed stripping edges which define a gap between them. The method further includes providing an adjusting arrangement operatively connecting the frame and at least one of the first and second stripper plates to selectably and transversely move at least one of the first stripper plate and the second stripper plate with respect to the other stripper plate to vary the width of the gap. The method further includes shelling corn by drawing corn stalks through the gap to separate corn ears from corn stalks and detecting the amount of lost corn kernels associated with shelling corn. The method further includes actuating the adjusting arrangement to vary the width of the gap between the first and second stripper plates.
Other features and advantages of the present invention will be apparent from the following more detailed description of the preferred embodiment, taken in conjunction with the accompanying drawings which illustrate, by way of example, the principles of the invention.
Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
Referring now to the drawings, and particularly to
As shown, header assembly 12 illustrated contains four row units 16, which harvest four rows of corn simultaneously. In other embodiments, the number of rows of corn that may be harvested may be different than four. An exemplary corn plant 11 having a corn stalk 13 and ears of corn or corn ears 15 having corn kernels 17 is shown. The ears of corn are stripped from each of the four rows by a row unit 16 and then carried by an auger 18 in a trough 20 of a header assembly 12 to a feeder assembly 14. Feeder assembly 14 carries the collected corn ears rearwardly and upwardly into a threshing assembly (not shown) in the body of combine 10.
Referring collectively to
Each row unit 16 comprises a U-shaped frame 22 having legs 24, 26 on which each leg 24, 26 a gathering chain assembly (not shown) is mounted for endless circulation in paths parallel to each other. See U.S. Pat. No. 6,237,342, filed Sep. 19, 2002 (Becker), which is incorporated by reference in its entirety. The gathering chain assemblies each of which includes a series of gathering fingers (not shown) are designed to draw the stalks 13 (not shown) into a gap 28 defined between opposed edges 30, 32 of plates or stripper plates 34, 36, respectively. Snapping rolls 38 (
The gathering fingers of the gathering chain assembly (not shown) carry the stripped ears of corn rearwardly into trough 20. There the ears of corn are deposited and conveyed by auger 18 to feeder assembly 14. The stripped corn stalks are pulled through row unit 16 as feeder assembly 14 moves on through the field, with the stalks being left in the field.
In an exemplary embodiment, stripper plates 34, 36 are of substantially identical construction. Their opposed edged 30, 32, respectively, define gap 28. Stripper plate 34 is bolted through slots 40 in leg 24 of U-shaped frame 22. The bolted or otherwise mechanically-fastened connections through respective slots 40 of plate 34 permit plate 34 to move in a substantially transverse direction relative to leg 24, such as in a direction 54. Edge 30 of plate 34 is urged toward edge 32 of plate 36 by an adjusting arrangement 42, such as springs. In another embodiment, adjusting arrangement 42 for urging movement of at least one of edges 30, 32 of respective plates 34, 36 in transverse direction 54 toward and/or away from each other can be powered by hydraulics, mechanical linkages, electrical devices or other suitable apparatus as is well known. It is to be understood that the fluid ram may be in fluid communication with a fluid system operating at an adjustable pressure level that is capable of providing a range of forces as required by the field conditions. In one embodiment the fluid system pressure level may be controlled remotely from plates 34, 36, such as the combine cab, for convenience of the operator.
As shown in
It is to be understood that the term lost corn kernels or loss of corn kernels or the like is intended to refer to corn kernels separated from ears of corn during shelling of the corn by the row units in a manner as previously described.
As further shown in
As further shown
In operation, loss detection device 44 detects or permits measurement of a loss of corn kernels as a result of corn shelling by row unit 16 as previously discussed. Loss detection device 44 generates a signal in response to contact with lost corn kernels, permitting detection and measurement of the amount of the lost corn kernels. In response to an operator being alerted such as by operator notification device 48, the operator may selectably control (increase or decrease) the gap between plates 34, 36 (
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims.
Number | Name | Date | Kind |
---|---|---|---|
2604749 | Fergason | Jul 1952 | A |
2618113 | Hyman | Nov 1952 | A |
3101579 | Karlsson et al. | Aug 1963 | A |
3126690 | Keller et al. | Mar 1964 | A |
3262255 | Karlsson et al. | Jul 1966 | A |
3271940 | Ashton et al. | Sep 1966 | A |
3610252 | Coene et al. | Oct 1971 | A |
3707833 | Sutton | Jan 1973 | A |
3858384 | Maiste et al. | Jan 1975 | A |
RE31064 | Shriver | Oct 1982 | E |
4490964 | Eldredge | Jan 1985 | A |
4540003 | Osselaere | Sep 1985 | A |
5015997 | Strubbe | May 1991 | A |
5046362 | Strubbe | Sep 1991 | A |
5060464 | Caron | Oct 1991 | A |
5680750 | Stefl | Oct 1997 | A |
5878559 | Cooksey et al. | Mar 1999 | A |
6226969 | Becker | May 2001 | B1 |
6237312 | Becker | May 2001 | B1 |
6342006 | Bauch et al. | Jan 2002 | B1 |
6475082 | Visagie | Nov 2002 | B2 |
6591145 | Hoskinson et al. | Jul 2003 | B1 |
6839616 | Beck | Jan 2005 | B2 |
7001267 | Behnke et al. | Feb 2006 | B2 |
7584663 | Missotten et al. | Sep 2009 | B2 |
7670218 | Behnke et al. | Mar 2010 | B2 |
8196380 | Carboni | Jun 2012 | B2 |
20040186597 | Wippersteg et al. | Sep 2004 | A1 |
20090036184 | Craessaerts et al. | Feb 2009 | A1 |
20110146218 | Carboni | Jun 2011 | A1 |
20110173942 | Kowalchuk | Jul 2011 | A1 |
20120029757 | Kowalchuk | Feb 2012 | A1 |
Number | Date | Country | |
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20140053524 A1 | Feb 2014 | US |