Tobacco leaf harvesting device and harvester

Abstract

The invention discloses a tobacco leaf harvesting device which comprises a harvesting unit, a conveying unit and an action unit, the harvesting unit comprises a harvesting frame, a harvesting driver and a harvesting blade, the harvesting driver drives the harvesting blade to rotate to harvest tobacco plants so as to complete tobacco leaf harvesting, and the conveying unit can convey the cut tobacco plants. The tobacco leaf harvesting efficiency is improved; it needs to be emphasized that the tobacco leaf harvesting device is provided with the action unit, the action unit can drive the harvesting unit to adjust the position in the vertical direction and the horizontal direction so as to adapt to various tobacco leaf harvesting working conditions, the tobacco leaf harvesting working efficiency is improved, and the flexible adaptability of the tobacco leaf harvesting device is improved. According to the tobacco leaf harvesting device, the connecting rod mechanism is used for driving the conveying unit and the harvesting unit to move, the device is compact in structure and high in transmission efficiency, and the maintenance convenience of the device is improved while harvesting position adjustment is achieved. The invention further provides a harvester which comprises a running platform and the tobacco leaf harvesting device.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco harvesting equipment and peripheral supporting facilities thereof, in particular to a tobacco leaf harvesting device and a harvester. Background Art

[0002] There are two stages in harvesting tobacco leaves in the field: one is the harvesting of the lower leaves, and the other is the harvesting of the upper terminal leaves.

[0003] The harvesting of lower tobacco leaves is currently mainly done by manual harvesting. In the prior art, there is also a mechanized harvesting method, which is characterized by harvesting one leaf at a time.

[0004] In addition to harvesting the upper tobacco leaves one by one, you can also use the method of cutting the terminal tobacco plants, harvesting 5-6 tobacco leaves at the terminal part together and cutting them at the middle boundary of the tobacco plant.

[0005] In the process of cutting the end of tobacco plants, there are two problems that need to be solved: first, the height of tobacco plants is inconsistent, some are high and some are low, and the cutting position needs to be adjusted up and down. Second, the planting of tobacco plants is not completely in a straight line, and the cutting position needs to be adjusted left and right.

[0006] Although there are harvesters with the function of adjusting the cutting position in the prior art, the existing harvesters with the adjustment function have a single adjustment direction and are still unable to adapt to various tobacco harvesting conditions, resulting in low tobacco harvesting efficiency and poor adaptability of the harvester. Summary of the invention

[0007] The purpose of the present invention is to provide a tobacco harvesting device and a harvester to solve the problems existing in the above-mentioned related technologies, so that the harvester can adjust the cutting position, adapt to various tobacco harvesting conditions, improve the efficiency of tobacco harvesting, and at the same time enhance the flexibility and adaptability of the harvester.

[0008] To achieve the above object, the present invention provides the following solutions:

[0009] The present invention provides a tobacco leaf harvesting device, comprising:

[0010] A harvesting unit, the harvesting unit comprising a harvesting frame, a harvesting driver and a harvesting blade, the harvesting driver being fixed on the harvesting frame, the harvesting blade being rotatably arranged on the harvesting frame, the harvesting blade being able to contact with and cut off the tobacco plants, and the output end of the harvesting driver being transmission-connected to the harvesting blade;

[0011] A conveying unit, one end of which is connected to the harvesting unit and is capable of conveying cut tobacco plants;

[0012] The action unit, the harvesting unit and the transmission unit are both connected to the action unit, the action unit can drive the harvesting unit and the transmission unit to move in the vertical direction and the horizontal direction, the action unit adopts a connecting rod mechanism, and the action unit can be connected to the installation base.

[0013] Preferably, the action unit includes a swing frame and an action connecting rod, the harvesting unit also includes a harvesting connecting rod, the harvesting connecting rod is connected to the harvesting frame, the conveying unit includes a conveying frame, the swing frame, the action connecting rod, the harvesting connecting rod and the conveying frame are hinged in sequence to form a parallelogram connecting rod mechanism.

[0014] Preferably, the action unit also includes a telescopic rod, one end of the telescopic rod is hinged to the swing frame, the hinge axis of the telescopic rod and the swing frame is parallel to the hinge axis of the swing frame and the conveying frame, the other end of the telescopic rod is hinged to the conveying frame, the hinge point of the telescopic rod and the conveying frame is located between the harvesting unit and the swing frame, the length of the telescopic rod can be adjusted, and the telescopic rod, the swing frame and the conveying frame constitute a sliding guide rod mechanism.

[0015] Preferably, the swing frame includes a fixed support, a swing support and a swing pin, the fixed support can be connected to the mounting base, the swing support is hinged to the action connecting rod and the conveying frame, the swing support is connected to the swing pin, the fixed support has a mounting sleeve adapted to the swing pin, the swing pin is rotatably connected to the mounting sleeve, and a wear-resistant sleeve is arranged between the swing pin and the mounting sleeve.

[0016] Preferably, the fixed support is connected to a limit block, the limit block is located on one side of the swing pin, and the limit block can abut against the swing support to limit the relative rotation angle between the swing support and the fixed support;

[0017] The swing support has a contact block matching the limit block, the limit block can abut against the contact block, and the limit block corresponds to the contact block one by one;

[0018] The limiting block is movably connected to the fixed support.

[0019] Preferably, the harvesting frame is a U-shaped structure, the cutting edge of the harvesting blade is located in the U-shaped groove of the harvesting frame to cut off the tobacco plants entering the U-shaped groove of the harvesting frame; the connection position of the harvesting blade and the harvesting frame can be adjusted, and the adjustment direction is parallel to the depth direction of the U-shaped groove of the harvesting frame; a protective cover is provided on the side of the harvesting blade close to the transmission unit, and the protective cover is connected to the harvesting frame;

[0020] The harvesting unit also includes a guide frame, and the number of the guide frames is two groups. The two guide frames are respectively connected to the two sides of the U-shaped opening of the harvesting frame, and the spacing between the two guide frames gradually increases in the direction away from the harvesting blade, and the longitudinal cross-sectional area of ​​the guide frame gradually decreases in the direction away from the harvesting blade; the harvesting frame is also provided with a chip dropping hole, which is a through hole, and the chip dropping hole is located on the side of the harvesting blade away from the transmission unit.

[0021] Preferably, the conveying unit further comprises a conveying assembly, which comprises a conveying driver, a conveying sprocket, a conveying chain and a conveying fork. The conveying driver is fixed on the conveying frame. The conveying sprockets are in two groups. The output end of the conveying driver is connected to one of the conveying sprockets. The two groups of conveying sprockets cooperate to tighten the conveying chain and drive the conveying chain to move. The conveying forks are in multiple groups. The conveying forks are connected to the conveying chain and can clamp the cut tobacco plants.

[0022] The conveying fork has a plurality of clamping branches at one end away from the conveying chain, wherein the clamping branches have clamping tips, and gaps are provided between adjacent clamping branches.

[0023] Preferably, the number of the conveying components is two groups, the two groups of conveying components are symmetrically arranged with the center line of the harvesting unit as the axis, and the rotation directions of the conveying chains of the two groups of conveying components are opposite;

[0024] The conveying assembly further comprises a tensioning mechanism, the tensioning mechanism is connected to the conveying frame, the tensioning mechanism is connected to one of the conveying sprockets, and can drive the conveying sprocket to move to tension the conveying chain;

[0025] The conveying unit further comprises a first mounting frame, a second mounting frame and a mounting seat, wherein the first mounting frame, the second mounting frame and the mounting seat are all connected to the conveying frame and are located at a side of the conveying frame away from the conveying assembly, the first mounting frame is hinged to the swing frame, the second mounting frame is hinged to the harvesting connecting rod, and the mounting seat is hinged to the telescopic rod;

[0026] The conveying frame is connected with a conveying cover plate, and the conveying cover plate and the conveying frame form a U-shaped groove structure, and the conveying chain is located in the space surrounded by the conveying cover plate and the conveying frame.

[0027] The present invention provides a harvester, comprising a traveling platform and the above-mentioned tobacco harvesting device, wherein the tobacco harvesting device is installed on the traveling platform, and the traveling platform can drive the tobacco harvesting device to move.

[0028] Preferably, the number of the tobacco leaf harvesting devices is multiple groups, and the multiple groups of tobacco leaf harvesting devices are arranged in parallel on the traveling platform, and there are gaps between adjacent tobacco leaf harvesting devices;

[0029] The tobacco leaf harvesting device is detachably connected to the traveling platform, and the connection position of the two can be adjusted.

[0030] Compared with the related art, the present invention has achieved the following technical effects: the tobacco leaf harvesting device of the present invention includes a harvesting unit, a transmission unit and an action unit, wherein the harvesting unit includes a harvesting frame, a harvesting drive and a harvesting blade, the harvesting drive is fixed on the harvesting frame, the harvesting blade is rotatably arranged on the harvesting frame, the harvesting blade can contact with and cut off the tobacco plants, and the output end of the harvesting drive is connected to the harvesting blade for transmission; one end of the transmission unit is connected to the harvesting unit and can transport the cut tobacco plants; the harvesting unit and the transmission unit are both connected to the action unit, the action unit can drive the harvesting unit and the transmission unit to move in the vertical and horizontal directions, the action unit adopts a connecting rod mechanism, and the action unit can be connected to the installation base.

[0031] In the tobacco harvesting device of the present invention, the harvesting driver drives the harvesting blade to rotate to harvest tobacco plants to complete tobacco harvesting, and the transmission unit can transport the cut tobacco plants to improve the efficiency of tobacco harvesting. It should be emphasized that the present invention is provided with an action unit, and the action unit can drive the harvesting unit to adjust its position in the vertical and horizontal directions to adapt to various tobacco harvesting conditions, improve the efficiency of tobacco harvesting, and enhance the flexibility and adaptability of the tobacco harvesting device. The tobacco harvesting device of the present invention utilizes a connecting rod mechanism to drive the transmission unit and the harvesting unit to move. The device has a compact structure and high transmission efficiency. While achieving the adjustment of the harvesting position, it improves the convenience of maintenance of the device. The present invention also provides a harvester, including a traveling platform and the above-mentioned tobacco harvesting device, and the traveling platform can drive the tobacco harvesting device to move to further improve the efficiency of tobacco harvesting. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 This is a schematic diagram of the structure of a tobacco leaf harvesting device disclosed in an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of the structure of a harvesting unit of a tobacco harvesting device disclosed in an embodiment of the present invention;

[0035] Figure 3 A partial structural schematic diagram of a harvesting unit of a tobacco harvesting device disclosed in an embodiment of the present invention;

[0036] Figure 4 A schematic diagram of the structure of a harvesting blade and a harvesting driver of a harvesting unit of a tobacco harvesting device disclosed in an embodiment of the present invention;

[0037] Figure 5 It is a schematic structural diagram of a protective cover of a harvesting unit of a tobacco harvesting device disclosed in an embodiment of the present invention;

[0038] Figure 6 It is a schematic structural diagram of a transmission unit of a tobacco leaf harvesting device disclosed in an embodiment of the present invention;

[0039] Figure 7 A schematic diagram of the internal structure of a transmission unit of a tobacco leaf harvesting device disclosed in an embodiment of the present invention;

[0040] Figure 8 It is a partial structural schematic diagram of a transmission unit of a tobacco leaf harvesting device disclosed in an embodiment of the present invention;

[0041] Fig. 9 It is an axonometric schematic diagram of a tensioning mechanism of a conveying unit of a tobacco leaf harvesting device disclosed in an embodiment of the present invention;

[0042] Fig.10 It is a front view schematic diagram of a tensioning mechanism of a conveying unit of a tobacco leaf harvesting device disclosed in an embodiment of the present invention;

[0043] Fig.11 A schematic side view of a tensioning mechanism of a conveying unit of a tobacco leaf harvesting device disclosed in an embodiment of the present invention;

[0044] Fig.12 It is an axonometric schematic diagram of a swing frame of an action unit of a tobacco leaf harvesting device disclosed in an embodiment of the present invention;

[0045] Fig.13 It is an axonometric schematic diagram of other angles of the swing frame of the action unit of the tobacco harvesting device disclosed in the embodiment of the present invention;

[0046] Fig.14 It is a structural schematic diagram of a swing support of a swing frame of an action unit of a tobacco leaf harvesting device disclosed in an embodiment of the present invention;

[0047] Fig.15 It is a schematic structural diagram of a swing pin shaft of a swing frame of an action unit of a tobacco harvesting device disclosed in an embodiment of the present invention;

[0048] Fig.16It is a structural schematic diagram of a fixed support of a swing frame of an action unit of a tobacco harvesting device disclosed in an embodiment of the present invention;

[0049] Fig.17 It is a structural schematic diagram of a harvester disclosed in an embodiment of the present invention;

[0050] Fig.18 Schematic diagram of other structures of the harvester disclosed in the embodiment of the present invention;

[0051] Fig.19 It is a schematic diagram of the structure of the travel platform of the harvester disclosed in the embodiment of the present invention.

[0052] In the figure: 100, tobacco leaf harvesting device; 200, harvester;

[0053] 1. Harvesting unit; 101. Harvesting frame; 102. Harvesting drive; 103. Harvesting blade; 104. Harvesting connecting rod; 105. Guide frame; 106. Chip drop hole; 107. Protective cover;

[0054] 2. Conveying unit; 201. Conveying frame; 202. Conveying driver; 203. Conveying sprocket; 204. Conveying chain; 205. Conveying fork; 206. Tensioning mechanism; 207. Tensioning fixed frame; 208. Tensioning sliding frame; 209. Tensioning adjusting screw; 210. Guide groove; 211. First mounting frame; 212. Second mounting frame; 213. Mounting seat; 214. Conveying cover plate; 215. Guide support plate; 216. Chain guide bar;

[0055] 3. Action unit; 301. Swing frame; 302. Action connecting rod; 303. Telescopic rod; 304. Fixed support; 305. Swing support; 306. Swing pin; 307. Mounting sleeve; 308. Limit block; 309. Contact block;

[0056] 4. Driving platform. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] The purpose of the present invention is to provide a tobacco harvesting device and a harvester to solve the problems existing in the above-mentioned related technologies, so that the harvester can adjust the cutting position, adapt to various tobacco harvesting conditions, improve the efficiency of tobacco harvesting, and at the same time enhance the flexibility and adaptability of the harvester.

[0059] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0060] Embodiment 1

[0061] This embodiment provides a tobacco leaf harvesting device 100, please refer to Figure 1-Figure 19 , including a harvesting unit 1, a transmission unit 2 and an action unit 3, wherein the harvesting unit 1 includes a harvesting frame 101, a harvesting driver 102 and a harvesting blade 103, the harvesting driver 102 is fixed on the harvesting frame 101, the harvesting blade 103 is rotatably arranged on the harvesting frame 101, the harvesting blade 103 can contact with and cut off the tobacco plants, and the output end of the harvesting driver 102 is connected to the harvesting blade 103 by transmission; one end of the transmission unit 2 is connected to the harvesting unit 1 and can transport the cut tobacco plants; the harvesting unit 1 and the transmission unit 2 are both connected to the action unit 3, the action unit 3 can drive the harvesting unit 1 and the transmission unit 2 to move in the vertical direction and the horizontal direction, the action unit 3 adopts a connecting rod mechanism, and the action unit 3 can be connected to the installation base.

[0062] In the tobacco harvesting device 100 of the present invention, the harvesting driver 102 drives the harvesting blade 103 to rotate to harvest tobacco plants, so as to complete tobacco harvesting, and the transmission unit 2 can transport the cut tobacco plants, thereby improving the efficiency of tobacco harvesting; it should be emphasized that the present invention is provided with an action unit 3, and the action unit 3 can drive the harvesting unit 1 to adjust its position in the vertical and horizontal directions to adapt to various tobacco harvesting conditions, improve the efficiency of tobacco harvesting, and enhance the flexibility and adaptability of the tobacco harvesting device 100. The tobacco harvesting device 100 of the present invention utilizes a connecting rod mechanism to drive the transmission unit 2 and the harvesting unit 1 to move, and the device has a compact structure and high transmission efficiency. While realizing the adjustment of the harvesting position, the maintenance convenience of the device is improved.

[0063] It should be explained here that the installation base can be a frame of the harvester 200 or other carrying equipment to drive the tobacco harvesting device 100 of the present invention to move and perform tobacco harvesting. Reasonable selection of the installation base is a common method used by those skilled in the art and will not be repeated here.

[0064] Among them, the action unit 3 includes a swing frame 301 and an action connecting rod 302, the harvesting unit 1 also includes a harvesting connecting rod 104, and the harvesting connecting rod 104 is connected to the harvesting frame 101. The transmission unit 2 includes a transmission frame 201, and the swing frame 301, the action connecting rod 302, the harvesting connecting rod 104 and the transmission frame 201 are hinged in sequence to form a parallelogram linkage mechanism. While adjusting the harvesting position of the harvesting unit 1, the action unit 3, the transmission unit 2 and the harvesting unit 1 construct a parallelogram linkage mechanism, so that during the adjustment of the height of the harvesting unit 1, it can always be kept level with the tobacco plant, ensuring that the harvesting unit 1 can smoothly cut the tobacco plant, and improving the movement stability and working reliability of the harvesting unit 1. In this specific embodiment, the number of the harvesting connecting rods 104 and the action connecting rods 302 are both two groups, the harvesting connecting rods 104 are symmetrically arranged on both sides of the harvesting frame 101, and the action connecting rods 302 are symmetrically arranged on both sides of the transmission unit 2 and the swing frame 301, so as to further improve the motion stability of the action unit 3 and ensure the reliability of the position adjustment of the harvesting unit 1. In other specific embodiments that can be realized by the present invention, the angle between the harvesting unit 1 and the tobacco plant can be adjusted according to different harvesting conditions. In the process of adjusting the height of the harvesting unit 1, the parallelogram connecting rod mechanism can also avoid the angle change of the harvesting unit 1 and ensure the structural stability of the harvesting unit 1.

[0065] Specifically, the action unit 3 further includes a telescopic rod 303, one end of which is hinged to the swing frame 301, the hinge axis of the telescopic rod 303 and the swing frame 301 is parallel to the hinge axis of the swing frame 301 and the conveying frame 201, the other end of the telescopic rod 303 is hinged to the conveying frame 201, the hinge axis of the telescopic rod 303 and the conveying frame 201 is parallel to the horizontal plane, the hinge point of the telescopic rod 303 and the conveying frame 201 is located between the harvesting unit 1 and the swing frame 301, the length of the telescopic rod 303 can be adjusted, and the telescopic rod 303, the swing frame 301 and the conveying frame 201 constitute a sliding guide rod mechanism. The telescopic rod 303 can be extended and retracted to drive the conveying unit 2 and the harvesting unit 1 to move in the vertical direction to adjust the height of the harvesting unit 1, and the telescopic rod 303, the swing frame 301 and the conveying frame 201 constitute a sliding guide rod mechanism, which improves the movement reliability of the action unit 3. In this specific embodiment, the telescopic rod 303 adopts an oil cylinder, which has a simple structure and reliable movement; cutting work can be performed when the oil cylinder is in a locked state; the height of the harvesting unit 1 can be adjusted when the oil cylinder is in a telescopic state, and the parallelogram linkage mechanism can be used to ensure that the cutting surface of the harvesting unit 1 maintains translational movement relative to the swing frame 301, thereby ensuring that the cutting surface of the harvesting blade 103 translates relative to the tobacco plant and is in a stable state; at the same time, the cutting height is adjustable, thereby meeting the cutting requirements of different tobacco plant heights. In other specific embodiments that can be realized by the present invention, the telescopic rod 303 can also adopt other structures such as a cylinder and an electric telescopic rod 303, so as to meet the movement of the action unit 3 while enhancing the flexibility and adaptability of the device.

[0066] At the same time, the swing frame 301 includes a fixed support 304, a swing support 305 and a swing pin 306. The fixed support 304 can be connected to the installation base. The swing support 305 is hinged with the action link 302 and the conveying frame 201. The swing support 305 is connected to the swing pin 306. The fixed support 304 has a mounting sleeve 307 adapted to the swing pin 306. The swing pin 306 is rotatably connected to the mounting sleeve 307. A wear-resistant sleeve is arranged between the swing pin 306 and the mounting sleeve 307. The fixed support 304 and the swing support 305 are rotationally connected by a swing pin 306, and the rotation axis is parallel to the vertical plane. The swing support 305 rotates relative to the fixed support 304 to adjust the horizontal position of the harvesting unit 1 to adapt to various harvesting conditions. The swing pin 306 is rotationally connected to the fixed support 304 by a mounting sleeve 307, which ensures smooth rotation of the swing support 305. A wear-resistant sleeve or rolling bearing is arranged between the swing pin 306 and the mounting sleeve 307, which extends the service life of the swing pin 306 and improves the structural reliability of the action unit 3.

[0067] In order to limit the swing range of the swing support 305 and improve the safety factor of the horizontal position adjustment of the harvesting unit 1, the fixed support 304 is connected to the limit block 308, and the limit block 308 is located on one side of the swing pin shaft 306. The limit block 308 can be offset against the swing support 305 to limit the relative rotation angle between the swing support 305 and the fixed support 304, thereby improving the movement safety of the device.

[0068] In this specific embodiment, there are two groups of limit blocks 308, which are respectively arranged on both sides of the rotation axis of the swing pin 306 to limit the left and right swing range of the swing support 305. In other specific embodiments that can be realized by the present invention, the swing support 305 has a contact block 309 that matches the limit block 308, and the limit block 308 can abut against the contact block 309, and the limit block 308 and the contact block 309 correspond one to one; when the swing support 305 rotates until the limit block 308 and the contact block 309 abut against each other, the swing support 305 is horizontally adjusted to the maximum angle. In other specific embodiments that can be realized by the present invention, the limit block 308 and the contact block 309 can both be made of elastic material, and when the limit block 308 and the contact block 309 abut against each other, they can buffer vibration, ensure the structural stability of the action unit 3, and further improve the working reliability of the harvesting unit 1.

[0069] It should be noted that, in this specific embodiment, the limit block 308 is movably connected to the fixed support 304, and the limit blocks 308 of different specifications can be replaced according to different limit requirements to adjust the swing angle range of the swing support 305, thereby improving the swing safety factor and the flexibility and adaptability of the device. In other specific embodiments that can be implemented by the present invention, the limit block 308 and the fixed support 304 can be connected by threads, and according to different limit requirements, the limit block 308 can be rotated to adjust its protrusion height from the fixed support 304, thereby achieving the purpose of adjusting the swing angle range of the swing support 305.

[0070] More specifically, the harvesting frame 101 is a U-shaped structure, and the cutting edge of the harvesting blade 103 is located in the U-shaped groove of the harvesting frame 101 to cut off the tobacco plants entering the U-shaped groove of the harvesting frame 101; when the tobacco harvester 200 of the present invention is working, it moves along the ridge length direction of the tobacco plants, and the tobacco plants enter the U-shaped opening of the harvesting frame 101, and the harvesting blade 103 rotates to cut the tobacco plants to achieve the harvesting of the terminal tobacco leaves. Among them, the connection position of the harvesting blade 103 and the harvesting frame 101 can be adjusted, and the adjustment direction is parallel to the depth direction of the U-shaped groove of the harvesting frame 101, to ensure that the harvesting blade 103 can cut off the tobacco plants, and adjust the position of the harvesting blade 103 to adapt to various specific harvesting conditions. It should also be noted that a protective cover 107 is provided on the side of the harvesting blade 103 close to the conveying unit 2, and the protective cover 107 is connected to the harvesting frame 101 to prevent the harvesting blade 103 from causing damage to the harvested tobacco leaves and operators, thereby improving the safety of the harvesting unit 1. The protective cover 107 can also reduce the splashing of debris and damage to the tobacco leaves.

[0071] In addition, the harvesting unit 1 also includes a guide frame 105, and the number of the guide frames 105 is two groups. The two guide frames 105 are respectively connected to the two sides of the U-shaped opening of the harvesting frame 101, and the distance between the two guide frames 105 gradually increases in the direction away from the harvesting blade 103, so that the opening of the harvesting unit 1 is enlarged and trumpet-shaped, so that the tobacco plants can smoothly enter the U-shaped groove of the harvesting frame 101 and then contact the harvesting blade 103, so that the harvesting blade 103 completes the cutting of the tobacco plants. At the same time, the longitudinal cross-sectional area of ​​the guide frame 105 gradually decreases in the direction away from the harvesting blade 103, which is beneficial to protect the tobacco leaves when the tobacco plants are introduced into the U-shaped groove and avoid damage to the tobacco leaves; on the other hand, the longitudinal cross-sectional area of ​​the guide frame 105 gradually increases in the direction close to the harvesting blade 103, which can lift the tobacco leaves that are drooping relative to the tobacco stems and avoid accidental damage to the tobacco leaves when cutting the tobacco plants; in this specific embodiment, the guide frame 105 is a pyramidal structure, which guides the tobacco plants to the harvesting blade 103, smoothly realizes the cutting of the tobacco plants, and effectively protects the tobacco leaves and avoids damage to the tobacco leaves. It should also be noted that the harvesting frame 101 is also provided with a chip drop hole 106, which is a through hole. The chip drop hole 106 is located on the side of the harvesting blade 103 away from the transmission unit 2. During the tobacco plant cutting process, the cutting debris can leak to the ground through the chip drop hole 106, ensuring the quality of tobacco leaf harvesting and preventing the harvesting debris from affecting the normal operation of the harvesting unit 1.

[0072] Furthermore, the transmission unit 2 also includes a transmission component, which includes a transmission driver 202, a transmission sprocket 203, a transmission chain 204 and a transmission fork 205. The transmission driver 202 is fixed on the transmission frame 201. There are two groups of transmission sprockets 203. The output end of the transmission driver 202 is connected to one of the transmission sprockets 203. The two groups of transmission sprockets 203 cooperate to tension the transmission chain 204 and drive the transmission chain 204 to move. There are multiple groups of transmission forks 205. The transmission forks 205 are connected to the transmission chains 204. The transmission forks 205 can clamp the cut tobacco plants. The transmission component adopts a chain transmission method with high transmission efficiency. The transmission chain 204 is used to drive the transmission fork 205 to move. The transmission fork 205 clamps the tobacco plants, thereby realizing the transportation of the cut tobacco plants, ensuring the continuous operation of the tobacco harvesting device 100, and improving the tobacco harvesting efficiency.

[0073] In this specific embodiment, in order to ensure the movement reliability of the conveying assembly, the conveying unit is further provided with a guide mechanism, which includes a guide support plate 215, which is connected to the conveying frame 201, and a chain guide bar 216 is provided on the guide support plate 215 to provide a guide for the operation of the conveying chain 204, improve the movement accuracy of the conveying assembly, and further improve the working reliability of the conveying unit 2. In other specific embodiments that can be realized by the present invention, the conveying assembly can also adopt other transmission structures, such as belt transmission and other transmission methods, to improve the flexibility and adaptability of the conveying unit 2 on the basis of ensuring the normal transportation of the harvested tobacco plants.

[0074] In this specific embodiment, the conveying fork 205 has a plurality of clamping branches at one end away from the conveying chain 204. The clamping branches have clamping tips that can be inserted into the cut tobacco. There are gaps between adjacent clamping branches, and the adjacent clamping branches can be used to clamp the cut tobacco to achieve clamping of the cut tobacco, thereby ensuring that the conveying unit 2 can smoothly transport the cut tobacco.

[0075] At the same time, in this specific embodiment, there are two groups of conveying components, and the two groups of conveying components are symmetrically arranged with the center line of the harvesting unit 1 as the axis, and the rotation directions of the conveying chains 204 of the two groups of conveying components are opposite, that is, the conveying chains 204 of one group of conveying components rotate in the clockwise direction, and the conveying chains 204 of the other group of conveying components rotate in the counterclockwise direction. The two groups of conveying chains 204 "roll oppositely", so that the tobacco plants clamped by the conveying forks 205 between the two groups of conveying chains 204 are transported to the far end by the harvesting unit 1 to collect the cut tobacco plants.

[0076] It should also be noted that the transmission component also includes a tensioning mechanism 206, which is connected to the transmission frame 201, and the tensioning mechanism 206 is connected to one of the transmission sprockets 203, and can drive the transmission sprocket 203 to move to tension the transmission chain 204, thereby ensuring the working reliability of the transmission component; in this specific embodiment, the transmission sprocket 203 includes an active transmission sprocket and a driven transmission sprocket, the output end of the transmission driver 202 is connected to the active transmission sprocket, and the tensioning mechanism 206 is connected to the driven transmission sprocket, and the tensioning mechanism 206 can adjust the position of the driven transmission sprocket to tension the transmission chain 204, thereby improving the working reliability of the transmission component and the transmission unit 2.

[0077] In this specific embodiment, the tensioning mechanism 206 includes a tensioning fixed frame 207, a tensioning sliding frame 208 and a tensioning adjustment screw 209. The tensioning fixed frame 207 is connected to the conveying frame 201, and the tensioning sliding frame 208 is slidably connected to the tensioning fixed frame 207, and the sliding direction is parallel to the connecting direction of the active conveying sprocket and the driven conveying sprocket. The tensioning fixed frame 207 is an L-shaped structure. The tensioning adjustment screw 209 passes through the tensioning fixed frame 207 and is connected to the tensioning sliding frame 208. The tensioning adjustment screw 209 is threadedly connected to the tensioning fixed frame 207. Rotating the tensioning adjustment screw 209 can adjust the relative position of the tensioning sliding frame 208 and the tensioning fixed frame 207, thereby driving the driven conveying sprocket to move. The driven conveying sprocket cooperates with the active conveying sprocket to achieve the purpose of tensioning the conveying chain 204. In order to improve the reciprocating sliding accuracy of the tensioning slide frame 208, a guide groove 210 is provided on the tensioning slide frame 208, and the tensioning fixed frame 207 has a guide block adapted to the guide groove 210, which provides a guide function for the reciprocating sliding of the tensioning slide frame 208, improves the reciprocating motion accuracy of the tensioning slide frame 208, and ensures the working reliability of the tensioning mechanism 206. In other specific embodiments that can be realized by the present invention, a buffer spring and a tensioning force adjustment nut can be added between the rotating tensioning adjustment screw 209 and the tensioning slide frame 208 to realize dynamic adjustment of the tensioning degree of the conveying chain 204 and improve its adaptability. This is a common method used by those skilled in the art and will not be repeated here.

[0078] Furthermore, the conveying unit 2 also includes a first mounting frame 211, a second mounting frame 212 and a mounting seat 213. The first mounting frame 211, the second mounting frame 212 and the mounting seat 213 are all connected to the conveying frame 201 and are located on the side of the conveying frame 201 away from the conveying component. The first mounting frame 211 is hinged to the swing frame 301, the second mounting frame 212 is hinged to the harvesting connecting rod 104, and the mounting seat 213 is hinged to the telescopic rod 303. The first mounting frame 211, the second mounting frame 212 and the mounting seat 213 are provided to provide stable support for the connection between the conveying unit 2 and other structures.

[0079] It should also be noted that the conveyor frame 201 is connected to a conveyor cover plate 214, and the conveyor cover plate 214 and the conveyor frame 201 form a U-shaped groove structure. The conveyor chain 204 is located in the space surrounded by the conveyor cover plate 214 and the conveyor frame 201. The conveyor cover plate 214 is provided to prevent dust, provide protection for the conveyor assembly, and ensure the working reliability of the conveyor assembly. In this specific embodiment, the number of conveyor assemblies is two groups, and the two conveyor cover plates 214 are symmetrically arranged on both sides of the conveyor frame 201 with the center line of the conveyor frame 201 as the axis, and the middle of the two conveyor cover plates 214 allows the cut tobacco plants to pass through.

[0080] Embodiment 2

[0081] This embodiment provides a harvester 200, including a traveling platform 4, and also includes the tobacco harvesting device 100 of the first embodiment. The tobacco harvesting device 100 is installed on the traveling platform 4, and the traveling platform 4 can drive the tobacco harvesting device 100 to move.

[0082] The harvester 200 of the present invention utilizes the traveling platform 4 to drive the tobacco harvesting device 100 to move and perform tobacco harvesting work. The tobacco harvesting device 100 can adjust the harvesting position in the horizontal and vertical directions to adapt to various harvesting conditions, thereby improving the flexibility and adaptability of the harvester 200 and the harvesting work efficiency.

[0083] In order to further improve the efficiency of tobacco harvesting, the number of tobacco harvesting devices 100 can be set to multiple groups, and the multiple groups of tobacco harvesting devices 100 are arranged in parallel on the driving platform 4, and there are gaps between adjacent tobacco harvesting devices 100; in the present specific embodiment, three groups of tobacco harvesting devices 100 are arranged, and the harvesting of three rows of tobacco plants can be completed in one travel. In actual applications, the number of tobacco harvesting devices 100 can be adjusted according to actual harvesting needs and the specifications of the driving platform 4 to improve the flexibility and adaptability of the harvester 200.

[0084] In other specific embodiments that can be realized by the present invention, the tobacco harvesting device 100 is detachably connected to the traveling platform 4, and the connection position between the two can be adjusted. The connection position between the tobacco harvesting device 100 and the traveling platform 4 can be adjusted to adapt to different ridge widths or other specific harvesting requirements, thereby further improving the adaptability and harvesting efficiency of the harvester 200.

[0085] In practical applications, in order to collect the harvested tobacco plants, the harvester 200 may be provided with a storage unit, which is located on a side of the conveying unit 2 away from the harvesting unit 1 , and the conveying unit 2 transports the harvested tobacco plants to the storage unit for collection.

[0086] The tobacco harvesting device 100 of the present invention is suitable for cutting the tobacco plants of the terminal tobacco leaves. Since the heights of the tobacco plants are different and the arrangement straightness of each row is different, the tobacco harvesting device 100 of the present invention uses a connecting rod mechanism to drive the harvesting unit 1 to allow the cutting height to be adjusted in the vertical direction, and can swing in the horizontal direction to adjust the cutting direction, and can always maintain the level during the adjustment process of the harvesting unit 1, so as to ensure the smooth harvesting of the tobacco plants. In the tobacco harvesting device 100 of the present invention, the harvesting unit 1 is provided with a trumpet-shaped channel to ensure that the tobacco plants smoothly enter the harvesting unit 1 and contact the harvesting blade 103 to complete the harvesting of the tobacco plants. The harvested tobacco plants are clamped and fixed by the transmission fork 205 of the transmission unit 2, and are transmitted to the subsequent storage unit. The tobacco harvesting device 100 of the present invention is suitable for the harvesting of tobacco plants of various specifications and different planting conditions, which greatly improves the flexibility and adaptability of the tobacco harvesting device 100 and improves the efficiency of tobacco harvesting.

[0087] Terminology explanation:

[0088] Terminal tobacco leaves: refers to the 5 to 6 tobacco leaves remaining at the top of the tobacco plant after the tobacco leaves at the bottom of the tobacco plant are harvested.

[0089] Harvesting of terminal tobacco leaves: refers to the process of directly cutting off the terminal tobacco stems and harvesting the terminal tobacco leaves together.

[0090] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A tobacco leaf harvesting device, characterized in that: include: A harvesting unit, the harvesting unit comprising a harvesting frame, a harvesting driver and a harvesting blade, the harvesting driver being fixed on the harvesting frame, the harvesting blade being rotatably arranged on the harvesting frame, the harvesting blade being able to contact with and cut off the tobacco plants, and the output end of the harvesting driver being transmission-connected to the harvesting blade; A conveying unit, one end of which is connected to the harvesting unit and is capable of conveying cut tobacco plants; The action unit, the harvesting unit and the transmission unit are both connected to the action unit, the action unit can drive the harvesting unit and the transmission unit to move in the vertical direction and the horizontal direction, the action unit adopts a connecting rod mechanism, and the action unit can be connected to the installation base.

2. The tobacco leaf harvesting device according to claim 1, characterized in that: The action unit includes a swing frame and an action connecting rod, the harvesting unit also includes a harvesting connecting rod, and the harvesting connecting rod is connected to the harvesting frame. The transmission unit includes a transmission frame. The swing frame, the action connecting rod, the harvesting connecting rod and the transmission frame are hinged in sequence to form a parallelogram connecting rod mechanism.

3. The tobacco leaf harvesting device according to claim 2, characterized in that: The action unit also includes a telescopic rod, one end of which is hinged to the swing frame, a hinge axis between the telescopic rod and the swing frame is parallel to a hinge axis between the swing frame and the conveying frame, the other end of the telescopic rod is hinged to the conveying frame, a hinge point between the telescopic rod and the conveying frame is located between the harvesting unit and the swing frame, the length of the telescopic rod is adjustable, and the telescopic rod, the swing frame and the conveying frame constitute a sliding guide rod mechanism.

4. The tobacco leaf harvesting device according to claim 2, characterized in that: The swing frame includes a fixed support, a swing support and a swing pin. The fixed support can be connected to the installation base. The swing support is hinged to the action connecting rod and the conveying frame. The swing support is connected to the swing pin. The fixed support has a mounting sleeve adapted to the swing pin. The swing pin is rotatably connected to the mounting sleeve. A wear-resistant sleeve is arranged between the swing pin and the mounting sleeve.

5. The tobacco leaf harvesting device according to claim 4, characterized in that: The fixed support is connected to a limit block, the limit block is located on one side of the swing pin, and the limit block can abut against the swing support to limit the relative rotation angle between the swing support and the fixed support; The swing support has a contact block matching the limit block, the limit block can abut against the contact block, and the limit block corresponds to the contact block one by one; The limiting block is movably connected to the fixed support.

6. The tobacco leaf harvesting device according to any one of claims 2 to 5, characterized in that: The harvesting frame is a U-shaped structure, and the cutting edge of the harvesting blade is located in the U-shaped groove of the harvesting frame to cut off the tobacco plants entering the U-shaped groove of the harvesting frame; the connection position between the harvesting blade and the harvesting frame can be adjusted, and the adjustment direction is parallel to the depth direction of the U-shaped groove of the harvesting frame; a protective cover is provided on the side of the harvesting blade close to the transmission unit, and the protective cover is connected to the harvesting frame; The harvesting unit also includes a guide frame, and the number of the guide frames is two groups. The two guide frames are respectively connected to the two sides of the U-shaped opening of the harvesting frame, and the spacing between the two guide frames gradually increases in the direction away from the harvesting blade, and the longitudinal cross-sectional area of ​​the guide frame gradually decreases in the direction away from the harvesting blade; the harvesting frame is also provided with a chip dropping hole, which is a through hole, and the chip dropping hole is located on the side of the harvesting blade away from the transmission unit.

7. The tobacco leaf harvesting device according to claim 3, characterized in that: The conveying unit further includes a conveying assembly, which includes a conveying driver, a conveying sprocket, a conveying chain and a conveying fork. The conveying driver is fixed on the conveying frame. The conveying sprockets are in two groups. The output end of the conveying driver is connected to one of the conveying sprockets. The two groups of conveying sprockets cooperate to tighten the conveying chain and drive the conveying chain to move. There are multiple groups of conveying forks, which are connected to the conveying chain and can clamp the cut tobacco plants. The conveying fork has a plurality of clamping branches at one end away from the conveying chain, wherein the clamping branches have clamping tips, and gaps are provided between adjacent clamping branches.

8. The tobacco leaf harvesting device according to claim 7, characterized in that: The number of the transmission components is two groups, the two groups of transmission components are symmetrically arranged with the center line of the harvesting unit as the axis, and the rotation directions of the transmission chains of the two groups of transmission components are opposite; The conveying assembly further comprises a tensioning mechanism, the tensioning mechanism is connected to the conveying frame, the tensioning mechanism is connected to one of the conveying sprockets, and can drive the conveying sprocket to move to tension the conveying chain; The conveying unit further comprises a first mounting frame, a second mounting frame and a mounting seat, wherein the first mounting frame, the second mounting frame and the mounting seat are all connected to the conveying frame and are located at a side of the conveying frame away from the conveying assembly, the first mounting frame is hinged to the swing frame, the second mounting frame is hinged to the harvesting connecting rod, and the mounting seat is hinged to the telescopic rod; The conveying frame is connected with a conveying cover plate, and the conveying cover plate and the conveying frame form a U-shaped groove structure, and the conveying chain is located in the space surrounded by the conveying cover plate and the conveying frame.

9. A harvester, comprising a travel platform, characterized in that: It also includes the tobacco leaf harvesting device according to any one of claims 1 to 8, wherein the tobacco leaf harvesting device is installed on the traveling platform, and the traveling platform can drive the tobacco leaf harvesting device to move.

10. The harvester according to claim 9, characterized in that: The number of the tobacco leaf harvesting devices is multiple groups, and the multiple groups of tobacco leaf harvesting devices are arranged in parallel on the traveling platform, and there are gaps between adjacent tobacco leaf harvesting devices; The tobacco leaf harvesting device is detachably connected to the traveling platform, and the connection position of the two can be adjusted.

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