Self-propelled harvester with adjustable transfer height

Abstract

The present invention relates to a self-propelled harvester capable of adjusting the conveying height, comprising a digging unit for digging up crops within a ridge, a conveying unit for conveying the crops dug up by the digging unit to the rear, and a sorting unit for sorting the crops conveyed and discharged from the conveying unit. The digging unit and the conveying unit are configured to move up and down while maintaining an inclined angle by means of a lifting mechanism on a base frame, and a conveying belt is provided that rotates while connecting the conveying unit and the sorting unit, and maintains the connection between the conveying unit and the sorting unit while adjusting the angle between the conveying unit and the sorting unit according to the height of the conveying unit moving up and down.

Description

Technology Field

[0001] The present invention relates to a self-propelled harvester capable of adjusting the conveying height, and more specifically, to a self-propelled harvester capable of adjusting the conveying height in which, when a conveying unit that conveys underground crops excavated by an excavation unit moves up and down while maintaining an incline, the conveying belt between the conveying unit and the sorting unit is angle-adjusted according to the position (height) of the conveying unit. Background Technology

[0002] Generally, underground crops are referred to as bulbs and include tuberous crops, in which roots form a mass underground to store nutrients, and tuberous crops, in which stems form a mass underground. A representative example of a tuberous crop is the sweet potato, and a representative example of a tuberous crop is the potato.

[0003] These bulbs can be harvested by digging up the ground with agricultural tools such as hoes. When the crop cultivation area is small, harvesting can be done easily with minimal labor, but since large-scale cultivation requires a lot of labor, harvesting devices using mechanical power are used to lower production costs.

[0004] This harvesting device is equipped with a blade section inserted into the ground to a predetermined depth for excavating bulbs, and a conveyor in the rear area of ​​the blade section that conveys the soil and bulbs excavated by the blade section to the ground behind it.

[0005] Here, the conveyor is formed as an endless track type having a plurality of rod sections arranged parallel to each other so as to separate and convey bulbs provided by the blade section from the soil, and the rear section is arranged to be inclined upward so that the front section adjacent to the blade section is positioned on the lower side along the direction of movement.

[0006] At this time, the harvesting device is coupled to the rear area of ​​a towing vehicle such as a tractor, and as the towing vehicle moves forward, the blade part is inserted into the ground at an angle to a predetermined depth, thereby excavating the soil and bulbs by the blade part and moving upward to the rear area.

[0007] Then, the transported soil and bulbs are placed on a conveyor that rotates clockwise, and foreign materials such as relatively small soil particles or small stones fall to the ground through the space between the load sections and are separated, while the bulbs are transported to a sorting section at the rear of the conveyor for sorting and classification.

[0008] However, in conventional harvesting devices, the blade section is fixed in a downwardly inclined state in front of the conveyor, and the conveyor is connected and fixed in a state inclined at a certain angle in front of the sorting section. Therefore, since the conveyor and the digging section are always provided at a constant height regardless of the height of the ridge, there is a disadvantage of reduced digging efficiency.

[0009] In other words, when the ridge is high, the shovel blade gets stuck too deeply into the ridge, which has the disadvantage of hindering the smooth movement of the harvesting device, and when the ridge is low, the shovel blade cannot get stuck deep enough for excavation, which has the disadvantage of hindering smooth excavation.

[0010] In addition, as another example, even if it is assumed that the height of the blade section and the conveyor can be adjusted according to the height of the ridge, when the conveyor is moved upward, a high step difference occurs between the conveyor and the sorting section, and crops transported from the conveyor fall to the sorting section at a lower position and are discharged, so the crops may be damaged due to the large drop, which has the disadvantage of directly leading to a deterioration in crop quality. Prior art literature

[0011] Republic of Korea Registered Patent No. 10-0364387 The problem to be solved

[0012] Accordingly, the present invention has been devised to solve the problems of the prior art as described above, and aims to provide a self-propelled harvester capable of adjusting transport height, wherein the excavation unit and the transport unit can move up and down while maintaining an inclination, and the transport belt connecting the transport unit and the sorting unit can continuously connect the transport unit and the sorting unit while adjusting the angle according to the position (height) of the transport unit. means of solving the problem

[0013] A self-propelled harvester capable of adjusting the conveying height according to the present invention for achieving the above-mentioned purpose comprises a digging unit for digging up crops within a ridge, a conveying unit for conveying crops dug up by the digging unit to the rear, and a sorting unit for sorting crops conveyed and discharged from the conveying unit. The digging unit and the conveying unit are configured to move up and down while maintaining an inclined angle by means of a lifting mechanism on a base frame, and a conveying belt is provided that rotates while connecting the conveying unit and the sorting unit, and maintains the connection between the conveying unit and the sorting unit while adjusting the angle between the conveying unit and the sorting unit according to the height of the conveying unit moving up and down.

[0014] In addition, the conveyor belt may be provided with a front end hinged to the conveyor, and a rear end mounted on the sorting unit and equipped with a guide bracket that can move and rotate within the sorting unit, so that as the conveyor unit moves up and down, the front end of the conveyor belt rotates up and down around the guide bracket at the rear as an axis, thereby enabling angle adjustment of the conveyor belt.

[0015] In addition, a bent hook portion is formed on the guide bracket of the conveyor belt, and the guide bracket is movably mounted on the sorting section, while a stop pin is provided to prevent the conveyor belt from coming off by engaging the hook portion of the moving guide bracket.

[0016] In addition, the conveyor belt may be equipped with a fall prevention plate to prevent crops from falling when being conveyed from the conveyor section to the sorting section. The fall prevention plate may be configured to open the flow path of the conveyor belt when the conveyor section is moved downward and the conveyor belt is maintained horizontally, and to block the flow path of the conveyor belt when the conveyor section is moved upward and the conveyor belt is angle-adjusted, thereby preventing crops from falling.

[0017] In addition, a cover plate is provided with one end hinged to the conveying part on the upper side of the conveying belt and a fall prevention plate fixed to the other end, and a support link is provided with both ends hinged to the cover plate and the conveying belt, so that when the conveying part moves up and down, the conveying belt, the support link, and the cover plate rotate in conjunction to rotate the fall prevention plate up and down.

[0018] Meanwhile, the lifting means may include a support frame fixedly provided on a base frame and coupled so that the transfer part slides up and down while maintaining an inclined angle; and a lifting cylinder having both ends hinged to the support frame and the transfer part, respectively, to move the transfer part up and down from the support frame.

[0019] In addition, the excavation unit may include an excavation plate that is provided to protrude downward forward from the conveying unit to excavate underground crops; and a shaking sieve that is provided at the rear of the excavation plate so that the other end rotates up and down around one end as an axis to shake off soil from the excavated underground crops.

[0020] In addition, the digging section may be equipped with a camshaft that is configured to rotate in place at the lower part of the shaking net and lifts the shaking net upward.

[0021] In addition, the digging unit is provided with a crop supply unit that supplies underground crops dug up from the upper part of the digging plate to a shaking net, wherein the crop supply unit may include a hinge bracket provided by hinge connection to the upper part of the digging plate; a rotating shaft provided to rotate in place on the hinge bracket; and a supply blade provided to protrude radially from the outer circumference of the rotating shaft to transport and supply the dug-up underground crops to the shaking net side.

[0022] Additionally, the conveying unit may include: two side plates installed at an angle on the base frame; a chain wound around each of the two side plates and rotated; a plurality of rod bars with their ends connected to each of the two chains and rotating together with the chain; and a plurality of finger bars protruding outward from each rod bar and arranged along the axial direction of the rod bar to lift excavated underground crops and convey them to the rear. Effects of the invention

[0023] According to the self-propelled harvester with adjustable conveying height of the present invention, the digging unit and the conveying unit can move up and down while maintaining an inclination, and the conveying belt connecting the conveying unit and the sorting unit can continuously connect the conveying unit and the sorting unit while adjusting the angle according to the position (height) of the conveying unit, thereby preventing damage to crops discharged from the conveying unit to the sorting unit and thus improving the quality of the crops. Brief explanation of the drawing

[0024] FIG. 1 is a schematic diagram illustrating a potato harvester as an example of a self-propelled harvester according to the present invention. FIG. 2 is a side view of a potato harvester according to the present invention. FIG. 3 is a diagram showing the configuration of a connecting part configured in a potato harvester according to the present invention. FIG. 4 is a configuration diagram of a connecting part according to the present invention, FIG. 4a is a diagram of the connecting part separated from the conveying part and the sorting part, and FIG. 4b is an enlarged configuration diagram of the connecting part. FIG. 5 is a diagram illustrating the connection state between the conveying unit, the connecting unit, and the sorting unit according to the present invention, and is a side view of the configuration in which the connecting unit is positioned horizontally. Figure 6 is an enlarged view of "A" in Figure 5. FIG. 7 is a diagram illustrating the connection state between the conveying unit, the connecting unit, and the sorting unit according to the present invention, and is a side view of the configuration in which the connecting unit is angle-adjusted. Figure 8 is an enlarged view of "B" in Figure 7. FIG. 9 is a diagram showing the configuration of a conveying unit configured in a potato harvester according to the present invention. FIG. 10 is an exploded view of a lifting means configured in a conveying unit according to the present invention. FIG. 11 is a front view of the digging section and crop supply section configured in the potato harvester according to the present invention. FIG. 12 is a rear view of the excavation unit according to the present invention. FIG. 13 is an operation diagram of a shaking net configured in an excavation unit according to the present invention. FIG. 14 is a drawing of a crop supply unit according to the present invention in a state where it is rotated upward. Specific details for implementing the invention

[0025] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0026] The terms used in this invention are defined in consideration of their functions within the invention; however, since these may vary depending on the intentions or practices of the user or operator, the definitions of these terms should be interpreted in a sense and concept consistent with the technical details of this invention.

[0027] In addition, the embodiments of the present invention are not intended to limit the scope of the rights of the present invention, but are merely exemplary details of the components presented in the claims of the present invention, and are embodiments that include components that are included in the technical concept throughout the specification of the present invention and can be substituted as equivalents for the components of the claims.

[0028] Additionally, optional terms in the following examples are used to distinguish one component from another, and the components are not limited by said terms.

[0029] Accordingly, in describing the present invention, detailed descriptions of related prior art that may unnecessarily obscure the essence of the invention are omitted.

[0030] The attached drawings, FIGS. 1 to 14, are drawings illustrating a self-propelled harvester according to the present invention and each of its components.

[0031] The self-propelled harvester according to the present invention is a harvester capable of autonomous driving and operation by the operation of a driver seated in the driver's seat, separate from a tractor. In this embodiment, a potato harvester that digs up and harvests potatoes, a representative underground crop, is described as an example.

[0032] As shown in FIGS. 1 and 2, this potato harvester (100) is configured in order from the front to the rear of the base frame (110) with a digging section (200), a crop supply section (300), a conveying section (400), a connecting section (500), a sorting section (600), and a collecting section (700).

[0033] First, the base frame (110) is a component that forms the framework of the potato harvester (100), and on both sides of the base frame (110), crawlers or wheels, which are driving means driven by power, are rotatably provided.

[0034] This driving means is controlled to drive, stop, and steer by operation from the driver's seat provided at the front of the base frame (110), thereby enabling the potato harvester (100) to move independently along the ridge.

[0035] In particular, the potato harvester (100) of the present invention has the advantage of being able to easily operate by positioning the driver's seat (120) at the front upper part of the base frame (110), thereby making it easier to secure the driver's view compared to when the driver's seat is located on the side, and allowing the harvester to move smoothly on narrow farm roads, as well as avoiding interference when loading harvested potatoes onto a transport truck.

[0036] In addition, a plurality of side mirrors (122) are provided on the front side of the driver's seat (120) to check the side and rear of the potato harvester (100), and a display panel (121) is provided on one side of the driver's seat (120) through which a height adjustment rod (470) that moves up and down, as described later, is provided.

[0037] A scale indicating the moved height of the transfer unit (400), which will be described later, may be displayed on the height adjustment unit (470), and an indicator such as an arrow pointing to the scale of the height adjustment unit (470) may be provided on the upper surface of the display panel (121), while an upper / lower indicator indicating the rotational position of the rotated crop supply unit (300) in an angle may be provided in conjunction with the upper / low rotation of the crop supply unit (300), which will be described later.

[0038] Accordingly, the driver can easily check the height of the vertically moving conveying unit (400) and digging unit (200) and the rotated position of the crop supply unit (300) while seated in the driver's seat (120).

[0039] And, as shown in FIG. 3, the connecting part (500) is configured to safely transfer crops discharged from the transfer part (400) to the sorting part (600) between the transfer part (400) and the sorting part (600) to be described later.

[0040] As shown in FIGS. 4a and 4b, this connecting part (500) includes a conveyor belt (510) that maintains the connection between the conveyor part (400) and the sorting part (600) by rotating and driving the conveyor part (400) and adjusting the angle between the conveyor part (400) and the sorting part (600) according to the height of the conveyor part (400) which moves up and down, while connecting the rear end of the conveyor part (400) and the front end of the sorting part (600).

[0041] The conveyor belt (510) has its front end hinged to the rear end of the conveyor section (400), and its rear end is equipped with a guide bracket (512) that is mounted on the front end of the sorting section (600) and can move and rotate within the sorting section (600).

[0042] In particular, the front end of the conveyor belt (510) is constrained to the conveyor (400) through a hinge part (510a) that is hinge-connected to the rear end of the conveyor (400), whereas the rear end of the conveyor belt (510) is simply mounted by a guide bracket (512) that is seated on a stop pin (611) of the sorting unit (600) to be described later. Therefore, as the conveyor (400) moves up and down, the front end of the conveyor belt (510) rotates up and down around the guide bracket (512) of the rear end as an axis, thereby allowing for angle adjustment of the conveyor belt (510).

[0043] This conveyor belt (510) is configured to rotate like an endless track by having a belt member wound around a drive shaft and a driven shaft, which are respectively rotatably coupled to the front and rear portions between the two side plates (511). The drive shaft of the front portion of the conveyor belt (510) is connected to the motor shaft of a motor, which is a driving source, by a chain.

[0044] At this time, the drive shaft described above is provided as a hinge part (510a) by passing through both side plates (511) of the conveyor belt (510) and being rotatably coupled to the rear end of the conveyor part (400), and guide brackets (512) protruding backward are each fixedly provided on both side plates (511) of the rear of the conveyor belt (510).

[0045] These two guide brackets (512) are mounted on stop pins (611) on both sides of the sorting section (600) to be described later, and are configured to be able to move back and forth and rotate. A "⊃" shaped hook portion (512a) is formed at the rear end of one of the two guide brackets (512) and is bent downward, and a "ㄱ" shaped hook portion (512b) is formed at the rear end of the other guide bracket (512) and is bent vertically downward. Here, in this embodiment, a hook portion (512a) is formed on one guide bracket (512) and a catch portion (512b) is formed on the other guide bracket (512) as an example, but the hook portion (512a) or the catch portion (512b) may be selectively formed only on one of the guide brackets (512), or the hook portion (512a) or the catch portion (512b) may be formed equally on both guide brackets (512).

[0046] Thus, when the conveyor belt (510) is rotated upward by the conveyor unit (400) to be described later, as shown in FIGS. 7 and 8, the gap between the conveyor unit (400) and the sorting unit (600) narrows, causing both guide brackets (512) of the conveyor belt (510) to be pushed backward on the sorting unit (600) and rotate upward, and when the conveyor belt (510) is rotated downward by the conveyor unit (400) to be described later, as shown in FIGS. 5 and 6, the gap between the conveyor unit (400) and the sorting unit (600) widens, causing both guide brackets (512) of the conveyor belt (510) to be moved forward on the sorting unit (600) and rotate downward.

[0047] Accordingly, as the conveyor belt (510) rotates up and down, the guide brackets (512) that move back and forth on the sorting section (600) and rotate are provided such that the hook portion (512a) and the catch portion (512b) of the rear end are caught on the stop pin (611) of the sorting section (600) to be described later, thereby preventing the accident of the connecting section (500) being separated and detached from the sorting section (600) in advance, and thereby enabling stable potato harvesting operation.

[0048] Meanwhile, the conveyor belt (510) described above is equipped with a fall prevention plate (521) to prevent crops from falling from the conveyor section (400) to the sorting section (600), and the fall prevention plate (521) is fixed to the rear end of a cover plate (520) that is hinge-connected to the rear of the conveyor section (400) so as to rotate in conjunction as the conveyor section (400) moves up and down.

[0049] To this end, the front end of a flat cover plate (520) is hinge-connected to the rear end of the conveying section (400) on the upper side of the conveying belt (510), and a fall prevention plate (521) is fixed to the rear end of the cover plate (520) in a tilted state spread out at a certain angle, i.e., an obtuse angle.

[0050] And, the lower ends of the support links (530) are hinged to each of the two sides of the conveyor belt (510), and the upper ends of the two support links (530) are hinged to each of the two rear sides of the cover plate (520).

[0051] At this time, the front end of the cover plate (520) hinged to the rear end of the conveying part (400) is provided as a front hinge part (520a), the rear end of the cover plate (520) hinged to the upper end of the support link (530) is provided as a rear hinge part (520b), and the lower end of the support link (530) hinged to both sides of the conveying belt (510) is provided as a hinge part (530a).

[0052] Thus, the cover plate (520) is provided to be supported by both support links (530) and is provided to rotate up and down with respect to the front hinge portion (520a).

[0053] In addition, the fall prevention plate (521) has an area and height sufficient to block the passage between the cover plate (520) and the conveyor belt (510), and is equipped with a rubber plate to prevent damage to crops passing through the fall prevention plate (521) as much as possible, thereby cushioning crops that fall due to the fall and preventing damage or breakage to crops as much as possible while controlling the rapid movement of crops.

[0054] At this time, a plurality of cut sections (521a) are formed at regular intervals on the lower side of the fall prevention plate (521) by cutting the fall prevention plate (521) in the longitudinal direction (up and down direction), so that the lower part of the fall prevention plate (521) is divided into several pieces of unit members, thereby allowing crops transported by the conveyor belt (510) to pass through smoothly and be discharged.

[0055] Thus, the drop prevention plate (521) provided as described above is configured to rotate up and down by the coordinated rotation of the conveyor belt (510), support link (530), and cover plate (520) that rotate up and down when the conveyor unit (400) moves up and down, thereby opening and closing the passage between the cover plate (520) and the conveyor belt (510).

[0056] That is, when the conveying unit (400) is moved downward and the conveying belt (510) is positioned horizontally between the conveying unit (400) and the sorting unit (600), as shown in FIGS. 5 and 6, both support links (530) are positioned vertically upward as much as possible, and the cover plate (520) is supported by both support links (530) in a rotated state with the cover plate (520) lifted upward as much as possible, so that the fall prevention plate (521) at the rear end of the cover plate (520) is provided parallel to the conveying belt (510) and the flow path on the conveying belt (510) is completely opened.

[0057] And, when the conveying unit (400) is moved upward and the conveying belt (510) is positioned at an angle between the conveying unit (400) and the sorting unit (600), as shown in FIGS. 7 and 8, the two support links (530) are set up in a tilted position toward the conveying unit (400) by the cover plate (520) which moves upward along with the conveying unit (400). At this time, as the cover plate (520) is provided in a position facing the conveying belt (510), the fall prevention plate (521) at the rear end of the cover plate (520) is provided in a position set up on the upper surface of the conveying belt (510) to block the flow path on the conveying belt (510) and prevent the crop from falling.

[0058] Meanwhile, the excavation unit (200) is configured to excavate underground crops within the ridge at the front of the base frame (110).

[0059] As shown in FIG. 11, this excavation unit (200) includes two side plates (210) installed to protrude forward from both sides of the lower part of the conveying unit (400) to be described later, an excavation plate (230) protruding downwardly between the two side plates (210) to directly excavate crops in the soil within the ridge, and a shaking sieve (240) provided so that the other end (rear end) rotates up and down around the first end (front end) of the two side plates (210) behind the excavation plate (230) to shake off soil attached to the excavated crops in the soil.

[0060] The two side plates (210) of the excavation unit (200) are each fixed to the two side plates (410) of the transfer unit (400) to be described later, and a circular blocking plate (220) is provided at the front end of the two side plates (210) of the excavation unit (200) to press down on stems or foreign substances that follow the crops when excavating the crops, thereby filtering them out so that they do not follow the crops. The blocking plate (220) may be fixed to or rotated on the two side plates (210).

[0061] And, the excavation plate (230) is provided with a slope such that its front end protrudes close to the ground between the two side plates (210) and its rear end is positioned higher than the front end. The angle of inclination of the excavation plate (230) is designed and provided to be the most suitable angle of inclination for digging up crops from the ground and excavating them as the excavation plate (230) moves forward.

[0062] Therefore, in the present invention, the height of the excavation plate (230) is adjusted according to the height of the ridge while maintaining the inclination of the excavation plate (230), and this will be explained in detail in the description of the transfer unit (400) to be described later.

[0063] Meanwhile, the shaking rod (240) at the rear of the excavation plate (230) as described above has its front end adjacent to the excavation plate (230) hinged to a hinge shaft (241) to be described later, which is fixed between the two side plates (210), and its rear end is provided to rotate up and down as a free end.

[0064] That is, as shown in FIGS. 11 to 13, the front end of the swing (240) is rotatably connected to a fixed hinge shaft (241) that penetrates both side plates (210), and the rear end is provided as a free end not constrained by both side plates (210).

[0065] Thus, the shaking stick (240) is configured so that the rear end rotates up and down with respect to the hinge axis (241) of the front end, and the rear end of the shaking stick (240) has openings formed at regular intervals so that the finger bar (431), which will be described later, can pass through.

[0066] Also, as shown in FIGS. 12 and 13, the rear end of the excavation plate (230) may be connected and fixed to the hinge shaft (241) separately from the shaking rod (240).

[0067] On both side plates (210) at the rear of the hinge shaft (241) as described above, a cam shaft (250) is provided, the ends of which are hinge-connected to both side plates (210) in a state in contact with the lower surface of the rocking club (240).

[0068] Thus, as the camshaft (250) rotates in place between the two side plates (210), the rear end of the shaking rod (240) is lifted upward and then lowered by its own weight, repeating the upward and downward rotational operation.

[0069] As shown in FIGS. 11 and 12, this camshaft (250) is connected to the rotation shaft (421) of the transfer unit (400) by a sprocket wheel and a connecting chain to be coupled.

[0070] Additionally, a rotating cam (251) may be fixedly provided on the cam shaft (250) in contact with the lower surface of the shaking club (240) to maximize the vertical rotational operation of the shaking club (240), and the rotating cam (251) is provided in a square shape so that when the rotating cam (251) rotates once, the shaking club (240) repeats a rotational operation in which it moves up and down significantly four times.

[0071] In addition, at each corner of the square-shaped rotating cam (251), a cam roller (252) is rotatably provided to roll in direct contact with the lower surface of the shaking club (240), thereby minimizing frictional resistance with the shaking club (240).

[0072] Thus, the supported shaking sieve (240) in contact with the cam roller (252) of the rotating cam (251) repeats the rotational operation of moving up and down four times during one rotation of the rotating cam (251), thereby repeatedly shaking the crops in the ground supplied onto the shaking sieve (240) up and down several times, so that the soil attached to the crops in the ground can be smoothly removed.

[0073] The crop supply unit (300) is configured to supply crops dug up from the ground at the top of the excavation unit (200) by transporting them to the rear shaking sieve (240).

[0074] As shown in FIG. 11, this crop supply unit (300) includes a hinge bracket (310) whose rear end is hinge-connected to each of the two side plates (210) of the excavation unit (200) and positioned to protrude above the excavation plate (230), a rotating shaft (330) which is hinge-connected to the front end of both hinge brackets (310) and is provided to rotate in place, and a supply blade (331) which is provided to protrude radially from the outer surface of the rotating shaft (330) and supplies the excavated underground crop placed on the excavation plate (230) to the rear shaking sieve (240).

[0075] The crop supply unit (300) configured in this manner is driven in synchronization with the transport unit (400), and the rotation axis (330) of the crop supply unit (300) is connected to the rotation axis (421) of the transport unit (400), which will be described later as in FIG. 13, by means of a transmission gear and a connecting chain to be synchronized.

[0076] The rotation axis (421) of the conveying unit (400) connected in this manner is rotated counterclockwise with respect to FIG. 13, and the rotation axis (330) of the crop supply unit (300) connected thereto is configured to rotate clockwise by changing direction through a transmission gear.

[0077] Also, since the supply blade (331) must rotate together with the rotation axis (330) and push the excavated underground crops toward the shaking sieve (240), it may be equipped with a hard rubber plate.

[0078] At this time, since the supply blade (331) may be damaged or broken due to the hard material of the supply blade (331) during contact with the crops in the ground, to prevent this, a plurality of cut sections (332) are formed at regular intervals in the lower part of the supply blade (331) by cutting the supply blade (331) in the longitudinal direction (up and down direction), thereby allowing the lower part of the supply blade (331) to be divided into a plurality of cut unit members.

[0079] Accordingly, when the lower end of the rotating supply blade (331) comes into contact with the upper surface of the excavated underground crop, the unit member in contact with the underground crop is folded and deformed independently without being constrained by the adjacent unit member by the cut portion (332), thereby preventing the denting of the underground crop, and when it comes into contact with the front surface of the excavated underground crop on the excavation plate (230), it is provided with rigidity to push and transport the underground crop with the rear shaking rod (240).

[0080] In addition, the crop supply unit (300) described above is provided to adjust the distance between the crop supply unit (300) and the excavation plate (230) according to the excavation depth. That is, when the excavation depth by the excavation plate (230) is deep, the crop supply unit (300) is moved upward to secure a wide space with the excavation plate (230), and when the excavation depth is shallow, the crop supply unit (300) is moved downward to secure a narrow space with the excavation plate (230).

[0081] To this end, a pivot cylinder (320) is provided between the two hinge brackets (310) of the crop supply unit (300) and the two side plates (410) of the transfer unit (400) to be described later, wherein the upper end of the pivot cylinder (320) is hinge-connected to the side plates (410) of the transfer unit (400), and a pivot rod (321) that moves in and out of the lower end of the pivot cylinder (320) is hinge-connected to the hinge bracket (310) of the crop supply unit (300).

[0082] Accordingly, as the rotating rod (321) moves in and out of the rotating cylinder (320), the crop supply unit (300) rotates up and down as shown in FIG. 14 with the rear end of the hinge bracket (310) as an axis, thereby adjusting the distance from the excavation plate (230).

[0083] The conveying unit (400) is provided with an inclined slope at the front end of the base frame (110), such that the lower part of the conveying unit (400) is positioned forward and the upper part of the conveying unit (400) is positioned backward, thereby configuring the conveying unit to transport excavated underground crops to the sorting unit (600) through the rear connecting unit (500).

[0084] As illustrated in FIGS. 2 and FIGS. 9 to 11, this conveying unit (400) includes two side plates (410) installed at an angle on the front end of the base frame (110), a chain (420) that is each wound around and rotated on the two side plates (410) via a rotation axis (421), a plurality of load bars (430) that are each connected to the two chains (420) and rotated together with the chains (420) in a transverse state, and a plurality of finger bars (431) that are provided to protrude outward from each load bar (430) and are arranged along the axial direction of the load bar (430) to lift excavated underground crops and convey them to the rear.

[0085] This transfer unit (400) is provided such that both sides and the rear are covered by both side plates (410) and the rear plate (411), respectively, and the front is provided to be exposed to the outside.

[0086] In addition, a rotation shaft (421) is rotatably installed on the upper and lower sides between the two side plates (410), and a chain (420) is wound on each side of the upper and lower rotation shafts (421) to rotate infinitely.

[0087] A hydraulic motor (422), which is a driving source, is connected to the lower rotating shaft (421) provided in this manner. As shown in FIG. 13, the hydraulic motor (422) is connected to one end of the lower rotating shaft (421) via a sprocket wheel and a connecting chain, and the rotating shaft (421) of the crop supply unit (300) is connected to one end of the rotating shaft (421) via a transmission gear and a connecting chain.

[0088] Accordingly, when the hydraulic motor (422) is operated, the rotation axis (421) of the transfer unit (400) and the rotation axis (330) of the crop supply unit (300) are synchronized and rotate simultaneously, but the rotation is configured to occur in opposite directions.

[0089] And, a camshaft (250) is connected to the other end of the rotating shaft (421) via a sprocket wheel and a connecting chain, so that the camshaft (250) is also synchronized with the rotating shaft (421) of the transfer unit (400) and the rotating shaft (330) of the crop supply unit (300) and rotates simultaneously when the hydraulic motor (422) is operated.

[0090] Meanwhile, between the two chains (420) of the two side plates (410), a plurality of load bars (430) are installed horizontally, that is, in a transverse direction, to connect the two chains (420), and the plurality of load bars (430) may be provided for each unit link of the chain (420).

[0091] Additionally, finger bars (431) that protrude outwardly are provided on the surface of the load bar (430) in a row along the axial direction of the load bar (430).

[0092] As shown in FIG. 1, these finger bars (431) are formed in an "L" shape including a protrusion that protrudes downward from the corresponding rod bar (430) and a seating portion that is bent forward and protrudes from the protrusion.

[0093] In addition, the seating portion of the finger bar (431) on which the excavated underground crop is placed may be provided with packing to prevent damage and breakage of the underground crop, and the spacing between the finger bars (431) is preferably provided at a minimum spacing to prevent the excavated underground crop from falling.

[0094] Accordingly, the finger bar (431) rotates along the chain (420) while tilted from the load bar (430) and penetrates the rear end of the shaking net (240) from bottom to top, lifting the crops placed on the shaking net (240) and transporting them to the sorting section (600) through the rear connecting section (500).

[0095] At this time, as the finger bar (431) reverses its rotational direction at the upper part of the conveying section (400), the crops in the ground that are settled on the finger bar (431) roll down and are discharged to the connecting section (500). During this process, foreign substances such as stems that are caught on the finger bar (431) and scooped up fall onto the inner surface of the rear plate (411) when the finger bar (431) reverses at the upper part of the conveying section (400) and are discharged through the inner lower part of the conveying section (400).

[0096] Meanwhile, the excavation plate (230) of the excavation unit (200) is fixed at a constant inclination on the lower sides of the conveying unit (400) as described above, and the excavation depth of the excavation plate (230) can be adjusted according to the height of the ridge while maintaining the inclination (angle of inclination) of the excavation plate (230).

[0097] To this end, the transfer unit (400) is configured with a lifting means for moving the transfer unit (400) up and down, and the lifting means includes a support frame (450) which is installed at an angle corresponding to the inclination of the transfer unit (400) on the front end of the base frame (110) as shown in FIGS. 9 and 10, and which is coupled to allow the transfer unit (400) to slide, and a lifting cylinder (460) which is provided on the support frame (450) and moves the transfer unit (400) up and down on the support frame (450).

[0098] The support frame (450) is provided as a right-angled triangular frame with its front surface formed as an inclined surface corresponding to the inclination of the transfer unit (400), and on both sides of its front surface, "C"-shaped guide rails (451) with open faces facing each other are installed side by side.

[0099] A rail plate (440) is fixedly installed on the outer surface of both side plates (410) of the transfer unit (400) corresponding to the guide rail (451), and a plurality of moving rollers (441) that move while rolling inside the guide rail (451) are rotatably provided on the rail plate (440).

[0100] And, the lifting cylinder (460) includes a lifting rod (461) that moves in and out at its upper end, wherein the lower end of the lifting cylinder (460) is hinge-connected to the guide rail (451) of the support frame (450), and the upper end of the lifting rod (461) is hinge-connected to the rail plate (440) of the transfer unit (400).

[0101] Thus, as the lifting rod (461) moves in and out of the lifting cylinder (460), the rail plate (440) of the transfer unit (400) slides along the guide rail (451) of the support frame (450), which is inclined at an angle corresponding to the inclination of the transfer unit (400). Accordingly, the transfer unit (400) moves up and down in an oblique direction along the guide rail (451) of the support frame (450), which is inclined at the same angle as the inclination of the transfer unit (400), while maintaining its inclination, thereby allowing the excavation depth of the excavation plate (230) to be easily adjusted while maintaining the inclination of the excavation plate (230).

[0102] The conveyor part (400) that moves up and down in this manner is linked with the connecting part (500) hinged to its rear end, thereby causing the conveyor belt (510) of the connecting part (500) to rotate up and down.

[0103] Meanwhile, the conveying unit (400) configured as described above is provided with a sorting unit (600) connected by a connecting unit (500), and the sorting unit (600) is configured so that a worker sorts the crops conveyed from the conveying unit (400) by size and separates and discharges them to the rear collection unit (700).

[0104] As shown in FIGS. 3 and FIGS. 4a, the sorting section (600) is equipped with two side plates (610), and a plurality of removal rollers (620) positioned in the front area between the two side plates (610) are provided to interlock with each other to remove foreign substances such as weeds or stems that have been transported along with crops.

[0105] And, on the side plates (610) on both sides of the removal roller (620), a stop pin (611) is provided so as to protrude, on which the guide bracket (512) of the conveyor belt (510) is seated and mounted.

[0106] Accordingly, the stop pin (611) is equipped with a hook portion (512a) and a catch portion (512b) of two guide brackets (512) that rotate while moving back and forth on the stop pin as the conveyor belt (510) rotates up and down, thereby preventing the accident of the connecting portion (500) being separated and detached from the sorting portion (600) in advance.

[0107] The operational relationship of the self-propelled harvester according to the present invention as described above is explained.

[0108] The potato harvester (100) of the present invention is capable of moving independently along a ridge by means of operation by a driver seated in the front driver's seat (120), and when moving forward, the digging unit (200) digs up underground crops planted in the ridge.

[0109] In this process, in the potato harvester (100) of the present invention, the operator can easily adjust the digging depth of the digging section (200) according to the height of the ridge using a hydraulic lever in the driver's seat (120).

[0110] That is, when the lifting cylinder (460) provided in the support frame (450) is operated to extend or retract the lifting rod (461) from the lifting cylinder (460), the rail plate (440) fixed to both side plates (410) of the hinge-connected transfer unit (400) moves upward or downward in a diagonal direction on the inclined guide rail (451) of the support frame (450).

[0111] At this time, since the guide rail (451) of the support frame (450) is installed to be inclined at an angle corresponding to the inclination of the transfer unit (400), the transfer unit (400) moves up and down along the guide rail (451) while maintaining its inclination to adjust its height, and the excavation unit (200), which moves up and down together with the transfer unit (400), also only adjusts its height while maintaining the inclination of the excavation plate (230).

[0112] Accordingly, by easily adjusting the excavation depth of the excavation plate (230) according to the height of the ridge, the excavation plate (230) excavates the ridge at a constant angle and depth, thereby preventing damage to crops underground during the excavation work and enabling smooth excavation work.

[0113] In addition, along with the height adjustment of the conveying unit (400) as described above, the angle of the connecting unit (500) connecting the conveying unit (400) and the sorting unit (600) is adjusted to match the height of the conveying unit (400).

[0114] That is, when the conveying unit (400) is moved downward and the conveying belt (510) is positioned horizontally between the conveying unit (400) and the sorting unit (600), as shown in FIGS. 5 and 6, both support links (530) are positioned vertically upward as much as possible, and the cover plate (520) is supported by the two support links (530) in this state so that it is lifted upward and rotated, thereby the drop prevention plate (521) is also provided parallel to the conveying belt (510) in a state where it is lifted upward and rotated, thereby completely opening the flow path on the conveying belt (510).

[0115] And, when the conveying unit (400) is moved upward and the conveying belt (510) is positioned at an angle between the conveying unit (400) and the sorting unit (600), as shown in FIGS. 7 and 8, the two support links (530) are set up in a tilted position toward the conveying unit (400) by the cover plate (520) which moves upward along with the conveying unit (400). At this time, as the cover plate (520) is provided facing the conveying belt (510), the fall prevention plate (521) at the rear end of the cover plate (520) is provided in a position set up on the upper surface of the conveying belt (510) to block the flow path on the conveying belt (510) and prevent the crop from falling.

[0116] Accordingly, due to the height difference between the raised conveying section (400) and the sorting section (600), the fall prevention plate (521) cushions the crop falling from the conveying section (400), thereby preventing damage or breakage of the crop as much as possible, and the crop placed on the conveying belt (510) smoothly passes through the fall prevention plate (521) by the operation of the conveying belt (510) and moves toward the sorting section (600).

[0117] Meanwhile, when the digging plate (230) moves forward with the digging depth adjusted as described above, the crops in the ground are naturally dug up by the inclination of the digging plate (230) and rise to the surface of the ground, and some of the crops in the ground that are dug up are supplied to the rear shaking plate (240) which moves forward by the inclination of the digging plate (230), and the remaining crops in the ground are forcibly transported to the shaking plate (240) by the operation of the crop supply unit (300).

[0118] The crop supply unit (300) is operated simultaneously with the conveying unit (400) and the shaking sieve (240) by the operation of the hydraulic motor (422), and the supply blade (331) of the crop supply unit (300) is rotated clockwise by its rotation axis (330) as shown in FIG. 13, thereby pushing the excavated crops from the ground onto the shaking sieve (240) at the rear to convey them.

[0119] And, since the front end of the shaking net (240) is hinged to the hinge shaft (241) of the rear end of the excavation plate (230) and the rear end is supported by contacting the rotating cam (251) of the cam shaft (250), the shaking net (240) repeatedly performs an up-and-down oscillating motion in which the rear end is lifted upward and then lowered by its own weight due to the rotation of the cam shaft (250), thereby repeatedly shaking the crops in the ground supplied onto the shaking net (240) several times, so that soil or foreign matter attached to the crops in the ground can be easily shaken off and removed.

[0120] Afterwards, the underground crop from which foreign substances have been removed is naturally positioned at the rear end of the shaking net (240) by the forward movement of the shaking net (240), and in this state, the finger bar (431), which is rotated repeatedly infinitely by the chain (420) of the conveying unit (400), passes through the rear end of the shaking net (240) from bottom to top, lifting the underground crop on the shaking net (240) and conveying it to the sorting unit (600) through the rear connecting unit (500).

[0121] Therefore, in the present invention, the excavation depth can be easily adjusted according to the height of the ridge while maintaining the inclination of the excavation plate (230), so that the excavation work can be carried out smoothly and quickly while preventing damage to the crops underground.

[0122] Although the present invention has been described in detail through specific embodiments, this is for the purpose of specifically explaining the invention, and the invention is not limited thereto. It is evident that modifications or improvements can be made by those skilled in the art within the technical scope of the present invention.

[0123] All simple variations or modifications of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be clarified by the appended claims. Explanation of the symbols

[0124] 100 : Potato Harvester 110 : Base Frame 120 : Driver's seat 121 : Display panel 122 : Side mirror 200 : Excavation unit 210 : Side plate 220 : Block plate 230 : Digging plate 240 : Shaking net 241 : Hinge shaft 250 : Cam shaft 251 : Rotary cam 252 : Cam roller 300 : Crop supply unit 310 : Hinge bracket 320: Rotating cylinder 321: Rotating rod 330 : Rotating axis 331 : Supply blade 332 : Incision section 400 : Transfer section 410 : Side panel 411 : Back panel 420 : Chain 421 : Rotating shaft 422 : Hydraulic motor 430 : Load bar 431 : Finger bar 440 : Rail plate 441: Moving roller 450: Support frame 451 : Guide rail 460 : Lifting cylinder 461 : Lifting rod 470 : Height adjuster 500 : Connection part 510 : Conveyor belt 510a : Hinge part 511 : Side panel 512: Guide bracket 512a: Hook part 512b : Stopper 520 : Cover plate 520a, 520b: Hinge part 521: Drop prevention plate 521a : Incision 530 : Support link 530a : Hinge section 600 : Sorting section 610 : Side plate 611 : Stop pin 620 : Removal roller 700 : Collection unit

Claims

Claim 1 A self-propelled harvester comprising a digging unit for digging up crops within a ridge, a conveying unit for conveying crops dug up by the digging unit to the rear, and a sorting unit for sorting crops conveyed and discharged from the conveying unit, wherein the digging unit and the conveying unit are configured to move up and down while maintaining an inclined angle by means of a lifting mechanism on a base frame, and a conveying belt is provided that rotates while connecting the conveying unit and the sorting unit, and maintains the connection between the conveying unit and the sorting unit by adjusting the angle between the conveying unit and the sorting unit according to the height of the vertically moving conveying unit, wherein the front end of the conveying belt is provided hinge-connected to the conveying unit and the rear end is provided with a guide bracket mounted on the sorting unit and capable of moving and rotating within the sorting unit, so that as the conveying unit moves up and down, the front end of the conveying belt rotates up and down around the guide bracket at the rear as an axis to adjust the angle of the conveying belt, wherein a bent hook portion is formed on the guide bracket of the conveying belt and the guide bracket is movably mounted on the sorting unit, and the hook portion of the moving guide bracket is engaged to prevent the conveying belt from detaching. Self-propelled harvester equipped with a stop pin. Claim 2 delete Claim 3 delete Claim 4 A self-propelled harvester according to claim 1, wherein the conveyor belt is equipped with a fall prevention plate to prevent crops being transported from the conveying section to the sorting section. Claim 5 A self-propelled harvester according to claim 4, wherein the fall prevention plate opens the flow path of the conveyor belt when the conveyor part is moved downward and the conveyor belt is maintained horizontally, and blocks the flow path of the conveyor belt when the conveyor part is moved upward and the conveyor belt is angle-adjusted to prevent crops from falling. Claim 6 A self-propelled harvester according to claim 4 or claim 5, wherein a cover plate is provided with one end hinge-connected to a conveying part on the upper side of the conveying belt and a fall prevention plate is fixed to the other end, and a support link is provided with both ends hinge-connected to the cover plate and the conveying belt, respectively, so that when the conveying part moves up and down, the conveying belt, the support link, and the cover plate rotate in conjunction to rotate the fall prevention plate up and down. Claim 7 A self-propelled harvester according to claim 1, comprising: a support frame fixedly provided on a base frame and coupled so that a conveying part slides up and down while maintaining an inclined angle; and a lifting cylinder having both ends hinge-connected to the support frame and the conveying part, respectively, to move the conveying part up and down on the support frame. Claim 8 A self-propelled harvester according to claim 1, comprising: a digging plate provided to protrude downward forward from the conveying part for digging up underground crops; and a shaking sieve provided at the rear of the digging plate so that the other end rotates up and down around one end as an axis for shaking off soil from the dug-up underground crops. Claim 9 A self-propelled harvester according to claim 8, wherein the digging part is equipped with a camshaft that is rotated in place at the lower part of the shaking net and lifts the shaking net upward. Claim 10 A self-propelled harvester according to claim 8, wherein the digging unit is provided with a crop supply unit that supplies underground crops dug up from the upper part of the digging plate to a shaking net, and the crop supply unit comprises: a hinge bracket provided by hinge-connecting to the upper part of the digging plate; a rotating shaft provided to rotate in place on the hinge bracket; and a supply blade provided to protrude radially from the outer circumference of the rotating shaft to transport and supply the dug-up underground crops to the shaking net side. Claim 11 A self-propelled harvester according to claim 1, comprising: two side plates installed at an angle on a base frame; a chain wound around each of the two side plates and rotatably provided; a plurality of rod bars with both ends connected to each of the two chains and rotating together with the chains; and a plurality of finger bars protruding outward from each rod bar and arranged along the axial direction of the rod bar to lift excavated underground crops and transport them to the rear.

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