A harvesting system for an agricultural harvester based on a header and a header for an agricultural harvester

Abstract

One aspect of the present subject matter relates to a header-based harvesting system for an agricultural harvester, the harvesting system including a header configured to be removably coupled to a front end of the harvester. The header includes a header frame and a bottom cutter assembly coupled to the header frame in a floating arrangement. Additionally, the system includes an actuator coupled between the header frame and the bottom cutter assembly, and a hydraulic circuit in fluid communication with the actuator. The hydraulic circuit is configured to permit the supply of pressurized hydraulic fluid to the actuator for controlling the floating movement of the bottom cutter assembly relative to the header frame.

Description

Technical Field

[0001] This topic generally relates to harvesting platforms for agricultural harvesters (such as sugarcane harvesters), and more specifically, to floating bottom cutter assemblies for harvesting platforms of agricultural harvesters and related systems and hydraulic circuits for adjusting said floating bottom cutter assembly. Background Technology

[0002] In the ever-changing agricultural landscape, adaptability is crucial for enabling manufacturers of agricultural harvesters and end-users of such harvesters to adapt to changing market demands and planting arrangements and / or similar trends. This need for adaptability is particularly relevant to the cultivation and harvesting of sugarcane and other tall crops, where the industry is rapidly evolving with the development of new plant species and the use of changing planting structures, all aimed at increasing productivity. In this regard, sugarcane harvester manufacturers have devoted considerable effort to providing machines that adapt to changing market demands, such as by designing harvesters capable of harvesting two or more crop rows instead of a single row (i.e., multi-row harvesting). However, to date, conventional harvesters have been particularly well-suited to the specific types of harvesting operations being performed, for example, by having a specific frame or chassis configuration for single-row harvesting, a different frame or chassis configuration for multi-row harvesting, and yet another frame or chassis configuration for harvesting based on a harvesting platform. Therefore, to provide a commercial version of each of these machines, current manufacturers need to invest significant time and resources in the development and deployment of such machine variants.

[0003] To address this problem, detachable harvesting platforms for sugarcane harvesters have recently been proposed, enabling a single machine to be adapted to provide multiple harvesting configurations. For example, U.S. Patent Publication No. 2017 / 0000026, filed June 30, 2016 and assigned to CNIndustrial America LLC, discloses a harvesting platform that can be used with a sugarcane harvester, the disclosure of which is incorporated herein by reference in its entirety for various purposes. Such removable or detachable harvesting platforms offer numerous advantages over existing known machines. However, further improvements and refinements to harvesting platforms configured for use with sugarcane harvesters remain desirable to adapt to evolving market demands. For instance, bottom cutter assemblies used in conventional non-harvesting platform-based harvesters are typically fixed to the main chassis or frame of the harvester, necessitating raising and lowering the entire machine to adjust the vertical positioning of the bottom cutter assembly according to varying ground topography or contours. However, the new cutter configuration is generally intended for use with harvester-based harvesters to allow for more efficient and effective adjustment of the position of the bottom cutter assembly.

[0004] Therefore, there is a need in the industry for a new bottom cutter assembly and related systems / components that can be used with a detachable harvester header, such as a header configured for use with a sugarcane harvester. Summary of the Invention

[0005] Aspects and advantages of the invention will be set forth in part in the description which follows, or may be apparent from the description, or may be learned by practicing the invention.

[0006] In one aspect, this subject matter relates to a harvesting system based on a harvesting platform for an agricultural harvester. The system includes a harvesting platform configured to be removably coupled to the front end of the harvester. The harvesting platform includes a harvesting platform frame and a bottom cutter assembly floatably coupled to the harvesting platform frame. Additionally, the system includes an actuator coupled between the harvesting platform frame and the bottom cutter assembly, and a hydraulic circuit in fluid communication with the actuator. The hydraulic circuit is configured to allow pressurized hydraulic fluid to be supplied to the actuator to adjust the floating movement of the bottom cutter assembly relative to the harvesting platform frame.

[0007] In another aspect, this subject matter relates to a harvesting platform for an agricultural harvester. The harvesting platform includes a harvesting platform frame configured to be removably coupled to the front end of the agricultural harvester, and a bottom cutter assembly coupled to the harvesting platform frame. The bottom cutter assembly includes at least one cutting blade and a drive assembly configured to rotatably drive the at least one cutting blade. The harvesting platform further includes a linkage assembly that couples the bottom cutter assembly to the harvesting platform frame such that the bottom cutter assembly is movable relative to the harvesting platform frame in both a first direction and a second direction opposite to the first direction. Additionally, the harvesting platform includes an actuator coupled between the harvesting platform frame and the bottom cutter assembly, wherein the actuator is configured to allow the bottom cutter assembly to float relative to the harvesting platform frame in both the first and second directions.

[0008] These and other features, aspects, and advantages of the invention will be better understood by referring to the following description and the appended claims. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. Attached Figure Description

[0009] The specification with reference to the accompanying drawings sets forth a complete and feasible disclosure of the invention to those skilled in the art, including the preferred mode thereof, wherein:

[0010] Figure 1 shows a simplified side view of an embodiment of an agricultural harvester according to an aspect of the present subject matter;

[0011] Figure 2 A simplified side view is shown of one embodiment of an agricultural harvester including a detachable harvesting head, according to aspects of this subject matter.

[0012] Figure 3 A simplified front view is shown of an embodiment of a harvesting table configured for use with an agricultural harvester according to aspects of this subject matter, wherein in particular an embodiment of the harvesting table includes a floating bottom cutter assembly according to aspects of this subject matter is shown.

[0013] Figure 4 Show Figure 3 A simplified side view of the harvester platform shown, particularly illustrating the bottom cutter assembly connected to the frame of the harvester platform via a telescopic arrangement; and

[0014] Figure 5 A schematic diagram of one embodiment of a hydraulic circuit for adjusting the movement of a floating bottom cutter assembly, according to aspects of this subject matter, is shown. Detailed Implementation

[0015] Reference will now be made in detail to embodiments of the invention, one or more examples of which are illustrated in the accompanying drawings. Each example is provided by way of explanation and illustration of the invention, and not as a limitation thereof. Indeed, it will be apparent to those skilled in the art that various modifications and variations can be made to the invention without departing from the scope or spirit thereof. For example, a feature shown or described as part of an embodiment may be used with another embodiment to produce yet another embodiment. Therefore, the invention is intended to cover such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0016] Generally, this subject matter relates to a floating bottom cutter assembly for a harvesting platform configured for use with an agricultural harvester (such as a sugarcane harvester). Additionally, in several embodiments, this subject matter relates to a harvesting platform-based harvesting system for an agricultural harvester, the harvesting system comprising, for example, a harvesting platform and a bottom cutter assembly configured to float relative to the frame of the harvesting platform.

[0017] In several embodiments, the bottom cutter assembly may be configured to be coupled to the harvester frame using a telescopic arrangement that allows the bottom cutter assembly to float or move relative to the harvester frame in generally opposite directions (e.g., generally upward and generally downward). For example, in one embodiment, the bottom cutter assembly may be coupled to the harvester frame via a linkage assembly comprising a first and second link or pivot arm forming a four-bar linkage between the bottom cutter assembly and the harvester frame. Such bidirectional movement of the bottom cutter assembly relative to the harvester frame typically allows the bottom cutter assembly to follow changes in ground topography during harvesting operations, for example, by allowing the bottom cutter assembly to move upward relative to the frame when it encounters a raised surface profile and downward relative to the frame when it encounters a recessed surface profile.

[0018] Additionally, to regulate the floating motion of the bottom cutter assembly relative to the harvester frame, a hydraulic actuator can be coupled between the bottom cutter assembly and the harvester frame, the hydraulic actuator being in fluid communication with a hydraulic circuit. In several embodiments, the hydraulic circuit can typically be configured to supply pressurized hydraulic fluid to the actuator, allowing the actuator to apply a substantially constant load to the associated bottom cutter assembly, thereby allowing the bottom cutter assembly to remain in contact with the ground at a desired downforce or pressure. For example, in one embodiment, the hydraulic circuit can be configured to utilize the concept of a regenerative cylinder to maintain a constant load applied to the bottom cutter assembly relative to the harvester frame in both directions of movement (e.g., both upward and downward), for example by including an accumulator within the hydraulic circuit, the accumulator being configured to prevent or minimize temporary pressure fluctuations within the circuit.

[0019] Referring now to the accompanying drawings, FIG1 shows a side view of one embodiment of a typical sugarcane harvester 10 known in the art. As shown in FIG1, the harvester 10 includes a frame 12, a pair of front wheels 14, a pair of rear wheels 16, and an operator's cab 18. The harvester 10 also includes a power source (e.g., an engine mounted on the frame 12) that powers one or both pairs of wheels 14, 16 via a transmission (not shown). Alternatively, the harvester 10 may be a tracked harvester, and therefore, in contrast to the wheels 14, 16 shown, may include engine-driven tracks. The engine may also drive a hydraulic fluid pump (not shown) configured to generate pressurized hydraulic fluid to power the various hydraulic components of the harvester 10.

[0020] Additionally, the harvester 10 includes various components for cutting / harvesting, processing, cleaning, and discharging sugarcane during harvesting from the field 20. For example, the harvester 10 includes a top cutter assembly 22 located at its front end to cut the sugarcane as the harvester 10 moves in a forward direction. As shown, the top cutter assembly 22 includes a collection disc 24 and a cutting disc 26. The collection disc 24 can be configured to collect sugarcane stalks so that the cutting disc 26 can be used to cut off the top of each stalk. As generally understood, the height of the top cutter assembly 22 can be adjusted by the operator as needed via a pair of hydraulically raised and lowered arms 28.

[0021] Additionally, the harvester 10 includes a divider 30 extending upwards and backwards from the field 20. Typically, the divider 30 may include two helical feed rollers 32. Each feed roller 32 includes a ground shoe 34 at its bottom end to help the divider 30 collect sugarcane stalks for harvesting. Moreover, as shown in FIG1, the harvester 10 includes a pressing roller 36 positioned near the front wheel 14 and a finned roller 38 positioned behind the pressing roller 36. As the pressing roller 36 rotates, the sugarcane stalks being harvested are knocked down, while the divider 30 collects the stalks from the field 20. Further, as shown in FIG1, the finned roller 38 includes a plurality of spaced-apart fins 40 that help to push the sugarcane stalks downwards. As the finned roller 38 rotates during harvesting, the sugarcane stalks already pressed down by the pressing roller 36 are separated and further pressed down by the finned roller 38 as the harvester 10 continues to move forward relative to the field 20.

[0022] Referring again to Figure 1, the harvester 10 also includes a bottom cutter assembly 42 mounted on the frame 12 behind the finned roller 38. As generally understood, the bottom cutter assembly 42 includes blades (not shown) for cutting sugarcane stalks during harvesting. The blades, located on the periphery of the assembly 42, can be rotated by a hydraulic motor (not shown) powered by the vehicle's hydraulic system. As mentioned above, the bottom cutter assembly 42 is generally positioned in a fixed relationship with the frame 12, thus requiring the entire machine to be raised and lowered to adjust the vertical positioning of the assembly 42 in response to changes in ground topography.

[0023] Furthermore, the harvester 10 includes a feed roller assembly 44 located downstream of the bottom cutter assembly 42 for moving the cut sugarcane stalks along a processing path from the bottom cutter assembly 42. As shown in FIG1, the feed roller assembly 44 includes a plurality of bottom rollers 46 and a plurality of opposing top clamping rollers 48. The respective bottom and top rollers 46, 48 are typically used to clamp the harvested sugarcane during conveying. As the sugarcane is conveyed through the feed roller assembly 44, debris (e.g., stones, dust, and / or the like) is also allowed to fall onto the field 20 via the bottom rollers 46.

[0024] Additionally, the harvester 10 includes a shredder assembly 50 located downstream of the feed roller assembly 44 (e.g., adjacent to the final bottom and top feed rollers 46, 48). Typically, the shredder assembly 50 is used to cut or shred the chopped sugarcane stalks into pieces or “segments” 51, which may be, for example, six (6) inches long. The segments 51 can then be pushed toward the elevator assembly 52 of the harvester 10 to be delivered to an external receiver or storage device (not shown).

[0025] As commonly understood, debris 53 (e.g., dust, dirt, leaves, etc.) separated from sugarcane segments 51 is discharged from the harvester 10 via a main extractor 54, which is immediately following the shredder assembly 50 and oriented to guide the debris 53 outward from the harvester 10. The main extractor 54 may include, for example, an extractor shroud 55 and an extractor fan 56 mounted within the shroud 55, the fan 56 being used to generate a suction force or vacuum sufficient to pick up the debris 53 and force it through the shroud 55. The separated or cleaned segments 51, heavier than the debris 53 discharged through the extractor 54, can then fall downward to the elevator assembly 52.

[0026] As shown in Figure 1, the elevator assembly 52 typically includes an elevator housing 58 and an elevator 60 extending within the elevator housing 58 between a lower proximal end 62 and an upper distal end 64. Typically, the elevator 60 includes an annular chain 66 and a plurality of blades or plates 68 attached to and evenly spaced along the chain 66. The blades 68 are configured to hold the sugarcane blank segment 51 on the elevator 60 as it lifts the blank segment along a top span 70 defined between its proximal end 62 and distal end 64. Additionally, the elevator 60 includes a lower sprocket 72 and an upper sprocket 74 respectively positioned at its proximal end 62 and distal end 64. As shown in Figure 1, the elevator motor 76 is connected to one of the sprockets (e.g., upper sprocket 74) to drive the chain 66, thereby allowing the chain 66 and the blades 68 to travel in an annular loop between the proximal end 62 and the distal end 64 of the elevator 60.

[0027] Furthermore, in some embodiments, debris portions 53 (e.g., dust, dirt, leaves, etc.) separated from the transported sugarcane segments 51 can be discharged from the harvester 10 via a secondary extractor 78 connected to the rear end of the elevator housing 58. For example, the debris 53 discharged by the secondary extractor 78 can be debris remaining after the segments 51 have been cleaned and debris 53 has been discharged by the main extractor 54. As shown in FIG1, the secondary extractor 78 is located near the distal end 64 of the elevator 60 and can be oriented to guide the debris 53 outward from the harvester 10. Additionally, an extractor fan 80 is mounted at the bottom of the secondary extractor 78 to generate a suction force or vacuum sufficient to pick up the debris 53 and force it through the secondary extractor 78. Separated, cleaned segments 51 heavier than the debris 53 discharged by the extractor 78 can then fall from the distal end 64 of the elevator 60. Typically, the billet segment 51 can be dropped downwards through the elevator discharge opening 82 of the elevator assembly 52 into an external storage device (not shown), such as a sugarcane billet trolley.

[0028] During operation, the harvester 10 travels through the field 20 to harvest sugarcane. After adjusting the height of the top trimmer assembly 22 via the arm 28, the collecting disc 24 on the top trimmer assembly 22 is used to collect sugarcane stalks as the harvester 10 advances through the field 20, while the cutter disc 26 cuts off the top of the multi-leaved sugarcane stalks for disposal along both sides of the harvester 10. As the stalks enter the divider 30, the ground shoe 34 sets the operating width to determine the amount of sugarcane entering the throat of the harvester 10. The auger feed roller 32 then gathers the stalks into the throat to allow the action of the pressing roller 36 in conjunction with the finned roller 38 to bend the stalks downwards. Once the stalks are angled downwards as shown in FIG. 1, the bottom cutter assembly 42 cuts off the bottom of the stalks from the field 20. The cut stalks are then guided to the feed roller assembly 44 by the movement of the harvester 10.

[0029] The cut sugarcane stalks are conveyed rearward by bottom and top feed rollers 46, 48, which compress the stalks to make them more uniform and vibrate the loose debris to pass through the bottom roller 46 to the field 20. At the downstream end of the feed roller assembly 44, the shredder assembly 50 cuts or shreds the compressed sugarcane stalks into pieces or segments 51 (e.g., 6-inch sugarcane segments). The treated crop material discharged from the shredder assembly 50 is then directed as a stream of segments 51 and debris 53 into the main extractor 54. The suction force generated by the extractor fan 56 then uses the main extractor 54 to remove the airborne debris 53 (e.g., dust, dirt, leaves, etc.) separated from the sugarcane segments. The separated / cleaned billet segment 51 then falls downward through the elevator hopper 86 into the elevator assembly 52, and travels upward via the elevator 60 from its proximal end 62 to its distal end 64. During normal operation, once the billet segment 51 reaches the distal end 64 of the elevator 60, it falls through the elevator discharge opening 82 into an external storage device. If provided, a secondary extractor 78 (by means of an extractor fan 80) similar to the main extractor 54 blows out the garbage / debris 53 from the harvester 10.

[0030] Now for reference Figure 2 This image shows a side view of one embodiment of a sugarcane harvester 100 including a detachable or removable harvesting table 200, according to aspects of this subject matter. Figure 2 The operation of the harvester 100 shown is the same as or similar to that of the harvester 10 described above with reference to FIG1, and therefore, it is not necessary to describe the specific details of the operation of such a harvester below. For example, the harvester 100 may generally include the same or similar components as the harvester 10 described above for cutting / harvesting, processing, cleaning, and discharging sugarcane.

[0031] like Figure 2 As shown, the harvester 100 includes a frame 102 mounted on ground-engaging tracks 104 and an operator's cab 106 supported on the frame 102. In other embodiments, instead of track drive, the harvester 100 may alternatively include a pair of front and rear wheels (e.g., similar to those described above with reference to FIG. 1). The harvester 100 also includes a power source (e.g., an engine 108 mounted on the frame 102) that powers the tracks 104 via a transmission (not shown). The engine 108 may also drive a hydraulic fluid pump (not shown) configured to generate pressurized hydraulic fluid in a main hydraulic circuit to power various hydraulic components of the harvester 100.

[0032] Additionally, the harvester 100 includes various components for cutting / harvesting, processing, cleaning, and discharging sugarcane during harvesting from farmland. However, unlike the embodiments of the harvester 10 described above, a portion of such components is mounted on / inside a detachable harvesting platform 200 and / or otherwise configured to be operatively associated with the detachable harvesting platform 200, which is configured to be removably coupled to the front end of the chassis or frame 102 of the harvester 100. For example, reference will be made below. Figure 3 and Figure 4 As described, various upstream components associated with the harvesting process (e.g., top trimmer assemblies, dividers, tillers, finned rollers, bottom cutter assemblies, and / or similar components) may be supported on the harvester 200 or otherwise configured to be operatively associated with the harvester 200. In such embodiments, the remaining portions of the harvesting-related components located downstream of the harvester 200 may be mounted on the main frame 102 of the harvester 100, such as feed roller assemblies, shredder assemblies, main extractors, elevator assemblies, secondary extractors, and / or similar components. For example, in Figure 2 In the illustrated embodiment, the cut sugarcane stalks provided via a harvesting member supported on the harvesting table 200 can be conveyed via a feed roller assembly (not shown) supported on the harvester frame 102 to an associated shredder assembly 110, which cuts the stalks into fragments or segments and guides the segments (and corresponding debris) toward the main extractor 112 for cleaning. The cleaned segments are then conveyed upwards via an elevator assembly 114 to an external storage device, wherein an optional secondary extractor 116 is disposed at the distal end of the elevator assembly 114 to provide additional means for removing debris / chips from the segment stream discharged from the harvester 100.

[0033] It should be understood that the harvester 200 can generally be configured to be attached to the frame 102 of the harvester 100 using any suitable attachment or connection means, including any fastening means typically used to attach harvester attachments to the harvester. For example, in one embodiment, suitable hooks, locks, flanges, bolts, and / or similar means can be used to attach the harvester 200 to the front end of the harvester 100.

[0034] Now for reference Figure 3 and Figure 4 This illustrates aspects of the subject matter suitable for use with agricultural harvesters (e.g., references above). Figure 2 A different schematic diagram of one embodiment of a detachable or removable harvesting head 200 used with a harvester 100 described herein. Specifically, Figure 3 A simplified front view of the harvester 200 is shown, and Figure 4A simplified side view of the harvester 200 is shown, in which various frame or structural members are removed from the harvester 200 in the front and side views to simplify the drawings and allow certain harvester components to be clearly shown therein.

[0035] As shown in the illustrated embodiment, the harvester 200 includes a main chassis or frame 202. Typically, the frame 202 may form the support structure of the harvester 200 and therefore may include a plurality of structural elements and / or frame members 204 (many of which are not shown for illustrative purposes), said plurality of structural elements and / or frame members 204 being configured to be coupled together in a manner that allows the frame 202 to support the various harvester-related components described herein. Additionally, the frame 202 is configured to be removably or detachably coupled to the front end of the harvester. For example, as described above, the harvester frame 202 may be configured to be coupled to the frame of the associated harvester using any suitable attachment or connection means (such as hooks, locks, flanges, bolts, and / or the like).

[0036] It should be understood that, depending on the desired harvesting configuration of the harvesting platform 200, the frame 202 can typically have any suitable configuration, including being configured to support any number of associated harvesting members. For example, in the illustrated embodiment, the frame 202 is typically configured to provide a multi-row harvesting configuration for simultaneously harvesting two or more rows of sugarcane. However, in other embodiments, the frame 202 can be configured so that the harvesting platform 200 provides any other suitable harvesting configuration, such as a single-row harvesting configuration and / or similar.

[0037] As shown in the illustrated embodiment, the harvester 200 includes three laterally spaced dividers 206 spanning the width of the frame 202. Typically, each divider 206 may include one or more helical feed rollers 208 (e.g., a pair of helical feed rollers 208) configured to separate the crop(s) to be harvested from adjacent rows and collect such crop(s) for subsequent processing. In this regard, the lateral spacing 210 between adjacent dividers 206 can typically be selected based on the desired number of rows of crop to be harvested. For example, in one embodiment, the lateral spacing 210 may be selected such that a single crop row is fed between adjacent dividers 206 for harvesting, thereby allowing the harvester 200 to harvest two crop rows simultaneously. In another embodiment, the lateral spacing 210 can be increased to allow two or more crop rows to be fed between adjacent dividers 206 for harvesting, thereby allowing the harvester 200 to harvest four or more crop rows simultaneously. It should also be understood that, in alternative embodiments, the harvester 200 may simply comprise two dividers 206 spaced apart across the width of the frame 202, wherein the lateral spacing 210 between such dividers 206 is selected to provide, for example, a single-row harvesting configuration or a multi-row harvesting configuration for the harvester 200. In yet another embodiment, the harvester 200 may comprise four or more dividers 206 laterally spaced across the width of the frame 202.

[0038] Additionally, as shown in the illustrated embodiment, the harvester 200 includes two bottom cutter assemblies 220 supported by a frame 202 at a location behind or at the rear of the divider 206. For example, as in Figure 3 As specifically shown, the first bottom cutter assembly 220A is generally aligned behind a pair of dividers 206 formed by the leftmost distributor 206 and the central distributor 206, to allow cutting of the stems of the crop collected between such distributors 206. Additionally, the second bottom cutter assembly 220B is generally aligned behind a pair of dividers 206 formed by the rightmost distributor 206 and the central distributor 206, to allow cutting of the stems of the crop collected between such distributors 206.

[0039] In several embodiments, each bottom cutter assembly 220 may include at least one rotatable cutting blade 222 (e.g., a pair of cutting blades 222) configured to cut the stems of crops fed between dividers 206 positioned in front of the bottom cutter assembly 220. Figure 4As specifically shown, the cutting blade 222 may be angled downwards, for example, to ensure that the bottom of the stem is cut as close to the ground as possible. Furthermore, each bottom cutter assembly 200 may include a drive assembly 224 for rotatably driving an associated pair of cutting discs 222. In one embodiment, each drive assembly 224 may include a single drive source for rotatably driving the cutting blade 222. For example, each drive assembly 224 may include a single drive motor 226 (e.g., a hydraulic motor) coupled to a corresponding drive shaft 228 via a corresponding gearbox 230, thereby allowing the drive motor 226 to rotatably drive both cutting blades 222. In an alternative embodiment, each cutting blade 222 may be configured to be rotatably driven by a separate drive source (e.g., a separate drive motor 226 for each respective cutting blade 222).

[0040] According to aspects of this subject matter, each bottom cutter assembly 220 can be configured to be connected to the harvester frame 202 in a floating arrangement, the floating arrangement allowing the bottom cutter assembly 220 to float or move relative to the frame 202. Specifically, in several embodiments, each bottom cutter assembly 220 can be configured to float such that the vertical positioning of the cutting blade 222 relative to the harvester frame 202 can vary or be adjusted to adapt to changing ground topography / profile. For example, a floating bottom cutter assembly 220 can allow the cutting blade 222 to generally follow the shape of the ground, such as by allowing each bottom cutter assembly 220 to move upward relative to the frame 202 to adapt to convexities or upward slopes in the ground profile, and by allowing each bottom cutter assembly 220 to move downward relative to the frame 202 to adapt to depressions or downward slopes in the ground profile. Thus, despite changes in ground topography, the cutting blade 220 can remain substantially in the desired position relative to the ground.

[0041] To facilitate the floating arrangement of the bottom cutter assemblies 220, each bottom cutter assembly 220 can typically be configured to be coupled to the harvester frame 202 in any suitable manner that allows relative movement between the bottom cutter assembly 220 and the frame 202. In several embodiments, each bottom cutter assembly 220 is coupled to the frame via a pantographic arrangement. For example, as... Figure 4As shown, each bottom cutter assembly 220 is connected to the frame via a linkage assembly forming a four-bar linkage. The linkage assembly may typically include a pair of links or pivot arms 240, 242 (e.g., upper / lower pivot arms or first / second pivot arms) connecting each bottom cutter assembly 220 to the frame 202. Specifically, each pivot arm 240, 242 extends longitudinally between a first end 244 (or frame end) and a second end 246 (or cutter end), wherein the first end 244 of each arm 240, 242 is pivotally connected at a first pivot point 248 to a portion of the frame (e.g., one of the frame members 204 of frame 202), and the second end 246 of each arm 240, 242 is pivotally connected at a second pivot point 250 to a portion of the associated bottom cutter assembly 220. Therefore, each bottom cutter assembly 220 can be configured to move or move upward (e.g., via links 240, 242 about a first pivot point 248 in a first pivot direction 252) and downward (e.g., via links 240, 242 about a second pivot point 250 in the opposite second pivot direction 254) relative to the harvester frame 202.

[0042] It should be understood that the relative positioning of the connection points between each pivot arm 240, 242 and the frame / assembly can typically be chosen to provide the desired movement of the bottom cutter assembly 220 relative to the frame when encountering changes in ground topography. For example, in one embodiment, the links or pivot arms 240, 242 may be suitably connected between the frame 202 and the associated bottom cutter assembly 220 to allow the bottom cutter assembly 220 to move upward relative to the frame 202 as it is pushed backward due to contact with the ground. In such an embodiment, once past a ridge or protrusion in the ground, the bottom cutter assembly 220 can move forward toward its original position as it moves downward relative to the frame 202.

[0043] Additionally, in several embodiments, an actuation mechanism or actuator may be provided operatively associated with each bottom cutter assembly 220 to control the movement of the bottom cutter assembly 220 relative to the frame 202. Specifically, as Figure 3 As shown, hydraulic actuators 260 are coupled between each bottom cutter assembly 220 and the frame 202. Each hydraulic actuator 260 can typically be configured to adjust the upward / downward floating movement of its corresponding bottom cutter assembly 220 to allow the cutting blade 222 to follow the contours of the ground. For example, see below for reference. Figure 5As described, the hydraulic actuator 260 may be included within (or fluidly coupled to) a suitable hydraulic circuit to allow the associated bottom cutter assembly 220 to float upward relative to the frame 202 upon encountering a ridge / bump or other protrusion in the ground, and downward relative to the frame 202 upon encountering a depression or other recess in the ground. In such an embodiment, the hydraulic actuator 260 may act as a passive device, for example, within a hydraulic circuit.

[0044] It should be understood that, in contrast to including a pair of bottom cutter assemblies 220, the harvester 200 may include any other suitable number of bottom cutter assemblies 220. For example, in an embodiment where the harvester 200 includes only a pair of dividers 206, a single bottom cutter assembly 220 may be mounted on the frame 202 at a position rear of such dividers 206. Similarly, in an embodiment where the harvester 200 includes four or more dividers 206, the harvester 200 may include three or more bottom cutter assemblies 220 positioned relative to adjacent pairs of dividers 206.

[0045] Furthermore, it should be understood that the harvesting platform 200 can typically incorporate or include any other suitable harvesting-related components. For example, such as... Figure 3 and 4 As shown, the harvester 220 may also include a compaction roller 232 positioned in front of each bottom cutter assembly 220 (and behind the divider 206). In such embodiments, the compaction roller 232 may be configured to compact the stalks collected by the divider 206 or otherwise bend the stalks collected by the divider 206 toward the ground. Furthermore, in addition to the compaction roller 232, the harvester 200 may also include or be coupled to one or more top trimmer assemblies, finned rollers, and / or similar components. For example, in one embodiment, the harvester 200 may include a harvesting configuration similar to the multi-row harvesting arrangement described, for example, in U.S. Patent No. 9,826,685, filed October 28, 2015, entitled “Vertical Roller Device to Aid in Feeding SugarCane Stalk to Harvester,” the disclosure of which is incorporated herein by reference in its entirety for various purposes. In such embodiments, for example, the harvester 200 may be configured to support vertical rollers (e.g., similar to those disclosed in the patent cited above) to help guide the sugarcane stalks toward the center of each bottom cutter assembly 220.

[0046] Now for reference Figure 5This diagram illustrates a schematic representation of an embodiment of a hydraulic circuit 300 according to aspects of this subject matter, the hydraulic circuit 300 being used to regulate the movement of a floating bottom cutter assembly configured for use with a detachable harvester table of an agricultural harvester. Typically, reference is made to the harvester table 200 and the above reference... Figure 3 and Figure 4 The hydraulic circuit 300 is described in one of the bottom cutter assemblies 220. However, generally, the hydraulic circuit 300 can be configured for use with a harvester having any other suitable harvester configuration and / or with a bottom cutter assembly having any other suitable cutter configuration.

[0047] In several embodiments, the hydraulic circuit 300 can typically be configured to allow a substantially constant pressure to be applied to the associated bottom cutter assembly 220, thereby allowing the bottom cutter assembly 220 to contact the ground with a constant downward pressure. For example, as described above, the hydraulic circuit 300 can be configured to utilize the concept of a regenerative cylinder to maintain a substantially constant load applied to the bottom cutter assembly 220 relative to the harvester frame in both directions of movement (e.g., both upward and downward).

[0048] like Figure 5 As shown, the hydraulic circuit 300 may include a hydraulic actuator 302 configured to be coupled to the floating bottom cutter assembly 220, the hydraulic actuator 302 possibly corresponding to, for example, the one referenced above. Figure 3 and Figure 4 One of the actuators 260 described. In several embodiments, the hydraulic actuator 302 may include a double-acting hydraulic cylinder configured to allow working fluid (e.g., hydraulic fluid) to be supplied to both sides of the cylinder for extension and retraction. For example, as Figure 5 As shown, actuator 302 includes a piston 304 housed within cylinder 306 and a rod 308 coupled to piston 304, the rod 308 extending outward from cylinder 306 to allow coupling of rod 308 to a portion of an associated bottom cutter assembly 220. Additionally, as... Figure 5 As shown, actuator 302 includes a first fluid port 310 and a second fluid port 312 to supply fluid along opposite sides of piston 304 to corresponding first fluid chamber 314 and second fluid chamber 316 defined within cylinder 306. Thus, actuator 302 can be configured to accommodate floating motion of the bottom cutter assembly 220 in both upward and downward directions of movement. For example, in the illustrated embodiment, to allow the bottom cutter assembly 220 to float upward relative to the frame (e.g., along...), Figure 5(As indicated by arrow 318 in the image), fluid can be supplied to the first chamber or the cover-side chamber 314 via the first fluid port 310, while fluid can be discharged or exited from the second chamber or the rod-side chamber 316 via the second fluid port 312. Similarly, to allow the bottom cutter assembly 220 to float downwards relative to the frame (e.g., along...), Figure 5 (In the direction indicated by arrow 320), fluid can be supplied to the second chamber or the rod-side chamber 316 via the second fluid port 312, while fluid is discharged or drained from the first chamber or the cover-side chamber 314 via the first fluid port 310.

[0049] Additionally, in several embodiments, the hydraulic circuit 300 may include a pressure regulating valve 322 (PRV) for regulating the pressure of the hydraulic fluid supplied from a suitable pressurized fluid source 324 to the actuator 302 (e.g., the cover-side chamber 314 of the actuator 302), thereby allowing the downforce or load applied to the bottom cutter assembly 220 to be set or adjusted as needed. Figure 5 As shown, PRV 322 can be fluidly connected to pressurized fluid source 324 via supply line 326 to allow pressurized hydraulic fluid to be supplied to pressurized fluid source 324. The fluid guided through PRV 322 can then be supplied to actuator 302 via main actuator line 328, which branches into first and second actuator lines 330 and 332 to allow fluid to flow to first and second fluid ports 310 and 312 of actuator 302, respectively. Additionally, as... Figure 5 As shown, the hydraulic circuit 300 also includes a return line 334 for returning fluid to a fluid source 336 of the circuit 300, such as the fluid tank of a harvester.

[0050] It should be understood that the pressurized fluid source 324, which supplies pressurized hydraulic fluid through circuit 300, can generally correspond to any suitable pressurized fluid source. For example, in one embodiment, a dedicated pump for supplying pressurized hydraulic fluid to circuit 300 can be provided. Alternatively, pressurized fluid source 324 can correspond to the harvester's main pressurized fluid source (e.g., the main pump that supplies fluid through the harvester's main hydraulic circuit). In such embodiments, as Figure 5 As shown, check valve 338 may be located downstream of the point in the main hydraulic circuit (e.g., at a location along supply line 326) where it is coupled to or otherwise connected to the main hydraulic circuit, thereby allowing pressurized hydraulic fluid from the main hydraulic circuit to pass through to the hydraulic circuit 300 without allowing any backflow. Check valve 338 may also be used to prevent any hydraulic shocks (e.g., due to sudden contact of the bottom cutter assembly 220 with the ground) from passing through the hydraulic circuit 300 to the main circuit and interfering with any other hydraulic functions of the machine.

[0051] In one embodiment, the pressure regulating valve (PRV) 322 may correspond to an electronically controlled valve, such as a solenoid valve comprising a solenoid 340 configured to actuate the valve 322 between an open and closed position based on electronic control signals received from an associated electronic controller 342, thereby regulating the pressure of hydraulic fluid supplied to the downstream actuator 302 via one or more actuator lines 328, 330, 332. In such an embodiment, the controller 342 may be communicatively coupled to one or more suitable input devices 344 (e.g., touchscreens, buttons, knobs, operator panels, and / or any other suitable human-machine interface) that allow the operator to provide input associated with setting the fluid pressure supplied to the actuator 302 and thus with setting the downforce or load applied to the ground via the bottom cutter assembly 220. For example, in one embodiment, the input devices 344 may be located in the operator's cab of the harvester to allow the operator to remotely adjust the pressure setting associated with the PRV 322.

[0052] It should be understood that controller 342 may typically correspond to one or more processor-based devices, such as one or more computing devices. Therefore, controller 322 may include one or more processors and associated memory devices, for example, configured to perform various computer-implemented functions (e.g., performing one or more methods, steps, algorithms, calculations, and / or similar). For example, the memory may typically be configured to store processor-accessible information, including data that can be retrieved, manipulated, created, and / or stored by the processor, and instructions that can be executed by the processor. For example, the memory may store computer-readable instructions that, when executed by the processor, configure controller 342 to control the operation of PRV 322 based on predetermined settings (e.g., operator-selected pressure settings or downpressure settings).

[0053] It should also be understood that controller 342 may correspond to an existing controller of the harvester / harvesting table, such as an existing harvester controller or harvesting table controller configured to control the operation of one or more components of the harvester and / or harvesting table. Alternatively, controller 342 may correspond to a separate processing unit. For example, in one embodiment, controller 342 may be formed as all or part of a separate plug-in module that can be mounted relative to the harvester and / or harvesting table to allow the desired valve control to be achieved without uploading additional software to the existing control unit of the harvester and / or harvesting table.

[0054] Still referencing Figure 5The hydraulic circuit 300 also includes an accumulator 350 in fluid communication with one of the actuator lines 328, 330, and 332. For example, as Figure 5 As shown, the accumulator is positioned downstream of the PRV 322 and upstream of the actuator 302 along actuator line 328. Typically, the accumulator 350 can be configured to maintain a substantially constant pressure within actuator line 328, thereby allowing a substantially constant fluid pressure to be applied within actuator 302 (e.g., within the cap-side chamber 314 of actuator 302), and thus allowing the application of desired downforce via the bottom cutter assembly 220. Specifically, the accumulator 350 can be used to prevent or minimize temporary pressure fluctuations within loop 300. For example, the accumulator 350 can be configured to release pressurized hydraulic fluid into actuator line 328 when the loop pressure drops below a desired pressure setpoint / range, and / or receive pressurized hydraulic fluid from actuator line 328 for storage when the loop pressure increases above the desired pressure setpoint / range.

[0055] Moreover, such as Figure 5 As shown, the hydraulic circuit 300 further includes a one-way flow control valve 352 for regulating the flow of hydraulic fluid supplied to and / or discharged from the fluid chambers 314, 316 of the actuator as the bottom cutter assembly 220 floats. In several embodiments, the flow control valve 352 may be configured to unidirectionally restrict fluid flow between the fluid chambers 314, 316 to regulate the speed of movement of the bottom cutter assembly 220 relative to the harvester frame 202 in one of its directions of movement, without substantially affecting the movement of the bottom cutter assembly 220 in the opposite direction. Specifically, in one embodiment, the flow control valve 352 may be configured to allow the associated bottom cutter assembly 220 to rise or move upward very rapidly or quickly relative to the harvester frame, thereby avoiding unnecessary impact or damage to the assembly 220 due to contact with the ground, while controlling the descent speed of the bottom cutter assembly 220 to prevent the assembly 220 from moving downward too quickly and hitting the ground.

[0056] For example, such as Figure 5As shown, the flow control valve 352 is fluidly connected to the second actuator line 332 and provides two flow paths along this line 332: a first flow path 354 including a check valve 356 and a second flow path 358 including a flow restricting orifice 360. In such an embodiment, when the bottom cutter assembly 220 contacts the ground and moves upward (e.g., along direction 318), the piston 304 is pushed upward within the cylinder 306, thereby expelling fluid from the cap-side chamber 314. In this case, the flow control valve 352 allows such fluid to be rapidly transferred from the cap-side chamber 314 to the rod-side chamber 316 via the first flow path 354 because the check valve 356 allows fluid flow in this direction. However, as the bottom cutter assembly 220 floats back down toward the ground in direction 320 (e.g., after the bottom cutter assembly 220 has passed or crossed a raised portion of the ground), the piston 304 is pulled downward within the cylinder 306, causing fluid to be discharged from the rod-side chamber 316. In this case, because the check valve 356 prevents fluid flow in the opposite direction, the fluid transferred from the rod-side chamber 316 to the cap-side chamber 314 is guided through a flow-limiting orifice 360 ​​positioned along the second flow path 358 of the flow control valve 352, thereby controlling the speed at which the fluid is transferred between chambers 314 and 316, and thus damping or slowing the downward movement or descent speed of the bottom cutter assembly 220. Therefore, the bottom cutter assembly 220 can move downward relative to the harvester frame at a controlled rate.

[0057] It should also be understood that, as described above, this subject matter also relates to a harvesting platform-based harvesting system suitable for use with agricultural harvesters, such as sugarcane harvesters. In several embodiments, the harvesting platform-based harvesting system may include a harvesting platform configured to be detachably coupled to the agricultural harvester, wherein the harvesting platform includes at least one floating bottom cutter assembly. For example, in one embodiment, the harvesting platform-based harvesting system may include the above-referenced... Figure 3 and Figure 4 One or more embodiments of the harvester 200 are described. Additionally, the harvester-based harvesting system may also include a hydraulic circuit for adjusting the floating motion of the bottom cutter assembly relative to the harvester frame via an associated hydraulic actuator. For example, in one embodiment, the harvester-based harvesting system may include the above-referenced... Figure 5 One or more embodiments of the hydraulic circuit 300 described, as well as any other related system components (e.g., controller 342 and (one or more) associated input devices 344).

[0058] This written description uses examples to disclose the invention, includes the best mode, and also enables any person skilled in the art to practice the invention, including making and using any apparatus or system and performing any of the included methods. The scope of the invention is defined by the claims, but may include other examples that may be conceived by a person skilled in the art. Such other examples are intended to be within the scope of the claims if they contain structural elements that are not different from the literal language of the claims, or if they contain equivalent structural elements that are not substantially different from the literal language of the claims.

Claims

1. A header-based harvesting system for an agricultural harvester, the harvesting system comprising: a header configured to be removably coupled to a front end of a harvester, the header including a header frame and a bottom cutter assembly coupled to the header frame in a floating arrangement; an actuator coupled between the header frame and the bottom cutter assembly; a hydraulic circuit in fluid communication with the actuator, the hydraulic circuit configured to permit the supply of pressurized hydraulic fluid to the actuator for regulating floating movement of the bottom cutter assembly relative to the header frame; wherein the harvesting system further comprises: a valve configured to control the supply of pressurized hydraulic fluid to at least one actuator line of the hydraulic circuit, the at least one actuator line extending between the valve and the actuator; a pressure accumulator fluidly coupled to the at least one actuator line downstream of the valve; and wherein the pressure accumulator is configured to maintain a substantially constant fluid pressure within the at least one actuator line.

2. The harvesting system of claim 1, wherein, the hydraulic circuit is configured such that the actuator exerts a substantially constant downforce on the bottom cutter assembly during floating movement of the bottom cutter assembly relative to the header frame.

3. The harvesting system of claim 2, wherein, the actuator includes a double-acting hydraulic cylinder configured to regulate floating movement of the bottom cutter assembly in both a first direction and a second direction opposite the first direction, the hydraulic circuit permitting the supply of pressurized hydraulic fluid to the actuator to permit the actuator to exert the substantially constant downforce during floating movement of the bottom cutter assembly relative to the header frame in both the first direction and the second direction.

4. The harvesting system of claim 1, wherein, the valve includes a pressure regulating valve configured to supply the pressurized hydraulic fluid to the at least one actuator line at the substantially constant fluid pressure.

5. The harvesting system of claim 4, wherein: the pressure regulating valve includes an electronically controllable pressure regulating valve; the harvesting system further comprises a controller communicatively coupled to the pressure regulating valve; and the controller is configured to control operation of the pressure regulating valve based on a predetermined setting selected for the pressure regulating valve.

6. The harvesting system of claim 5, wherein, the predetermined setting includes an operator-selected setting associated with a desired downforce to be exerted by the bottom cutter assembly.

7. The harvesting system of claim 1, wherein: the actuator includes a double-acting hydraulic cylinder including first and second fluid chambers defined along opposite sides of an associated piston; and the hydraulic circuit includes at least one actuator line fluidly coupling the first fluid chamber to the second fluid chamber to permit the transfer of pressurized hydraulic fluid between the first and second fluid chambers during floating movement of the bottom cutter assembly relative to the header frame.

8. The harvesting system of claim 7, wherein: the bottom cutter assembly is configured to move relative to the header frame in both a first direction and a second direction opposite the first direction; the harvesting system further comprises a flow control valve disposed in association with the at least one actuator line; and the flow control valve is configured to unidirectionally restrict fluid flow between the first fluid chamber and the second fluid chamber to regulate a speed of movement of the bottom cutter assembly relative to the header frame in one of the first direction or the second direction.

9. The harvesting system of claim 8, wherein: the first direction is associated with upward movement of the bottom cutter assembly relative to the header frame and the second direction is associated with downward movement of the bottom cutter assembly relative to the header frame; and the flow control valve is configured to restrict fluid flow between the first fluid chamber and the second fluid chamber to regulate a speed of descent of the bottom cutter assembly during downward movement of the bottom cutter assembly relative to the header frame.

10. The harvesting system of claim 1, wherein, the bottom cutter assembly is coupled to the header frame of the header via a telescoping arrangement.

11. A header for an agricultural harvester, the header comprising: a header frame configured to be removably coupled to a front end of an agricultural harvester; a bottom cutter assembly coupled to the header frame, the bottom cutter assembly including at least one cutting blade and a drive assembly configured to rotationally drive the at least one cutting blade; a linkage assembly coupling the bottom cutter assembly to the header frame such that the bottom cutter assembly is movable relative to the header frame in both a first direction and a second direction opposite the first direction; and an actuator coupled between the header frame and the bottom cutter assembly, the actuator configured to allow the bottom cutter assembly to float relative to the header frame in both the first direction and the second direction; wherein the header further comprises: a valve configured to control supply of pressurized hydraulic fluid to at least one actuator line of a hydraulic circuit, the at least one actuator line extending between the valve and the actuator; an accumulator fluidly coupled to the at least one actuator line downstream of the valve; and wherein the accumulator is configured to maintain a substantially constant fluid pressure within the at least one actuator line.

12. The harvesting header of claim 11, wherein, the bottom cutter assembly is coupled to the header frame in a telescoping arrangement.

13. The harvesting header of claim 12, wherein, the linkage assembly includes first and second pivot arms pivotably coupling the bottom cutter assembly to the header frame, wherein the first and second pivot arms form a four-bar linkage with the bottom cutter assembly and the header frame.

14. The harvesting header of claim 11, further comprising a hydraulic circuit in fluid communication with the actuator, the hydraulic circuit being configured to permit the supply of pressurized hydraulic fluid to the actuator to cause the actuator to exert a generally constant downforce on the bottom cutterbar assembly during the floating movement of the bottom cutterbar assembly relative to the header frame.

15. The harvesting header of claim 11, wherein, the valve comprises a pressure regulating valve configured to supply the pressurized hydraulic fluid to the at least one actuator line at the generally constant fluid pressure.

16. The harvesting header of claim 14, wherein: the actuator comprises a double-acting hydraulic cylinder including first and second fluid chambers defined along opposite sides of an associated piston; and the hydraulic circuit includes at least one actuator line fluidly coupling the first fluid chamber to the second fluid chamber to permit the transfer of pressurized hydraulic fluid between the first and second fluid chambers during the floating movement of the bottom cutterbar assembly relative to the header frame.

17. The harvesting header of claim 16, wherein: the harvesting header further comprises a flow control valve disposed in association with the at least one actuator line; and the flow control valve is configured to unidirectionally restrict fluid flow between the first and second fluid chambers to regulate a speed of movement of the bottom cutterbar assembly relative to the header frame in one of the first or second directions.

18. The harvesting header of claim 17, wherein: the first direction is associated with upward movement of the bottom cutterbar assembly relative to the header frame and the second direction is associated with downward movement of the bottom cutterbar assembly relative to the header frame; and the flow control valve is configured to restrict fluid flow between the first and second fluid chambers to regulate a rate of descent of the bottom cutterbar assembly during downward movement of the bottom cutterbar assembly relative to the header frame.

Images