A tobacco leaf assisted picking device

Abstract

This invention relates to a tobacco leaf auxiliary harvesting device, comprising two base plates, left and right, each base plate having two vertical tubes fixed to it, and two horizontal tubes mounted on the upper side of each vertical tube. A swing arm is hinged to the inner end of each base plate, and a slider is mounted on the inner end of each swing arm. The lower end of the slider is connected to the swing arm via a tension spring, and a U-shaped cutter is fixed to the inner end of the slider. Horizontally placed handrails are mounted on the left ends of the two left vertical tubes, and a connecting rod is fixed between each handrail and one of the two vertical tubes. A sliding rod capable of horizontal left-right movement is mounted on the connecting rod. When the two sliding rods move left and right, they respectively drive the sliders on the left and right sides to move up and down. This invention allows manual operation of the sliding rods on the front and rear sides, enabling the cutter's height to be adjusted at any time according to the user's wishes. This allows for the cutting of mature tobacco leaves at different heights, significantly improving the cutting quality compared to existing electronically controlled cutting methods.

Description

Technical Field

[0001] This invention relates to the field of tobacco cultivation, specifically to a tobacco leaf harvesting auxiliary device. Background Technology

[0002] When harvesting tobacco leaves, the maturity of leaves varies at different heights, with leaves closer to the top being less mature. Therefore, to ensure harvesting quality, mature leaves at the bottom are usually harvested first, while the leaves at the top are harvested later as they mature. Since manual harvesting is costly, time-consuming, and labor-intensive, existing tobacco harvesting equipment is often used to assist in the process. For example, the scissor-type layered tobacco harvesting mechanism disclosed in CN116235697A uses circuitry to control the lifting and lowering of the scissor mechanism to cut the tobacco leaves with a ring-shaped blade. However, currently... Existing tobacco leaf harvesting equipment has the following drawbacks: 1. The circuit control system has high operating costs and a high barrier to entry, making it difficult to deploy in large-scale production; 2. The scissor mechanism itself has a certain height, which can easily obstruct tobacco leaves during movement, causing them to break, and the lowest cutting point is too high, making it difficult to effectively cut the bottom layer of tobacco leaves; 3. Due to the different growth stages of each tobacco seedling, the height of mature tobacco leaves also varies, and existing tobacco leaf harvesting equipment cannot adaptively adjust the cutting height; 4. The cut tobacco leaves are scattered on the ground, requiring subsequent collection by workers, which is time-consuming and labor-intensive. Summary of the Invention

[0003] In view of the above situation and to overcome the defects of the prior art, the present invention adopts a tobacco leaf auxiliary harvesting device, which solves the problems of high cost and inflexible control of cutting height in the prior art tobacco leaf harvesting equipment.

[0004] The technical solution is a tobacco leaf auxiliary harvesting device, comprising two horizontally placed base plates, spaced apart. Each base plate has two vertical tubes fixed in front and behind, and two horizontal tubes on the upper side of the vertical tubes, which are respectively fixedly connected to the vertical tubes at the left and right ends of the corresponding sides. Each base plate has a swing rod hinged to its inner end, which can swing left and right around the hinge axis. Each swing rod has a slider that can slide up and down on its inner end. The lower end of the slider is connected to the swing rod by a tension spring, which keeps the slider at the lowest end of the swing rod. A U-shaped cutter is fixed to the inner end of the slider, and the U-shaped cutter has sharpened edges on its upper and lower sides. When the two swing rods swing upward to a vertical position, the ends of the two U-shaped cutters can fit together to form a ring. The left ends of the two vertical tubes on the left side are equipped with horizontally placed handrails, and a connecting rod is fixed between the handrails and the two vertical tubes. The connecting rods are equipped with sliding rods that can move horizontally left and right. When the front and rear sliding rods move left and right, they can drive the sliders on the left and right sides to move up and down respectively.

[0005] Preferably, each of the U-shaped cutters has a horizontally placed guide rod fixed at both ends. Multiple inclined rods are evenly distributed on the guide rods from front to back. The inclined rods are set perpendicular to the guide rods and their outer ends are inclined downwards. A clearance groove is opened on the base plate at the position corresponding to each inclined rod.

[0006] Preferably, each of the aforementioned rocker arms has a groove on its inner end face, the slider is placed in the groove and can slide up and down, and the rocker arm has a through hole on the outside of the groove along its length. Each base plate has a first winding wheel and a second winding wheel rotatably connected to its lower end face, and the first winding wheel and the second winding wheel can rotate synchronously. A first pull rope is fixedly connected to the upper end of each slider, and the other end of the first pull rope passes through the through hole from top to bottom and is fixed to the first winding wheel. When the first winding wheel rotates, the first pull rope can be wound around its outer side. A second pull rope is fixedly connected to each rocker arm. The second pull rope on the front side passes down through the front vertical tube to the lower end face of the left base and is fixedly connected to the second winding wheel on the left side. The second pull rope on the rear side passes up through the rear vertical tube, passes through the horizontal tube and the right rear vertical tube in sequence to the lower end face of the right base and is fixedly connected to the second winding wheel on the right side. When the second winding wheel rotates, the second pull rope can be wound around its outer side.

[0007] Preferably, gears are fixed to the outer edges of the first and second winding reels, respectively, and the gears on corresponding sides mesh with each other. The outer diameter of the gear on the first winding reel is smaller than the diameter of the gear on the second winding reel.

[0008] Preferably, the two base plates are fixed with baffles on their inner sides. The baffles can prevent the swing rod from swinging inward from the vertical direction. The base plate has a clearance opening on the lower side of the swing rod, and the first pull rope can pass through the clearance opening to the lower side of the base.

[0009] Preferably, vertical plates are fixed to the outer sides of the two base plates respectively. A through groove is opened in the middle of the vertical plate, which passes through the left and right end faces. The swing rod can be placed in the through groove when it swings outward. Pin holes are provided on the front and rear end faces of the through groove respectively. A pin that can move back and forth is provided in the pin hole. A stop bar that can rotate in the horizontal direction is provided on the lower side of the two baffles respectively. When there is no external force, the free end of the stop bar always faces inward. When the stop bar swings back and forth, it can drive the pin to move inward to the inside of the pin hole.

[0010] Preferably, the stop bar is an L-shaped bar with a vertical shaft. Each stop bar has two third pull ropes fixed to its vertical shaft. The third pull ropes pass through the inner end of the base plate to the front and rear sides of the base plate, and pass through the vertical plate to the pin hole and are fixedly connected to the pin. A compression spring is provided between the pin and the pin hole.

[0011] Preferably, the connecting rod has a through groove extending through the front and rear end faces, and the sliding rod is placed in the through groove and can slide left and right along the through groove.

[0012] Preferably, the outer side of the base plate is provided with two sets of rollers, one in the front and one in the rear.

[0013] Preferably, a torsion spring is provided at the hinge position of the rocker arm, and the torsion spring torque is much smaller than the tension spring at the lower end of the slider.

[0014] The present invention has the following advantages over the prior art:

[0015] 1. This invention replaces the electrical control equipment with a mechanical structure, which reduces the weight of the equipment and avoids the limitations of the environment on the circuit. It greatly simplifies the structure of existing electrical control cutting equipment, reduces equipment costs, and makes manual operation simple and efficient, thus greatly improving practicality.

[0016] 2. This invention allows for manual operation of the sliding rods on both the front and rear sides, enabling the cutting height to be adjusted at any time according to the user's wishes. This allows for the cutting of mature tobacco leaves at different heights, significantly improving the cutting quality of tobacco leaves compared to existing electronically controlled cutting methods.

[0017] 3. By positioning the swing arm on the outermost side when the device is in motion, interference of the swing arm 4 with the tobacco leaves is avoided during the movement. During cutting, it can swing inward to a vertical position, ensuring that the U-shaped cutter is located on the outside of the plant, so that the slider moves up and down along the groove to cut the tobacco leaves. Compared with the telescopic cutting method of the scissor mechanism in the existing technology, this reduces the interference of the equipment with the tobacco leaves and lowers the lower limit of the cutting height.

[0018] 4. The inclined rod guides the cut tobacco leaves to fall uniformly onto the base for centralized collection, eliminating the need for manual picking up of the cut tobacco leaves. When not cutting, pulling the slide bar allows the inclined rod to move laterally along the clearance groove to comb the collected tobacco leaves to both sides, improving the efficiency of tobacco leaf collection. Attached Figure Description

[0019] Figure 1 This is the front view of the present invention.

[0020] Figure 2 This is a front sectional view of the present invention.

[0021] Figure 3 for Figure 2 A magnified view of A in the middle.

[0022] Figure 4 This is a top sectional view of the present invention.

[0023] Figure 5 for Figure 4 A magnified view of B in the middle.

[0024] Figure 6 for Figure 4 A magnified view of C.

[0025] Figure 7This is a bottom view of the present invention.

[0026] Figure 8 This is a front sectional view of the pendulum rod of the present invention in a vertical position.

[0027] Figure 9 This is a front sectional view of the swing arm of the present invention.

[0028] Figure 10 This is a three-dimensional axonometric view of the base plate, baffle, and vertical plate of the present invention.

[0029] Figure 11 This is a three-dimensional isometric view of the slider and U-shaped cutter of the present invention.

[0030] Figure 12 This is a three-dimensional axonometric view of the present invention. Detailed Implementation

[0031] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] Depend on Figures 1 to 12 The present invention comprises two horizontally placed base plates 1, arranged at intervals. Each base plate 1 has two vertical tubes 2 fixed on it, and two horizontal tubes 3 are arranged on its upper side, respectively, and are fixedly connected to the vertical tubes 2 at their corresponding left and right ends. Each base plate 1 has a swing rod 4 hinged to its inner end, which can swing left and right around the hinge axis. Each swing rod 4 has a slider 5 that can slide up and down on its inner end. The lower end of the slider 5 is connected to the swing rod by a tension spring, which keeps the slider 5 always in the swing position. At the bottom of rod 4, a U-shaped cutter 6 is fixed to the inner end of slider 5. The upper and lower sides of the U-shaped cutter 6 are sharpened. When the two swing rods 4 swing upward to a vertical position, the ends of the two U-shaped cutters 6 can fit together to form a ring. The left ends of the two vertical tubes 2 on the left side are equipped with horizontally placed handrails 7. A connecting rod 8 is fixed between the handrail 7 and the two vertical tubes 2. A sliding rod 9 that can move horizontally left and right is provided on the connecting rod 8. When the two sliding rods 9 move left and right, they can drive the sliders 5 on the left and right sides to move up and down respectively.

[0033] Each of the U-shaped cutters 6 has a horizontally placed guide rod 10 fixed at both ends. Multiple inclined rods 11 are evenly distributed on the guide rod 10 from front to back. The inclined rods 11 are set perpendicular to the guide rod 10 and their outer ends are inclined downward. A clearance groove 12 is opened on the base plate 1 at the position corresponding to each inclined rod 11. When the swing rod 4 swings outward, the inclined rod 11 can be placed in the clearance groove 12.

[0034] Each of the aforementioned rocker arms 4 has a groove 13 on its inner end face. The slider 5 is placed in the groove 13 and can slide up and down. A through hole 14 is provided on the outside of the groove 13 on the rocker arm 4, extending through the rocker arm 4 along its length. A first winding wheel 15 and a second winding wheel 16 are rotatably connected to the lower end face of each base plate 1. The first winding wheel 15 and the second winding wheel 16 can rotate synchronously. A first pull rope 17 is fixedly connected to the upper end of each slider 5. The other end of the first pull rope 17 passes through the through hole 14 from top to bottom and is fixed to the first winding wheel 15. When the first spool 15 rotates, the first pull rope 17 can be wound around its outer side; a second pull rope 18 is fixedly connected to each slide bar 9. The second pull rope 18 on the front side passes through the front vertical tube 2 downward to the lower end face of the left base 1 and is fixedly connected to the second spool 16 on the left side. The second pull rope 18 on the rear side passes through the rear vertical tube 2 upward in sequence through the horizontal tube 3 and the right rear vertical tube 2 to the lower end face of the right base 1 and is fixedly connected to the second spool 16 on the right side. When the second spool 16 rotates, the second pull rope 18 can be wound around its outer side.

[0035] The first winding reel 15 and the second winding reel 16 are respectively fixed with gears on their upper outer edges. The gears on the corresponding sides mesh with each other, and the outer diameter of the gear on the first winding reel 15 is smaller than the diameter of the gear on the second winding reel 16.

[0036] Two base plates 1 are fixed with baffles 19 on their inner sides. The baffles 19 can prevent the swing rod 4 from swinging inward from the vertical direction. The base plate 1 is provided with a clearance opening on the lower side of the swing rod 4. The first pull rope 17 can pass through the clearance opening to the lower side of the base 1.

[0037] Vertical plates 20 are fixed to the outer sides of the two base plates 1 respectively. A through groove 21 is opened in the middle of the vertical plate 20, which passes through the left and right end faces. The swing rod 4 can be placed in the through groove 21 when it swings outward. The front and rear end faces of the through groove 20 are respectively provided with pin holes 22. A pin 23 that can move back and forth is provided in the pin hole 22. A stop bar 24 that can rotate in the horizontal direction is respectively provided on the lower side of the two baffles 19. When there is no external force, the free end of the stop bar 24 always faces inward. When the stop bar 24 swings back and forth, it can drive the pin 23 to move inward to the inside of the pin hole.

[0038] The stop lever 24 is an L-shaped lever with a vertical shaft. Each stop lever 24 has two third pull ropes 25 fixed to its vertical shaft. The third pull ropes 25 pass through the inner end of the base plate 1 to the front and rear sides of the base plate 1, and pass through the vertical plate 20 to the pin hole 22 and are fixedly connected to the pin 23. A compression spring is provided between the pin 23 and the pin hole 22, and the compression spring keeps the pin 23 always extending out of the pin hole 22.

[0039] The connecting rod 8 has a through groove that extends through the front and rear ends, and the sliding rod 9 is placed in the through groove and can slide left and right along the through groove.

[0040] The base plate 1 is provided with two sets of front and rear rollers 26 on its outer side.

[0041] A torsion spring is provided at the hinge position of the swing arm 4. The torsion spring ensures that the free end of the swing arm 4 is always located in the through groove 21 when no external force is applied. The torsion spring torque is much smaller than the tension spring at the lower end of the slider 5.

[0042] It is worth mentioning that, in order to facilitate the reversing of the first pull rope 17, a reversing wheel is provided at the free end of the swing arm 4, and the first pull rope 17 passes around the annular wheel and enters the through hole 14.

[0043] The inner sides of the two base plates 1 are both sloping, making the gap between the two base plates 1 wider at both ends and narrower in the middle, which facilitates the entry of tobacco seedlings into the gap area between the two base plates 1.

[0044] The third pull rope 25 is fixed with pull nets 27 on the front and rear sides of the base plate 1. The lower end of the pull net 27 is fixed to the base plate 1. The pull net can prevent the collected tobacco leaves from falling from the front and rear sides of the base plate 1.

[0045] In use, the device is first pushed to the position of the tobacco seedling by the handle 7. Moving the device forward allows the seedling to pass between the two base plates 1 and enter the middle of the device. At this point, the lower stem of the seedling touches the stop bar 24, causing it to swing backward. The stop bar 24, via the third pull rope, moves the pin 23 inward toward the pin hole 22. The pin 23 does not obstruct the swinging rod 4 from swinging inward. Then, the slide bar 9 is manually pulled towards the handle 7. The slide bar 9, via the second pull rope 18, drives the second winding wheel 16 to rotate. The second winding wheel 16, via gears, drives the first winding wheel 15 to rotate synchronously. The first winding wheel 15, via the first pull rope 17, drives the swinging rod 4 to swing inward against the torsion spring's torque until the swinging rod 4 swings to a vertical position and is blocked by the baffle 19. At this point, both... The U-shaped cutter 6 is positioned just outside the stem of the tobacco seedling. Continuing to pull the slide bar 9, the slider 5 can overcome the tension of the spring and move upward along the slide groove 13. During the upward movement of the slider 5, the upper blade of the U-shaped cutter 6 can cut the passing tobacco leaves. The rising height of the U-shaped cutter 6 can be controlled by changing the translation distance of the slide bar 9 according to the height of the mature tobacco leaves. The cut tobacco leaves fall onto the bottom plates 1 on both sides under the guidance of the guide rod 10 and the inclined rod 11. After cutting one tobacco leaf, the slide bar 9 is released, and the swing rod 4 and the U-shaped cutter 6 can return to their initial positions under the action of the torsion spring and tension spring. The swing rod 4 does not obstruct the upper tobacco leaves and continues to move the entire device forward to the position of the next tobacco seedling. The above operation is repeated to continue cutting the tobacco leaves.

[0046] When a certain amount of tobacco leaves are collected on the base plate 1, and the stop bar 24 is in the initial position, the slide bar 9 can be pulled directly. At this time, the swing bar 4 cannot swing upward due to the obstruction of the pin 23, but the slider 5 can still move upward along the slide groove 13. During the movement of the slider 5, all the inclined bars 11 can move outward along the relief groove 12 to push and gather the tobacco leaves collected on the base plate 1, ensuring that the tobacco leaves cut off later can continue to be collected by the base plate 1, thereby increasing the collection capacity of the base plate 1.

[0047] This invention replaces electrical control equipment with a mechanical structure, reducing the weight of the equipment and avoiding environmental limitations on the circuitry. By manually operating the sliding rods 9 on both sides, the height of the cutter can be adjusted at any time according to the user's wishes, enabling the cutting of mature tobacco leaves at different heights and greatly improving the cutting quality. The swing rod 4, positioned on the outermost side when the device is moving, avoids interference with the tobacco leaves during movement. During cutting, it swings inward to a vertical position, ensuring the U-shaped cutter 6 is positioned outside the plant, allowing the slider 5 to move up and down along the groove 13 to cut the tobacco leaves. Compared to the telescopic cutting method of the scissor mechanism in existing technologies, this invention reduces interference with the tobacco leaves and lowers the lower limit of the cutting height. The guiding action of the inclined rod 11 allows the cut tobacco leaves to fall uniformly above the base 1 for centralized collection, eliminating the need for manual picking up of the cut leaves. In non-cutting operation, pulling the sliding rod 9 allows the inclined rod 11 to move laterally along the clearance groove 12, combing the collected tobacco leaves to both sides, improving collection efficiency.

Claims

1. A tobacco leaf harvesting auxiliary device, characterized in that: It includes two horizontally placed base plates (1) on the left and right, with the two base plates (1) arranged at intervals. Each base plate (1) is fixed with two vertical tubes (2) at the front and back. Two horizontal tubes (3) are set on the upper side of the vertical tubes (2), and the horizontal tubes (3) are fixedly connected to the vertical tubes (2) at the left and right ends of the corresponding sides. Each base plate (1) has a swing rod (4) hinged to its inner end. The swing rod (4) can swing left and right around the hinge axis. Each swing rod (4) has a slider (5) that can slide up and down on its inner end. The lower end of the slider (5) is connected to the swing rod through a tension spring. The tension spring keeps the slider (5) always at the position of the swing rod (4). At the bottom, a U-shaped cutter (6) is fixed to the inner end of the slider (5). The upper and lower sides of the U-shaped cutter (6) are sharpened respectively. When the two swing rods (4) swing upward to the vertical position, the ends of the two U-shaped cutters (6) can fit together to form a ring. The left ends of the two vertical tubes (2) on the left side are provided with horizontally placed handrails (7). A connecting rod (8) is fixed between the handrail (7) and the two vertical tubes (2). A sliding rod (9) that can move horizontally left and right is provided on the connecting rod (8). When the two sliding rods (9) move left and right, they can drive the sliders (5) on the left and right sides to move up and down respectively. Each of the U-shaped cutters (6) has a horizontally placed guide rod (10) fixed at both ends. Multiple inclined rods (11) are evenly distributed on the guide rods (10) from front to back. The inclined rods (11) are set perpendicular to the guide rods (10) and their outer ends are inclined downwards. The bottom plate (1) has a clearance groove (12) at the position corresponding to each inclined rod (11). Each of the aforementioned rocker arms (4) has a groove (13) on its inner end face. The slider (5) is placed in the groove (13) and can slide up and down. A through hole (14) is provided on the outside of the groove (13) of the rocker arm (4) along the length direction. A first winding wheel (15) and a second winding wheel (16) are rotatably connected to the lower end face of each base plate (1). The first winding wheel (15) and the second winding wheel (16) can rotate synchronously. A first pull rope (17) is fixedly connected to the upper end of each slider (5). The other end of the first pull rope (17) passes through the through hole (14) from top to bottom and is connected to the first winding wheel (15). When the first spool (15) rotates, the first pull rope (17) can be wound around its outer side; a second pull rope (18) is fixedly connected to each slide bar (9). The second pull rope (18) on the front side passes through the vertical tube (2) on the front side and goes down to the lower end face of the left bottom plate (1) and is fixedly connected to the second spool (16) on the left side. The second pull rope (18) on the rear side passes through the vertical tube (2) on the rear side and goes up through the horizontal tube (3) and the right rear vertical tube (2) to the lower end face of the right bottom plate (1) and is fixedly connected to the second spool (16) on the right side. When the second spool (16) rotates, the second pull rope (18) can be wound around its outer side. The first spool (15) and the second spool (16) are respectively fixed with gears on their upper outer edges. The gears on the corresponding sides mesh with each other. The outer diameter of the gear on the first spool (15) is smaller than the diameter of the gear on the second spool (16).

2. The tobacco leaf auxiliary harvesting device according to claim 1, characterized in that, The inner ends of the two base plates (1) are fixed with baffles (19). The baffles (19) can prevent the swing rod (4) from swinging inward from the vertical direction. The base plate (1) is provided with a clearance opening on the lower side of the swing rod (4). The first pull rope (17) can pass through the clearance opening to the lower side of the base plate (1).

3. The tobacco leaf auxiliary harvesting device according to claim 1, characterized in that, The two base plates (1) are respectively fixed with vertical plates (20) on their outer sides. The vertical plates (20) have through slots (21) in the middle that pass through the left and right end faces. The swing rod (4) can be placed in the through slot (21) when it swings outward. The front and rear end faces of the through slot (21) are respectively provided with pin holes (22). The pin holes (22) are provided with pins (23) that can move back and forth. The two baffles (19) are respectively provided with stops (24) that can rotate in the horizontal direction. When there is no external force, the free end of the stops (24) always faces inward. When the stops (24) swings back and forth, it can drive the pins (23) to move inward to the inside of the pin holes.

4. The tobacco leaf auxiliary harvesting device according to claim 3, characterized in that, The stop bar (24) is an L-shaped bar with a vertical shaft. Each stop bar (24) has two third pull ropes (25) fixed to its vertical shaft. The third pull ropes (25) pass through the inner end of the base plate (1) to the front and rear sides of the base plate (1) and pass through the vertical plate (20) to the pin hole (22) and are fixedly connected to the pin (23). A compression spring is provided between the pin (23) and the pin hole (22).

5. The tobacco leaf auxiliary harvesting device according to claim 1, characterized in that, The connecting rod (8) has a through groove that runs through the front and rear ends. The sliding rod (9) is placed in the through groove and can slide left and right along the through groove.

6. The tobacco leaf auxiliary harvesting device according to claim 1, characterized in that, The base plate (1) is provided with two sets of front and rear rollers (26) on its outer side.

7. The tobacco leaf auxiliary harvesting device according to claim 1, characterized in that, The swing arm (4) is provided with a torsion spring at the hinge position. The torsion spring torque is much smaller than the tension of the tension spring at the lower end of the slider (5).

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