USRE45091E1 - Row-clearing unit for agricultural implement - Google Patents
Row-clearing unit for agricultural implement Download PDFInfo
- Publication number
- USRE45091E1 USRE45091E1 US14/075,270 US201314075270A USRE45091E US RE45091 E1 USRE45091 E1 US RE45091E1 US 201314075270 A US201314075270 A US 201314075270A US RE45091 E USRE45091 E US RE45091E
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- US
- United States
- Prior art keywords
- agricultural implement
- row
- support element
- agricultural
- rod
- 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.)
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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
- A01B61/00—Devices for, or parts of, agricultural machines or implements for preventing overstrain
- A01B61/04—Devices for, or parts of, agricultural machines or implements for preventing overstrain of the connection between tools and carrier beam or frame
- A01B61/044—Devices for, or parts of, agricultural machines or implements for preventing overstrain of the connection between tools and carrier beam or frame the connection enabling a yielding pivoting movement around a substantially horizontal and transverse axis
- A01B61/046—Devices for, or parts of, agricultural machines or implements for preventing overstrain of the connection between tools and carrier beam or frame the connection enabling a yielding pivoting movement around a substantially horizontal and transverse axis the device including an energy accumulator for restoring the tool to its working position
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C7/00—Sowing
- A01C7/006—Minimum till seeding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
Definitions
- the present invention relates to agricultural implements and, more particularly, to an agricultural row-clearing unit for use with agricultural implements such as planting row units.
- the hydraulic cylinder includes a movable rod coupling the cylinder to the support element, a cavity within the cylinder for receiving pressurized hydraulic fluid for advancing the rod in a direction that pivots the support element downwardly, and an energy storage device coupled to the rod and the cylinder to apply a retracting force to the rod to bias the support element in a direction that urges the agricultural tool(s) upwardly away from the soil.
- One implementation also includes an accumulator having a fluid chamber containing a diaphragm.
- the portion of the chamber on one side of the diaphragm is connected to the hydraulic-fluid cavity in said hydraulic cylinder, and the portion of the chamber on the other side of the diaphragm contains a pressurized gas.
- the energy storage device is a compressed coil spring disposed around a portion of the movable rod with one end of the spring coupled to said rod and the other end of the spring coupled to the cylinder so that the spring continuously biases the movable rod in a retracting direction relative to the cylinder.
- the row-clearing wheels may be replaced with other agricultural tools, such as fertilizer openers or rollers to firm loose soil.
- the unit may be used without a planting row unit, or any other row unit, and the frame element may be connected directly to the towing frame.
- FIG. 1 is a side elevation of a planting row unit and a row-clearing unit, both attached to a towing frame, with the row-clearing unit in a lowered position.
- FIG. 2 is the same side elevation shown in FIG. 1 with the row-clearing unit in a raised position.
- FIG. 3 is an enlarged perspective of the row-clearing unit shown in FIGS. 1 and 2 .
- FIGS. 4 , 5 and 6 are side elevations of the main components of the row-clearing unit shown in FIGS. 1-3 in three different vertical positions.
- FIGS. 7 , 8 and 9 are side elevations of the hydraulic cylinder of the row-clearing unit shown in FIGS. 1-6 with the cylinder rod in three different positions corresponding to the positions shown in FIGS. 5 , 6 and 4 , respectively.
- FIG. 10 is a schematic diagram of a first hydraulic control system for use in the row-clearing unit shown in FIGS. 1-6 .
- FIG. 11 is a schematic diagram of a second hydraulic control system for use in the row-clearing unit shown in FIGS. 1-6 .
- FIG. 12 is a diagram illustrating one application of the hydraulic control system of FIG. 11 .
- the illustrative implement includes a row-clearing unit 10 mounted in front of a planting row unit 11 .
- a common elongated hollow towing frame 12 (typically hitched to a tractor by a draw bar) is rigidly attached to the front frame 13 of a four-bar linkage assembly 14 that is part of the row unit 11 .
- the four-bar (sometimes referred to as “parallel-bar”) linkage assembly 14 is a conventional and well known linkage used in agricultural implements to permit the raising and lowering of tools attached thereto.
- a coulter wheel 15 works the soil and then other portions of the row unit part the cleared soil to form a seed slot, deposit seed in the seed slot and fertilizer adjacent to the seed slot, and close the seed slot by distributing loosened soil into the seed slot with a closing wheel 18 .
- a gauge wheel 19 determines the planting depth for the seed and the height of introduction of fertilizer, etc.
- Bins 16 and 17 on the row unit carry the chemicals and seed which are directed into the soil. The planting row unit 11 is urged downwardly against the soil by its own weight.
- a hydraulic or pneumatic cylinder and/or one or more springs may be added between the front frame 13 and the linkage 14 to urge the row unit downwardly with a controllable force.
- a hydraulic cylinder may also be used to lift the row unit off the ground for transport by a heavier, stronger, fixed-height frame that is also used to transport large quantities of fertilizer for application via multiple residue-clearing and tillage row units.
- This hydraulic or pneumatic cylinder may be controlled to adjust the downward force for different soil conditions such as is described in U.S. Pat. Nos. 5,709,271, 5,685,245 and 5,479,992.
- the row-clearing unit 10 includes an attachment frame that includes a pair of rigid arms 20 and 21 adapted to be rigidly connected to the towing frame 12 .
- the arms 20 and 21 are bolted to opposite sides of the front frame 13 of the row unit 11 , which in turn is rigidly attached to the towing frame 12 .
- An alternative is to attach the row-clearing unit 10 directly to the towing frame 12 .
- a pair of cooperating toothed clearing wheels 22 and 23 are positioned upstream of the coulter wheel 15 of the planting row unit 11 .
- the clearing wheels 22 , 23 are arranged for rotation about transverse axes and are driven by the underlying soil as the wheels are advanced over the soil.
- the illustrative wheels 22 , 23 are a type currently sold by the assignee of the present invention under the trademark TRASHWHEEL.
- TRASHWHEEL The toothed wheels 22 , 23 cooperate to produce a scissors action that breaks up compacted soil and simultaneously clears residue out of the path of planting.
- the wheels 21 and 22 kick residue off to opposite sides, thus clearing a row for planting. To this end, the lower edges are tilted outwardly to assist in clearing the row to be planted. This arrangement is particularly well suited for strip tilling, where the strip cleared for planting is typically only about 10 inches of the 30-inch center-to-center spacing between planting rows.
- FIGS. 1 and 2 the clearing wheels 22 and 23 are shown in two different vertical positions. Specifically, the wheels 22 , 23 are in a lower position in FIG. 1 , where the elevation of the soil is decreasing, than in FIG. 2 , where the soil elevation is increasing.
- the row-clearing unit 10 is shown in more detail in FIGS. 3-9 .
- the two frame arms 20 , 21 are interconnected by an arched crossbar 24 that includes a pair of journals 25 and 26 for receiving the leading ends of a pair of laterally spaced support arms 30 and 31 .
- the support arms 30 , 31 are thus pivotally suspended from the crossbar 24 of the attachment frame, so that the trailing ends of the support arms 30 , 31 can be pivoted in an arc around a horizontal axis 32 extending through the two journals 25 , 26 .
- the row-clearing wheels 22 and 23 are mounted on the trailing ends of the support arms 30 and 31 , which are bolted or welded together. As can be seen in FIGS. 4-6 , the wheels 22 , 23 can be raised and lowered by pivoting the support arms 30 , 31 around the horizontal axis 32 . The pivoting movement of the support arms 30 , 31 is controlled by a hydraulic cylinder 70 connected between the fixed crossbar 24 and the trailing ends of the support arms 30 , 31 .
- FIGS. 4-6 show the support arms 30 , 31 , and thus the clearing wheels 22 , 23 , in progressively lower positions. The downward pressure applied to the support arms 30 , 31 to urge the clearing wheels 22 , 23 against the soil is also controlled by the hydraulic cylinder 70 .
- the hydraulic cylinder 70 is shown in more detail in FIGS. 7-9 .
- Pressurized hydraulic fluid from the tractor is supplied by a hose (not shown) to a port 71 that leads into an annular cavity 72 surrounding a rod 73 , and then on into an accumulator 79 .
- the port is closed by a valve, as will be described in more detail below.
- the lower end of the annular cavity 72 is formed by a shoulder 74 on the rod 73 , so that the hydraulic pressure exerted by the hydraulic fluid on the surface of the shoulder 74 urges the rod 73 downwardly (as viewed in FIGS. 7-9 ), with a force determined by the pressure of the hydraulic fluid and the area of the exposed surface of the shoulder 74 .
- the hydraulic fluid thus urges the rod 73 in an advancing direction (see FIG. 8 ).
- the accumulator 79 includes a diaphragm that divides the interior of the accumulator into a hydraulic-fluid chamber 79 a and a gas-filled chamber 79 b, e.g., filled with pressurized nitrogen.
- FIG. 7 shows the rod 73 in a position where the diaphragm is not deflected in either direction, indicating that the pressures exerted on opposite sides of the diaphragm are substantially equal.
- the hydraulic force has advanced the rod 73 to its most advanced position, which occurs when the resistance offered by the soil to downward movement of the clearing wheels 22 , 23 is reduced (e.g., by softer soil or a depression in the soil).
- advancing movement of the rod 73 is limited by the “bottoming out” of a coil spring 75 located between a flange 76 attached to the inner end of the rod 73 and a flange 77 attached to the interior of the cylinder 70 .
- the coil spring 75 is progressively compressed until it reaches its fully compressed condition illustrated in FIG. 8 , which prevents any further advancement of the rod 73 .
- Advancing movement of the rod 73 also expands the size of the annular cavity 72 (see FIG. 8 ), which causes the diaphragm 78 in the accumulator 79 to deflect to the position illustrated in FIG. 8 and reduce the amount of hydraulic fluid in the accumulator 80 .
- the support arms 30 , 31 and the clearing wheels 22 , 23 are pivoted to their lowermost positions relative to the row unit 11 .
- the rod 73 has been withdrawn to its most retracted position, which can occur when the clearing wheels 22 , 23 encounter a rock or other obstruction, for example.
- the support arms 30 , 31 and the clearing wheels 22 , 23 are pivoted to their uppermost positions relative to the row unit.
- retracting movement of the rod 73 is limited by engagement of a shoulder 80 on the rod 73 with a ring 81 on the trailing end of the cylinder 70 .
- the coil spring 75 is progressively expanded, as illustrated in FIG. 9 , but still applies a retracting bias to the rod 73 .
- FIG. 10 is a schematic of a hydraulic control system for supplying pressurized hydraulic fluid to the cylinders 70 of multiple row-clearing units.
- a source 100 of pressurized hydraulic fluid typically located on a tractor, supplies hydraulic fluid under pressure to a valve 101 via supply line 102 and receives returned fluid through a return line 103 .
- the valve 101 can be set by an electrical control signal S 1 on line 104 to deliver hydraulic fluid to an output line 105 at a desired constant pressure.
- the output line is connected to a manifold 106 that in turn delivers the pressurized hydraulic fluid to individual feed lines 107 connected to the ports 71 of the respective hydraulic cylinders 70 of the individual row-clearing units.
- the valve 101 is turned off, preferably by a manually controlled on/off valve V, after all the cylinders 70 have been filled with pressurized hydraulic fluid, to maintain a fixed volume of fluid in each cylinder.
- FIG. 11 is a schematic of a modified hydraulic control system that permits individual control of the supply of hydraulic fluid to the cylinder 70 each separate row-clearing unit via feed lines 107 connected to the ports 71 of the respective cylinders 70 . Portions of this system that are common to those of the system of FIG. 10 are identified by the same reference numbers. The difference in this system is that each separate feed line 107 leading to one of the row-clearing units is provided with a separate control valve 110 that receives its own separate control signal on a line 111 from a controller 112 .
- This arrangement permits the supply of pressurized hydraulic fluid to each row-clearing unit to be turned off and on at different times by the separate valve 110 for each unit, with the times being controlled by the separate control signals supplied to the valves 110 by the controller 112 .
- the individual valves 110 receive pressurized hydraulic fluid via the manifold 106 , and return hydraulic fluid to a sump on the tractor via separate return line 113 connected to a return manifold 114 connected back to the hydraulic system 100 of the tractor.
- FIG. 12 illustrates on application for the controllable hydraulic control system of FIG. 11 .
- Modern agricultural equipment often includes GPS systems that enable the user to know precisely where a tractor is located in real time.
- GPS systems that enable the user to know precisely where a tractor is located in real time.
- each planting row unit 120 can be turned off just as it enters the headland 122 , to avoid double-planting while the tractor 121 makes a turn through the headland.
- the hydraulic cylinder 70 of each row unit can also be separately controlled to turn off the supply of pressurized hydraulic fluid at a different time for each row-clearing unit, so that each row-clearing unit is raised just as it enters the headland, to avoid disrupting the rows already planted in the headland.
- each row-clearing unit can float vertically independently of every other row-clearing unit. Yet the following row units still have the down force remotely adjustable from the cab of the tractor or other selected location. This permits very efficient operation of a wide planter or other agricultural machine in varying terrain without having to stop to make manual adjustment to a large number of row-clearing units, resulting in a reduction in the number of acres planted in a given time period. One of the most important factors in obtaining a maximum crop yield is timely planting.
- each row-clearing unit or group of units
- the ability to quickly release all down force and let the row cleaner quickly rise e.g., when approaching a wet spot in the field
- one row-clearing unit On wide planters or other equipment, at times 90 feet wide or more and planting at 6 mph or more forward speed, one row-clearing unit must often rise or fall quickly to clear a rock or plant into an abrupt soil depression. Any resistance to quick movement results in either gouging of the soil or an uncleared portion of the field and reduced yield.
- the row-clearing unit having its own hydraulic accumulator, the clearing wheels and the rod of the hydraulic cylinder can move quickly and with a nearly constant down force. Oil displaced by or required by quick movement of the rod and clearing wheels (or other agricultural tool) is quickly moved into or out of the closely mounted accumulator which is an integral part of each row-clearing unit.
- the accumulator diaphragm or piston supplies or accepts fluid as required at a relatively constant pressure and down force as selected manually or automatically by the hydraulic control system.
- the toolbar-frame-mounted row-clearing unit permits the planter row unit following independently behind to use less down force for its function, resulting in more uniform seed depth control and more uniform seedling emergence. More uniform seedling stands usually result in higher yields than less uniform seedling stands produced by planters with less accurate row cleaner ground following.
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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lifting Devices For Agricultural Implements (AREA)
- Soil Working Implements (AREA)
Abstract
Description
Claims (46)
Priority Applications (1)
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US14/075,270 USRE45091E1 (en) | 2008-12-01 | 2013-11-08 | Row-clearing unit for agricultural implement |
Applications Claiming Priority (2)
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US12/325,723 US7673570B1 (en) | 2008-12-01 | 2008-12-01 | Row-clearing unit for agricultural implement |
US14/075,270 USRE45091E1 (en) | 2008-12-01 | 2013-11-08 | Row-clearing unit for agricultural implement |
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US12/325,723 Reissue US7673570B1 (en) | 2008-12-01 | 2008-12-01 | Row-clearing unit for agricultural implement |
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US12/325,723 Ceased US7673570B1 (en) | 2008-12-01 | 2008-12-01 | Row-clearing unit for agricultural implement |
US14/075,270 Active USRE45091E1 (en) | 2008-12-01 | 2013-11-08 | Row-clearing unit for agricultural implement |
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US12/325,723 Ceased US7673570B1 (en) | 2008-12-01 | 2008-12-01 | Row-clearing unit for agricultural implement |
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