Patent Application
20230046458
The present disclosure generally relates to agricultural harvesters and, more particularly, to a system for harvesting the tops portions of plants growing within a field and a related agricultural harvester.
A combine harvester is a type of agricultural harvester used to harvest grain crops, such as wheat, oats, rye, barley, corn, soybeans, etc. More specifically, a combine harvester typically includes a detachable header or other harvesting implement. The header, in turn, cuts and collects the crop from the field for delivery to a crop processing system of the combine harvester. The crop processing system then performs various processing operations (e.g., threshing, separating, etc.) on the received harvested crop. Thereafter, the processed harvested crop may be delivered to a crop tank for storage.
Grain crops are typically harvested at single time during the growing season. In the respect, the header of a combine harvesters cuts the stalks of the crops being harvested just above the field surface, leaving behind stubble. This stubble will then be broken and incorporated into the soil during a subsequent tillage operation. However, it is beneficial for the different portions of some plants to be harvested at different times. For example, it is generally desirable to harvest the flowers of a hemp plant before harvesting the stalks. Combine harvesters and other types of agricultural harvesters are generally unable to do this. Moreover, the crop processing system of a combine harvester separates the grain from the chaff by rubbing or beating the harvester grain crop. Such rubbing will damage hemp flowers and other delicate top portions of certain plants.
Aspects and advantages of the technology will be set forth in part in the following description, or may be obvious from the description, or may be learned through practice of the technology.
In one aspect, the present subject matter is directed to an agricultural harvester. The agricultural harvester includes an annular housing having an arcuate cross-section such that the annular housing defines a toroidal chamber therein. Furthermore, the agricultural harvester includes a blade supported below the annular housing in a vertical direction, with the blade configured to sever top portions of plants from stalks of the plants. Additionally, the agricultural harvester includes a crop flow director positioned above the blade in the vertical direction, with the crop flow director configured to direct the severed top portions into the toroidal chamber. Moreover, the agricultural harvester includes an elevator assembly supported relative to the annular housing. In addition, the agricultural harvester includes a fan assembly configured to generate a flow of air through the toroidal chamber to convey the severed top portions from the toroidal chamber to the elevator assembly.
In another aspect, the present subject matter is directed to a system for harvesting top portions of plants. The system includes an annular housing having an arcuate cross-section such that the annular housing defines a toroidal chamber therein. Furthermore, the system includes a blade supported below the annular housing in a vertical direction, with the blade configured to sever the top portions of the plants from stalks of the plants. Additionally, the system includes a crop flow director positioned above the blade in the vertical direction, with the crop flow director configured to direct the severed top portions into the toroidal chamber. Moreover, the system includes an elevator assembly supported relative to the annular housing. In addition, the system includes a fan assembly configured to generate a flow of air through the toroidal chamber to convey the severed top portions from the toroidal chamber to the elevator assembly.
These and other features, aspects and advantages of the present technology will become better understood with reference to the following description and appended claims. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the technology and, together with the description, serve to explain the principles of the technology.
A full and enabling disclosure of the present technology, including the best mode thereof, directed to one of ordinary skill in the art, is set forth in the specification, which makes reference to the appended figures, in which:
Repeat use of reference characters in the present specification and drawings is intended to represent the same or analogous features or elements of the present technology.
Reference now will be made in detail to embodiments of the invention, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present invention covers such modifications and variations as come within the scope of the appended claims and their equivalents.
In general, the present subject matter is directed to a system for harvesting the top portions of plants and a related agricultural harvester. Specifically, in several embodiments, the system includes an annular housing having an arcuate cross-section such that the annular housing defines a toroidal chamber therein. Furthermore, the system includes a blade supported below the annular housing. In this respect, the blade is configured to sever or cut the top portions of the plants growing within a field from their stalks. For example, in one embodiment, the blade may sever the top portions by rotating relative to the annular housing. Additionally, the system includes a crop flow director positioned above the blade. In some embodiments, the crop flow director may be positioned within a central passage defined by the annular housing. Thus, the crop flow director configured to direct the severed top portions of the plants into the toroidal chamber. Moreover, the system includes an elevator assembly supported relative to the annular housing. In addition, the system includes a fan assembly configured to generate a flow of air through the annular housing to convey the severed top portions from the toroidal chamber to the elevator assembly. The elevator assembly may, in turn, deliver severed top portions to a crop tank for storage.
The disclosed system and agricultural harvester allow for the harvesting of certain crops (e.g., hemp) that cannot be harvested using conventional harvesters (e.g., a combine harvester). More specifically, the disclosed system and harvester sever only the top portion of the plant (e.g., the hemp flowers), leaving behind the stalks for harvesting at a later time. Moreover, as described above, the disclosed system and harvester sever the top portions of the plants with the blade, direct the severed top portions into the toroidal chamber with the crop flow director, and convey to the elevators using a flow of air through the toroidal chamber for storage in a crop tank. As such, the disclosed system and harvester allow the top portions of the plants to be harvested and conveyed to the crop tank for storage therein without rubbing, beating, or other rough contact, thereby preventing damage to the top portions. For example, when harvesting hemp flowers, such delicate handling preserves the fragile crystalline surface chemicals used to produce cannabidiol (CBD) oil that are present on the flowers.
Referring now to the drawings,
The harvester 10 may include a frame or chassis 20 configured to support and/or couple to various components of the harvester 10. For example, in several embodiments, the harvester 10 may include a pair of driven, front wheels 22 and a pair of steerable, rear wheels 24 coupled to the frame 20. As such, the wheels 22, 24 are configured to support the harvester 10 relative to the ground and move the harvester 10 in the forward direction of travel 12. In some embodiments, the wheels 22, 24 are sized such that the frame 20 is positioned above the top portions 14 of the plants 16. Furthermore, the harvester 10 may include an operator's cab 26, one or more crop cutting assemblies 102, an elevator assembly 104, and a crop tank 28 supported by the frame 22. In some embodiments, the crop cutting assembly(ies) 102 are positioned underneath or otherwise at the bottom of the harvester 10 to provide access to the top portions of the plants growing within the field. Additionally, the harvester 10 may include an engine 30 and a transmission 32 mounted on the frame 22. The transmission 32 may be operably coupled to the engine 30 and may provide variably adjusted gear ratios for transferring engine power to the wheels 22, e.g., via a chain drive assembly(ies) (not shown).
As mentioned above, the agricultural harvester 10 is configured to harvest the top portions 14 of the plants 16, while leaving the stalks 18 standing in the field. More specifically, as the harvester 10 travels across the field in the direction of travel 12, the crop cutting assembly(ies) 102 cuts or severs the top portions 14 of the plants 16 (e.g., the flowers of hemp plants) from their stalks 18 and directs the severed top portions 14 to the elevator assembly 104. Thereafter, the elevator assembly 104 conveys the severed top portions 14 to the crop tank 28 for storage.
Additionally, in some embodiments, the position of the crop cutting assembly(ies) 102 may be adjustable relative to the ground along a vertical direction (indicated by arrow 34). In this respect, the operator may raise or lower the crop cutting assembly(ies) 102 relative to the ground to adjust the cutting height of the assembly(ies) 102. As such, the harvester 10 can harvest the top portions of plants having differing heights. In one embodiment, the height of the frame 20 (and, thus, the operator's cab 26, the crop cutting assembly(ies) 102, the elevator assembly 104, and the crop tank 28 supported thereon) may collectively be adjustable relative to the ground. In other embodiments, the crop cutting assembly(ies) 102 may be adjustable relative to the frame 20 in the vertical direction 34, with the height of the frame 20 relative to the ground being fixed. Thus, in such embodiments, by adjusting the position of the crop cutting assembly(ies) 102 relative to the frame 20, the height of the crop cutting assembly(ies) 102 relative to the ground can be adjusted. However, in alternative embodiments, the position of the crop cutting assembly(ies) 102 relative to the ground may be fixed.
It should be further appreciated that the configuration of the agricultural harvester 10 described above and shown in
Referring now to
In several embodiments, the system 100 includes one or more crop cutting assemblies 102. As indicated above, each crop cutting assembly 102 is configured to cut or sever the top portions of the plants (e.g., the flowers of hemp plants) from their stalks and direct the severed top portions to the elevator assembly 104. In the illustrated embodiment, the system 100 includes a pair of crop cutting assemblies 102 positioned side by side such that the assemblies 102 are aligned with each other in the direction of travel 12. However, in alternative embodiments, the system 100 may include any other suitable number of crop cutting assemblies 102. For example, in one embodiment, the system 100 may include only a single crop cutting assembly 102.
Furthermore, the system 100 includes the elevator assembly 104. As indicated above, the elevator assembly 104 is configured to convey the severed top portions of the plants from the crop cutting assembly(ies) 102 to the crop tank 28 (
The elevator assembly 104 may have any suitable construction or configuration that allows the severed top portions of the plants to be conveyed from the cutting assembly(ies) 102 to the crop tank 28. For example, in one embodiment, the elevator assembly 104 may include a looped chain (not shown) and a plurality of paddles (not shown) attached to and evenly spaced along the chain. Each paddle may, in turn, be configured to hold a quantity of the severed top portions of the plants as the chain is driven in an endless loop, thereby conveying the top portions along the length of the elevator assembly 104.
Moreover, the system 100 includes a fan assembly 106. In general, the fan assembly 106 is configured to generate a flow of air through the crop cutting assembly(ies) 102 and into the elevator assembly 104. This air flow, in turn, conveys the severed top portions of the plants from the crop cutting assembly(ies) 102 to the elevator assembly 104. In the illustrated embodiment, fan assembly 106 is positioned forward of the crop cutting assembly(ies) 102 relative to the direction of travel 12. However, in alternative embodiments, the fan assembly 106 may be positioned at any other suitable location relative to the crop cutting assembly(ies) 102. In addition, the fan assembly 106 may be driven in any suitable manner, such as via a belt coupled to an accessory drive (not shown) of the engine 30, a hydraulic motor, an electric motor, and/or the like.
As shown in
Referring particularly to
Moreover, the crop cutting assembly 102 includes the crop flow director 110. In general, the crop flow director 110 is configured to direct the top portions of the plants severed from their stalks by the blade 118 radially outward and into the toroidal chamber 112 defined by the annular housing 108. As shown, the crop flow director 110 is supported above the blade 118 in the vertical direction 34 such that the crop flow director 110 is positioned within the central passage 114 defined by the annular housing 108. In several embodiments, the crop flow director 110 may be configured to rotate relative to the annular housing 108 to direct the severed top portions of the plants into the toroidal chamber 112. For example, in some embodiments, the crop flow director 110 and the blade 118 may be configured to rotate (e.g., as indicated by arrow 120 in
Referring now to
In addition, the crop flow director 110 may also include a plurality of circumferentially spaced apart fins 136 coupled to the frustoconical wall 126. The fins 136 are, in turn, configured to direct the top portions of the plants severed from their stalks by the blade 118 into the toroidal chamber 112. As such, the fins 136 may be spaced apart from each other around the circumference of the frustoconical wall 126. Furthermore, the fins 126 may extend outward from the frustoconical wall 126 (e.g., on the side of the wall 126 facing the blade 118). In some embodiments, as shown in
As mentioned above, in some embodiments, the system 100 (or the associated harvester 10) may include two crop cutting assemblies 102 positioned side by side. In such embodiments, the system 100 may include two annular housings 108, two blades 118, and two crop flow directors 110. Each annular housing 108 may, in turn, define a toroidal chamber 112 such that the system 100 includes two toroidal chambers 112. Moreover, in such embodiments, the system 100 may include a single fan assembly 106 and a single elevator assembly 104. In this respect, the fan assembly 106 generates a flow of air through both toroidal chambers 112, thereby conveying the top portions of the plants harvested by both crop cutting assemblies 102 to the elevator assembly 104 for eventual delivery to the crop tank 28.
As mentioned above, the system 100 is configured to harvest the top portions of plants growing within a field. More specifically, as the harvester 10 travels across the field in the direction of travel 12, the blade(s) 118 and the crop flow director(s) 110 may rotate relative to the annular housing(s) 108. In this respect, the rotation of the blade(s) 118 severs the top portions of the plants (e.g., the top portions 14 of the plants 16 in
Furthermore, as mentioned above, the system 100 and related harvester 10 may be used to harvest the flowers of hemp plants. More specifically, the flowers of a hemp plant can be used to produce CBD oil, while the stalks of the hemp plant can be used in the industrial materials market. In general, it is desirable to harvest the flowers of the hemp plants earlier than the stalks of the hemp plants. This ensures that the hemp flowers are harvested while at higher moisture state and before seeds are produced, thereby preserving the fragile crystalline chemicals on the surface of the flowers (sometimes referred to as kief) used to make CBD oil. In this respect, the disclosed system 100 and harvester 10 allow the flowers of the hemp plants to be harvested, while leaving the stalks of the hemp plants standing within the field for harvesting at a later time (e.g., with a forage harvester or windrower). Moreover, the hemp flowers are delicate and can be easy damaged when handled. As such, by directing the severed hemp flowers into the toroidal chamber(s) 112 with the crop flow director 110 and using a flow(s) of air through the toroidal chamber(s) 112 to convey the flowers to the elevator assembly 104, the hemp flowers are transported from the blade(s) 118 to the elevator assembly 104 without any rubbing, beating, or other rough contact. Thus, the disclosed system 100 and harvester 10 provide for gentle and minimal handling of the hemp flowers, thereby preventing or reducing damage of to the flowers (particularly to the kief).
This written description uses examples to disclose the technology, including the best mode, and also to enable any person skilled in the art to practice the technology, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the technology is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they include structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal language of the claims.
