Hydraulic drive device for self-propelled onion harvester

Abstract

The present invention relates to a hydraulic drive device for a self-propelled onion harvester that automatically supplies onions excavated from the ground by transporting them to a transport unit, wherein both the driving unit and the working unit are operated by hydraulics, thereby making operation easy and allowing even the elderly and infirm to control it easily. A drive device for a self-propelled onion harvester comprising: a conveying unit for conveying onions dug up above the ground to the rear; a main body frame having the conveying unit installed at the front; a driving unit that moves in the front-rear direction and is connected to the main body frame at the top; a collecting unit provided at the rear of the conveying unit for collecting onions conveyed from the conveying unit; and a supply unit having a supply plate that rotates at the front of the conveying unit and pushes onions on the ground toward the conveying unit for conveying, wherein the device comprises: a hydraulic motor connected to an engine and operated to supply oil from a hydraulic tank to a working unit and a driving unit, each consisting of a conveying unit, a collecting unit, and a supply unit; an oil cooler for cooling oil discharged from the hydraulic tank; and a plurality of hydraulic control valves connected to the hydraulic tank to regulate the path of oil supplied to the working unit and the driving unit.

Description

Technology Field

[0001] The present invention relates to a hydraulic drive device for a self-propelled onion harvester, and more specifically, to a hydraulic drive device for a self-propelled onion harvester that automatically supplies onions excavated from the ground to a conveying unit, wherein both the driving unit and the working unit are operated by hydraulics, thereby making operation easy and allowing even the elderly and infirm to easily control it. Background Technology

[0003] Onions are a representative bulbous crop known for their pungent smell and strong spicy flavor, which helps eliminate odors from meat and fish and promotes digestion. Additionally, since applying heat—such as boiling or roasting—removes the spiciness and brings out sweetness and aroma, they are used as an ingredient in various dishes.

[0005] These onions are sown in seedbeds, and the onion seedlings grown in the seedbeds are transplanted to the field after a certain period of time. After another certain period in the field, the tissue of the leaf sheath weakens, causing them to fall over on their own.

[0006] In this way, nutrients from the leaves and stems of the fallen onion descend to the bulb, helping it to enlarge rapidly. When the bulb has enlarged sufficiently, it is harvested, and during the harvesting process, the stems are cut off and only the bulbs are harvested.

[0008] Although various onion harvesters have been developed to automatically harvest such onions, most of them operate the driving unit and the working unit by separate drive sources, and in particular, the driving unit is mechanically driven, which poses a problem in that a significant amount of force is required for gear shifting.

[0010] Meanwhile, Registered Patent No. 10-0601585 proposes and discloses an onion harvester capable of significantly reducing working time and manpower by allowing only the picking of onions, comprising: a sorting unit in which a sorting brush is installed in a row on the outer circumference of a rotating member to sort onion leaves in one direction; a supporting unit in which a plurality of rotating members are installed facing each other at the rear end of the sorting unit to rotate in mutually opposite directions and a supporting brush is installed in a row on the outer circumference of the rotating member to raise onion leaves; a cutting blade installed at the bottom of the supporting unit to cut onion leaves; an excavation unit installed at the rear of the supporting unit and having an excavation blade formed at the bottom for excavating the ground; and a power transmission unit that transmits power to the sorting unit, the supporting unit, the cutting blade, and the excavation unit.

[0011] In Public Patent No. 10-2019-0103794, a configuration comprising a primary digging unit installed at the front of a vehicle body for digging up onions planted in a field, a secondary collection conveyor unit for collecting onions dug up by the primary digging unit and transporting them to the upper part of the vehicle body, a tertiary transport conveyor unit for horizontally transporting onions transported to the upper part of the vehicle body by the secondary collection conveyor unit to the rear of the vehicle body, a stem cutting unit installed in the middle of the tertiary transport conveyor unit for cutting the leaf stems of the onions being transported, a collection unit installed at the rear of the vehicle body for collecting onions with cut stems in a collection bag while passing through the stem cutting unit, and a blower for blowing the leaf stems upward, wherein a separation member for separating the onion and the vinyl is installed between the onion and the vinyl on the upper side of the secondary collection conveyor unit, thereby interfering with the leaf stem of the onion inserted into the perforation of the vinyl during the process of separation by the onion transported by the tertiary transport conveyor unit and the wind discharged upward from the blower, the A self-propelled onion harvester is proposed and disclosed, configured to extract leaf stems from a perforation section, and capable of significantly reducing the labor and time required for onion harvesting by mechanically removing even the plastic film.

[0012] Registered Patent No. 10-0824502 ​​proposes and discloses a self-propelled onion harvester that includes a first digging unit installed at the front of a vehicle body capable of driving by its own power to dig up onions planted in a field, a second collection conveyor unit that collects onions dug up by the first digging unit and transports them to the upper part of the vehicle body, a third transport conveyor unit that horizontally transports onions transported to the upper part of the vehicle body by the second collection conveyor unit to the rear of the vehicle body, a stem cutting unit installed in the middle of the third transport conveyor unit to cut the stems of onions being transported, and a collection unit installed at the rear of the vehicle body to collect onions with their stems cut while passing through the stem cutting unit into a collection bag, thereby eliminating the need for the cumbersome task of cutting the leaves and stems in advance, and thus enabling the reduction of labor costs and the shortening of harvest time during onion harvesting. Prior art literature

[0014] Registered Patent Publication No. 10-0601585 Published Patent Publication No. 10-2019-0103794 Registered Patent Publication No. 10-0824502 The problem to be solved

[0015] Accordingly, the present invention is designed to resolve the aforementioned conventional problems and to take them into account. Its purpose is to provide a hydraulic drive device for a self-propelled onion harvester that automatically supplies onions dug up from the ground to a conveying unit, wherein both the driving unit and the working unit are operated by hydraulics, making operation easy and allowing even the elderly and infirm to control it easily.

[0016] In addition, another purpose is to provide a hydraulic drive system for a self-propelled onion harvester that enables safe driving by preventing rapid acceleration. means of solving the problem

[0018] The hydraulic drive device of the self-propelled onion harvester according to the present invention for achieving the above objective comprises: a conveying unit for conveying onions dug up above the ground to the rear; a main body frame having the conveying unit installed at the front; a driving unit that moves in the front-rear direction and has the main body frame connected to the upper part; a collecting unit provided at the rear of the conveying unit for collecting onions conveyed from the conveying unit; and a supply unit having a supply plate that rotates at the front of the conveying unit and pushes onions on the ground toward the conveying unit. The drive device is characterized by comprising: a hydraulic motor connected to an engine and operated to supply oil from a hydraulic tank to a working unit and a driving unit, each consisting of a conveying unit, a collecting unit, and a supply unit; an oil cooler for cooling oil discharged from the hydraulic tank; and a plurality of hydraulic control valves connected to the hydraulic tank to regulate the path of oil supplied to the working unit and the driving unit.

[0019] Here, the hydraulic control valve is adjusted to control the path of oil supplied to the working part and the driving part, and may further include an operating part installed on the main body frame.

[0020] Here, the control unit can control the work unit and the driving unit using a joystick and buttons.

[0021] Here, the hydraulic control valve may include two first valves controlled by a solenoid that supply oil to two hydraulic motors for driving, each provided on the left and right sides of the driving unit; a second valve controlled by a solenoid that supplies oil to a first hydraulic motor that drives the transfer unit and the supply unit; and a third valve controlled by a solenoid that supplies oil to a second hydraulic motor that drives the collection unit.

[0022] Here, a steering valve that supplies oil to a pair of steering parts to enable the vehicle body to rotate may be further included.

[0023] Here, a speed control circuit may be provided between the first valve and the hydraulic motor for driving. Effects of the invention

[0025] The hydraulic drive device of the self-propelled onion harvester according to the present invention is equipped in a self-propelled onion harvester that automatically supplies onions excavated from the ground to the conveying unit, and operates the driving unit and the working unit through hydraulics, thereby enabling easy operation using a joystick and buttons and achieving a useful effect that even the elderly and infirm can easily control.

[0026] According to the present invention, a speed control circuit is provided between a first valve that controls the oil supply to a hydraulic motor for driving and a hydraulic motor for driving, thereby preventing rapid acceleration by preventing oil from being rapidly supplied to the hydraulic motor for driving, and thus achieving a useful effect of improving safety.

[0027] According to the present invention, the supply plate of the supply unit rotates while maintaining a state perpendicular to the ground at the front of the harvester, and the onions dug up from the ground are transported to the rear conveying unit for automatic supply, so that the dug-up onions can be collected with minimal damage and breakage, and the useful effect of improving the efficiency of onion collection can be achieved. Brief explanation of the drawing

[0029] FIG. 1 is a perspective view showing a self-propelled onion harvester equipped with a hydraulic drive device of the present invention. FIG. 2 is a perspective view showing a hydraulic drive unit of a self-propelled onion harvester according to the present invention. FIG. 3 is a rear perspective view showing the hydraulic drive unit of a self-propelled onion harvester according to the present invention. FIG. 4 is a perspective view showing the operating part of the hydraulic drive unit of a self-propelled onion harvester according to the invention. FIG. 5 is a perspective view showing the working part being connected to the hydraulic drive unit of a self-propelled onion harvester according to the invention. Figure 6 is a schematic diagram showing the hydraulic circuit of the hydraulic drive unit of a self-propelled onion harvester according to the invention. FIGS. 7 to 11 are drawings for explaining the operating state of the supply unit in a self-propelled onion harvester equipped with a hydraulic drive device according to the present invention. Specific details for implementing the invention

[0030] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0031] 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.

[0033] Figure 1 of the attached drawings is a drawing showing a self-propelled onion harvester equipped with a hydraulic drive device of the present invention, Figures 2 to 6 are drawings for explaining the hydraulic drive device of the self-propelled onion harvester according to the present invention, and Figures 7 to 11 are drawings for explaining the operating state of the supply unit in the self-propelled onion harvester equipped with a hydraulic drive device according to the present invention.

[0035] As shown in FIG. 1, the hydraulic drive device of a self-propelled onion harvester according to an embodiment of the present invention is provided in a self-propelled onion harvester comprising a main body frame (10), a driving unit (20), a conveying unit (30), a collecting unit (40), and a supply unit (50), and drives the driving unit (20) of the self-propelled onion harvester using hydraulic pressure, and also drives the conveying unit (20), the supply unit (50), and the collecting unit (40).

[0037] As shown in FIGS. 2 to 6, this hydraulic drive unit (60) is configured to include a hydraulic motor (62) that is connected to and operated by an engine (61) and supplies oil from a hydraulic tank (64) to a work unit and a driving unit, each consisting of a transfer unit (30), a collection unit (40), and a supply unit (50); an oil cooler (63) that cools the oil discharged from the hydraulic tank (64); and a plurality of hydraulic control valves (65) that are connected to the hydraulic tank (64) and control the path of the oil supplied to the work unit and the driving unit (20).

[0038] In addition, it further includes an operating unit (70) installed on the main body frame (10) that controls the path of oil supplied to the working unit and the driving unit (20) by adjusting the hydraulic control valve (65). At this time, the operating unit (70) controls the working unit and the driving unit (20) using a joystick (71) and a button (72) as shown in FIG. 4.

[0040] Additionally, as shown in FIG. 6, the hydraulic control valve (65) comprises two first valves (65a) controlled by a solenoid that supply oil to two hydraulic motors (25) for driving, each provided on the left and right sides of the driving unit (20), a second valve (65b) controlled by a solenoid that supplies oil to a first hydraulic motor (35) that drives the transfer unit (30) and the supply unit (50), and a third valve (65c) controlled by a solenoid that supplies oil to a second hydraulic motor (45) that drives the collection unit.

[0042] In addition, it further includes a steering valve (66) that supplies oil to a pair of steering parts (27) to rotate the vehicle body, and a speed control circuit (26) is provided to control the oil supply speed between the first valve (65a) and the hydraulic motor (25) for driving.

[0044] Here, the main body frame (10) is formed by connecting multiple frames, with the transfer unit (30) installed at an angle at the front. The driving unit (20) moves in the forward and backward directions and is connected to the main body frame (10) at the top and operated by hydraulics.

[0046] The conveying unit (30) conveys onions dug up above the ground to the rear along an inclined surface, and conveys the onions by rotating a belt that is positioned at an angle and operated by hydraulics.

[0048] And the collection unit (40) is provided at an angle behind the transport unit (30) to collect onions transported from the transport unit (30). In addition, the collection unit (40) is also configured to be operated by hydraulics.

[0049] The supply unit (50) is provided in front of the transfer unit (30) and rotates to push and transfer onions on the ground toward the transfer unit (20). The supply unit (50) operates together with the transfer unit (30) by hydraulic pressure and is equipped with a rotating supply plate (25).

[0051] Meanwhile, as shown in FIG. 7, the supply unit (50) comprises a pair of support frames (51) protruding forward from both sides of the transfer unit (30), a main rotating plate (53) which is rotatably provided between the two support frames (51) and is fixed to each side of a rotating shaft (52) and rotates integrally with the rotating shaft (52), a connecting shaft (54) which has both ends rotatably connected to both main rotating plates (53) and is provided at regular intervals along the circumferential direction of the main rotating plate (52), and on its outer surface, a supply plate (55) is fixed and positioned perpendicular to the ground, an auxiliary rotating plate (56) which is eccentrically connected to one main rotating plate (53) and is rotatably supported by the one-side support frame (51) adjacent thereto, and a driving gear (57) which has a rotating shaft (52) that penetrates the auxiliary rotating plate (56) at the center and is rotatably provided on the one-side support frame (51).

[0052] Accordingly, as the drive gear (57) connected to the transfer unit (30) rotates, the main rotating plate (53) and the auxiliary rotating plate (56) rotate in place, and the supply plate (55) of the connecting shaft (54) rotates in a state perpendicular to the ground.

[0054] The support frame (51) is a hollow frame provided on each side of the supply unit (50), and inside it, a drive gear (57) for rotating the rotation shaft (52) is connected to the transfer unit (30) and a power transmission means (not shown) for rotating the drive gear (57) is installed.

[0055] At this time, the drive gear (57) may be provided on the support frame (51) and fixed to both ends of the rotating shaft (52) to be described later, but the drive gear (57) may be provided on one side of the support frame (51) and fixed to one end of the rotating shaft (52) by means of a key connection or the like.

[0057] In addition, among the two support frames (51) described above, one support frame (51) adjacent to the auxiliary rotating plate (56) to be described later is provided with a fixed support plate (51b) in the shape of an arc, and a plurality of support pins (51a) are fixedly provided on the support plate (51b) so as to protrude toward the auxiliary rotating plate (56) and be in contact with the center hole (56b) to be described later.

[0059] And the auxiliary rotating plate (56) has a center hole (56c) formed in the center so that a rotating shaft (52), which is coupled and fixed to the drive gear (57), passes through it in a state of internal contact, and a support pin (51a) provided on one side support frame (51) is internally contacted in the center hole (56b) so that the auxiliary rotating plate (56) rotates in place (rotation).

[0061] Additionally, the main rotating plate (53) is provided with a cross-shaped main arm (53a) that protrudes outward, and a connecting shaft (54) is rotatably connected to the main arms (53a) facing each other. And the auxiliary rotating plate (56) is provided with an auxiliary arm (56a) that protrudes to correspond to the main arm (53a).

[0062] At this time, a connecting block (53b) (56b) is provided on each of the auxiliary arm (56a) and the adjacent main arm (53a), and the connecting blocks (53b) (56b) on both sides are connected by a connecting link (58) so that the auxiliary rotating plate (56) is eccentrically provided on the main rotating plate (53).

[0063] At this time, the connecting block (53b)(56b) to which the connecting link (58) is connected is composed of a lower member (53b1)(56b1) and a cover member (53b2)(56b2) connected to each arm.

[0065] As shown in FIG. 7, the driving plate (55) comprises a main driving plate (55a) having a plurality of cut grooves (55c) located in front of a mounting base (54') connected to the lower part of a connecting shaft (54), an auxiliary driving plate (55b) installed at the rear of the mounting base (54') with its lower end formed to be inclined outward, and a protective plate (55d) located on the upper side of the main driving plate (55a) to protect the main driving plate (55a) from a fastening means.

[0066] .

[0067] And, the connecting link (58) is provided with a fixing part (58a) at one end that is fixed to a connecting shaft (52) that passes through the connecting block (53b) of the main arm (53a), and a hinge part (58b) at the other end that is hinge-coupled to the connecting block (56b) of the auxiliary arm (56a).

[0069] The driving unit and the working unit using the hydraulic drive unit of the self-propelled onion harvester of the present invention configured as described above will be explained as follows.

[0070] When the engine (61) of the onion harvester is operated, the hydraulic motor (62) connected to the engine (61) is operated, and oil from the hydraulic tank (64) is supplied to the driving unit (20) and the working unit through the hydraulic control valve (65). At this time, the direction of oil supply is controlled using the joystick (71) and button (72) provided in the control unit (70).

[0072] Accordingly, oil from the hydraulic tank (64) is supplied to the hydraulic motors (25) on both sides of the driving unit (20) through the first valve (65a), causing the driving unit (20) to move in the forward and backward directions, oil from the hydraulic tank (64) is supplied to the first hydraulic motor (35) of the transfer unit (30) through the second valve (65b), causing the transfer unit (30) and the operating unit (50) to be driven, and oil from the hydraulic tank (64) is supplied to the second hydraulic motor of the collection unit (40) through the third valve (65c), causing the collection unit to operate.

[0073] Then, the oil from the hydraulic tank (64) is supplied to the steering unit (27) through the steering valve (66), causing the vehicle body to rotate. At this time, the oil cooler (63) cools the oil from the hydraulic tank (64) to prevent the oil from deteriorating.

[0074] Accordingly, onions on the ground are transported by the transport unit (30) and the supply unit (50), then collected by the collection unit (40) and stored in a ton bag.

[0076] Meanwhile, the application of the supply unit (50) provided in the transfer unit (30) is explained as follows with reference to FIGS. 8 to 11.

[0077] When oil is supplied to the transfer unit (30) and the first hydraulic motor (35) is operated, the transfer unit (30) is driven by the first hydraulic motor (35), and at the same time, the drive gear (57) connected to the first hydraulic motor (35) by a belt or the like rotates on one side support frame (51).

[0078] And the fixed rotating shaft (52) coupled with the drive gear (51) is also rotated between the support frame (51).

[0080] As the rotation axis (52) rotates, the main rotating plate (53) coupled and fixed thereto rotates in place around the rotation axis (52) as shown in FIGS. 5 to 8, and the main arm (53a) protruding from the main rotating plate (53) also rotates around the rotation axis (52).

[0082] At the same time, the connecting shaft (54) connecting the two main arms (53a) between the two main rotating plates (53) facing each other is constrained to the main arm (53a) and rotates, i.e., revolves around the rotation axis (52); however, since it is coupled to the main arm (53) via a bearing to enable relative rotation, it does not rotate on the rotating main arm (53a).

[0084] And, the auxiliary rotating plate (256), having an auxiliary arm (56a) connected to the main arm (53a) of the main rotating plate (53) by a connecting link (58), is eccentrically positioned on one side of the main rotating plate (53) by the length of the connecting link (58), and rotates in place around the center hole (56c) by means of a rotation axis (52) in contact with the center hole (56c) and a plurality of support pins (52a0).

[0086] Accordingly, the supply plate (55) provided on the lower side of each connecting shaft (54) rotates (revolves) in a position perpendicular to the ground at any position even when the main rotating plate (53) is rotated by the connecting shaft (54), thereby increasing the contact time with the ground from the moment it comes into contact with the ground until the moment it is separated from it. And since the contact force with the ground acts for a longer period due to the increased contact time, the traction force is increased, so the onion excavated above the ground can be smoothly pulled and transported to the rear transport unit (30) while preventing damage to the onion, and the onion collection efficiency can be improved.

[0088] So far, we have described harvesting onions using a hydraulic-driven self-propelled onion harvester, but it can also be used to harvest potatoes or sweet potatoes dug up from the ground.

[0090] The embodiments described above are merely illustrative of preferred embodiments of the present invention and are not strictly limited to such embodiments. Various modifications and variations may be made by those skilled in the art within the technical spirit and scope of the claims of the present invention, and such modifications and variations fall within the technical scope of the present invention. Explanation of the symbols

[0092] 10 : Main body frame 20 : Driving unit 25: Hydraulic motor for driving 26: Steering unit 30 : Transfer unit 35 : First hydraulic motor 40 : Storage compartment 45 : Second hydraulic motor 50 : Supply unit 51 : Support frame 51a: Support plate 52b: Support pin 52 : Rotation axis 53 ; Main turntable 53a : Main arm 53b : Connecting block 54 : Connecting shaft 54' : Mounting base 55 : Drive plate 55a : Main drive plate 55b : Auxiliary drive plate 55c : Incision groove 55d : Guard 56 : Auxiliary turntable 56a : Auxiliary arm 56b : Connecting block 56c : Center hole 57 : Drive gear 58 : Connecting link 58a : Fixed part 58b : Hinge part 60 : Hydraulic drive part 61 : Engine 62 : Hydraulic pump 63 : Oil cooler 64 : Hydraulic tank 65: Hydraulic control valve 65a: First valve 65b: 2nd valve 65c: 3rd valve 66 : Steering valve 70 : Control unit 71 : Joystick 72 : Button

Claims

Claim 1 A drive device for a self-propelled onion harvester comprising: a conveying unit for conveying onions dug up above the ground to the rear; a main body frame having the conveying unit installed at the front; a driving unit that moves in the front-rear direction and has the main body frame connected to its upper portion; a collecting unit provided at the rear of the conveying unit for collecting onions conveyed from the conveying unit; and a supply unit having a supply plate that rotates at the front of the conveying unit and pushes onions on the ground toward the conveying unit for conveying, wherein the drive device comprises: a hydraulic motor connected to an engine and operated to supply oil from a hydraulic tank to a working unit and a driving unit, each comprising a conveying unit, a collecting unit, and a supply unit; and an oil cooler for cooling oil discharged from a hydraulic tank. A hydraulic drive device for a self-propelled onion harvester, comprising a plurality of hydraulic control valves connected to a hydraulic tank to regulate the path of oil supplied to a working unit and a driving unit; wherein the hydraulic control valves each comprise two first valves controlled by a solenoid that supply oil to two driving hydraulic motors provided on the left and right sides of the driving unit, a second valve controlled by a solenoid that supplies oil to a first hydraulic motor that drives a conveying unit and a supply unit, and a third valve controlled by a solenoid that supplies oil to a second hydraulic motor that drives a collecting unit. Claim 2 A hydraulic drive device for a self-propelled onion harvester according to claim 1, further comprising an operating unit installed on the main body frame to control the path of oil supplied to the working unit and the driving unit by adjusting a hydraulic control valve. Claim 3 A hydraulic drive device for a self-propelled onion harvester according to claim 2, characterized in that the operating unit controls the working unit and the driving unit using a joystick and a button. Claim 4 delete Claim 5 A hydraulic drive device for a self-propelled onion harvester according to claim 1, characterized in that a speed control circuit is provided between the first valve and the hydraulic motor for driving. Claim 6 A hydraulic drive device for a self-propelled onion harvester according to claim 1, further comprising a steering valve that supplies oil to a pair of steering parts to rotate the vehicle body.

Images