Special mechanical device for stalked tobacco harvesting

Abstract

The utility model relates to a tobacco leaf harvesting technical field, especially a kind of special mechanical device of yellow tobacco stem harvesting. Including: vehicle frame chassis;Cutting table conveying mechanism, located at the front end of vehicle frame chassis, including two clamping conveying chains, clamping conveying chain is arranged on chain support frame, the front end of clamping conveying chain is equipped with chain adjusting part, chain adjusting part is connected with star wheel, star wheel is located above clamping conveying chain, the below of clamping conveying chain front end is equipped with shearing part, the rear end of clamping conveying chain is equipped with cutting table driving part, the rear portion of clamping conveying chain is rotatably connected with vehicle frame chassis, cutting table lifting oil cylinder is connected between clamping conveying chain and vehicle frame chassis. It improves the harvesting efficiency of yellow tobacco leaf, improves the mechanization degree in the process of yellow tobacco harvesting, reduces the labor intensity in the process of yellow tobacco harvesting.

Description

Technical Field

[0001] This utility model relates to the field of tobacco harvesting technology, and in particular to a special mechanical device for harvesting yellow tobacco with stems. Background Technology

[0002] Currently, most flue-cured tobacco is still harvested manually. Although some machines have been developed for flue-cured tobacco harvesting, both manual and machine harvesting methods typically involve picking individual leaves, resulting in high labor intensity and low efficiency, which cannot meet the requirements of the rapid development of the flue-cured tobacco industry. Summary of the Invention

[0003] The purpose of this utility model is to overcome the above-mentioned defects in the existing technology and to propose a special mechanical device for harvesting flue-cured tobacco with stems, which improves the harvesting efficiency of flue-cured tobacco leaves, increases the degree of mechanization in the flue-cured tobacco harvesting process, and reduces the labor intensity in the flue-cured tobacco harvesting process.

[0004] The technical solution of this utility model is: a special mechanical device for harvesting yellow tobacco with stems, comprising: Chassis frame; The cutting table conveying mechanism, located at the front end of the chassis, includes two clamping conveying chains. The clamping conveying chains are mounted on a chain support frame. The front end of the clamping conveying chains is equipped with a chain adjustment part, which is connected to a star wheel. The star wheel is located above the clamping conveying chains. A shearing part is located below the front end of the clamping conveying chains. The rear end of the clamping conveying chains is equipped with a cutting table drive part. The rear part of the clamping conveying chains is rotatably connected to the chassis. A cutting table lifting cylinder is connected between the clamping conveying chains and the chassis.

[0005] In this invention, each of the two clamping conveyor chains has a chain adjustment section at its front end; the chain adjustment section includes: The telescopic rod includes a movable rod and a fixed rod. The front end of the movable rod is connected to a first sprocket, and the rear end of the movable rod is slidably connected to the fixed rod. The movable rod and the fixed rod are connected by a screw, and the fixed rod is fixed to the chain support frame. A rotatable rod, one end of which is rotatably connected to a fixed rod, and the other end of which is connected to a second sprocket. Both the first sprocket and the second sprocket are in contact with the inner surface of the clamping conveyor chain. A star-shaped wheel is located above the chain adjustment section, and the star-shaped wheel and the second sprocket are coaxially arranged.

[0006] The shearing section includes: Two shear blades, rotating in opposite directions, and staggered vertically; Two drive shafts, with a shearing blade fixed at the upper end of the drive shaft and a sprocket fixed at the bottom end of the drive shaft. The drive shafts are rotatably mounted inside a fixed plate, which is fixedly connected to the chain support frame. The output shaft of the shearing motor is connected to the sprocket drive through the shearing blade chain drive unit, which transmits the power of the shearing motor to the sprocket and drive shaft.

[0007] Each clamping and conveying chain is equipped with a chain tensioning part; the chain tensioning part includes: The tensioning shaft has its inner end connected to the guide rail via a pin, and its outer end is movably set in the fixed sleeve. A compression spring is wound around the outer side of the tensioning shaft. The fixing sleeve is fixedly connected to the chain support frame; The guide rail contacts the clamping conveyor chain and exerts an inward pushing force on the clamping conveyor chain.

[0008] A header support is fixed on the chassis frame, and a header rotating part support is provided on the bottom surface of the rear part of the chain support frame. The header rotating part support and the header support are rotatably connected through the header rotating part; the header rotating part includes: The first bushing is cylindrical and is fixed to the cutting table support; The pivot is rotatably mounted within the first bushing; Fixed ear plates are provided on the outer sides of both ends of the first bushing. The fixed ear plates are fixedly connected to the bracket of the rotating part of the cutting table. The two ends of the rotating shaft are rotatably connected to the fixed ear plates.

[0009] The cutter head drive unit includes: A chain-driven motor, the output shaft of which is connected to the first sprocket drive shaft; The first sprocket drive shaft is connected to the two second sprocket drive shafts via bevel gear sets; The second sprocket drive shaft has a drive sprocket fixed at its top, and the drive sprocket is connected to the clamping and conveying chain drive.

[0010] The device also includes: The packaging control table is located below the rear end of the clamping conveyor chain. The loading bucket is located behind the packaging operating platform. The loading bucket is rotatably connected to the chassis. The rear of the loading bucket is connected to the chassis by a loading bucket unloading cylinder.

[0011] The loading bucket is rotatably connected to the chassis via a loading bucket rotating part; the loading bucket rotating part includes: The third bushing is cylindrical and is fixedly mounted on the chassis frame. The third rotating shaft is rotatably mounted inside the third bushing; The third fixed ear plate is provided on the outer side of both ends of the third bushing. The third fixed ear plate is fixedly connected to the loading bucket support. The loading bucket support is fixed on the bottom surface of the loading bucket. The two ends of the third rotating shaft are rotatably connected to the two third fixed ear plates respectively.

[0012] The chassis is equipped with symmetrical tracked walking mechanisms on both sides.

[0013] The beneficial effects of this utility model are: (1) The cutting platform conveying mechanism proposed in this application realizes the cutting of tobacco plants with stems and the conveying of the cut tobacco plants with stems. The stems and tops of the tobacco plants are conveyed and packaged at the same time, so as to realize the simultaneous weaving and curing of 5 to 6 tobacco leaves with stems, which improves the efficiency of weaving and curing, reduces labor costs, and solves the problems of difficult labor and low efficiency in tobacco harvesting. (2) The height of the shearing section is adjusted by the rotating part of the header and the lifting cylinder of the header proposed in this application, so that the header conveying mechanism can be adapted to tobacco plants of different heights and achieve the optimal shearing height of the tobacco plants, so as to realize the harvesting of tobacco plants of different heights. (3) The device simultaneously realizes the functions of machine walking, cutting and harvesting of tobacco plants with stems, conveying, packing and unloading. It can pick and pack all the mature tobacco leaves at the top of the tobacco plants with stems in one go, which greatly improves the harvesting efficiency of tobacco leaves. The mechanical harvesting force is uniform, which can reduce tobacco leaf damage and leaf drop, preserve the integrity of the tobacco stems, and avoid the bumps and damage caused by manual picking. The heating is more uniform during subsequent baking, which improves the grade and quality of the tobacco leaves after baking. Attached Figure Description

[0014] Figure 1 This is a first three-dimensional structural schematic diagram of the device described in this utility model; Figure 2 This is a second three-dimensional structural schematic diagram of the device described in this utility model; Figure 3 This is a third perspective structural diagram of the device described in this utility model; Figure 4 This is a schematic diagram of the back of the header conveyor mechanism; Figure 5 This is a schematic diagram of the header conveyor mechanism; Figure 6 This is a schematic diagram of the shear section; Figure 7 This is a schematic diagram of the cross-sectional structure of the shear section; Figure 8 This is a schematic diagram of the chain adjustment mechanism; Figure 9 This is a schematic diagram of the chain tensioning section; Figure 10 This is a schematic diagram of the rotating part of the cutting table; Figure 11 This is a cross-sectional structural diagram of the rotating part of the cutter head; Figure 12 This is a schematic diagram of the cutter head drive unit.

[0015] In the diagram: 1 Tracked walking mechanism; 2 Guardrail; 3 Chassis frame; 4 Loading bucket; 5 Packing operation platform; 6 Cab roof; 7 Header conveyor mechanism; 701 Header drive unit; 7011 Chain drive motor; 7012 First sprocket drive shaft; 7013 Second sprocket drive shaft; 7014 Drive sprocket; 702 Header rotating part bracket; 703 Header rotating part; 7031 Rotating shaft; 7032 First bushing; 7033 First bearing; 7034 Fixed lug; 7035 Bolt; 704 Header frame; 705 Shearing blade chain drive unit; 706 Shearing part; 7061 Sprocket; 7062 Second bushing; 7063 Fixed plate 7064 Shearing blade; 7065 Drive shaft; 7066 Second bearing; 707 Shearing motor; 708 Clamping conveyor chain; 709 Chain tensioning part; 710 Chain adjusting part; 711 Sprockets; 712 Star wheel; 713 Chain support frame; 8 Driving mechanism; 9 Gearbox assembly; 10 Engine; 11 Main oil pump; 12 Battery; 13 Hydraulic oil tank; 14 Cutting table support; 15 Right turn lever; 16 Left turn lever; 17 Seat; 18 Gearbox pulley; 19 Engine pulley; 20 Oil pump pulley; 21 Loading bucket unloading cylinder; 22 Loading bucket rotating part; 23 Loading bucket support; 24 Generator; 26 Cutting table lifting cylinder. Detailed Implementation

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0017] Specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention can be implemented in many ways other than those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] like Figures 1 to 3As shown, the special mechanical device for harvesting tobacco stalks according to this utility model includes a chassis 3. Two symmetrically arranged tracked walking mechanisms 1 are respectively provided on both sides of the chassis 3 along the direction of movement, enabling the entire device to move. A cutting platform conveying mechanism 7 and a driving mechanism 8 are provided at the front end of the chassis 3. The driver sits in the driving mechanism 8 and operates the movement of the entire device. The cutting platform conveying mechanism 7 is used to cut and convey the tobacco stalks. A baling operating platform 5 is provided in the middle of the chassis 3, and guardrails 2 are provided on the sides of the baling operating platform. A loading hopper 4 is provided at the rear of the chassis 3. The loading hopper 4 can be tilted, allowing the unloading of tobacco stalks during the tilting process.

[0019] An engine 10, a main oil pump 11, and a generator 24 are mounted on the chassis 3 below the packing platform 5. A battery 12 and a hydraulic oil tank 13 are mounted on the chassis 3 below the loading bucket 4. The main oil pump 11 is located at the outlet of the hydraulic oil tank 13. The main oil pump 11 draws hydraulic oil from the hydraulic oil tank 13 and delivers it to the various cylinders of the device. The electrical energy generated by the generator 24 is stored in the battery 12.

[0020] The tracked walking mechanism 1 includes an annular track and track drive wheels. The track drive wheels and the track are engaged with gears. The power generated by the engine 10 is transmitted to the track drive wheels through a belt drive mechanism, thereby driving the track to rotate and enabling the implement to move. The track has a large ground contact area, enabling it to travel smoothly on muddy and soft ground. It has strong adhesion, good passability, and is stable and durable in complex working conditions. It is also suitable for scenarios with narrow row spacing and uneven ground in tobacco fields, without crushing tobacco plants, and can flexibly shuttle and operate in tobacco fields.

[0021] like Figure 4 and Figure 5 As shown, the cutting table conveying mechanism includes two symmetrically arranged, closed-loop clamping conveying chains 708. A cutting table drive unit 701 is located at the rear end of each clamping conveying chain 708, providing power for the rotation of the clamping conveying chains. A shearing part 706 is located at the bottom of the front end of each clamping conveying chain 708. The shearing part cuts off tobacco plants with stems, which are then conveyed from the front end of the cutting table conveying mechanism to the rear end under the clamping action of the clamping conveying chains and fall onto the packaging operating table 5.

[0022] The rear of the clamping conveyor chain 708 is connected to the chassis 3 via a cutting table bracket 14. The bottom end of the cutting table bracket 14 is fixedly connected to the chassis 3, and the top of the cutting table bracket 14 is rotatably connected to the clamping conveyor chain 708. Simultaneously, a cutting table lifting cylinder 26 is connected between the bottom of the clamping conveyor chain 708 and the chassis 3. During the operation of the cutting table lifting cylinder 26, the clamping conveyor chain 708 rotates around its connection with the cutting table bracket, thereby achieving height adjustment of the clamping conveyor chain and the shearing section to accommodate tobacco plants of different heights and achieve the optimal shearing height for the tobacco plants.

[0023] In this embodiment, a cutting table rotating part bracket 702 and a cutting table rotating part 703 are provided at the connection between the clamping conveyor chain 708 and the cutting table bracket 14. The clamping conveyor chain 708 is disposed inside the chain support frame 713, and the cutting table rotating part bracket 702 is fixed to the bottom surface of the rear part of the chain support frame 713. The cutting table rotating part 703 is provided on the bottom surface of the cutting table bracket 702 facing the cutting table bracket.

[0024] like Figure 12 As shown, the header drive unit 701 includes a chain drive motor 7011. The output shaft of the chain drive motor 7011 is connected to a first sprocket drive shaft 7012. The first sprocket drive shaft 7012 is connected to two second sprocket drive shafts 7013 via bevel gear sets. A drive sprocket 7014 is fixed to the top of each of the second sprocket drive shafts 7013, and the two drive sprockets 7014 are connected to two clamping and conveying chains. The power generated by the chain drive motor 7011 is transmitted sequentially to the drive sprockets 7014 via the first sprocket drive shaft 7012 and the second sprocket drive shafts 7013, thereby driving the clamping and conveying chains to rotate and achieving the clamping and conveying of tobacco plants with stems.

[0025] like Figure 10 and Figure 11 As shown, the cutting table rotating part 703 includes a first bushing 7032, a rotating shaft 7031, and fixed ear plates 7034. The first bushing 7032 is cylindrical, with fixed ear plates 7034 at both ends. The first bushing 7032 is fixed to the cutting table support 14, and the two fixed ear plates 7034 are fixed to the cutting table rotating part support 702. The cavity of the first bushing 7032 contains a rotatable rotating shaft 7031, and both ends of the rotating shaft 7031 are rotatably connected to the fixed ear plates 7034. A first bearing 7033 is provided between the rotating shaft 7031 and the first bushing 7032. A limiting plate is fixed to one end of the rotating shaft 7031. In this embodiment, the rotating shaft and the limiting plate are an integral structure. The other end of the rotating shaft 7031 is connected to a bolt 7035. The limiting plate and the bolt 7035 are located on the outside of the cutting table rotating part support 702. The rotating shaft 7031 is limited by bolts 7035 and a limiting plate, ensuring the rotational connection between the rotating shaft and the support of the rotating part of the cutter table.

[0026] Each clamping and conveying chain is equipped with a chain tensioning section. For example... Figure 9 As shown, the chain tensioning section includes a tensioning shaft 7091 and a fixing sleeve 7093. The inner end of the tensioning shaft 7091 is connected to a guide rail 7095 via a pin 7094. The guide rail exerts an inward pushing force on the clamping conveyor chain. The outer end of the tensioning shaft 7091 is movably disposed within the fixing sleeve 7093, which is fixedly connected to the chain support frame 713. A compression spring 7092 is wound around the annular outer side of the tensioning shaft 7091.

[0027] The clamping conveyor chains on both sides, driven by the guide rails, exert a clamping force on the tobacco plants with stems that enter between the clamping conveyor chains. After being clamped by the clamping conveyor chains, the tobacco plants with stems move from the front end to the rear end of the header conveyor mechanism as the clamping conveyor chains rotate.

[0028] Both clamping conveyor chains have a chain adjustment section 710 at their front ends. For example... Figure 8 As shown, the chain adjustment unit includes a telescopic rod 7101 and a rotatable rod 7102, which are rotatably connected. The telescopic rod 7101 includes a movable rod and a fixed rod. The front end of the movable rod is connected to a first sprocket 7103, which contacts the inner surface of the conveyor chain. The rear end of the movable rod is located inside the fixed rod, and the movable rod and the fixed rod are slidably connected. The fixed rod is fixedly mounted on the chain support frame 713. The movable rod and the fixed rod are connected by a lead screw. During the rotation of the lead screw, the movable rod reciprocates, realizing the relative movement between the movable rod and the fixed rod.

[0029] One end of the rotatable rod 7102 is rotatably connected to the rear of the fixed rod, and the other end of the rotatable rod 7102 is connected to a second sprocket 7104, which contacts the inner surface of the clamping conveyor chain. The rotatable rod 7102 and the telescopic rod 7101 are set at a certain angle, and the angle between the rotatable rod 7102 and the telescopic rod 7101 is adjustable. After the angle of the rotatable rod 7102 is adjusted to the correct position, the position of the rotatable rod is fixed by bolts and nuts.

[0030] By adjusting the length of the telescopic rod 7101 and the angle between the rotatable rod and the telescopic rod, the positions of the first sprocket 7103 and the second sprocket 7104 connected to the telescopic rod are adjusted so that the clamping conveyor chain can always be kept taut.

[0031] Meanwhile, a star-shaped wheel 712 is connected to the chain adjustment section at the front end of one of the clamping conveyor chains. The star-shaped wheel 712 is coaxially arranged with the second sprocket 7104, and the star-shaped wheel 712 is located above the second sprocket 7104. During the rotation of the clamping conveyor chain 708, the second sprocket 7104 is always rotating due to the meshing between the clamping conveyor chain and the second sprocket. The second sprocket 7104 drives the star-shaped wheel 712, which is coaxially arranged with it, to rotate. During the rotation of the star-shaped wheel 712, the teeth on its outer surface can continuously push the seedlings with stems between the two clamping conveyor chains.

[0032] A shearing section 706 is located at the bottom of the front end of the clamping conveyor chain. The shearing section is connected to the shearing motor 707 via a shearing blade chain drive section 705, which includes a drive chain. The power generated when the shearing motor 707 operates is transmitted to the shearing section 706 through the shearing blade chain drive section 705, driving the shearing blades in the shearing section 706 to rotate. During the rotation of the shearing blades, the tobacco plants with stems are cut.

[0033] like Figure 6 and Figure 7 As shown, the shearing part 706 includes a fixed plate 7063, a drive shaft 7065, and two shearing blades 7064 arranged vertically and horizontally. The drive shafts 7065 are fixed to the middle parts of the two shearing blades 7064 respectively. The drive shafts 7065 are rotatably arranged inside the fixed plate 7063. The fixed plate 7063 is fixedly connected to the chain support frame 713.

[0034] In this embodiment, a shearing blade 7064 is fixedly connected to the top end of the drive shaft 7065, and the shearing blade 7064 is located below the clamping conveyor chain. A sprocket 7061 is fixed to the bottom end of the drive shaft 7065. The sprocket 7061 is in contact with the transmission chain of the shearing blade chain drive unit. The transmission chain is simultaneously wound around the drive sprocket at the output end of the shearing motor and the outside of the sprocket 7061 connected to the two shearing blades. The output power of the shearing motor is transmitted to the sprocket 7061 through the transmission chain, driving the sprocket 7061 and the shearing blade 7064 connected to the sprocket to rotate. The two shearing blades, which are arranged alternately up and down, cut the tobacco plants with stems in the process of rotating in opposite directions.

[0035] The drive shaft 7065 is rotatably mounted inside the second bushing 7062, and the second bushing 7062 is fixedly mounted inside the fixed plate 7063. The drive shaft 7065 and the second bushing 7062 are rotatably connected through the second bearing 7066.

[0036] During the operation of the header conveyor mechanism, the two symmetrically arranged clamping conveyor chains first rotate under the power output from the header drive unit. As the star wheel 712 moves the tobacco plants with stems to the two clamping conveyor chains, the shearing part 706 at the front end of the clamping conveyor chains actuates, cutting the stems of the tobacco plants at a suitable height. The cut tobacco plants with stems are then conveyed from the front end to the rear end of the clamping conveyor chains as the chains rotate, under the clamping action of the two clamping conveyor chains.

[0037] A baling operating platform 5 is located behind the cutting platform conveyor, and a loading hopper 4 is located behind the baling operating platform 5. After the cut tobacco plants with stems are conveyed and fall onto the operating platform 5, the tobacco plants with stems are manually baled and placed into the loading hopper 4.

[0038] The rear of the loading bucket 4 is rotatably connected to the chassis 3 via a loading bucket rotating part 22. The structure of the loading bucket rotating part 22 is the same as that of the cutting table rotating part, so it will not be described again here. The third bushing of the loading bucket rotating part 22 is fixedly connected to the chassis 3. A third rotating shaft rotates inside the third bushing. Third fixed lugs are provided on the outer sides of both ends of the third bushing. The two ends of the third rotating shaft are rotatably connected to the third fixed lugs. The third fixed lugs are fixedly connected to the loading bucket bracket 23 fixed to the bottom surface of the loading bucket. The cylinder body of the loading bucket unloading cylinder 21 is rotatably connected to the chassis 3, and the piston rod of the loading bucket unloading cylinder 21 is rotatably connected to the bottom surface of the rear of the loading bucket. During the operation of the loading bucket unloading cylinder 21, it drives the loading bucket 4 to rotate around the rotatable connection between it and the chassis 3.

[0039] When the loading hopper 4 is full, the loading hopper unloading cylinder 21 is activated, and its piston rod extends, causing the loading hopper 4 to rotate to an inclined state. At this time, the tobacco plants with stems in the loading hopper 4 are unloaded, thus achieving unloading. Subsequently, the piston rod of the loading hopper unloading cylinder 21 retracts, and the loading hopper 4 rotates to a horizontal state, allowing the packaged tobacco plants with stems to continue to be placed into the loading hopper.

[0040] The driving mechanism 8 includes a seat 17, a left turn lever 16 and a right turn lever 15. The driver sits in the seat 17 and controls the direction of the device by using the left turn lever 16 and the right turn lever 15.

[0041] The device also includes a power transmission mechanism, which comprises an engine pulley 19, a gearbox pulley 18, and an oil pump pulley 20. The engine pulley 19 is connected to the output shaft of the engine 10, the gearbox pulley 18 is connected to the power input shaft of the gearbox assembly 9, and the oil pump pulley 20 is connected to the power input shaft of the main oil pump 11. The engine pulley 19 and gearbox pulley 18, and the engine pulley 19 and oil pump pulley 20, are respectively connected by belt drives. During engine operation, the engine 10 drives the gearbox assembly 9 and the main oil pump 11 to operate.

[0042] The working principle of this device is as follows. When the tobacco plants are mature and harvested, after the bottom leaves have been picked, only 5 to 6 leaves remain at the top. This device can be used to cut the tobacco plant with the stem in one go, so as to harvest all the mature leaves at the top of the plant with the stem, and complete the picking and packing of all the tobacco leaves.

[0043] During harvesting, by manipulating the movement direction of the device, the tobacco plants with stems to be harvested are positioned in front of the two clamping conveyor chains. Driven by the star-shaped wheel 712, the tobacco plants with stems are moved between the two clamping conveyor chains. Simultaneously, the shearing section below the clamping conveyor chains activates, using alternating vertical and reverse rotating shearing blades to cut the tobacco plants with stems at a suitable height. The cut tobacco plants, held by the clamping conveyor belts on both sides, are transported to the rear and finally fall onto the baling operating table 5. After baling the tobacco plants with stems, the workers place them into the loading hopper 4.

[0044] After the loading bucket 4 is full, the loading bucket 4 is rotated to unload the material by the loading bucket unloading cylinder 21. After unloading, the loading bucket 4 can be put back into the subsequent packing and loading work.

[0045] During actual harvesting, the height of the shearing section can be adjusted using the lifting cylinder 26 of the header according to the different heights of the tobacco plants, so as to achieve the optimal shearing height of the tobacco plants.

[0046] The above provides a detailed description of the special mechanical device for harvesting yellow tobacco with stems provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model. The above description of the disclosed embodiments enables those skilled in the art to implement or use this utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this utility model. Therefore, this utility model is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A special mechanical device for harvesting flue-cured tobacco with stems, characterized in that, include: Chassis frame; The cutting table conveying mechanism, located at the front end of the chassis, includes two clamping conveying chains. The clamping conveying chains are mounted on a chain support frame. The front end of the clamping conveying chains is equipped with a chain adjustment part, which is connected to a star wheel. The star wheel is located above the clamping conveying chains. A shearing part is located below the front end of the clamping conveying chains. The rear end of the clamping conveying chains is equipped with a cutting table drive part. The rear part of the clamping conveying chains is rotatably connected to the chassis. A cutting table lifting cylinder is connected between the clamping conveying chains and the chassis.

2. The special mechanical device for harvesting flue-cured tobacco with stems according to claim 1, characterized in that, Both clamping conveyor chains have a chain adjustment section at their front ends; the chain adjustment section includes: The telescopic rod includes a movable rod and a fixed rod. The front end of the movable rod is connected to a first sprocket, and the rear end of the movable rod is slidably connected to the fixed rod. The movable rod and the fixed rod are connected by a screw, and the fixed rod is fixed to the chain support frame. A rotatable rod, one end of which is rotatably connected to a fixed rod, and the other end of which is connected to a second sprocket. Both the first sprocket and the second sprocket are in contact with the inner surface of the clamping conveyor chain. A star-shaped wheel is located above the chain adjustment section, and the star-shaped wheel and the second sprocket are coaxially arranged.

3. The special mechanical device for harvesting flue-cured tobacco with stems according to claim 1, characterized in that, The shearing section includes: Two shear blades, rotating in opposite directions, and staggered vertically; Two drive shafts, with a shearing blade fixed at the upper end of the drive shaft and a sprocket fixed at the bottom end of the drive shaft. The drive shafts are rotatably mounted inside a fixed plate, which is fixedly connected to the chain support frame. The output shaft of the shearing motor is connected to the sprocket drive through the shearing blade chain drive unit, which transmits the power of the shearing motor to the sprocket and drive shaft.

4. The special mechanical device for harvesting flue-cured tobacco with stems according to claim 1, characterized in that, Each clamping and conveying chain is equipped with a chain tensioning part; the chain tensioning part includes: The tensioning shaft has its inner end connected to the guide rail via a pin, and its outer end is movably set in the fixed sleeve. A compression spring is wound around the outer side of the tensioning shaft. The fixing sleeve is fixedly connected to the chain support frame; The guide rail contacts the clamping conveyor chain and exerts an inward pushing force on the clamping conveyor chain.

5. The special mechanical device for harvesting flue-cured tobacco with stems according to claim 1, characterized in that, A header support is fixed on the chassis frame, and a header rotating part support is provided on the bottom surface of the rear part of the chain support frame. The header rotating part support and the header support are rotatably connected through the header rotating part; the header rotating part includes: The first bushing is cylindrical and is fixed to the cutting table support; The rotating shaft is rotatably mounted inside the first bushing; Fixed ear plates are provided on the outer sides of both ends of the first bushing. The fixed ear plates are fixedly connected to the bracket of the rotating part of the cutting table. The two ends of the rotating shaft are rotatably connected to the fixed ear plates.

6. The special mechanical device for harvesting flue-cured tobacco with stems according to claim 1, characterized in that, The cutter head drive unit includes: A chain-driven motor, the output shaft of which is connected to the first sprocket drive shaft; The first sprocket drive shaft is connected to the two second sprocket drive shafts via bevel gear sets; The second sprocket drive shaft has a drive sprocket fixed at its top, and the drive sprocket is connected to the clamping and conveying chain drive.

7. The special mechanical device for harvesting flue-cured tobacco with stems according to claim 1, characterized in that, The device also includes: The packaging control table is located below the rear end of the clamping conveyor chain. The loading bucket is located behind the packaging operation platform. The loading bucket is rotatably connected to the chassis. The rear of the loading bucket is connected to the chassis by a loading bucket unloading cylinder.

8. The special mechanical device for harvesting flue-cured tobacco with stems according to claim 7, characterized in that, The loading bucket is rotatably connected to the chassis via a loading bucket rotating part; the loading bucket rotating part includes: The third bushing is cylindrical and is fixedly mounted on the chassis frame. The third rotating shaft is rotatably mounted inside the third shaft sleeve; The third fixed ear plate is provided on the outer side of both ends of the third bushing. The third fixed ear plate is fixedly connected to the loading bucket support. The loading bucket support is fixed on the bottom surface of the loading bucket. The two ends of the third rotating shaft are rotatably connected to the two third fixed ear plates respectively.

9. The special mechanical device for harvesting flue-cured tobacco with stems according to claim 7, characterized in that, The chassis is equipped with symmetrical tracked walking mechanisms on both sides.

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