Wheel-mounted tobacco field work platform with flexible profiling chassis

Abstract

The present application belongs to the technical field of agricultural machinery, in particular to a wheeled tobacco field operation platform with a flexible profiling chassis, comprising a chassis platform and a set of flexible profiling wheeled systems; the flexible profiling wheeled system comprises a fixed disc, a hydraulic cylinder, a support frame, a wheel and an extension shaft; the fixed disc is fixedly connected with the hydraulic cylinder; the hydraulic cylinder is fixedly connected with the support frame; the support frame is internally provided with the wheel; the extension shaft comprises an input shaft and an output shaft; the input shaft is fixedly connected with an expansion cylinder; the output shaft and the expansion cylinder are drivingly connected through a spline and a key groove. The hydraulic cylinder directly drives the support frame to move the wheel transversely, and the spline extension shaft structure can realize stepless adjustment of the wheel track without interrupting the power, flexibly adapts to different ridge and furrow spacings of the tobacco field, avoids damaging seedlings and roots, and each wheel can be adjusted in the extension degree, realizes independent profiling of the tobacco field terrain, and improves the flexibility of the chassis system.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery technology, specifically a wheeled tobacco field operation platform with a flexible contour-following chassis. Background Technology

[0002] Tobacco cultivation typically employs a raised bed planting method, with the furrow spacing varying depending on the variety, agronomical requirements, and terrain conditions. Wheeled work platforms are crucial equipment in tobacco production, used for field transportation, fertilization, plant protection, and transplanting. They offer excellent mobility and flexibility, adapting to tobacco field soil conditions and working environments. These platforms can be equipped with various work implements, such as hole-making and fertilization devices, mulching machines, transplanters, and tillage and ridging machines, enabling multi-functional integrated operations and thus improving the mechanization level of tobacco production. In hilly and mountainous areas where tobacco fields are fragmented and have significant topographical variations, higher demands are placed on the work platforms' mobility, terrain adaptability, and wheel spacing adjustment capabilities.

[0003] Traditional wheeled work platforms, when used in hilly and mountainous tobacco fields, generally employ fixed wheelbases or manually adjustable stepped structures. This makes it impossible to flexibly and quickly adjust the wheelbase according to the fragmented nature of tobacco fields and the varying spacing between rows. As a result, when the equipment travels on rows with variable spacing, it is prone to crushing seedlings and damaging roots. In some cases, the wheelbase mismatch prevents the platform from entering the field altogether, resulting in the prominent problem of "unable to enter the field or adjust the wheelbase." Furthermore, adjusting the wheelbase often requires interrupting power transmission, which is not only cumbersome and inefficient, but also only allows for simultaneous adjustment on both sides, lacking independent control over the extension and retraction of each wheel. Therefore, it lacks independent contour-following capabilities, making it difficult to conform to the undulating terrain of hilly and mountainous areas. The overall chassis system has poor flexibility, resulting in insufficient passability and operational stability, further limiting the efficiency and adaptability of mechanized operations.

[0004] Therefore, the present invention provides a wheeled tobacco field operation platform with a flexible contour-following chassis. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a wheeled tobacco field operation platform with a flexible contoured chassis, comprising a chassis platform and a set of flexible contoured wheel systems;

[0007] The flexible contour-following wheel system is used to adjust the wheel gauge according to the spacing between tobacco field furrows or other conditions; the flexible contour-following wheel system includes a fixed disc, a hydraulic cylinder, a support frame, wheels, and a telescopic axle;

[0008] The fixed plate is fixedly connected to the side of the chassis platform; a hydraulic cylinder is fixedly connected to the fixed plate; a support frame is fixedly connected to the output end of the hydraulic cylinder; the support frame is designed in an L-shape; wheels are installed inside the support frame.

[0009] The telescopic shaft includes an input shaft and an output shaft; an expansion cylinder is fixedly connected to the end of the input shaft; the expansion cylinder passes through the fixed disc and is rotatably connected to it via a bearing; one end of the output shaft is slidably connected inside the expansion cylinder, and the other end is fixedly connected to a wheel; the output shaft passes through the support frame and is rotatably connected to it via a bearing; the output shaft and the expansion cylinder are connected by a spline and keyway transmission.

[0010] Preferably, a cleaning assembly is provided on the top of the support frame; the cleaning assembly includes a pair of rollers rotatably connected to the support frame; one of the rollers is coaxially connected to a bevel gear; a belt is sleeved on the surface of the roller; a set of toothed elastic blocks are evenly distributed on the outer side of the belt.

[0011] Preferably, a first transmission wheel is fixedly connected to the surface of the output shaft; a second transmission wheel and a second bevel gear are coaxially connected at the top of the support frame; a transmission strip is sleeved on the surface of the first and second transmission wheels; the first bevel gear and the second bevel gear mesh with each other.

[0012] Preferably, the cleaning components are provided in two parts and are symmetrically distributed about the bevel gear.

[0013] Preferably, the elastic block has an air chamber inside; an air outlet is provided between the side of the elastic block away from the belt and the air chamber.

[0014] Preferably, an air inlet is provided between the belt and the air chamber; both the air inlet and the air outlet are provided with a one-way structure; the one-way structure includes a fixing ring and an elastic sheet attached to one side of the fixing ring; one end of the elastic sheet is fixedly connected to the fixing ring.

[0015] Preferably, a self-rescue component is provided on the side of the support frame; the self-rescue component includes a support arm; one end of the support arm is hinged to the support frame, and the other end is fixedly connected to a cabin; an electric telescopic rod is hinged between the middle of the support arm and the support frame; a self-rescue roller is rotatably connected to the side of the cabin; a motor for driving the self-rescue roller is provided inside the cabin; and a set of soil-collecting plates are evenly distributed on the surface of the self-rescue roller.

[0016] Preferably, the support arm is designed as a hollow structure and has a drag-increasing material inside; the top of the support arm has an inlet; the bottom of the support arm has a conduit and is equipped with a control valve.

[0017] Preferably, the support arm is provided with an inner liner; a set of elastic elements are evenly distributed between the inner liner and the support arm; and the resistance-increasing material is added inside the inner liner.

[0018] Preferably, a set of friction protrusions are evenly distributed on the inner surface of the inner liner.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. The present invention provides a wheeled tobacco field operation platform with a flexible contour-following chassis, which addresses the unique terrain characteristics of hilly and mountainous tobacco fields, such as fragmented plots, variable furrow spacing, and large surface undulations. It offers a solution for the frequent adjustment of wheel track, using a hydraulic cylinder to directly drive the support frame and move the wheels laterally. Combined with a spline telescopic shaft structure, stepless adjustment of the wheel track can be achieved without interrupting power, flexibly adapting to different furrow spacings in the tobacco field, effectively preventing damage to seedlings and roots. Furthermore, each wheel can be individually adjusted for extension, enabling independent contour-following of the tobacco field terrain. This improves the flexibility of the chassis system and operational efficiency, effectively solving the problem of traditional fixed wheel track platforms being unable to "enter the field or adjust the wheel track width" in hilly and mountainous areas.

[0021] 2. The wheeled tobacco field operation platform with a flexible contoured chassis described in this invention, during field operations, drive wheel one rotates synchronously with the output shaft, driving drive wheel two and coaxial bevel gear two to rotate via a transmission bar. Since bevel gear one and bevel gear two mesh with each other, bevel gear one rotates accordingly and drives the coaxial roller to rotate, thereby causing the belt sleeved between the two rollers to circulate. During the movement of the belt, evenly distributed toothed elastic blocks can contact the elastic blocks if the weeds, soil, and debris such as fallen leaves and branches adhering to the wheel surface reach a certain thickness. The moving elastic blocks can effectively clean the debris, ensuring smooth wheel movement and reducing the occurrence of increased wheel resistance and slippage due to debris covering. Furthermore, the wheel's rotation and the elastic blocks form tangential friction, and the circulatory movement of the elastic blocks and the wheel form axial friction. This dynamic superposition method can not only scrape away most of the loose debris on the wheel surface, but also, through the deformation characteristics of the elastic blocks themselves, specifically clean the tangential and axial patterns and grooves on the tire surface.

[0022] 3. The wheeled tobacco field operation platform with a flexible contour-following chassis described in this invention can activate a self-rescue component when the vehicle gets stuck in muddy and complex road conditions, causing the tires to slip and become unable to get out. The electric telescopic rod retracts, causing the support arm, cabin, and self-rescue roller to deflect downwards as a whole, lowering the self-rescue roller to the ground, so that the soil-collecting plate contacts the ground. Then, the motor drives the self-rescue roller to rotate, and the soil-collecting plate continuously inserts into the ground during the rotation, grabbing soil and pushing it towards the wheels, throwing soil clods into the gap between the tires and the ground to form a soil layer. By increasing the amount of soil accumulation under the tires, the vehicle's posture is raised, while improving the contact friction between the tires and the ground and reducing slippage. Attached Figure Description

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Figure 1 This is a perspective view of the present invention;

[0025] Figure 2 This is a schematic diagram of the flexible contour-following wheel system in this invention;

[0026] Figure 3 This is a schematic diagram of the wheel structure in this invention;

[0027] Figure 4 yes Figure 3 Enlarged view of a portion of point A in the middle;

[0028] Figure 5 This is a schematic diagram of the cleaning component in this invention;

[0029] Figure 6 This is a schematic diagram of the support frame in this invention;

[0030] Figure 7 This is a cross-sectional view of the elastic block in this invention;

[0031] Figure 8 yes Figure 7 Enlarged view of a section at point B in the middle;

[0032] Figure 9 This is a cross-sectional view of the support arm in this invention;

[0033] Figure 10 yes Figure 9 Enlarged view of a section at point C.

[0034] In the diagram: 1. Chassis platform; 2. Fixed plate; 3. Hydraulic cylinder; 4. Support frame; 5. Wheel; 6. Input shaft; 7. Output shaft; 8. Expanding cylinder; 9. Spline; 10. Roller; 11. Bevel gear one; 12. Belt; 13. Elastic block; 14. Transmission wheel one; 15. Transmission wheel two; 16. Bevel gear two; 17. Transmission bar; 18. Air chamber; 19. Air outlet; 20. Air inlet; 21. Fixed ring; 22. Elastic sheet; 23. Support arm; 24. Cabin; 25. Electric telescopic rod; 26. Self-rescue roller; 27. Soil extraction plate; 28. Addition port; 29. ​​Conduit; 30. Inner liner; 31. Elastic element; 32. Friction protrusion. Detailed Implementation

[0035] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0036] like Figures 1 to 10 As shown, the present invention provides a wheeled tobacco field operation platform with a flexible contoured chassis, comprising a chassis platform 1 and a set of flexible contoured wheel systems.

[0037] The flexible contour-following wheel system is used to adjust the wheel gauge according to the spacing between tobacco field furrows or other conditions; the flexible contour-following wheel system includes a fixed disc 2, a hydraulic cylinder 3, a support frame 4, wheels 5, and a telescopic axle;

[0038] The fixed plate 2 is fixedly connected to the side of the chassis platform 1; the fixed plate 2 is fixedly connected to a hydraulic cylinder 3; the output end of the hydraulic cylinder 3 is fixedly connected to a support frame 4; the support frame 4 is designed in an L-shape; and wheels 5 are installed inside the support frame 4.

[0039] The telescopic shaft includes an input shaft 6 and an output shaft 7; an expansion cylinder 8 is fixedly connected to the end of the input shaft 6; the expansion cylinder 8 passes through the fixed disk 2 and is rotatably connected to it via a bearing; one end of the output shaft 7 is slidably connected inside the expansion cylinder 8, and the other end is fixedly connected to the wheel 5; the output shaft 7 passes through the support frame 4 and is rotatably connected to it via a bearing; the output shaft 7 and the expansion cylinder 8 are connected by a spline 9 and a keyway.

[0040] When the present invention is in operation, the chassis platform 1 is used to carry sub-machines such as hole making, transplanting, mulching, hilling, and weeding to move and operate in the tobacco field. When it is necessary to adjust the wheel track according to the spacing between the tobacco field furrows, the output end of the hydraulic cylinder 3 is controlled to extend and retract, which drives the support frame 4 fixedly connected to it to move laterally. Since one end of the output shaft 7 is fixedly connected to the wheel 5, and the output shaft 7 passes through the support frame 4 and is rotatably connected to the support frame 4 through the bearing, the movement of the support frame 4 will drive the output shaft 7 to slide inside the expansion cylinder 8. The spline 9 and keyway structure between the output shaft 7 and the expansion cylinder 8 ensure that the power from the chassis platform 1 can be stably transmitted from the input shaft 6 to the output shaft 7 through the expansion cylinder 8, thereby driving the wheel 5 to rotate and propelling the entire platform to move between the tobacco field furrows.

[0041] This invention addresses the unique terrain characteristics of hilly and mountainous tobacco fields, such as fragmented plots, variable furrow spacing, and significant ground undulations. It provides a solution for frequently adjusting wheel track, where a hydraulic cylinder 3 directly drives the support frame 4 to move the wheels 5 laterally. Combined with the splined 9 telescopic shaft structure, stepless adjustment of the wheel track can be achieved without interrupting power, flexibly adapting to different furrow spacings in tobacco fields. This effectively avoids damaging seedlings and roots. Furthermore, each wheel 5 can be individually adjusted for extension, enabling independent contouring to the tobacco field terrain. This improves the flexibility of the chassis system and operational efficiency, effectively solving the problem of traditional fixed wheel track platforms being unable to "enter the field or adjust the track width" in hilly and mountainous areas.

[0042] In one embodiment of the present invention, a cleaning assembly is provided on the top of the support frame 4; the cleaning assembly includes a pair of rollers 10 rotatably connected to the support frame 4; one of the rollers 10 is coaxially connected to a bevel gear 11; a belt 12 is sleeved on the surface of the roller 10; a set of toothed elastic blocks 13 are evenly distributed on the outer side of the belt 12.

[0043] The output shaft 7 is fixedly connected to a transmission wheel 14; the support frame 4 is provided with a coaxially connected transmission wheel 15 and a bevel gear 16 on its top; a transmission bar 17 is sleeved on the surface of the transmission wheel 14 and the transmission wheel 15; the bevel gear 11 and the bevel gear 16 mesh with each other; the two transmission wheels and the transmission bar 17 can be in the form of pulleys, transmission belts, sprockets, or chains.

[0044] During field operations, transmission wheel 14 rotates synchronously with output shaft 7, driving transmission wheel 15 and coaxial bevel gear 16 to rotate via transmission bar 17. Since bevel gear 11 and bevel gear 16 mesh, bevel gear 11 rotates accordingly, driving coaxial roller 10 to rotate, which in turn causes belt 12, which is fitted between the two rollers 10, to circulate. During the movement of belt 12, evenly distributed toothed elastic blocks 13, if weeds, soil, and fallen leaves adhering to the surface of wheel 5 reach a certain thickness, can contact the elastic blocks 13. The moving elastic blocks 13 can effectively remove the debris. Effective cleaning ensures smooth movement of wheel 5, reducing the occurrence of increased resistance and slippage caused by debris covering wheel 5. Furthermore, the rotation of wheel 5 and the elastic block 13 form tangential friction, while the cyclical movement of elastic block 13 and the wheel 5 form axial friction. This dynamic superposition method not only removes most of the loose debris from the surface of wheel 5, but also uses the deformation characteristics of elastic block 13 itself to specifically clean the tangential and axial patterns and grooves on the tire surface. Elastic block 13 is made of wear-resistant rubber material, which can deform when it comes into contact with debris on the surface of wheel 5, avoiding damage to elastic block 13 itself or tire.

[0045] In one embodiment of the present invention, the cleaning components are provided in two parts and are symmetrically distributed about the bevel gear 16.

[0046] Each cleaning assembly includes an independent roller 10, a bevel gear 11, a belt 12, and a toothed elastic block 13. The bevel gears 11 of both assemblies mesh with the bevel gear 16 at right angles, and the two bevel gears 11 are on the same axis. Therefore, the belts 12 of the two cleaning assemblies move in opposite directions, and the two sets of elastic blocks 13 axially rub the debris on the surface of the wheel 5. That is, one belt 12 drives the elastic block 13 to clean from the left side to the right side of the wheel 5, while the other belt 12 drives the elastic block 13 to clean from the right side to the left side, forming a bidirectional cross-cleaning effect. This can apply pulling force to the debris from different directions, effectively preventing the debris from getting tangled in the tire tread due to unidirectional friction. At the same time, the bidirectional elastic blocks 13 can also repeatedly clean the same area on the surface of the wheel 5 multiple times, further improving the thoroughness of the cleaning.

[0047] In one embodiment of the present invention, the elastic block 13 is provided with an air cavity 18; an air outlet 19 is provided between the side of the elastic block 13 away from the belt 12 and the air cavity 18.

[0048] An air inlet 20 is provided between the belt 12 and the air chamber 18; both the air inlet 20 and the air outlet 19 are provided with a one-way structure; the one-way structure includes a fixing ring 21 and an elastic sheet 22 attached to one side of the fixing ring 21; one end of the elastic sheet 22 is fixedly connected to the fixing ring 21.

[0049] When the elastic block 13 comes into contact with irregular debris on the surface of the wheel 5 and deforms, it will be squeezed and deformed. The air in the air chamber 18 is squeezed, and the elastic plate 22 in the air outlet 19 deflects outward under pressure. Then, compressed air is ejected from the air outlet 19 at high speed, which can directly act on the small gravel, weeds and other light debris in the tire tread and grooves that are difficult to be physically scraped off by the elastic block 13, forming an airflow sweeping effect and improving the cleaning ability of the tire surface. When the elastic block 13 is no longer squeezed and returns to its original shape, a negative pressure is formed in the air chamber 18. The elastic plate 22 in the air outlet 19 re-attaches to the surface of the fixing ring 21 and seals it. The elastic plate 22 in the air inlet 20 separates from the fixing ring 21 under the action of external atmospheric pressure. Outside air enters the air chamber 18 through the air inlet 20 to prepare for the next jet.

[0050] In one embodiment of the present invention, a self-rescue component is provided on the side of the support frame 4; the self-rescue component includes a support arm 23; one end of the support arm 23 is hinged to the support frame 4, and the other end is fixedly connected to a cabin 24; an electric telescopic rod 25 is hinged between the middle of the support arm 23 and the support frame 4; a self-rescue roller 26 is rotatably connected to the side of the cabin 24; a motor for driving the self-rescue roller 26 is provided inside the cabin 24; a set of soil-collecting plates 27 are evenly distributed on the surface of the self-rescue roller 26.

[0051] When a vehicle gets stuck in muddy or complex road conditions and its tires slip, the self-rescue mechanism can be activated. The electric telescopic rod 25 retracts, causing the support arm 23, the cabin 24, and the self-rescue roller 26 to tilt downwards as a whole, lowering the self-rescue roller 26 to the ground. This brings the soil-collecting plate 27 into contact with the ground. Then, the motor drives the self-rescue roller 26 to rotate. As it rotates, the soil-collecting plate 27 continuously inserts into the ground, grabs soil, and pushes it toward the wheel 5, scattering soil clods into the gap between the tire and the ground to form a soil layer. By increasing the amount of soil accumulated under the tire, the vehicle's posture is raised, while the contact friction between the tire and the ground is improved, reducing slippage.

[0052] In one embodiment of the present invention, the support arm 23 is designed as a hollow structure and is provided with a drag-increasing material inside. The drag-increasing material can be granular materials such as gravel, coarse sand, ceramsite, and broken tiles. The top of the support arm 23 is provided with an inlet 28 for pre-storing the drag-increasing material inside the support arm 23. The bottom of the support arm 23 is provided with a conduit 29 and the conduit 29 is equipped with a control valve. The bottom of the conduit 29 is inclined towards the area between the wheel 5 and the bottom of the self-rescue roller 26.

[0053] When a vehicle gets stuck in mud or soft ground, the soil clods thrown by the self-rescue roller 26 may not form a stable cushion layer due to insufficient weight or low soil viscosity. By opening the control valve at the bottom of the guide tube 29, the drag-increasing material will flow precisely along the inclined guide tube 29 to the bottom of the self-rescue roller 26 and be pushed between the tire and the ground by the rotating soil-taking plate 27. After the drag-increasing material mixes with the soil thrown by the soil-taking plate 27, it can significantly improve the hardness and friction coefficient of the cushion layer, further enhance the grip of the tire and the ground, effectively cope with extremely complex extrication scenarios, and improve the success rate of self-rescue.

[0054] In one embodiment of the present invention, an inner liner 30 is provided inside the support arm 23; a set of elastic members 31 are evenly distributed between the inner liner 30 and the support arm 23; the resistance-increasing material is added inside the inner liner 30; the addition port 28 and the conduit 29 are both connected to the inner liner 30.

[0055] By designing a separate structure for the inner liner 30 and the support arm 23, when the vehicle experiences bumps or vibrations during driving, the inner liner 30 can continuously generate a vibration effect under the action of the elastic element 31. This promotes the mixing, interaction, and friction between the friction-enhancing materials inside, which is beneficial for forming finer friction-enhancing particles. These finer particles can not only fill the soil gaps and tire treads more evenly, reducing the loose space inside the subgrade layer, but also quickly absorb moisture from the mud at the bottom of the tire, transforming the high-moisture-content cohesive soil from a plastic or fluid state into a solid bearing layer. When the tire rolls over it, it forms a tighter interlocking structure with the soil particles, further improving the overall bearing capacity and shear strength of the subgrade layer. At the same time, continuous vibration can effectively prevent the friction-enhancing material from hardening or delaminating due to prolonged static storage, ensuring that the friction-enhancing material can maintain good fluidity when needed, smoothly pass through the conduit 29 and mix with the soil, ensuring the stability and reliability of the friction-enhancing effect.

[0056] A set of friction protrusions 32 are evenly distributed on the inner surface of the inner liner 30.

[0057] The friction protrusions 32 are hemispherical, with a diameter of about 3-5 mm and a height of 2-3 mm. The distance between adjacent protrusions is 10-15 mm. During the process of the friction-enhancing material tumbling and flowing with the vibration of the inner liner 30, the protrusions can significantly increase the contact area and collision frequency with the friction-enhancing material particles, further promoting the breakage of large-sized friction-enhancing materials into small particles.

[0058] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0059] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wheeled tobacco field operation platform with a flexible contour-following chassis, characterized in that: Includes a chassis platform (1) and a set of flexible contour-following wheel systems; The flexible contour-following wheel system is used to adjust the wheel gauge according to the spacing between the rows and furrows in the tobacco field; the flexible contour-following wheel system includes a fixed disc (2), a hydraulic cylinder (3), a support frame (4), wheels (5), and a telescopic axle; The fixed plate (2) is fixedly connected to the side of the chassis platform (1); the fixed plate (2) is fixedly connected to a hydraulic cylinder (3); the output end of the hydraulic cylinder (3) is fixedly connected to a support frame (4); a wheel (5) is installed inside the support frame (4); The telescopic shaft includes an input shaft (6) and an output shaft (7); an expansion cylinder (8) is fixedly connected to the end of the input shaft (6); the expansion cylinder (8) passes through the fixed disk (2) and is rotatably connected to it through a bearing; one end of the output shaft (7) is slidably connected to the inside of the expansion cylinder (8), and the other end is fixedly connected to the wheel (5); the output shaft (7) passes through the support frame (4) and is rotatably connected to it through a bearing; the output shaft (7) and the expansion cylinder (8) are connected by a spline (9) and a keyway.

2. The wheeled tobacco field operation platform with a flexible contour-following chassis according to claim 1, characterized in that: The top of the support frame (4) is provided with a cleaning assembly; the cleaning assembly includes a pair of rollers (10) rotatably connected to the support frame (4); one of the rollers (10) is coaxially connected with a bevel gear (11); a belt (12) is sleeved on the surface of the roller (10); a set of toothed elastic blocks (13) are evenly distributed on the outer side of the belt (12).

3. A wheeled tobacco field operation platform with a flexible contour-following chassis according to claim 2, characterized in that: The output shaft (7) is fixedly connected to a first transmission wheel (14); the top of the support frame (4) is provided with a second transmission wheel (15) and a second bevel gear (16) connected coaxially; the surfaces of the first transmission wheel (14) and the second transmission wheel (15) are fitted with transmission strips (17); the first bevel gear (11) and the second bevel gear (16) mesh with each other.

4. A wheeled tobacco field operation platform with a flexible contour-following chassis according to claim 3, characterized in that: The cleaning components are provided in two parts and are symmetrically distributed about bevel gear two (16).

5. A wheeled tobacco field operation platform with a flexible contour-following chassis according to claim 3, characterized in that: The elastic block (13) has an air chamber (18) inside; an air outlet (19) is provided between the side of the elastic block (13) away from the belt (12) and the air chamber (18).

6. A wheeled tobacco field operation platform with a flexible contour-following chassis according to claim 5, characterized in that: An air inlet (20) is provided between the belt (12) and the air chamber (18); both the air inlet (20) and the air outlet (19) are provided with a one-way structure; the one-way structure includes a fixing ring (21) and an elastic sheet (22) attached to one side of the fixing ring (21).

7. A wheeled tobacco field operation platform with a flexible contour-following chassis according to claim 1, characterized in that: The support frame (4) is provided with a self-rescue component on its side; the self-rescue component includes a support arm (23); one end of the support arm (23) is hinged to the support frame (4), and the other end is fixedly connected to a cabin (24); an electric telescopic rod (25) is hinged between the middle of the support arm (23) and the support frame (4); a self-rescue roller (26) is rotatably connected to the side of the cabin (24); a motor for driving the self-rescue roller (26) is provided inside the cabin (24); a set of soil-collecting plates (27) are evenly distributed on the surface of the self-rescue roller (26).

8. A wheeled tobacco field operation platform with a flexible contour-following chassis according to claim 7, characterized in that: The support arm (23) is designed as a hollow structure and is equipped with a resistance-increasing material inside; the top of the support arm (23) is provided with an addition port (28); the bottom of the support arm (23) is provided with a conduit (29) and the conduit (29) is equipped with a control valve.

9. A wheeled tobacco field operation platform with a flexible contour-following chassis according to claim 8, characterized in that: The support arm (23) is provided with an inner liner (30); a set of elastic elements (31) are evenly distributed between the inner liner (30) and the support arm (23); the resistance-increasing material is added inside the inner liner (30).

10. A wheeled tobacco field operation platform with a flexible contour-following chassis according to claim 9, characterized in that: A set of friction protrusions (32) are evenly distributed on the inner surface of the inner liner (30).

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