Carrot combine harvester

Abstract

The invention relates to the technical field of agricultural equipment, and discloses a carrot combine harvester which comprises a wheel type self-propelled chassis and further comprises a rack set, the rack set comprises a plurality of sets of racks connected side by side, the two sets of racks in the center are connected through a front-set connecting rod, and the front-set connecting rod is connected with the wheel type self-propelled chassis through a lifting device. The rack is hinged to the wheel type self-propelled chassis, a tassel supporting mechanism is arranged at the top of the first end of the rack, a clamping and pulling conveying mechanism and a flattening and tassel cutting mechanism are arranged at the bottom of the rack, the flattening and tassel cutting mechanism is arranged below the clamping and pulling conveying mechanism, a tassel discharging mechanism is arranged at the second end of the rack, and a ploughing mechanism and an output mechanism are arranged on the wheel type self-propelled chassis. The operation end of the ploughing mechanism is arranged below the first end of the clamping and pulling conveying mechanism, and the output mechanism is arranged below the second end of the clamping and pulling conveying mechanism. The carrot harvester can be suitable for large-plot operation and can harvest carrots according to different agricultural requirements, and the harvesting effect and harvesting efficiency of the carrots are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of agricultural equipment technology, and in particular to a carrot combine harvester. Background Technology

[0002] Carrots are a common crop, and are loved by many because they are rich in carotene. Carrot cultivation has become large-scale, with planting and harvesting taking place year-round from south to north, covering millions of acres. However, the rate of mechanized harvesting is low. When harvesting carrots, carrot harvesting plows are generally used to turn the carrots up the soil along the rows of carrots planted, roots and leaves included, and then they are harvested manually. Therefore, there is an urgent need for a stable and mature carrot combine harvester.

[0003] Carrots are harvested underground, and the growth of the tops and seedlings, agronomic requirements, and commercial demands all present different needs. Currently, the structure, performance, and functions of carrot combine harvesters are not perfect, and their operational stability, reliability, and practicality are insufficient. There are also no domestically produced carrot combine harvesters that are mature and in use in the fields. While trailer-mounted carrot combine harvesters developed by European agricultural machinery manufacturers are imported in small quantities, they are expensive and have limited performance capabilities. Japanese agricultural machinery manufacturers have also developed their own models, but these are designed for mountainous terrain and small plots, making them unsuitable for the large plots, agronomic requirements, and performance demands of China, and are therefore rarely seen. Therefore, there is a need for a carrot combine harvester that can adapt to the large plots, agronomic requirements, and performance demands of China. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by developing a carrot combine harvester. This invention is suitable for large-scale field operations and can harvest according to different agronomic requirements, realizing the entire process of carrot harvesting from top to output, effectively improving the harvesting effect and efficiency of carrots.

[0005] The technical solution to the technical problem solved by the present invention is as follows: a carrot combine harvester, comprising a wheeled self-propelled chassis and a frame assembly, the frame assembly comprising several sets of frames connected side by side, the two central sets of frames being connected to each other by a front connecting rod, the front connecting rod being connected to the wheeled self-propelled chassis by a lifting device, the frame being hinged to the wheeled self-propelled chassis, a tassel-raising mechanism being provided at the top of the first end of the frame, a clamping and conveying mechanism and a flattening and cutting mechanism being provided at the bottom of the frame, the flattening and cutting mechanism being located below the clamping and conveying mechanism, a tassel-removing mechanism being provided at the second end of the frame, a plowing mechanism and an output mechanism being provided on the wheeled self-propelled chassis, the working end of the plowing mechanism being located below the first end of the clamping and conveying mechanism, and the output mechanism being located below the second end of the clamping and conveying mechanism.

[0006] As an optimization, the wheeled self-propelled chassis includes a frame and an engine. The frame consists of a long rectangular frame and a short rectangular frame. The long rectangular frame is connected to the short rectangular frame via a connecting beam. The engine is located on top of the long rectangular frame, and its output is connected via a transmission system to the power inputs of the clamping and conveying mechanism, the tassel-raising mechanism, the tassel-cutting mechanism, and the tassel-removing mechanism. By setting up the long rectangular frame, the short rectangular frame, and the connecting beam, a split frame structure is formed. The long rectangular frame carries the power and control system, while the short rectangular frame carries the working mechanism. The slender connecting beam in the middle provides installation space for the frame assembly and the clamping and conveying mechanism. The area between the long and short rectangular frames is fully utilized to achieve a linear arrangement of the working mechanism, making the overall structure short and compact with a small turning radius, suitable for turning around in small plots of land. By setting up the engine as the power source for the entire machine, it provides power to the walking system and all working mechanisms, reducing the number of power sources required.

[0007] As an optimization, the frame includes a main frame and a front frame. The first end of the front frame is equipped with a tassel-raising mechanism. The second end of the front frame, near the front connecting rod, is hinged to the first end of the main frame via a horizontal hinge. The second end of the front frame, away from the front connecting rod, is connected to the first end of the main frame via two sets of connecting lugs. The two sets of connecting lugs are respectively set on the front frame and the main frame. The connecting lugs are provided with arc-shaped long slots, and fixing bolts are provided in the arc-shaped long slots. The second end of the main frame is equipped with a main tassel rack and a secondary tassel rack. The lifting device includes a lifting cylinder and a lifting chain. The second end of the main frame is hinged to a short rectangular frame. The bottom of the lifting cylinder is hinged to the top of the connecting beam. The top of the lifting cylinder is equipped with a lifting sprocket. The first end of the lifting chain is connected to the connecting beam. The second end of the lifting chain is connected to the front connecting rod. The middle part of the lifting chain is set on the lifting sprocket. By setting up a main frame and a front frame, and adopting a split design, the front frame is adapted to the front tassel-raising mechanism, while the main frame is adapted to the middle tassel-flattening and cutting mechanism and the rear tassel-removing mechanism. The main frame and the front frame are jointly adapted to the clamping and conveying mechanism, realizing the segmented installation and precise docking of the working mechanism. The layout conforms to the action flow of carrot harvesting, improving the continuity of operation. Moreover, the split structure facilitates later maintenance, repair, and component replacement, reducing operating costs. By setting a horizontal swing hinge, the main frame and the front frame are adjustable, allowing the front frame to swing slightly left and right around the hinge, ensuring that the first end of the tassel-raising mechanism and the clamping and conveying mechanism can be properly adjusted. It is designed for operation with different ridge spacings. By setting connecting ear plates, arc-shaped long slots, and fixing bolts, it can adapt to the swing trajectory of the front frame, limiting the maximum swing amplitude of the front frame to avoid misalignment caused by excessive swing, while ensuring flexible swing of the front frame. The fixing bolts can lock the position after swinging, keeping the front frame stable during operation and preventing positional deviation due to vibration. By setting main and auxiliary tassel-laying frames, it can provide a precise installation and positioning foundation for the tassel-laying mechanism. By setting lifting chains, lifting cylinders, and lifting sprockets, the height of the frame group can be adjusted to adapt to precise operation with different ridge heights.

[0008] As an optimization, the clamping and conveying mechanism includes a first belt conveyor and a second belt conveyor. The first belt conveyor is located at the bottom of the back side of the two sets of frames, and the second belt conveyor is located at the bottom of the facing side of the two sets of frames. Both the first and second belt conveyors include a driving pulley, a driven pulley, a clamping belt, a positioning wheel, and an outer positioning wheel. The clamping belt is sleeved on the outside of the driving pulley, driven pulley, and positioning wheel, and the outer positioning wheel is located on the outside of the clamping belt. The driven pulleys of both the first and second belt conveyors are slidably mounted on the first end of the front frame via a telescopic arm. The telescopic arm is vertically mounted on... The system is equipped with a mounting plate, on which an adjusting screw is threaded. An adjusting spring is provided between the adjusting screw and the first end of the front frame. The positioning wheel of the first belt conveyor mechanism is rotatably mounted on the frame. The second belt conveyor mechanism also includes an L-shaped elastic wheel frame. The inflection point of the L-shaped elastic wheel frame is hinged to the frame. The inner end of the L-shaped elastic wheel frame is connected to the positioning wheel of the second belt conveyor mechanism. The outer end of the L-shaped elastic wheel frame is connected to the spring tension plate on the frame through a tension spring. The clamping belts of the first belt conveyor mechanism and the second belt conveyor mechanism are tightly attached to each other. The output end of the transmission system is connected to the driving pulleys of the first belt conveyor mechanism and the second belt conveyor mechanism, respectively. By setting up a first belt conveyor mechanism and a second belt conveyor mechanism, the carrot tops can be gripped. The two mechanisms operate independently and with high synchronization, ensuring consistency in carrot gripping and conveying, and achieving different clamping forces at different positions and sections. The carrot tops can be gripped and conveyed by a driving pulley, a driven pulley, and a gripping belt. The telescopic arm, mounting plate, adjusting screw, and adjusting spring allow for real-time extension and retraction based on the amount of tops. Adjusting the adjusting screw ensures that the first end of the gripping and conveying mechanism has sufficient clamping force to grip and pull up the carrot tops, while the clamping force in the rear flattening area is sufficiently small to allow the carrot to initially... After the belt moves upwards to flatten, the tassel moves downwards. By setting an L-shaped elastic wheel frame and tension spring, the positioning wheel of the second belt conveyor mechanism can be pushed towards the first belt conveyor mechanism, so that the two clamping belts adaptively fit together, making the clamping force in the middle conveying area of ​​the clamping conveyor mechanism small. There is a gap between the two sets of active belt pulleys, and the distance between the active belt pulley and the nearest positioning wheel is greater than the distance between the driven belt pulley and the nearest positioning wheel, ensuring that the clamping force in the flattening area at the rear end of the clamping conveyor mechanism is less than the clamping force in the middle conveying area. By setting an outer positioning wheel, the running trajectory of the clamping belt can be double-limited with the inner and outer positioning wheels, avoiding the clamping belt from running off-center, which would cause insecure clamping and conveying jamming.

[0009] As an optimization, the transmission system includes a transfer gearbox, a T-bevel gearbox, and a main gearbox. The output end of the engine is connected to the input end of the transfer gearbox. The output shaft of the transfer gearbox is connected to the input shaft of the T-bevel gearbox via a working drive shaft. The T-bevel gearbox is mounted on the frame. The two output shafts of the T-bevel gearbox are respectively connected to the input shafts of two sets of main gearboxes. The main gearbox is mounted on the frame and has five sets of output shafts. The first output shaft of the main gearbox is connected to the input end of the tassel-setting mechanism and the drive pulley of the first belt conveyor mechanism. The second output shaft of the main gearbox is connected to the drive pulley of the second belt conveyor mechanism. The third and fourth output shafts of the main gearbox are respectively connected to the two input ends of the tassel-flattening mechanism. The fifth output shaft of the main gearbox is connected to the input end of the tassel-setting mechanism via a tassel-setting drive shaft. By setting up a distribution gearbox and using cylindrical gear meshing transmission, the transmission efficiency is high, the power transmission is stable and shock-free, and the power is precisely distributed to the working drive shaft, realizing two-stage reduction and torque increase of the engine power. This provides suitable power speed and torque for the subsequent working mechanisms. The working drive shaft is connected by a universal joint to adapt to the lifting and swinging of the frame and ensure uninterrupted power transmission. By setting up a T-type bevel gearbox and using T-type bevel gear meshing transmission, the power is precisely and synchronously transmitted in two stages, achieving a 90° change in power direction. This adapts to the spatial layout of the whole machine, making the power transmission path more compact. It provides identical power to the two main gearboxes, ensuring that the working mechanisms on both sides of the frame operate synchronously and at the same speed, improving the uniformity of carrot harvesting. By setting up a main gearbox as the core power distribution and transmission mechanism of the whole machine, a single power source is precisely distributed to the clamping and conveying mechanism, the tassel-raising mechanism, the tassel-flattening and cutting mechanism, and the tassel-removing mechanism, realizing "one gearbox for multiple drives" and achieving multi-stage reduction and torque increase and multi-directional reversal of power.

[0010] As an optimization, the tassel-supporting mechanism includes a first tassel-supporting roller, a second tassel-supporting roller, and a tassel-supporting horizontal shaft. The first and second tassel-supporting rollers are respectively inclinedly arranged on both sides of the first end of the front frame. The first end of the first tassel-supporting roller has a left-handed spiral protrusion, and the first end of the second tassel-supporting roller has a right-handed spiral protrusion. The first tassel-supporting roller is connected to the first end of the tassel-supporting horizontal shaft through a bevel gear set. The second end of the tassel-supporting horizontal shaft is connected to the second end of the second tassel-supporting roller through a bevel gear set. The fifth output shaft of the main gearbox is connected to the second end of the first tassel-supporting roller through a tassel-supporting drive shaft. By setting up a first and a second tassel-supporting roller, a symmetrical inclined layout can be formed. The first ends of the first and second tassel-supporting rollers can be inserted into both sides of the carrot ridge, adapting to the growth angle of the tassels on both sides of the carrot ridge. This can completely lift up the fallen tassels. The left-hand and right-hand spiral protrusions can push the fallen and messy carrot tassels on both sides of the ridge backward and upward, converging them to the first end of the clamping and conveying mechanism. This prevents the fallen carrot tassels on both sides from being pushed forward and causing them to tilt forward, which is beneficial for pulling out carrots and cutting tassels. By setting up a tassel-supporting horizontal shaft, a single power source can drive the two sets of rollers to rotate synchronously, at the same speed, and in opposite directions, so that the carrot tassels are straightened and converged in a consistent manner, improving the uniformity of the operation.

[0011] As an optimization, the flattening and tassel-cutting mechanism includes two sets of flattening and tassel-cutting units arranged side by side. Each flattening and tassel-cutting unit includes a flattening frame and a tassel-cutting blade. The two ends of the flattening frame are connected to the bottom of the frame through a flattening base plate. An angle is provided between the flattening frame and the frame. The bottom of the flattening frame is provided with a flattening drive wheel and several sets of flattening positioning wheels. Flattening belts are fitted on the outer sides of the flattening drive wheel and the flattening positioning wheels. There is a gap between the two sets of flattening belts. The top of the flattening frame is provided with a vertical shaft seat. A vertical shaft is provided on the vertical shaft seat. The bottom of the vertical shaft is connected to the flattening drive wheel and the tassel-cutting blade. The tassel-cutting blade is located between the flattening drive wheel and the flattening frame. The third and fourth output shafts of the main gearbox are respectively connected to the two sets of vertical shafts. By setting up two sets of top-cutting and flattening units, the carrot tops can be clamped and cut off in cooperation. By setting up a cutting frame, the carrot tops can be formed at an operating angle with the machine frame, perfectly matching the upward and backward conveying angle of the carrot. By setting up a cutting drive wheel, a flattening belt, and a cutting positioning wheel, the carrot tops can be conveyed backward in cooperation with the clamping and pulling conveyor mechanism. The speed of the flattening belt is synchronized with the clamping and pulling belt, and the gap between the flattening belts allows the tops to move upward. Moreover, due to the operating angle, the carrot will be driven upward by the clamping and pulling belt. That is, the relative movement of the flattening belt and the clamping and pulling belt achieves the uniform flattening of the tops until the carrot root is blocked and limited to the lower side of the two flattening belts, the top of the carrot is flattened, and finally the tops are cut by the top-cutting blade, separating the carrot from the tops. By setting up a vertical shaft seat and a vertical shaft, the operational stability of the cutting drive wheel and the top-cutting blade can be ensured.

[0012] As an optimization, the plowing mechanism includes two sets of plow frames and a first tie rod. The two sets of plow frames are connected to each other by a crossbar. The first end of the plow frame is detachably equipped with a plow blade via bolts, and the second end of the plow frame is hinged to a short rectangular frame. The first tie rod is a double-threaded rod, and its two ends are hinged to the crossbar and the front connecting rod respectively via threaded joints. By setting two sets of plow frames and crossbars, an integral frame can be formed, preventing shaking during plowing and ensuring the uniformity of plowing depth between the two rows. The plow blade can quickly cut into the soil, loosening the soil around the carrot roots and exposing the top part of the carrot, greatly reducing the pulling resistance and preventing root breakage. The plow blade is bolted to the plow frame for easy disassembly and maintenance. The first tie rod allows for rapid raising and lowering adjustment of the plow frame and precise adjustment of the plow blade's penetration depth, making operation convenient.

[0013] As an optimization, the tassel-setting mechanism includes a driving sprocket, a driven sprocket, a sprocket telescopic arm, a toothed chain, a tassel-pressing seat, and a guide pressure rod. The driving sprocket is positioned above the driving pulley in the first belt conveyor mechanism. The first end of the sprocket telescopic arm is slidably mounted inside the main tassel-setting frame, and the second end of the sprocket telescopic arm is equipped with a driven sprocket. The toothed chain is sleeved on the outside of the driving and driven sprockets. A spring baffle is provided on the first end of the sprocket telescopic arm. A screw seat plate is provided on the main tassel-setting frame, and a second adjusting screw is threaded onto the screw seat plate. A pressure plate is provided at the end of the second adjusting screw, along with a spring baffle. A compression spring is provided between the two parts. The tassel-pressing seat is set on the secondary tassel frame. The tassel-pressing seat includes a base plate and two sets of vertical plates. The two sets of vertical plates are vertically set on the base plate. The base plate is connected to the secondary tassel frame. The two ends of the guide pressure rod are bent. The middle part of the guide pressure rod is set between the two sets of chain plates of the toothed chain. Two sets of tassel-pressing rods are provided on the guide pressure rod. The tassel-pressing rods are set through the two sets of vertical plates. A tassel-pressing spring is sleeved on the tassel-pressing rod between the two sets of vertical plates. The first end of the tassel-pressing spring is fixedly connected to the tassel-pressing rod. The second end of the tassel-pressing spring abuts against a set of vertical plates near the secondary tassel frame. The first output shaft of the main gearbox is connected to the drive sprocket. By setting up a drive sprocket, a driven sprocket, and a toothed chain, cut tassels can be received. The drive sprocket is coaxially connected to the drive pulley of the first belt conveyor mechanism, ensuring that the tassel removal speed is consistent with the clamping and pulling speed, thus preventing tassel accumulation. By setting up a sprocket telescopic arm, a spring baffle, a screw seat plate, a second adjusting screw, and a pressure spring, the tension of the toothed chain can be adjusted to ensure that the toothed chain is always taut, preventing slippage that could lead to tassel removal failure. By setting up a tassel pressing seat, a base plate, and a vertical plate, a mounting and limiting foundation can be provided for the tassel pressing rod and the tassel pressing spring. The vertical plate can ensure axial displacement of the tassel pressing rod, allowing the guide rod to evenly press the toothed chain. The tassel pressing spring can provide continuous pressure to the guide rod, ensuring that the middle of the guide rod always presses the toothed chain, firmly pressing the tassel onto the anti-slip teeth of the toothed chain, preventing the tassel from slipping during tassel removal, ensuring smooth tassel removal, and accommodating slight chain vibrations.

[0014] As an optimization, the output mechanism includes a longitudinal conveyor, a transverse conveyor, and a second tie rod. The first end of the longitudinal conveyor is located below the leveling and trimming mechanism and is hinged to the vehicle frame. The height of the second end of the longitudinal conveyor is greater than the height of the first end. The second tie rod is a reversible threaded rod, with both ends hinged to the middle of the longitudinal conveyor and the vehicle frame via threaded joints. The transverse conveyor is positioned transversely below the second end of the longitudinal conveyor. By setting up the longitudinal conveyor, carrots can be conveyed upwards and backwards to a high position at the rear of the machine, facilitating loader or transport vehicle retrieval without manual assistance. By setting up the transverse conveyor, carrots can be output laterally to the left or right, facilitating turning operations and allowing loader or transport vehicle to follow the carrot combine harvester for flexible carrot retrieval. The second tie rod allows for quick adjustment of the longitudinal conveyor's tilt angle, making operation convenient.

[0015] Compared with the prior art, the present invention has the following beneficial effects: By using a wheeled self-propelled chassis, the machine can be provided with a self-propelled mobile platform and installation foundation suitable for large-scale field operations, eliminating the limitations of traction systems and enabling flexible relocation and field operations. The chassis layout provides ample space for multi-mechanism collaborative operations. By setting up frame groups, a combined structure of several frame groups can be used to harvest multiple rows of carrots simultaneously. This can be expanded to multiple frames for combined harvesting of multiple rows, adapting to multi-row carrot planting techniques and significantly improving operational efficiency. The chassis also serves as an integrated installation frame for various operating mechanisms, ensuring a linear arrangement of these mechanisms and the continuity of carrot harvesting actions. The symmetrical design ensures even stress distribution throughout the machine, preventing frame deformation caused by excessive load on one side and guaranteeing the accuracy of each mechanism's operating position. By setting a front connecting rod to rigidly connect the two frames, it can serve as the core force point of the lifting device, enabling the frame assembly to lift synchronously as a whole, avoiding misalignment caused by unilateral lifting. The lifting device allows adjustment of the height of the frame assembly and all working mechanisms at its first end, adapting to the carrot harvesting needs of different ridge heights. After operation, the frame assembly can be quickly lifted to prevent damage from scraping the ground during transfer. A tassel-supporting mechanism, positioned at the first end of the frame, straightens and straightens the tassels before the carrots enter the clamping area, preventing fallen or messy tassels from causing clamping failure. It can work in tandem with the clamping and conveying mechanism, forming a "front support, rear pull" collaborative operation to improve harvesting success rate. The clamping and conveying mechanism can precisely connect with the tassel-supporting mechanism to achieve "tassel-supporting"... The seamless "clamping-pulling-conveying" system utilizes a double-sided belt clamping structure, ensuring uniform clamping force on the carrot tops and preventing damage to the tops or carrot detachment due to insecure clamping. It simultaneously achieves integrated carrot pulling and upward / backward conveying without manual intervention. The conveying speed matches the overall machine travel speed, ensuring continuous harvesting. A top-flattening and cutting mechanism allows for continuous top-flattening and precise cutting during carrot conveying, maintaining a safe distance between the cutting position and the carrot root to avoid cutting the root and causing product loss. This ensures synchronous and uniform top cutting, resulting in consistent top length and improved carrot quality. A top-removing mechanism precisely connects with the top-flattening and cutting mechanism, promptly receiving the cut carrot tops and quickly discharging them to both sides. To prevent the tops from falling directly, piling up, or tangling and causing mechanical jamming, ensuring continuous operation of the entire machine, and separating the tops from the roots for easy subsequent carrot collection; by setting up a plowing mechanism precisely below the first end of the clamping and conveying mechanism, a coordinated "plowing from below and pulling from above" operation is achieved. This loosens the soil around the roots before the carrots are clamped, significantly reducing the soil's binding force on the roots, reducing clamping resistance, preventing the carrot roots from being broken, and improving harvesting integrity; two sets of plow blades precisely correspond to two rows of carrots, and the plowing depth is adjustable to accommodate carrot roots at different depths; by setting up an output mechanism, it can precisely connect with the top-cutting mechanism to promptly receive the carrots after top-cutting and transport them to the transfer vehicle, achieving a seamless connection from harvesting to transfer and greatly improving operational efficiency. Attached Figure Description

[0016] Figure 1 This is a front view of one embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the frame assembly, clamping and conveying mechanism, tassel-supporting mechanism, tassel-flattening and cutting mechanism, and tassel-removing mechanism in one embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the frame assembly and lifting device in one embodiment of the present invention.

[0019] Figure 4 This is a top view of the vehicle frame in one embodiment of the present invention.

[0020] Figure 5 This is a top view of the rack assembly in one embodiment of the present invention.

[0021] Figure 6 This is a top view of the clamping and conveying mechanism in one embodiment of the present invention.

[0022] Figure 7 This is a top view of the tassel-supporting mechanism in one embodiment of the present invention.

[0023] Figure 8 This is a front view of the flattening and trimming mechanism in one embodiment of the present invention.

[0024] Figure 9 This is a top view of the flattening and trimming mechanism in one embodiment of the present invention.

[0025] Figure 10 This is a top view of the plowing mechanism in one embodiment of the present invention.

[0026] Figure 11 This is a top view of the tassel-raising mechanism in one embodiment of the present invention.

[0027] Figure 12 This is a schematic diagram of a transmission system in one embodiment of the present invention.

[0028] Figure 13 This is a schematic diagram of the interior of the main gearbox in one embodiment of the present invention.

[0029] Figure 14 This is a schematic diagram of the transfer clutch mechanism in one embodiment of the present invention.

[0030] In the diagram: 1. Wheeled self-propelled chassis; 2. Frame assembly; 3. Clamping and conveying mechanism; 4. Tassel-raising mechanism; 5. Tassel-leveling and cutting mechanism; 6. Soil-plowing mechanism; 7. Tassel-removing mechanism; 8. Output mechanism; 9. Transmission system; 11. Chassis; 12. Engine; 13. Front axle; 14. Rear axle; 15. Wheel; 16. Drive gearbox; 17. Driver's cab; 18. Long rectangular frame; 19. Connecting beam; 110. Short rectangular frame; 111. Hydraulic cylinder hinge; 112. Hoist; 113. Lifting hinge; 114. Sowing hinge; 115. Output hinge; 116. Tie rod hinge; 21. Frame; 22. Front connecting rod; 23. Lifting hinge shaft; 24. Adjusting nut seat; 25. First adjusting screw; 26. Lifting lug; 27. Plow lifting seat; 28. Lifting chain; 29. ​​Lifting cylinder; 210. Lifting sprocket; 211. Main frame; 212. Front frame; 213. Connecting ear plate; 214. Arc-shaped long slot; 215. Lateral hinge; 216. Positioning wheel seat sleeve; 217. Outer positioning wheel seat; 218. Spring tension plate; 219. Seat plate; 220. Tassel support seat plate; 221. Pull-cutting seat plate; 222. Main tassel rack; 223. Screw seat plate; 224. Secondary tassel rack; 31. Driven pulley; 32. Driven pulley; 33. Belt clamp; 34. Adjusting screw; 35. Adjusting spring; 36. Telescopic arm; 37. Outer positioning wheel; 38. Positioning wheel; 39. L-shaped elastic wheel frame; 310. Tension spring; 41. First tassel roller; 42. Second tassel roller; 43. Tassel horizontal axis; 51. Cutting frame; 52. Vertical shaft seat; 53. Vertical shaft; 54. Cutting drive wheel; 55. Tassel cutter; 56. Leveling belt; 57. Cutting positioning wheel; 61. Plow frame; 62. Plow blade; 63. First tie rod; 64. Hinge sleeve; 65. Hanger; 71. Drive sprocket; 72. Driven sprocket; 73. Sprocket telescopic arm; 74. Spring baffle; 75. Second adjusting screw; 76. Compression spring; 77. Toothed chain; 78. Tassel holder; 79. Guide rod; 710. Tassel rod; 711. Tassel spring; 81. Longitudinal conveyor; 82. Transverse conveyor; 83. Second tie rod; 91. Output pulley; 92. Transfer belt; 93. Transfer gearbox; 94. First cylindrical gear; 95. Second cylindrical gear; 96. Input pulley; 97. Transfer output shaft; 98. Working drive shaft; 99. T-type bevel gearbox; 910. Main gearbox; 911. Main vertical shaft; 912. Pull-cut vertical shaft; 913. Tassel support longitudinal shaft; 914. Main input shaft; 915. First horizontal bevel gear; 916. First vertical bevel gear; 917. Second horizontal bevel gear; 918. Third cylindrical gear; 919. Fourth cylindrical gear; 920. Tassel support drive shaft; 921. Pull-cut drive shaft; 922. Spline sleeve; 923. Second vertical bevel gear; 924. Transfer clutch clamping wheel; 925. Transfer clutch cylinder; 926. Transfer clutch boom. Detailed Implementation

[0031] To clearly illustrate the technical features of this solution, the invention will be described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0032] Example 1 Figures 1 to 14 As one embodiment of the present invention, such as Figures 1 to 14 As shown, a carrot combine harvester includes a wheeled self-propelled chassis 1 and a frame assembly 2. The frame assembly 2 includes two symmetrically arranged frames 21, which are connected to each other by a front connecting rod 22. The front connecting rod 22 is connected to the wheeled self-propelled chassis 1 by a lifting device. The frames 21 are hinged to the wheeled self-propelled chassis 1. The top of the first end of the frame 21 is provided with a tassel-raising mechanism 4, and the bottom of the frame 21 is provided with a clamping and conveying mechanism 3 and a flattening and cutting mechanism 5. The flattening and cutting mechanism 5 is located below the clamping and conveying mechanism 3. The second end of the frame 21 is provided with a tassel-removing mechanism 7. The wheeled self-propelled chassis 1 is provided with a plowing mechanism 6 and an output mechanism 8. The working end of the plowing mechanism 6 is located below the first end of the clamping and conveying mechanism 3, and the output mechanism 8 is located below the second end of the clamping and conveying mechanism 3.

[0033] By setting up a wheeled self-propelled chassis 1, a self-propelled mobile carrier and installation foundation suitable for large-scale field operations can be provided for the entire machine, eliminating the limitations of traction and enabling flexible relocation and field operations. It is suitable for large-scale operations, and the spatial layout of the chassis provides ample space for multi-mechanism collaborative operations. By setting up a frame group 2, adopting a combination structure of two symmetrical frames 21, two rows of carrots can be harvested simultaneously. It can also be expanded to multiple frames 21 to achieve multi-row combined harvesting, adapting to the multi-row planting agronomy of carrots, improving work efficiency several times over. It can also serve as an integrated installation frame for various operating mechanisms, allowing each operating mechanism to be arranged linearly, ensuring the continuity of carrot harvesting actions. The symmetrical design ensures even force distribution on the entire machine, avoiding frame damage caused by excessive load on one side. The deformation ensures the accuracy of the working position of each mechanism; by setting the front connecting rod 22, the two sets of frames 21 are rigidly connected, which can serve as the core force point of the lifting device, realizing the overall synchronous lifting of the frame group 2 and avoiding the misalignment of the mechanism caused by unilateral lifting; by setting the lifting device, the height of the frame group 2 and all the working mechanisms at its first end can be adjusted to adapt to the carrot harvesting needs of different ridge heights. After the operation is completed, the frame group 2 can be quickly lifted to avoid the working mechanism scraping and being damaged by the ground during transfer; by setting the tassel-supporting mechanism 4, it can be placed at the first end of the frame 21 to sort and straighten the tassels before the carrots enter the clamping and pulling area, avoiding the failure of clamping and pulling due to fallen and messy tassels. It can form a "front support and rear pull" coordination with the clamping and conveying mechanism 3. This system improves harvesting success rates by employing a clamping and conveying mechanism 3, which precisely connects with the top-lifting mechanism 4 to achieve seamless integration of "top-lifting-clamping-conveying." The double-sided belt clamping structure ensures uniform clamping force on the carrot tops, preventing damage or loose gripping that could cause carrots to fall off. It also integrates carrot lifting and upward / backward conveying without manual intervention. The conveying speed matches the machine's overall travel speed, ensuring continuous harvesting. Furthermore, the top-flattening and cutting mechanism 5 utilizes the carrot conveying process to achieve continuous top-flattening and precise top-cutting. The cutting position maintains a safe distance from the carrot root, preventing root damage and ensuring synchronous and uniform top-cutting with consistent remaining top length. To improve the quality of carrots, the machine features a top-removing mechanism 7 that precisely connects with the top-cutting mechanism 5. This mechanism promptly receives the cut carrot tops and quickly discharges them to both sides, preventing the mechanism from jamming due to the tops falling directly, accumulating, or tangling. This ensures continuous operation of the machine, separates the tops from the roots, and facilitates subsequent carrot collection. A plowing mechanism 6, precisely positioned below the first end of the clamping and conveying mechanism, enables coordinated "plowing from below and pulling from above" operations. This loosens the soil around the roots before the carrots are clamped, significantly reducing the soil's binding force on the roots, minimizing clamping resistance, preventing root breakage, and improving harvesting integrity. Two sets of plow blades precisely correspond to two rows of carrots, and the plowing depth is adjustable to accommodate carrot roots at different depths.By setting up output mechanism 8, it can precisely connect with top-cutting mechanism 5 to promptly receive carrots after top-cutting and transport them to the transfer vehicle, achieving seamless connection between harvesting and transfer, and significantly improving operational efficiency.

[0034] like Figure 1 and Figure 4As shown, the wheeled self-propelled chassis 1 includes a frame 11, an engine 12, a front axle 13, a rear axle 14, wheels 15, a transmission 16, and a driver's cab 17. The frame 11 includes a long rectangular frame 18 and a short rectangular frame 110. The long rectangular frame 18 is connected to the short rectangular frame 110 via a connecting beam 19. The front axle 13 and the transmission 16 are located at the bottom of the long rectangular frame 18, and the engine 12 and the driver's cab 17 are located at the top of the long rectangular frame 18. The output end of the engine 12 is connected to the power input ends of the clamping and conveying mechanism 3, the tassel-raising mechanism 4, the tassel-flattening and cutting mechanism 5, and the tassel-removing mechanism 7 via a transmission system 9. It is also connected to the front axle 13 via a travel gearbox 16 and a drive shaft. The top of the short rectangular frame 110 is provided with a tie rod hinge seat 116 and two sets of lifting hinge seats 113. The tie rod hinge seat 116 is located between the two sets of lifting hinge seats 113. The bottom of the short rectangular frame 110 is provided with a rear axle 14. The output ends of the front axle 13 and the rear axle 14 are both provided with wheels 15. The end of the short rectangular frame 110 facing the long rectangular frame 18 is provided with a plowing hinge seat 114. The end of the short rectangular frame 110 away from the long rectangular frame 18 is provided with an output hinge seat 115. The top of the connecting beam 19 is provided with a cylinder hinge seat 111 and a hanging seat 112 in sequence from the long rectangular frame 18 to the short rectangular frame 110.A split-frame structure is formed by setting up a long rectangular frame 18, a short rectangular frame 110, and a connecting beam 19. The long rectangular frame 18 carries the power and control system, the short rectangular frame 110 carries the working mechanism, and the slender connecting beam 19 in the middle provides installation space for the frame assembly 2 and the clamping and conveying mechanism 3. The area between the front axle 13 and the rear axle 14 is fully utilized to achieve a linear arrangement of the working mechanism, making the whole machine short and compact with a small turning radius, suitable for turning around in small plots of land. By setting up an engine 12 as the power source of the whole machine, it also provides power to the walking system and all working mechanisms, reducing the number of power sources. By setting up a front axle 13, a rear axle 14, and wheels 15, it is suitable for complex road conditions such as muddy fields and furrows, with strong passability. By setting up a walking gearbox 16, the power of the engine 12 is transmitted to the front axle 13. By setting up a driver's control cab 17 It provides operators with a safe and comfortable operating environment, isolating them from field dust and debris; it integrates control components, allowing operators to control the operation of each mechanism in real time, improving operational operability; through the transmission system 9, it can accurately transmit the power of the engine 12 to all operating mechanisms, with high power transmission efficiency and low loss, realizing the power linkage and speed matching of mechanisms such as tassel lifting, clamping, tassel cutting, and tassel clearing, ensuring the continuity and synchronization of the operation of each mechanism, and improving the overall operation efficiency; through the setting of tie rod hinge 116, lifting hinge 113, plowing hinge 114 and output hinge 115, it can provide hinged installation interfaces for each operating mechanism, which are flexible in rotation and have strong load-bearing capacity, facilitating the adjustment of the mechanism's angle and height. Each hinge and the frame 11 are integrally welded structures with high connection strength; through the setting of hydraulic cylinder hinge 111 and hanging base 112, it can provide an installation foundation for the lifting device.

[0035] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, the frame 21 includes a main frame 211 and a front frame 212. The two main frames 211 are connected by a front connecting rod 22 and a rear connecting rod. The first end of the front frame 212 is provided with a tassel support plate 220, and the tassel support mechanism 4 is mounted on the tassel support plate 220. The second end of the front frame 212 is hinged to the first end of the main frame 211 on the side near the front connecting rod 22 via a horizontal hinge joint 215, and the side of the second end of the front frame 212 away from the front connecting rod 22 is connected via a horizontal hinge joint 215. Two sets of connecting lugs 213 are connected to the first end of the main frame 211. The two sets of connecting lugs 213 are respectively set on the front frame 212 and the main frame 211. The connecting lugs 213 are provided with an arc-shaped long slot 214 with the horizontal swing hinge 215 as the center. The arc-shaped long slot 214 is provided with a fixing bolt. The opposing sides of the second end are provided with main tassel racks 222. The opposing sides of the second end of the two sets of main frames 211 are provided with auxiliary tassel racks 224. Mechanism 7 is located between the main tassel frame 222 and the auxiliary tassel frame 224. The lifting device includes a lifting cylinder 29 and a chain 28. The main frame 211 is provided with a lifting hinge shaft 23, which is connected to the lifting hinge seat 113. The front connecting rod 22 is provided with an adjusting nut seat 24, which is provided with a first adjusting screw 25. The bottom of the first adjusting screw 25 abuts against the top of the connecting beam 19. The first adjusting screw 25 is used to adjust the height of the first end of the frame 21. The top of the front connecting rod 22 is provided with a lifting lug 26. The bottom of the lifting cylinder 29 is hinged to the cylinder hinge seat 111 at the top of the connecting beam 19. The top of the lifting cylinder 29 is provided with a lifting sprocket 210. The first end of the chain 28 is connected to the connecting beam 19 through the lifting seat 112. The second end of the chain 28 is connected to the front connecting rod 22 through the lifting lug 26. The middle part of the chain 28 is located on the lifting sprocket 210.By setting up a main frame 211 and a front frame 212, a split design is adopted. The front frame 212 is adapted to the front tassel-raising mechanism 4, and the main frame 211 is adapted to the middle tassel-flattening and cutting mechanism 5 and the rear tassel-removing mechanism 7. The main frame 211 and the front frame 212 are jointly adapted to the clamping and conveying mechanism 3, realizing the segmented installation and precise docking of the working mechanism. The layout conforms to the action flow of carrot harvesting, improving the continuity of operation. Moreover, the split structure facilitates later maintenance, repair and component replacement, reducing the cost of use. By setting up a tassel-raising seat plate 220, a precise and firm installation benchmark can be provided for the tassel-raising mechanism 4. By setting up a horizontal hinge 215, the adjustable design of the main frame 211 and the front frame 212 is realized, allowing the front frame 212 to swing slightly left and right around the hinge, ensuring that the first end of the tassel-raising mechanism 4 and the clamping and conveying mechanism 3 can be adapted to different ridge spacings. The machine frame 2 can be adapted to the swing trajectory of the front frame 212 by setting the connecting ear plate 213, the arc-shaped long slot 214 and the fixing bolt. This limits the maximum swing amplitude of the front frame 212, avoids the mechanism misalignment caused by excessive swing, and ensures the flexible swing of the front frame 212. The fixing bolt can lock the position after swing, so that the front frame 212 remains stable during operation and avoids positional deviation caused by vibration. The main tassel rack 222 and the auxiliary tassel rack 224 can provide a precise installation and positioning foundation for the tassel racking mechanism 7. The height of the frame group 2 can be adjusted by setting the lifting chain 28, the lifting cylinder 29 and the lifting sprocket 210, so as to adapt to the precise operation of different ridge heights. The height of the front frame 212 can be adjusted by setting the adjusting nut seat 24 and the first adjusting screw 25, that is, the height of clamping and pulling up carrot tassels.

[0036] like Figure 1 , Figure 2 and Figure 6As shown, the clamping and conveying mechanism 3 includes a first belt conveyor mechanism and a second belt conveyor mechanism. The first belt conveyor mechanism is located at the bottom of the back side of the two sets of frames 21, and the second belt conveyor mechanism is located at the bottom of the facing side of the two sets of frames 21. Both the first and second belt conveyor mechanisms include a driving pulley 31, a driven pulley 32, a clamping belt 33, a positioning wheel 38, and an outer positioning wheel 37. The clamping belt 33 is sleeved on the outside of the driving pulley 31, the driven pulley 32, and the positioning wheel 38. The outer top surface of the clamping belt 33 is toothed, which can increase the friction with the carrot tops and ensure a firm clamping. The outer positioning wheel 37 is located on the outside of the clamping belt 33 and is rotatably mounted on the frame 21 via an outer positioning wheel seat 217. The driven pulleys 32 of both the first and second belt conveyor mechanisms are slidably mounted on the first end of the front frame 212 via a telescopic arm 36. A mounting plate is vertically mounted on the arm 36. An adjusting screw 34 is threaded onto the mounting plate. An adjusting spring 35 is provided between the adjusting screw 34 and the first end of the front frame 212. The positioning wheel 38 of the first belt conveyor mechanism is rotatably mounted on the frame 21 via a positioning wheel seat 216. The second belt conveyor mechanism also includes an L-shaped elastic wheel frame 39. The inflection point of the L-shaped elastic wheel frame 39 is hinged to the frame 21 via a hinge shaft. The inner end of the L-shaped elastic wheel frame 39 is connected to the positioning wheel 38 of the second belt conveyor mechanism. A spring tension plate 218 is provided on the outer side of the frame 21. The outer end of the L-shaped elastic wheel frame 39 is connected to the spring tension plate 218 on the frame 21 via a tension spring 310. The clamping belts 33 of the first belt conveyor mechanism and the second belt conveyor mechanism are tightly attached to each other. The positioning wheels 38 of the first belt conveyor mechanism and the second belt conveyor mechanism are staggered to ensure that the two sets of clamping belts 33 stably convey the carrot tops and avoid crushing the tops.By setting up a first belt conveyor mechanism and a second belt conveyor mechanism, the carrot tops can be gripped. The two mechanisms operate independently and with high synchronization, ensuring consistency in carrot gripping and conveying, and achieving different clamping forces at different positions and sections. By setting up a driving pulley 31, a driven pulley 32, and a gripping belt 33, the carrot tops can be gripped and conveyed. By setting up a telescopic arm 36, a mounting plate, an adjusting screw 34, and an adjusting spring 35, the arm can be extended and retracted in real time according to the amount of tops. By adjusting the adjusting screw 34, it can be ensured that the first end of the gripping and conveying mechanism 3 has a sufficiently large clamping force to grip and pull up the carrot tops, while the clamping force in the rear flattening area should be small enough to allow the carrot to move upwards until the skin is flattened. After the belt is pulled, the tassel moves downwards. By setting an L-shaped elastic wheel frame 39 and a tension spring 310, the positioning wheel 38 of the second belt conveyor mechanism can be pushed towards the first belt conveyor mechanism, so that the two clamping belts 33 fit together adaptively, so that the clamping force in the middle conveying area of ​​the clamping conveyor mechanism 3 is small. There is a gap between the two sets of active belt pulleys 31. The distance between the active belt pulley 31 and the nearest positioning wheel 38 is greater than the distance between the driven belt pulley 32 and the nearest positioning wheel 38, ensuring that the clamping force in the rear flattening area of ​​the clamping conveyor mechanism 3 is less than the clamping force in the middle conveying area. By setting an outer positioning wheel 37, the running trajectory of the clamping belt 33 can be double-limited inside and outside the positioning wheel 38, avoiding the clamping belt 33 from running off-center, which would cause insecure clamping and conveying jamming.

[0037] like Figure 1 , Figure 2 and Figure 7 As shown, the tassel-supporting mechanism 4 includes a first tassel-supporting roller 41, a second tassel-supporting roller 42, and a tassel-supporting horizontal shaft 43. The first tassel-supporting roller 41 is obliquely mounted on the opposite side of the first end of the two sets of front frames 212 via a tassel-supporting seat plate 220. The second tassel-supporting roller 42 is obliquely mounted on the opposite side of the first end of the two sets of front frames 212 via a tassel-supporting seat plate 220. The first end of the first tassel-supporting roller 41 is provided with a left-handed spiral protrusion, and the first end of the second tassel-supporting roller 42 is provided with a right-handed spiral protrusion. The first tassel-supporting roller 41 is connected to the first end of the tassel-supporting horizontal shaft 43 via a bevel gear set, and the second end of the tassel-supporting horizontal shaft 43 is connected to the second end of the second tassel-supporting roller 42 via a bevel gear set. By setting up the first tassel-supporting roller 41 and the second tassel-supporting roller 42, a symmetrical inclined layout can be formed. The first ends of the first tassel-supporting roller 41 and the second tassel-supporting roller 42 can be inserted into both sides of the carrot ridge, adapting to the growth angle of the tassels on both sides of the carrot ridge. This can completely lift up the fallen tassels. The left-hand and right-hand spiral protrusions can push the fallen and messy carrot tassels on both sides of the ridge backward and upward, converging them to the first end of the clamping and conveying mechanism. This prevents the fallen carrot tassels on both sides from being pushed forward and causing them to tilt forward, which is beneficial for pulling out carrots and cutting tassels. By setting up the tassel-supporting horizontal shaft 43, it is possible to achieve synchronous, same-speed, and opposite rotation of the two sets of rollers driven by a single power source, so that the carrot tassels are straightened and converged in a consistent manner, improving the uniformity of the operation.

[0038] like Figure 1 , Figure 2 , Figure 8 and Figure 9 As shown, the flattening and tassel-cutting mechanism 5 includes two sets of flattening and tassel-cutting units arranged side by side. Each flattening and tassel-cutting unit includes a flattening and cutting frame 51 and a tassel-cutting blade 55. The bottom of the main frame 211 is provided with a flattening and cutting seat plate 221. Both ends of the flattening and cutting frame 51 are connected to the bottom of the frame 21 through the flattening and cutting seat plate 221. An angle is provided between the flattening and cutting frame 51 and the frame 21. The bottom of the flattening and cutting frame 51 is provided with a flattening and cutting drive wheel 54 and several sets of flattening and cutting positioning wheels 57. The flattening and cutting drive wheel 54 and the flattening and cutting positioning wheels 57 are connected to the bottom of the main frame 211. A flattening belt 56 is fitted on the outer side of the positioning wheel 57. There is a gap between the two sets of flattening belts 56. A vertical shaft seat 52 is provided on the top of the cutting frame 51. A vertical shaft 53 is provided on the vertical shaft seat 52. The bottom of the vertical shaft 53 is connected to the cutting drive wheel 54 and the tassel cutter 55. The tassel cutter 55 is located between the cutting drive wheel 54 and the cutting frame 51. The diameter of the tassel cutter 55 is larger than the diameter of the cutting drive wheel 54. The edges of the two sets of tassel cutters 55 are staggered to cut the tassel. By setting two sets of flattening and top-cutting units, they can work together to clamp and cut the tops; by setting the cutting frame 51 and the cutting seat 221, they can form an operating angle with the frame 21, perfectly matching the rearward and upward conveying angle of the carrot; by setting the cutting drive wheel 54, the flattening belt 56 and the cutting positioning wheel 57, they can work with the clamping and pulling conveying mechanism 3 to convey the carrot tops backward. The rotation speed of the flattening belt 56 is synchronized with the clamping belt 33, and the gap between the flattening belts 56 allows the tops to move upward. Moreover, due to the existence of the operating angle, the carrot will be driven upward by the clamping belt 33. That is, the relative movement of the flattening belt 56 and the clamping belt 33 is used to achieve uniform flattening of the tops until the carrot root is blocked and limited to the lower side of the two flattening belts 56, the top of the carrot is flattened, and finally the tops are cut by the top-cutting knife 55, and the carrot and tops are separated; by setting the vertical shaft seat 52 and the vertical shaft 53, the operational stability of the cutting drive wheel 54 and the top-cutting knife 55 can be guaranteed.

[0039] like Figure 1 and Figure 10As shown, the plowing mechanism 6 includes two sets of plow frames 61 and a first tie rod 63. The two sets of plow frames 61 are connected to each other by a crossbar. The first end of the plow frame 61 is detachably equipped with a plow blade 62 by bolts. The second end of the plow frame 61 is hinged to the short rectangular frame 110 by a hinge sleeve 64 and a plowing hinge seat 114. A hanger 65 is provided on the crossbar. A plow hanger 27 is provided at the bottom of the front connecting rod 22. The first tie rod 63 is a positive and negative threaded rod. The two ends of the first tie rod 63 are hinged to the hanger 65 and the plow hanger 27 respectively by threaded joints. Thus, adjusting the first tie rod 63 can adjust the depth of the plow blade 62 cutting into the soil ridge. The threaded joint adopts a rod end joint bearing. By setting two sets of plow frames 61 and crossbars, an integral frame can be formed, ensuring no shaking during plowing and guaranteeing the uniformity of plowing depth between the two rows. By setting plow blades 62, they can quickly cut into the soil, loosening the soil around the carrot roots and exposing the top part of the carrot, greatly reducing the resistance to pulling and preventing the roots from being broken. The plow blades 62 are bolted to the plow frames 61, making disassembly and maintenance convenient. By setting the first pull rod 63, the plow frames 61 can be quickly raised and lowered for precise adjustment of the plow blade's penetration depth, making operation convenient.

[0040] like Figure 1 , Figure 2 and Figure 11As shown, the tassel-arranging mechanism 7 includes a driving sprocket 71, a driven sprocket 72, a sprocket telescopic arm 73, a toothed chain 77, a tassel-pressing seat 78, and a guide pressure rod 79. The driving sprocket 71 is positioned above the driving pulley 31 in the first belt conveyor mechanism. The sprocket telescopic arm 73 is L-shaped, with its first end slidably positioned inside the end port of the main tassel-arranging frame 222. The end port of the main tassel-arranging frame 222 is inclined towards the auxiliary tassel-arranging frame 224, allowing tassels to be discharged to both sides of the machine. The second end of the sprocket telescopic arm 73 is connected to a bearing and... The base is equipped with a driven sprocket 72, and a toothed chain 77 is sleeved on the outside of the driving sprocket 71 and the driven sprocket 72. The outer side of the chain plate of the toothed chain 77 is provided with anti-slip teeth, which can firmly hook the cut carrot tops to prevent the tops from slipping off during top removal and ensure the top removal effect. A spring baffle 74 is provided on the first end of the sprocket telescopic arm 73. A screw seat plate 223 is provided on the main top removal frame 222. A second adjusting screw 75 is provided on the screw seat plate 223 through threads. The end of the second adjusting screw 75 is provided with a pressure plate, a pressure plate and a spring baffle. A compression spring 76 is provided between 74. A tassel-pressing seat 78 is set on the secondary tassel rack 224. The cross-section of the tassel-pressing seat 78 is F-shaped. The tassel-pressing seat 78 includes a base plate and two sets of vertical plates. The two sets of vertical plates are vertically set on the base plate. The base plate is connected to the secondary tassel rack 224. The two ends of the guide rod 79 are bent. The first end of the guide rod 79 is set between two sets of clamping belts 33. The first end of the guide rod 79 is in contact with a set of clamping belts 33, which can guide the tassel into the space between the guide rod 79 and the toothed chain 77. The middle part of the guide rod 79 is provided with Between the two sets of chain plates of the toothed chain 77, the guide pressure rod 79 is provided with two sets of tassel-pressing rods 710. The tassel-pressing rods 710 are installed through the two sets of vertical plates. A tassel-pressing spring 711 is sleeved on the tassel-pressing rod 710 between the two sets of vertical plates. The first end of the tassel-pressing spring 711 is fixedly connected to the tassel-pressing rod 710, and the second end of the tassel-pressing spring 711 abuts against a set of vertical plates near the secondary tassel rack 224. The tassel-pressing spring 711 presses the guide pressure rod 79 tightly onto the toothed chain 77. The guide pressure rod 79 is used to press the carrot tassels conveyed backward.By setting up a driving sprocket 71, a driven sprocket 72, and a toothed chain 77, cut tassels can be received. The driving sprocket 71 is coaxially connected to the driving pulley 31 of the first belt conveyor mechanism, ensuring that the tassel removal speed is consistent with the clamping and pulling speed, thus preventing tassel accumulation. By setting up a sprocket telescopic arm 73, a spring baffle 74, a screw seat plate 223, a second adjusting screw 75, and a compression spring 76, the tension of the toothed chain 77 can be adjusted to ensure that the toothed chain 77 is always in a tassel-tight state, preventing slippage that could lead to tassel removal failure. The tassel holder 78, base plate, and vertical plate provide a foundation for the installation and limiting of the tassel rod 710 and the tassel spring 711. The vertical plate ensures that the tassel rod 710 can move axially, so that the guide rod 79 can evenly press the toothed chain 77. The tassel spring 711 can provide continuous pressure to the guide rod 79, so that the middle of the guide rod 79 always presses the toothed chain 77, firmly pressing the tassel onto the anti-slip teeth of the toothed chain 77, preventing the tassel from slipping during tassel removal, ensuring smooth tassel removal, and accommodating slight chain bounce.

[0041] like Figure 1 As shown, the output mechanism 8 includes a longitudinal conveyor 81, a transverse conveyor 82, and a second tie rod 83. The longitudinal conveyor 81 uses a grate conveyor belt, which can screen off the soil and impurities adhering to the surface of the carrots while conveying them, thereby improving the cleanliness of the carrots. The first end of the longitudinal conveyor 81 is located below the flattening and tassel-cutting mechanism 5. The first end of the longitudinal conveyor 81 is hinged to the frame 11 through an output hinge seat 115. The height of the second end of the longitudinal conveyor 81 is greater than the height of the first end of the longitudinal conveyor 81. The second tie rod 83 is a positive and negative threaded screw. The two ends of the second tie rod 83 are respectively hinged to the middle of the longitudinal conveyor 81 and the tie rod hinge seat 116 of the frame 11 through threaded joints. The longitudinal conveyor 81 conveys the carrots backward and upward. The transverse conveyor 82 is transversely located below the second end of the longitudinal conveyor 81 and outputs the carrots received from the longitudinal conveyor 81 laterally. By setting up a longitudinal conveyor 81, carrots can be conveyed to the rear and upper part of the machine and placed at a high position at the rear of the machine, making it easy for loaders or transfer vehicles to follow and pick up the carrots without manual assistance. By setting up a transverse conveyor 82, carrots can be output laterally to the left or right, which is conducive to turning around and makes it easy for loaders or transfer vehicles to follow the carrot combine harvester and pick up the carrots flexibly. By setting up a second tie rod 83, the tilt angle of the longitudinal conveyor 81 can be quickly adjusted, making operation convenient.

[0042] like Figure 1 , Figure 2 , Figure 12 , Figure 13 and Figure 14As shown, the transmission system 9 includes a belt drive mechanism, a transfer clutch mechanism, a transfer gearbox 93, a T-type bevel gearbox 99, and a main gearbox 910. The belt drive mechanism includes an output pulley 91, a transfer belt 92, and an input pulley 96. The output end of the engine 12 is connected to the output pulley 91, which is connected to the input pulley 96 via the transfer belt 92. The input pulley 96 is mounted on the input shaft of the transfer gearbox 93. The transfer clutch mechanism includes a transfer clutch pressure wheel 924, a transfer clutch cylinder 925, and a transfer clutch boom 926. The first end of the transfer clutch boom 926 is hinged to the frame 11, and the middle part of the transfer clutch boom 926 is hinged to the output end of the transfer clutch cylinder 925. The top of the transfer clutch boom 926 is hinged to the top of the engine compartment. A transfer clutch pressure wheel 924 is rotatably mounted on the second end of the transfer clutch boom 926. The bottom of the transfer clutch pressure wheel 924 abuts against the top of the transfer belt 92. A first cylindrical gear 94 and a second cylindrical gear 95 mesh with each other inside the transfer gearbox 93. The input shaft of the transfer gearbox 93 is connected to the first cylindrical gear 94. The second cylindrical gear 95 is connected to the first end of the working drive shaft 98 via the transfer output shaft 97. Universal joints are provided at both ends of the working drive shaft 98. The second end of the working drive shaft 98 is connected to the input shaft of the T-type bevel gearbox 99. The two output shafts of the T-type bevel gearbox 99 are coaxially connected to the main input shafts 914 of the two main gearboxes 910 via spline sleeves 922. Two sets of first vertical bevel gears 916 are provided on the main input shaft 914 inside the gearbox 910. The working surfaces of the two sets of first vertical bevel gears 916 face opposite directions. The first vertical bevel gears 916 are connected to the top of the main vertical shaft 911 through the first horizontal bevel gear 915. The bottom of the first set of main vertical shafts 911 passes through the main gearbox 910 and is coaxially connected to the drive sprocket 71 and the drive pulley 31 of the first belt conveyor mechanism. The bottom of the second set of main vertical shafts 911 passes through the main gearbox 910 and is connected to the drive pulley 31 of the second belt conveyor mechanism. The main gearbox 910 is provided with a tasseling longitudinal shaft 913. Two sets of second vertical bevel gears 923 with their working surfaces facing opposite directions are provided on the inner end of the tasseling longitudinal shaft 913. The first set of second vertical bevel gears 923 and the second set of first horizontal bevel gears 915 are connected to each other. A bevel gear 915 is engaged. Below the second set of second vertical bevel gears 923, a second horizontal bevel gear 917 is provided. The second set of second vertical bevel gears 923 and the second horizontal bevel gear 917 are engaged. Below the second horizontal bevel gear 917, a third cylindrical gear 918 is coaxially provided. On one side of the third cylindrical gear 918, two sets of meshing fourth cylindrical gears 919 are provided. The third cylindrical gear 918 meshes with one of the sets of fourth cylindrical gears 919. Each of the two sets of fourth cylindrical gears 919 is connected to the top end of the pull-cutting drive shaft 921 through a pull-cutting vertical shaft 912. Universal joints are provided at both ends of the pull-cutting drive shaft 921. The bottom end of the pull-cutting drive shaft 921 is connected to the top end of the vertical shaft 53. The outer end of the tassel-supporting longitudinal shaft 913 is connected to the first end of the tassel-supporting drive shaft 920.Both ends of the tassel-supporting drive shaft 920 are equipped with universal joints, and the second end of the tassel-supporting drive shaft 920 is connected to the second end of the first tassel-supporting roller 41. By setting up a belt drive mechanism, power transmission between the engine 12 and the transfer gearbox 93 can be realized, achieving first-stage reduction and torque increase of the engine 12's power, providing a suitable speed for subsequent gear transmission. This results in high transmission efficiency, low noise, and easy belt disassembly for convenient maintenance. The transfer gearbox 93, using cylindrical gear meshing, achieves high transmission efficiency, stable power transmission, and no impact, precisely distributing power to the working drive shaft 98, realizing second-stage reduction and torque increase of the engine 12's power, providing a suitable power speed and torque for subsequent working mechanisms. The working drive shaft 98 is connected by universal joints, adapting to the lifting and swinging of the frame to ensure uninterrupted power transmission. A T-type bevel gearbox 98... 9. A T-type bevel gear meshing transmission is adopted to achieve precise synchronous transmission of power in two stages, enabling a 90° change in power direction. This adapts to the overall machine layout, making the power transmission path more compact. It provides identical power to both main gearboxes 910, ensuring synchronous and high-speed operation of the working mechanisms on both sides of the frame 21, thus improving the uniformity of carrot harvesting. By setting the main gearbox 910 as the core power distribution and transmission mechanism of the entire machine, a single power source is precisely distributed to the clamping and conveying mechanism 3, the tassel-raising mechanism 4, the tassel-flattening and cutting mechanism 5, and the tassel-removing mechanism 7, achieving "one gearbox, multiple drives" and realizing multi-stage reduction and torque increase, as well as multi-directional reversal of power. Through the setting of the main input shaft 914, the first... The vertical bevel gear 916, the first horizontal bevel gear 915, and the main vertical shaft 911 achieve a 90° change in power direction, converting horizontal power into vertical power. The main vertical shaft 911 has dual-axis output, and the working surfaces of the two sets of first vertical bevel gears 916 are arranged in opposite directions, enabling the first and second belt conveyor mechanisms to operate synchronously in opposite directions, adapting to the clamping and conveying requirements of carrot tops. Simultaneously, the first set of main vertical shafts 911 also coaxially drives the drive sprocket 71, achieving power linkage between clamping, pulling, and top removal. By setting the top-supporting longitudinal shaft 913 and the second vertical bevel gear 923, another 90° change in power direction is achieved, precisely transmitting power to the top-supporting mechanism 4, adapting to the spatial layout of the top-supporting mechanism 4. An additional drive shaft is required to make the overall structure more compact; to match the speed of the tassel-raising mechanism 4 with the speed of the clamping and conveying mechanism 3, achieving synchronous operation of tassel raising and clamping, and improving the continuity of operation; by setting a second bevel gear 917, a third cylindrical gear 918, a fourth cylindrical gear 919, and a pull-cutting vertical shaft 912, the power is further distributed. The pull-cutting vertical shaft 912 can provide adapted power to the flattening and cutting mechanism 5. The pull-cutting drive shaft 921 is connected by a universal joint, which can adapt to the included angle between the frame 21 and the flattening and cutting mechanism 5, ensuring uninterrupted power transmission; the tassel-raising drive shaft 920 is connected by a universal joint, which can adapt to the lifting and lowering of the frame group 2, ensuring stable and uninterrupted power transmission of the tassel-raising mechanism 4.

[0043] In operation, the first step is to prepare for the operation and conduct field tests. The operator starts the engine 12 and operates the machine from the driver's cab 17, driving the wheeled self-propelled chassis 1 to the carrot field to be harvested. According to the row spacing of the carrots, the fixing bolts in the arc-shaped long groove 214 on the connecting ear plate 213 are loosened, allowing the front frame 212 to swing left and right around the horizontal hinge 215, adjusting the distance between the first end of the tassel-raising mechanism 4 and the clamping and conveying mechanism 3 to match the width of the carrot rows. After adjustment, the fixing bolts are tightened. Then, according to the height of the carrot rows and the growth height of the tassels, the lifting cylinder 29 is operated, which drives the front connecting rod 22 through the lifting sprocket 210 and the hanging chain 28 to achieve a rough adjustment of the overall height of the frame group 2. Next, the first adjusting screw 25 is rotated to adjust the height of the first adjusting screw 25. The bottom abuts against the connecting beam 19. The height of the first end of the front frame 212 is finely adjusted to ensure that the spiral protrusion of the tassel-supporting mechanism 4 can be inserted precisely into the roots of the tassels on both sides of the carrot ridge. According to the carrot planting depth, the first pull rod 63 is rotated to quickly adjust the soil entry angle and soil entry depth of the plow frame 61. As the carrot combine harvester moves forward, it gradually cuts into the soil ridge, so that the plow blade 62 cuts into the soil to about 3-5cm below the carrot root, achieving a depth match of "plowing down and pulling up". According to the conveying height requirements, the second pull rod 83 is rotated to adjust the tilt angle of the longitudinal conveyor 81 so that the height of its second end is adapted to the height of the receiving hopper of the transfer vehicle. The extension length of the sprocket telescopic arm 73 is adjusted by the second adjusting screw 75, and the toothed chain 77 is kept at an appropriate tension in conjunction with the compression spring 76.

[0044] After the engine 12 starts, the transfer clutch mechanism is first engaged. The output end of the transfer clutch cylinder 925 extends and presses down on the transfer clutch arm 926. The second end of the transfer clutch arm 926 drives the transfer clutch pressure wheel 924 to rotate downward around the second end of the transfer clutch arm 926. The transfer clutch pressure wheel 924 presses against the outer side of the top of the transfer belt 92, causing the transfer belt 92 to tighten and closely fit the output pulley 91 and the input pulley 96. Power is transmitted by friction. The power is transmitted to the transfer gearbox 93 via the output pulley 91, the transfer belt 92, and the input pulley 96. The first cylindrical gear 94 and the second cylindrical gear 95 in the transfer gearbox 93 mesh to achieve a first-stage reduction and torque increase. The power is transmitted to the T-type bevel gearbox 99 via the transfer output shaft 97 and the working drive shaft 98. The power is divided into two parts and transmitted synchronously to the main gearbox 910 on both sides of the frame 21 via the spline sleeve 922. The main gearbox 910 serves as the core power distribution unit. The first set of main vertical shafts 911 serves as the first output shaft, driving the drive pulley 31 of the first belt conveyor mechanism and the coaxial drive sprocket 71. The second set of main vertical shafts 911 serves as the second output shaft, driving the drive pulley 31 of the second belt conveyor mechanism. The two sets of pull-cut vertical shafts 912 serve as the third and fourth output shafts, respectively, driving a set of vertical shafts 53 via the pull-cut transmission shaft 921, which in turn drive the pull-cut drive wheel 54 and the tassel cutter 55 to rotate in opposite directions. The tassel-supporting longitudinal shaft 913 serves as the fifth output shaft, driving the first tassel-supporting roller 41 via the tassel-supporting transmission shaft 920. The first tassel-supporting roller 41 drives the second tassel-supporting roller 42 to rotate in the opposite direction synchronously via the tassel-supporting horizontal shaft 43 and the bevel gear set.

[0045] During the actual field harvesting operation, the first tassel-supporting roller 41 and the second tassel-supporting roller 42, located at the forefront, rotate in opposite directions and are symmetrically inserted into both sides of the carrot ridge. The spiral protrusions lift and straighten the fallen, messy, and crisscrossed carrot tassels, converging them towards the center of the ridge and precisely guiding them to the first end inlet of the clamping and conveying mechanism 3. As the machine moves forward, the plow blade 62 cuts into the soil below the carrot ridge, loosening the soil clods around the carrot roots, exposing the upper part of the carrot root and the base of the tassels, significantly reducing the subsequent clamping resistance. The clamping belts 33 of the first and second belt conveyors rotate in opposite directions under the drive of the drive pulley 31. The first end of the clamping and conveying mechanism 3 is adjusted by the screw. The pre-compression adjusting spring 35 and the telescopic arm 36 provide a large initial clamping force, firmly clamping the roots of the carrot tops gathered by the top-raising mechanism 4. As the machine moves forward and the belt moves, the carrots are vertically pulled from the loose soil. As the carrot tops reach the middle and rear of the clamping and conveying mechanism 3, the clamping force of the clamping belt 33 gradually decreases. Under the action of the L-shaped elastic wheel frame 39 and the tension spring 310, the positioning wheel 38 of the second belt conveying mechanism adaptively adjusts its displacement to maintain the conveying state. As the carrots are conveyed backward and upward by the clamping and conveying mechanism 3, their tops begin to enter between the two flattening belts 56 of the flattening and cutting mechanism 5. Furthermore, because the rotational speed of the flattening belt 56 is synchronized with that of the clamping belt 33, and the cutting and pulling action is synchronized... The frame 51 and the machine frame 21 form a matching angle. The carrot tops are caught in the gap between the two flattening belts 56. After the carrot enters the section between the two flattening belts 56, the carrot tops are pulled up and down. The carrot first moves upwards to the flattening belts 56 and is blocked below them. The tops then move downwards, leveling the top of the carrot until it reaches the top-cutting blade 55 and is cut cleanly with consistent top length. The carrot and tops separate, and the carrot falls onto the first end of the longitudinal conveyor 81. The tops continue to move backwards and upwards with the clamping belt 33. When the carrot is conveyed backwards and upwards by the grate conveyor belt of the longitudinal conveyor 81, it can... During the process, the soil adhering to the surface is sieved off. After reaching the second high position of the longitudinal conveyor 81, the carrot tops fall into the transverse conveyor 82, which outputs them laterally to the left or right. The transfer vehicle can pick them up in parallel. The cut carrot tops continue to be conveyed backward by the clamping belt 33. Under the guidance of the guide rod 79, the tops enter between the guide rod 79 and the toothed chain 77. The guide rod 79, through the top-pressing spring 711 and the top-pressing rod 710, elastically presses the tops onto the anti-slip teeth of the toothed chain 77. The drive sprocket 71, which is coaxial with the drive pulley 31 of the first belt conveyor mechanism, drives the toothed chain 77 to discharge the tops obliquely to both sides of the machine, so that they fall into the field or collection device, avoiding the accumulation and blockage of the tops.

[0046] When it is necessary to stop the operation, turn around, or transfer the plot after harvesting, the transfer clutch mechanism is disengaged. The output end of the transfer clutch cylinder 925 retracts and raises the transfer clutch boom 926. The second end of the transfer clutch boom 926 drives the transfer clutch pressure wheel 924 to rotate upward around the second end of the transfer clutch boom 926. The transfer clutch pressure wheel 924 returns to its original position and disengages from the transfer belt 92, causing the transfer belt 92 to loosen. The transfer belt 92 loses sufficient friction with the grooves of the output pulley 91 and the input pulley 96, interrupting the power transmission. The lifting cylinder 29 is operated to raise the frame assembly 2 to a high position, so that the tassel-supporting mechanism 4, the clamping and conveying mechanism 3, the plow blade 62, etc. are completely off the ground, avoiding damage from collisions with the ground during the transfer process. This invention enables a continuous and automated combined harvesting operation of carrots, from "top lifting and sorting—plowing and loosening the soil and roots—clamping and conveying—flattening and cutting the tops—root output—top discharge." The symmetrical double-sided frame design, combined with the adjustable front frame and lifting system, perfectly adapts to the large-scale carrot planting patterns in China with large plots, multiple ridge spacings, and different agronomic requirements. The modular operating mechanism layout and efficient transmission system ensure the stability, reliability, and high passability of the entire machine. It completely solves the industry pain point of traditional carrot harvesting relying on manual labor or the poor adaptability of imported equipment, and significantly improves the efficiency and commercial quality of mechanized carrot harvesting.

[0047] In Embodiment 1, the present invention is provided with two sets of frames 21, i.e., two working units, which can be used to work on two rows of carrots. However, the scope of protection of the present invention is not limited thereto. Any person skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention within the scope of the technology disclosed in the present invention, such as adding frames 21 in pairs on the outside of the two sets of frames 21 in the center to achieve multi-row operations such as four-row, six-row, or eight-row operations. All of these should be covered within the scope of protection of the present invention. The description of the orientation or relative positional relationship of the structure in the present invention, such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or relative positional relationship, is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the structure referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

Claims

1. A carrot combine harvester, comprising a wheeled self-propelled chassis (1), characterized in that: It also includes a frame group (2), which includes several frames (21) connected side by side. The two central frames (21) are connected to each other by a front connecting rod (22). The front connecting rod (22) is connected to the wheeled self-propelled chassis (1) by a lifting device. The frame (21) is hinged to the wheeled self-propelled chassis (1). The top of the first end of the frame (21) is provided with a tassel-raising mechanism (4). The bottom of the frame (21) is provided with a clamping and pulling conveying mechanism (3) and a flattening and cutting tassel mechanism (5). The flattening and cutting tassel mechanism (5) is located below the clamping and pulling conveying mechanism (3). The second end of the frame (21) is provided with a tassel-removing mechanism (7). The wheeled self-propelled chassis (1) is provided with a plowing mechanism (6) and an output mechanism (8). The working end of the plowing mechanism (6) is located below the first end of the clamping and pulling conveying mechanism (3). The output mechanism (8) is located below the second end of the clamping and pulling conveying mechanism (3).

2. The carrot combine harvester according to claim 1, characterized in that: The wheeled self-propelled chassis (1) includes a frame (11) and an engine (12). The frame (11) includes a long rectangular frame (18) and a short rectangular frame (110). The long rectangular frame (18) is connected to the short rectangular frame (110) through a connecting beam (19). The engine (12) is located on the top of the long rectangular frame (18). The output end of the engine (12) is connected to the power input ends of the clamping and conveying mechanism (3), the tassel-raising mechanism (4), the tassel-flattening and cutting mechanism (5), and the tassel-removing mechanism (7) through the transmission system (9).

3. The carrot combine harvester according to claim 2, characterized in that: The frame (21) includes a main frame (211) and a front frame (212). The first end of the front frame (212) is provided with a tasseling mechanism (4). The second end of the front frame (212) is hinged to the first end of the main frame (211) via a horizontal hinge joint (215) on the side near the front connecting rod (22). The second end of the front frame (212) is connected to the first end of the main frame (211) via two sets of connecting lugs (213). The two sets of connecting lugs (213) are respectively provided on the front frame (212) and the main frame (211). The connecting lugs (213) are provided with arc-shaped long slots (214). The slot (214) is equipped with fixing bolts. The second end of the main frame (211) is equipped with a main tassel frame (222) and a secondary tassel frame (224). The lifting device includes a lifting cylinder (29) and a chain (28). The second end of the main frame (211) is hinged to the short rectangular frame (110). The bottom of the lifting cylinder (29) is hinged to the top of the connecting beam (19). The top of the lifting cylinder (29) is equipped with a lifting sprocket (210). The first end of the chain (28) is connected to the connecting beam (19). The second end of the chain (28) is connected to the front connecting rod (22). The middle part of the chain (28) is set on the lifting sprocket (210).

4. The carrot combine harvester according to claim 3, characterized in that: The clamping and conveying mechanism (3) includes a first belt conveyor and a second belt conveyor. The first belt conveyor is located at the bottom of the back side of the two sets of frames (21), and the second belt conveyor is located at the bottom of the opposite side of the two sets of frames (21). Both the first belt conveyor and the second belt conveyor include a driving pulley (31), a driven pulley (32), a clamping belt (33), a positioning wheel (38), and an outer positioning wheel (37). The clamping belt (33) is sleeved on the outside of the driving pulley (31), the driven pulley (32), and the positioning wheel (38). The outer positioning wheel (37) is located on the outside of the clamping belt (33). The driven pulleys (32) of the first belt conveyor and the second belt conveyor are slidably mounted on the first end of the front frame (212) through the telescopic arm (36). The telescopic arm (36) is vertically mounted on the first end of the front frame (212). Mounting plate, mounting plate is provided with adjusting screw (34) by thread, adjusting spring (35) is provided between adjusting screw (34) and the first end of front frame (212), positioning wheel (38) of first belt conveyor is rotatably mounted on frame (21), second belt conveyor also includes L-shaped elastic wheel frame (39), the inflection point of L-shaped elastic wheel frame (39) is hinged to frame (21), inner end of L-shaped elastic wheel frame (39) is connected to positioning wheel (38) of second belt conveyor, outer end of L-shaped elastic wheel frame (39) is connected to spring tension plate (218) on frame (21) by tension spring (310), clamping belt (33) of first belt conveyor and second belt conveyor are tightly attached to each other, output end of transmission system (9) is connected to driving belt pulley (31) of first belt conveyor and second belt conveyor respectively.

5. The carrot combine harvester according to claim 4, characterized in that: The transmission system (9) includes a transfer gearbox (93), a T-type bevel gearbox (99), and a main gearbox (910). The output end of the engine (12) is connected to the input end of the transfer gearbox (93). The output shaft of the transfer gearbox (93) is connected to the input shaft of the T-type bevel gearbox (99) via a working drive shaft (98). The T-type bevel gearbox (99) is mounted on the frame (21). The two output shafts of the T-type bevel gearbox (99) are respectively connected to the input shafts of two sets of main gearboxes (910). The main gearboxes (910) are mounted on the frame (21). The main gearbox (910) is equipped with five sets of output shafts. The first output shaft of the main gearbox (910) is connected to the input end of the tassel-setting mechanism (7) and the driving pulley (31) of the first belt conveyor mechanism, respectively. The second output shaft of the main gearbox (910) is connected to the driving pulley (31) of the second belt conveyor mechanism. The third and fourth output shafts of the main gearbox (910) are connected to the two input ends of the tassel-flattening mechanism (5), respectively. The fifth output shaft of the main gearbox (910) is connected to the input end of the tassel-supporting mechanism (4) through the tassel-supporting drive shaft (920).

6. The carrot combine harvester according to claim 5, characterized in that: The tassel-supporting mechanism (4) includes a first tassel-supporting roller (41), a second tassel-supporting roller (42), and a tassel-supporting horizontal shaft (43). The first tassel-supporting roller (41) and the second tassel-supporting roller (42) are respectively inclinedly arranged on both sides of the first end of the front frame (212). The first end of the first tassel-supporting roller (41) is provided with a left-hand spiral protrusion, and the first end of the second tassel-supporting roller (42) is provided with a right-hand spiral protrusion. The first tassel-supporting roller (41) is connected to the first end of the tassel-supporting horizontal shaft (43) through a bevel gear set. The second end of the tassel-supporting horizontal shaft (43) is connected to the second end of the second tassel-supporting roller (42) through a bevel gear set. The fifth output shaft of the main gearbox (910) is connected to the second end of the first tassel-supporting roller (41) through the tassel-supporting transmission shaft (920).

7. The carrot combine harvester according to claim 5, characterized in that: The flattening and tassel-cutting mechanism (5) includes two sets of flattening and tassel-cutting units arranged side by side. Each flattening and tassel-cutting unit includes a flattening and cutting frame (51) and a tassel-cutting knife (55). The two ends of the flattening and cutting frame (51) are connected to the bottom of the frame (21) through a flattening and cutting seat plate (221). An angle is provided between the flattening and cutting frame (51) and the frame (21). The bottom of the flattening and cutting frame (51) is provided with a flattening and cutting drive wheel (54) and several sets of flattening and cutting positioning wheels (57). The outer sides of the flattening and cutting drive wheel (54) and the flattening and cutting positioning wheels (57) are... A flattening belt (56) is provided, and there is a gap between the two sets of flattening belts (56). The top of the cutting frame (51) is provided with a vertical shaft seat (52), and a vertical shaft (53) is provided on the vertical shaft seat (52). The bottom of the vertical shaft (53) is connected to the cutting drive wheel (54) and the tassel cutter (55). The tassel cutter (55) is located between the cutting drive wheel (54) and the cutting frame (51). The third output shaft and the fourth output shaft of the main gearbox (910) are respectively connected to the two sets of vertical shafts (53).

8. The carrot combine harvester according to claim 2, characterized in that: The plowing mechanism (6) includes two sets of plow frames (61) and a first tie rod (63). The two sets of plow frames (61) are connected to each other by a crossbar. The first end of the plow frame (61) is detachably equipped with a plow blade (62) by bolts. The second end of the plow frame (61) is hinged to a short rectangular frame (110). The first tie rod (63) is a positive and negative threaded rod. The two ends of the first tie rod (63) are hinged to the crossbar and the front connecting rod (22) respectively by threaded joints.

9. The carrot combine harvester according to claim 5, characterized in that: The tassel-arranging mechanism (7) includes a drive sprocket (71), a driven sprocket (72), a sprocket telescopic arm (73), a toothed chain (77), a tassel-pressing seat (78), and a guide pressure rod (79). The drive sprocket (71) is located above the drive belt pulley (31) in the first belt conveyor mechanism. The first end of the sprocket telescopic arm (73) is slidably located inside the main tassel-arranging frame (222). The second end of the sprocket telescopic arm (73) is provided with a driven sprocket (72). The toothed chain (77) is sleeved on the outside of the drive sprocket (71) and the driven sprocket (72). A spring baffle (74) is provided on the first end of the sprocket telescopic arm (73). A screw seat plate (223) is provided on the main tassel-arranging frame (222). A second adjusting screw (75) is provided on the screw seat plate (223) through a thread. A pressure plate is provided at the end of the second adjusting screw (75). The pressure plate and the spring baffle (79) A compression spring (76) is provided between 74), and a tassel-pressing seat (78) is provided on the auxiliary tassel frame (224). The tassel-pressing seat (78) includes a base plate and two sets of vertical plates. The two sets of vertical plates are vertically set on the base plate. The base plate is connected to the auxiliary tassel frame (224). The two ends of the guide pressure rod (79) are bent. The middle part of the guide pressure rod (79) is set between the two sets of chain plates of the toothed chain (77). Two sets of tassel-pressing rods (710) are provided on the guide pressure rod (79). The tassel-pressing rods (710) are set through the two sets of vertical plates. A tassel-pressing spring (711) is sleeved on the tassel-pressing rod (710) between the two sets of vertical plates. The first end of the tassel-pressing spring (711) is fixedly connected to the tassel-pressing rod (710). The second end of the tassel-pressing spring (711) abuts against a set of vertical plates close to the auxiliary tassel frame (224). The first output shaft of the main gearbox (910) is connected to the drive sprocket (71).

10. The carrot combine harvester according to claim 2, characterized in that: The output mechanism (8) includes a longitudinal conveyor (81), a transverse conveyor (82), and a second tie rod (83). The first end of the longitudinal conveyor (81) is located below the flattening and trimming mechanism (5). The first end of the longitudinal conveyor (81) is hinged to the frame (11). The height of the second end of the longitudinal conveyor (81) is greater than the height of the first end of the longitudinal conveyor (81). The second tie rod (83) is a positive and negative threaded screw. The two ends of the second tie rod (83) are respectively hinged to the middle of the longitudinal conveyor (81) and the frame (11) through threaded joints. The transverse conveyor (82) is transversely located below the second end of the longitudinal conveyor (81).

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