A contouring harvester for high-stalk crops

Abstract

The application provides a harvesting machine which can perform bidirectional operation, the root cutting device can realize profile cutting, the root cutting effect is improved, and the operation efficiency is improved.

Description

Technical Field

[0001] This invention relates to agricultural machinery, and more particularly to an agricultural harvesting machine. Background Technology

[0002] Existing harvesting machinery for tall, stalked crops operates in a unidirectional manner. After completing one row, the harvesting machine must reverse back to the end of the field to continue the operation. Due to the repetitive actions caused by unidirectional operation, the harvesting efficiency is extremely low.

[0003] The root-cutting devices of existing harvesting machinery for tall crops are fixedly installed. However, due to uneven field roads, the height of these devices fluctuates. Because the distance between the root-cutting device and the ground is fixed, the stubble height left after root cutting is unstable. Furthermore, with varying terrain, the rate of top breakage in tall crops is high, resulting in poor machine harvesting efficiency. Summary of the Invention

[0004] This invention provides a bidirectional contour-following harvesting machine for tall crops, aiming to overcome the shortcomings of existing technologies and provide a harvesting machine that can perform bidirectional operations, has a root-cutting device that can achieve contour-following cutting, improves root-cutting effect, and increases operating efficiency.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A bidirectional contour-following harvesting machine for tall, stalked crops, characterized by:

[0007] Includes power input device, cutting device and power transmission device;

[0008] The frame of the power input device is connected to the central cutting platform body of the cutting device by a cutting platform connecting frame. The cutting platform connecting frame is a parallel four-bar linkage mechanism. The upper front end and the lower front end of the parallel four-bar linkage mechanism are respectively hinged to the central cutting platform body, and the upper right end and the lower right end are respectively hinged to the frame.

[0009] The root cutting device in the cutting and laying device is fixedly installed on the main body of the central cutting platform;

[0010] The engine of the power input device is connected to the power transmission device and drives the blade of the root cutting device.

[0011] The cutter frame consists of two parallel four-bar linkages located on both sides of the chassis.

[0012] The root cutting device includes a bevel gearbox, a coaxial reversing gearbox, an upper cutter head, a lower cutter head, a central spindle, and cutting blades;

[0013] The engine of the power input device is connected to the gearbox;

[0014] The power transmission device includes a large sprocket, a chain, and a small sprocket; the large sprocket is assembled with the output shaft on the gearbox of the power input device, the small sprocket is assembled with the input shaft on the bevel gearbox of the root cutting device, and the chain is assembled on the large sprocket and the small sprocket;

[0015] The output shaft of the bevel gearbox is connected to the central spindle, which is connected to the coaxial reverse gearbox. The output shaft of the coaxial reverse gearbox is equipped with the upper cutter head, the lower cutter head, and the upper and lower cutter heads are equipped with cutting tools.

[0016] The bevel gearbox and the coaxial reversible gearbox are fixedly mounted on the central cutting table body.

[0017] The lower right and lower left sliding plates are fixed at the lower end of the central cutting platform.

[0018] The left and right vertical shafts are fixed to both sides of the central cutting table body by bearing seats;

[0019] The primary drive chain is wound around the left sprocket and the right sprocket. The left sprocket is fixed on the left vertical shaft, and the right sprocket is fixed on the right vertical shaft.

[0020] The secondary drive chain is wound around the left second sprocket, the middle second sprocket, and the right second sprocket. The left second sprocket is fixed on the left vertical shaft, the middle second sprocket is fixedly installed on the central main shaft of the root cutting device, and the right second sprocket is fixed on the right vertical shaft.

[0021] The primary drive chain is equipped with primary chain teeth, and the secondary drive chain is equipped with secondary chain teeth.

[0022] The first and second sprockets on the left and right are located above the bevel gearbox; the second sprocket on the left, the second sprocket in the middle, and the second sprocket on the right are located below the bevel gearbox and above the coaxial reversing gearbox.

[0023] The lower left and upper left guide vanes are fixed to the central cutting platform body; the front part of the inward-facing side of the lower left and upper left guide vanes are inclined plates from the outside to the inside; the lower right and upper right guide vanes are fixed to the central cutting platform body; the front part of the inward-facing side of the lower right and upper right guide vanes are inclined plates from the outside to the inside.

[0024] The left derailleur includes a horizontal chain wound around two sprockets, with left derailleur teeth mounted on the chain. The drive sprocket is fixedly mounted on and driven by the left vertical shaft, while the driven sprocket is pivotally mounted on the left derailleur plate, which is hinged to the left vertical shaft. The left derailleur wheel is a horizontal wheel with teeth, pivotally mounted on the top of an axle, the bottom of which is rotatably fitted onto the central cutter body. A derailleur channel is formed between the left derailleur and the left derailleur wheel.

[0025] The right derailleur includes a horizontal chain wound around two sprockets, with right derailleur teeth mounted on the chain. The drive sprocket is fixedly mounted on and driven by the right vertical shaft, while the driven sprocket is pivotally mounted on the right derailleur plate, which is hinged to the right vertical shaft. The right derailleur wheel is a horizontal wheel with teeth, pivotally mounted on the top of a curved axle, the bottom of which is rotatably fitted onto the central cutter body. A derailleur channel is formed between the right derailleur and the right derailleur wheel.

[0026] The advantages of this invention are:

[0027] During operation, this invention allows for bidirectional operation: the left derailleur and left wheel can be unfolded while the right derailleur and right wheel are folded. The left derailleur teeth and left wheel teeth work together for actuation, or the left derailleur and left wheel can be folded while the right derailleur and right wheel are unfolded. This achieves bidirectional operation, improving efficiency and reducing the workload for farmers compared to the unidirectional operation of existing technologies. The connection and movement of the header frame enable the entire cutting device to operate in a terrain-following manner, ensuring the root-cutting device remains at the same height as the ground for contour-following cutting and improved root-cutting effect. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] Figure 1 This is a schematic diagram of the bidirectional harvesting mechanism for tall crops according to the present invention;

[0030] Figure 2 This is a schematic diagram of the power input device of the present invention;

[0031] Figure 3 This is a top view schematic diagram of the cutting and laying device of the present invention;

[0032] Figure 4 This is a side view of the cutting and laying device of the present invention;

[0033] Figure 5 This is a schematic diagram of the root cutting device of the present invention;

[0034] Figure 6 This is a schematic diagram of the central cutting platform of the present invention;

[0035] Figure 7 This is a schematic diagram of the central cutting platform of the present invention from the right.

[0036] Figure 8 This is a front view schematic diagram of the central cutting platform of the present invention;

[0037] Figure 9 This is a schematic diagram of the first-stage transmission chain of the present invention;

[0038] Figure 10 This is a schematic diagram of the first-stage transmission chain of the present invention;

[0039] Figure 11 This is a schematic diagram of the power transmission device of the present invention.

[0040] Numbering on the map:

[0041] 1. Power input device; 2. Cutting device; 3. Power transmission device; 4. Frame; 5. Engine; 6. Wheels; 7. Battery; 8. Gearbox; 9. Handlebars; 10. Gear shift lever; 11. Left derailleur; 12. Undercutting device; 13. Central cutting table; 14. Right derailleur; 15. Right derailleur wheel; 16. Left derailleur wheel; 17. Lower right deflector; 18. Upper right deflector; 19. Lower left deflector; 20. Upper left deflector; 21. Bevel gearbox; 22. Coaxial reversible gearbox; 23. Upper cutter head; 24. Lower cutter head; 25. Upper support plate; 26. Cutting table connecting frame; 27. Lower right slide plate; 28. 29. Lower right slide bracket; 30. Lower right support plate; 31. Right support rod; 32. Root cutter support plate; 33. Lower left slide; 34. Lower left slide bracket; 35. Lower left support plate; 36. Left support rod; 37. Secondary drive chain; 38. Middle support plate; 39. Primary drive chain; 40. Upper right column; 41. Right vertical shaft; 42. Lower right column; 43. Left vertical shaft; 44. Lower left column; 45. Upper left column; 46. Left first sprocket; 47. Primary chain sprocket; 48. Right first sprocket; 49. Left second sprocket; 50. Secondary chain sprocket; 51. Middle second sprocket; 52. Right second sprocket; 53. Central spindle. Detailed Implementation

[0042] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort. To facilitate understanding of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0043] It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "bottom," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] like Figure 1 As shown:

[0045] This invention is a harvesting machine for bidirectional cutting and spreading of tall crops, comprising a power input device 1, a cutting and spreading device 2, and a power transmission device 3.

[0046] like Figure 2 As shown:

[0047] The power input device 1 includes a frame 4, an engine 5, wheels 6, a battery 7, a gearbox 8, and handlebars 9 mounted on the frame 4, and a gear shift lever 10 connected to the gearbox 8.

[0048] Battery 7 is connected to engine 5, and engine 5 is connected to gearbox 8.

[0049] The power input device 1 starts the engine 5 via the battery 7, and controls the gear shift lever 10 to achieve the gear shifting and forward / reverse functions of the gearbox 8. The handlebars 9 control the forward, backward, left, and right turns of the power input device 1. The wheels 6 are arranged in a double row to improve the grip of the power input device 1 and prevent slippage and tipping.

[0050] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 As shown:

[0051] The cutting device 2 includes a left derailleur chain 11, a root cutting device 12, a central cutting platform 13, a right derailleur chain 14, a right derailleur wheel 15, a left derailleur wheel 16, a lower right guide plate 17, an upper right guide plate 18, a lower left guide plate 19, and an upper left guide plate 20.

[0052] The cutting device 2 is the main working component of this invention. The left derailleur 11, root cutting device 12, right derailleur 14, right derailleur 15, left derailleur 16, lower right guide plate 17, upper right guide plate 18, lower left guide plate 19 and upper left guide plate 20 are all installed on the central cutting table 13.

[0053] The left derailleur 11 includes a horizontal chain wound around two sprockets, with left derailleur teeth mounted on the chain. The driving sprocket is fixedly mounted on and driven by the left vertical shaft 42, while the driven sprocket is pivotally mounted on the left derailleur plate, which is hinged to the left vertical shaft 42. Thus, the left derailleur plate can rotate horizontally about the left vertical shaft 42, allowing the entire left derailleur 11 to unfold outwards or fold inwards. Figure 3 , Figure 4 This refers to the left derailleur 11 being in the unfolded state.

[0054] The right derailleur 14 includes a horizontal chain wound around two sprockets, with right derailleur teeth mounted on the chain. The drive sprocket is fixedly mounted on and driven by the right vertical shaft 40, while the driven sprocket is pivotally mounted on the right derailleur plate, which is hinged to the right vertical shaft 40. Thus, the right derailleur plate can rotate horizontally about the right vertical shaft 40, allowing the entire right derailleur 14 to unfold outwards or fold inwards. Figure 3 , Figure 4 This refers to the right derailleur 14 being in the folded position.

[0055] The lower left guide vane 19 and the upper left guide vane 20 are fixed to the left support rod 35 and reinforced by reinforcing ribs. The front part of the inward (and rightward) side of the lower left guide vane 19 and the upper left guide vane 20 are both inclined plates that slope from the outside to the inside.

[0056] The lower right guide vane 17 and the upper right guide vane 18 are fixed to the right support rod 30 and are connected and reinforced by reinforcing ribs. The front part of the inward (and leftward) side of the lower right guide vane 17 and the upper right guide vane 18 are both inclined plates that slope from the outside to the inside.

[0057] In this way, the lower left guide plate 19 and the upper left guide plate 20, the lower right guide plate 17 and the upper right guide plate 18 form a guide channel with a flared opening at the front of the cutting and laying device 2.

[0058] The left shifter 16 is a horizontally positioned wheel with shift teeth, pivotally mounted on the top of a curved axle. The bottom end of the axle is rotatably fitted onto the left support rod 35, thus allowing the left shifter 16 to be unfolded or folded by rotating the axle. Figure 3 , Figure 4 This refers to the unfolded state of the left derailleur 16. The unfolding or folding angle of the left derailleur 16 is within the range of 90°, which is limited by the fact that the axle of the left derailleur 16 will abut against the upper left guide plate 20 after it has been rotated to the correct position.

[0059] The right shifter 15 is a horizontally positioned wheel with shift teeth, pivotally mounted on the top of a curved axle. The bottom end of the axle is rotatably fitted onto the right support rod 30, thus allowing the right shifter 15 to be unfolded or folded by rotating the axle. Figure 3 , Figure 4 This refers to the right derailleur 15 in its unfolded state. The right derailleur 15 can be unfolded or folded within a range of 90°, which is limited by the fact that the axle of the right derailleur 15 will press against the upper right guide plate 18 after it has been rotated to its final position.

[0060] During normal operation, the left derailleur chain 11 and left derailleur wheel 16 are unfolded, while the right derailleur chain 14 and right derailleur wheel 15 are folded (e.g., Figure 3 , Figure 4 (As shown in the diagram). At this time, a shifting channel is formed between the left derailleur 11 and the left derailleur 16. The left derailleur 11 rotates actively, and the left derailleur 16 rotates passively. The left derailleur teeth of the left derailleur 11 and the derailleur teeth of the left derailleur 16 cooperate to perform the shifting operation.

[0061] When operating in reverse, the left derailleur chain 11 and the left derailleur wheel 16 are folded, while the right derailleur chain 14 and the right derailleur wheel 15 are unfolded.

[0062] Alternatively, during normal operation, the right derailleur 14 and right derailleur 15 are extended, while the left derailleur 11 and left derailleur 16 are folded. During reverse operation, the right derailleur 14 and right derailleur 15 are folded, while the left derailleur 11 and left derailleur 16 are extended.

[0063] The above structure enables bidirectional operation, which improves operation efficiency compared to the unidirectional operation of existing technologies.

[0064] like Figure 5 As shown:

[0065] The root cutting device 12 includes a bevel gearbox 21, a coaxial reversing gearbox 22, an upper cutter head 23, a lower cutter head 24, and a central spindle 52.

[0066] A small sprocket 56 of the power transmission device 3 is installed on the input shaft of the bevel gearbox 21. The output shaft of the bevel gearbox 21 is connected to the central main shaft 52, which is connected to the coaxial reversing gearbox 22. The upper cutter head 23 and the lower cutter head 24 are installed on the output shaft of the coaxial reversing gearbox 22. The blades installed on the upper cutter head 23 and the lower cutter head 24 perform the root cutting function.

[0067] like Figure 6 , Figure 7 , Figure 8 As shown:

[0068] The central cutting table 13 includes an upper support plate 25, a cutting table connecting frame 26, a lower right slide plate 27, a lower right slide plate bracket 28, a lower right support plate 29, a right support rod 30, a root cutter support plate 31, a lower left slide plate 32, a lower left slide plate bracket 33, a lower left support plate 34, a left support rod 35, a secondary drive chain 36, a middle support plate 37, a primary drive chain 38, an upper right column 39, a right vertical shaft 40, a lower right column 41, a left vertical shaft 42, a lower left column 43, and an upper left column 44.

[0069] The central cutting platform 13 is mainly composed of four columns welded together: upper support plate 25, middle support plate 37, lower left support plate 34, lower right support plate 29, upper right column 39, lower right column 41, lower left column 43, and upper left column 44.

[0070] The root cutter support plate 31 is fixed below the middle support plate 37. The coaxial reverse gear box 22 is fixed on the root cutter support plate 31 and located below the middle support plate 37. The bevel gear box 21 is fixed on the upper surface of the middle support plate 37. The central spindle 52 passes through the through hole of the middle support plate 37 and is connected to the coaxial reverse gear box 22.

[0071] The cutter head connecting frame 26 consists of two parallel four-bar linkages, located on opposite sides of the frame 4. For example... Figure 7 The diagram shows the parallel four-bar linkage on the right. The upper front end of this linkage is hinged to the middle support plate 37, the lower front end to the lower right support plate 29, and the upper and lower rear ends to the front ends of the frame 4. The parallel four-bar linkage on the left (not shown) is also shown. Its upper front end is hinged to the middle support plate 37, its lower front end to the lower left support plate 34, and its upper and lower rear ends to the front ends of the frame 4. Thus, the central cutting platform 13 is connected to the frame 4 via the cutting platform connecting frame 26, meaning the paving device 2 is also connected to the frame 4 via the cutting platform connecting frame 26. When the frame 4 moves forward and backward, the parallel four-bar linkage of the cutting platform connecting frame 26 keeps the paving device 2 in contact with the ground, achieving terrain-following operation.

[0072] The lower right slide plate 27 is fixed to the lower right support plate 29 by the lower right slide plate bracket 28 and the right support rod 30, and the lower left slide plate 32 is fixed to the lower left support plate 34 by the lower left slide plate bracket 33 and the left support rod 35.

[0073] During operation, the lower right slide 27 and the lower left slide 32 contact the ground, supporting the entire central cutting platform 13. At the same time, the movement of the cutting platform connecting frame 26 enables the entire cutting device 2 to perform terrain-following operation, allowing the root cutting device 12 to maintain the same height as the ground and achieve contour cutting.

[0074] like Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 As shown:

[0075] The primary drive chain 38 is wound around the left sprocket 45 and the right sprocket 47. The left sprocket 45 is fixed on the left vertical shaft 42, and the right sprocket 47 is fixed on the right vertical shaft 40 and is located between the upper support plate 25 and the middle support plate 37.

[0076] The secondary transmission chain 36 is wound around the left second sprocket 48, the middle second sprocket 50, and the right second sprocket 51, including: the left second sprocket 48 is fixed on the left vertical shaft 42, the middle second sprocket 50 is fixedly installed on the central main shaft 52 of the root cutting device 12, and the right second sprocket 51 is fixed on the right vertical shaft 40 and located between the middle support plate 37 and the left lower support plate 34 and the right lower support plate 29.

[0077] To prevent interference between components, the left sprocket 45 and right sprocket 47, which mate with the primary drive chain 38, are fixed above the bevel gearbox 21. The left second sprocket 48, the middle second sprocket 50, and the right second sprocket 51, which mate with the secondary drive chain 36, are fixed below the bevel gearbox 21 and above the coaxial reversing gearbox 22. The left sprocket 45 and left second sprocket 48 are fixedly mounted on the left vertical shaft 42, and the right sprocket 47 and right second sprocket 51 are fixedly mounted on the right vertical shaft 40. The middle second sprocket 50 is fixedly mounted on the central main shaft 52.

[0078] The left vertical shaft 42 and the right vertical shaft 40 are fixed on both sides of the central cutting table 13 by bearing seats. The left vertical shaft 42 passes through the upper support plate 25, the middle support plate 37 and the lower left support plate 34, and the right vertical shaft 40 passes through the upper support plate 25, the middle support plate 37 and the lower right support plate 29.

[0079] The primary drive chain 38 is evenly equipped with primary chain teeth 46, and the secondary drive chain 36 is evenly equipped with secondary chain teeth 49.

[0080] The left vertical shaft 42 is connected to the left derailleur 11. The right vertical shaft 40 is connected to the right derailleur 14.

[0081] like Figure 11 As shown:

[0082] The power transmission device 3 includes a large sprocket 53, a chain 54, a tensioner 55, and a small sprocket 56. The large sprocket 53 is assembled with the output shaft on the gearbox 8, the small sprocket 56 is assembled with the input shaft on the bevel gearbox 21, and the chain 54 is assembled on the large sprocket 53 and the small sprocket 56. The tensioner 55 is installed between the large sprocket 53 and the small sprocket 56 to tension the chain 54.

[0083] During work:

[0084] The power of engine 5 is transmitted through gearbox 8, large sprocket 54, chain 54, small sprocket 56, bevel gearbox 21, central main shaft 52, coaxial reversing gearbox 22, upper cutter head 23, and lower cutter head 24, ultimately driving the blade of root cutting device 12 to rotate.

[0085] The central spindle 52 drives the second sprocket 50 to rotate, which in turn drives the second sprocket 51 to rotate via the secondary transmission chain 36. The second sprocket 51, in turn, drives the first transmission chain 38 via the right vertical shaft 40, simultaneously rotating the right derailleur chain 14. Power is transmitted from the first transmission chain 38 to the left vertical shaft 42 via the left sprocket 45, and then from the left vertical shaft 42 to the left derailleur chain 11. The first transmission chain 38 and the second transmission chain 36 are arranged in parallel, with the first-stage chain teeth 46 and the second-stage chain teeth 49 corresponding one-to-one. After cutting the roots of tall crops, the crops are pulled out by the first-stage chain teeth 46 and the second-stage chain teeth 49, achieving a cutting and spreading effect.

[0086] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention 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 contour-following harvesting machine for bidirectional cutting of tall-stalked crops, characterized in that: It includes a power input device, a cutting device, and a power transmission device; the frame of the power input device is connected to the central cutting platform body of the cutting device by a cutting platform connecting frame, which is a parallel four-bar linkage mechanism. The upper front and lower front ends of the parallel four-bar linkage mechanism are respectively hinged to the central cutting platform body, and the upper right and lower right ends are respectively hinged to the frame; the root cutting device in the cutting device is fixedly installed on the central cutting platform body; the engine of the power input device is connected to and drives the blade of the root cutting device by a power transmission device; the central cutting platform (13) includes an upper support plate (25), a cutting platform connecting frame (26), a lower right slide plate (27), a lower right slide plate bracket (28), and a right... The structure consists of a lower support plate (29), a right support rod (30), a root cutter support plate (31), a lower left slide plate (32), a lower left slide plate bracket (33), a lower left support plate (34), a left support rod (35), a secondary transmission chain (36), a middle support plate (37), a primary transmission chain (38), an upper right column (39), a right vertical shaft (40), a lower right column (41), a left vertical shaft (42), a lower left column (43), and an upper left column (44); the central cutting table (13) is composed of the upper support plate (25), the middle support plate (37), the lower left support plate (34), the lower right support plate (29), the upper right column (39), and the lower right column (44). The main body consists of four columns: column (41), lower left column (43), and upper left column (44). The left and right vertical shafts are fixed to both sides of the central cutting table body by bearing seats. The left vertical shaft (42) passes through the upper support plate (25), middle support plate (37), and lower left support plate (34), and the right vertical shaft (40) passes through the upper support plate (25), middle support plate (37), and lower right support plate (29). The root cutting device includes a bevel gearbox, a coaxial reverse gearbox, an upper cutter head, a lower cutter head, a central spindle, and a blade. The engine of the power input device is connected to the gearbox. The power transmission device includes a large sprocket, a chain, and a small sprocket. The large sprocket is assembled with the output shaft of the gearbox of the power input device, and the small sprocket is assembled with the input shaft of the bevel gearbox of the root cutting device. The chain is assembled on the large sprocket and the small sprocket. The output shaft of the bevel gearbox is connected to the central main shaft, which is connected to the coaxial reverse gearbox. The output shaft of the coaxial reverse gearbox is equipped with the upper cutter head, the lower cutter head, and the upper and lower cutter heads are equipped with blades. The bevel gearbox and the coaxial reverse gearbox are fixedly installed on the central cutting table body. The lower end of the central cutting table body is fixed with the lower right and lower left slide plates in contact with the ground. The first-stage drive chain is wound around the left sprocket and the right sprocket. The left sprocket is fixed on the left vertical shaft, and the right sprocket is fixed on the right vertical shaft. The second-stage drive chain is wound around the left second sprocket, the middle second sprocket, and the right second sprocket. The left second sprocket is fixed on the left vertical shaft, the middle second sprocket is fixed on the central main shaft of the root cutting device, and the right second sprocket is fixed on the right vertical shaft. The first-stage drive chain is equipped with a first-stage chain pawl, and the second-stage drive chain is equipped with a second-stage chain pawl.The left derailleur includes a horizontal chain wound around two sprockets, with left derailleur teeth installed on the chain. The driving sprocket is fixedly mounted on the left vertical shaft and driven by the left vertical shaft. The driven sprocket is pivotally mounted on the left derailleur plate, which is hinged to the left vertical shaft. The left derailleur plate rotates horizontally about the left vertical shaft (42), thus the entire left derailleur (11) unfolds outward or folds inward. The left derailleur wheel is a horizontal wheel with teeth, pivotally mounted on the top of a wheel axle. The bottom end of the wheel axle is rotatably fitted onto the left support rod (35) on the central cutter body. Rotating the wheel axle causes the left derailleur wheel (16) to unfold or fold. A shifting channel is formed between the left derailleur and the left derailleur wheel. The right derailleur... The chain includes a horizontal chain wound around two sprockets, with right-hand chain teeth mounted on the chain. The driving sprocket is fixedly mounted on and driven by the right vertical shaft, while the driven sprocket is pivotally mounted on the right derailleur plate, which is hinged to the right vertical shaft. The right derailleur plate rotates horizontally about the right vertical shaft (40), causing the entire right derailleur chain (14) to unfold outward or fold inward. The right derailleur wheel is a horizontal wheel with teeth, pivotally mounted on the top of a curved axle. The bottom end of the axle is rotatably fitted onto the right support rod (30) on the central cutter body. Rotating the axle causes the right derailleur wheel (15) to unfold or fold. A shifting channel is formed between the right derailleur chain and the right derailleur wheel.

2. The bidirectional contour-following harvesting machine for tall crops as described in claim 1, characterized in that: The cutter frame consists of two parallel four-bar linkages located on both sides of the chassis.

3. The bidirectional contour-following harvesting machine for tall crops as described in claim 1, characterized in that: The first and second sprockets on the left and right are located above the bevel gearbox; the second sprocket on the left, the second sprocket in the middle, and the second sprocket on the right are located below the bevel gearbox and above the coaxial reversing gearbox.

4. The bidirectional contour-following harvesting machine for tall crops as described in claim 1, characterized in that: The lower left and upper left guide vanes are fixed to the central cutting platform body; the front part of the inward-facing side of the lower left and upper left guide vanes are inclined plates from the outside to the inside; the lower right and upper right guide vanes are fixed to the central cutting platform body; the front part of the inward-facing side of the lower right and upper right guide vanes are inclined plates from the outside to the inside.

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