Small harvester capable of reducing crop damage

Abstract

The invention relates to the field of small harvesters, in particular to a small harvester capable of reducing crop damage. One end of the rack is provided with a header, and the other end of the rack is provided with a handrail frame; a driving walking wheel and a driven walking wheel are installed at the bottom of the machine frame. A motor used for driving the driving walking wheels to walk is further installed on the machine frame and drives the driving walking wheels to walk. According to the small harvester capable of reducing crop damage, double-belt extrusion conveying and rod falling prevention are adopted for the header, and damage caused by friction or falling in the crop conveying process is reduced; the arc-shaped iron sheets between the threshing rods and the threshing rollers buffer impact force, rigid rolling is avoided through the spirally-distributed threshing rods, and the grain breakage rate is reduced.

Description

Technical Field

[0001] This invention relates to the field of small harvesters, and more particularly to a small harvester that reduces crop damage. Background Technology

[0002] Small harvesters, as key equipment suitable for harvesting small-area crops in hilly areas and greenhouse planting areas, have seen increasing demand in agricultural production in recent years. However, current small harvesters on the market still have many technical shortcomings in practical applications, making it difficult to balance crop harvest quality, operational efficiency, and adaptability to different scenarios. Specific problems are as follows: High crop damage rates and poor harvest quality are common problems with existing small harvesters, which suffer from "rigid contact" design flaws in crop conveying, threshing, and grain collection. Firstly, crop conveying often uses single-belt or hard scraper conveyors. With single-belt conveyors, crops easily slip off the belt edge due to a lack of lateral restraint, while hard scraper conveyors cause severe friction with crop stalks, leading to stalk breakage and leaf damage. Secondly, in the threshing mechanism, the threshing rod is often directly welded to the threshing roller surface without a buffer structure. During threshing, the threshing rod exerts a significant rigid impact force on the crop, especially for full-grained crops (such as wheat and rice), easily causing grain crushing, with a breakage rate typically as high as 8%-15%. Thirdly, grain collection often relies on chain or scraper conveyors. These mechanical conveying methods involve frequent collisions and friction between the grain and conveying components, further increasing grain damage and loss, making it difficult to meet the demands of high-quality harvesting.

[0003] Low automation limits operational efficiency. Most small harvesters currently suffer from disconnected processes in their "harvesting-threshing-separation-collection" workflow: some models require manual handling of harvested crops from the header to the threshing bin, or manual cleaning of threshed straw and grains, resulting in numerous manual intervention steps and poor operational continuity; even the few integrated models suffer from inconvenient key adjustment functions—for example, header height adjustment requires cumbersome operations such as disassembling bolts and replacing shims, making it difficult to quickly adapt to crops of different heights, and the adjustment process is time-consuming and labor-intensive; in addition, crop conveying channels are mostly horizontally designed or lack guiding structures, making it easy for crops to accumulate and clog the channels, requiring frequent shutdowns for cleaning, which seriously affects operational efficiency.

[0004] The existing small harvesters suffer from a contradiction between "low integration" and "insufficient flexibility" due to unreasonable structural layout and poor adaptability to different scenarios. On the one hand, some models, in pursuit of comprehensive functionality, have scattered components such as the header, threshing chamber, and grain bin, resulting in a large overall size, heavy weight, and large turning radius, making it difficult to move flexibly in narrow greenhouse passages or on field ridges in hilly areas. On the other hand, some lightweight models have simplified core functional structures to reduce size—for example, omitting straw discharge channels and adopting open grain collection methods, which requires secondary manual cleaning of straw and makes the grains susceptible to scattering or dampness due to wind and rain. At the same time, the control components (such as the handlebars) of most models are simply designed and lack shock absorption structures. During operation, the vibration of the machine body is transmitted to the operator's hands through the handlebars, which can easily lead to fatigue during long-term operation and further reduce the convenience of operation.

[0005] Therefore, it is necessary to provide a small harvester that reduces crop damage to solve the above-mentioned technical problems. Summary of the Invention

[0006] To address the aforementioned technical problems, the present invention provides a small harvester that reduces crop damage.

[0007] The present invention provides a small harvester for reducing crop damage, comprising a frame; a header is installed at one end of the frame and a handrail is installed at the other end; a drive wheel and a driven wheel are respectively installed at the bottom of the frame; a motor for driving the drive wheel is also installed on the frame, and the motor drives the drive wheel to move; the operator controls the frame through the handrail.

[0008] One end of the cutting platform is provided with a material collection trough, which is connected to a threshing chamber. The threshing chamber includes an arc-shaped outer shell and an arc-shaped filter screen, with a receiving space between the arc-shaped outer shell and the arc-shaped filter screen. An arc-shaped end plate is fixed to the ends of the arc-shaped outer shell and the arc-shaped filter screen. A fixing plate is connected to the outside of the arc-shaped end plate through a connecting rod. A straw discharge port is provided between the fixing plate and the arc-shaped end plate.

[0009] Preferably, a drive motor is fixed on the fixed plate, and a threshing roller is fixedly connected to one end of the drive motor. The end of the threshing roller located in the collection trough is provided with a spiral conveying part. Threshing rods are fixedly distributed along the spiral line on the side wall of the threshing roller, and an arc-shaped iron sheet is fixed between the threshing rods and the threshing roller.

[0010] Preferably, an arc-shaped protective cover is installed on the top of the arc-shaped outer shell, and a material collection section is provided at the bottom of the arc-shaped outer shell. A wind-powered single-tube elevator is installed at one end of the material collection section.

[0011] Preferably, a crop collection container support platform is installed on the frame, and the output end of the wind-powered single-tube hoist is directly opposite the crop collection container support platform.

[0012] Threshing and Separation: Crops enter the threshing chamber through the collection trough. The drive motor rotates the threshing rollers, and the screw conveyor smoothly feeds the crops into the chamber. The spirally distributed threshing rods, together with the arc-shaped iron plate, buffer the threshing process and reduce grain breakage. The threshed mixture is separated in the space containing the arc-shaped outer shell and the arc-shaped filter screen. The grains fall into the bottom collection section through the arc-shaped filter screen, and the straw is discharged from the straw discharge port.

[0013] Grain collection: The grains in the collection section are transported to the crop collection container on the crop collection container carrying platform by a wind-powered single-pipe elevator.

[0014] Preferably, the header includes a header frame, the top of which is equipped with several belt conveyor lines, and two belt conveyor lines form a feeding assembly. The belt conveyor lines include a first belt for extruding and conveying crops, and the crops are conveyed obliquely upward along the gap between the two first belts of the feeding assembly. A guide plate is fixed at the end of the header frame, and the guide plate is located between the ends of the belt conveyor lines at both ends of the header frame and the ends of the adjacent feeding assemblies.

[0015] Preferably, the cutting frame is equipped with a cutting assembly.

[0016] Preferably, the cutting table includes a base frame and several connecting pipes fixed to the top of the base frame. The belt conveyor is installed on the connecting pipes. Both ends of the connecting pipes are rotatably connected to rotating rods, and the connection between the connecting pipe and the rotating rod is located at the center of the rotating rod.

[0017] Preferably, a first pulley and a second pulley are fixed to both ends of the rotating rod, and the first pulleys at both ends of the connecting pipe are connected by a first belt drive, as are the second pulleys at both ends of the connecting pipe. It should be emphasized that the rotating rod can be driven by a motor, but this will not be described in detail here.

[0018] Preferably, a fixing rod is fixed on the connecting pipe, and a third pulley is rotatably connected to the top of the fixing rod. The third pulley is connected to the first pulley via a second belt drive. Anti-detachment rods are provided at equal intervals on the outer side wall of the second belt to prevent crops from detaching. A guide wheel for bringing the two first belts of the feeding assembly closer together is rotatably connected to the rotating rod via a connecting column, and the guide wheel cooperates with the first belt. A protective plate is installed above the belt feeding conveyor line, and the protective plate is fixedly connected to the connecting pipe. The top distance between adjacent belt feeding conveyor lines is equal, and the bottom distance between adjacent belt feeding conveyor lines is also equal. The top distance between adjacent belt feeding conveyor lines is smaller than the bottom distance between adjacent belt feeding conveyor lines.

[0019] Preferably, one end of the cutting table frame is hinged to the machine frame, a support rod is rotatably connected to the cutting table frame, an arc-shaped fixing plate is fixed on the machine frame, and the arc-shaped fixing plate is provided with a plurality of slots that cooperate with the ends of the support rod.

[0020] Crop harvesting and conveying: After the cutting components of the header complete the crop cutting, the two first belts of the belt conveyor line convey the crop obliquely upward through the squeezing gap. The guide plate prevents the crop from scattering, and the anti-detachment rod prevents it from falling off during conveying. The height of the header frame can be adjusted by the slots of the support rod and the arc-shaped fixing plate to adapt to different crop heights.

[0021] Compared with related technologies, the present invention provides the following beneficial effects: The header uses a double-belt extrusion conveyor + anti-detachment rod to reduce damage to crops caused by friction or falling during transport; The arc-shaped iron sheet between the threshing rod and the threshing roller buffers the impact force, and the spirally distributed threshing rod avoids rigid crushing, reducing the grain breakage rate; Wind-powered single-tube hoists use airflow to transport grains, replacing traditional mechanical conveying and reducing collision damage.

[0022] Automation and Improved Operational Efficiency: This enables seamless operation throughout the entire process of "cutting-conveying-threshing-separation-collection," reducing manual intervention. The height of the header can be adjusted via the support rod and slot (manual adjustment) to accommodate different crops (such as wheat and rice); The inclined design of the belt conveyor, combined with the guide plate, prevents crops from accumulating and clogging.

[0023] Compact structure and high practicality: The machine integrates components such as the header, threshing bin, and storage container, with a compact layout, making it suitable for operation in small areas (such as hills and greenhouses). The handrails facilitate manual operation. Attached Figure Description

[0024] Figure 1 This is a top view of the overall structure of the present invention; Figure 2 This is a bottom view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the inner structure of the threshing chamber of the present invention; Figure 4 This is a schematic diagram showing the positions of the arc-shaped outer shell and the arc-shaped filter screen of the present invention; Figure 5 This is a right view of the present invention; Figure 6 This is a top view of the cutting platform of the present invention; Figure 7This is a schematic diagram of the bottom of the cutting platform of the present invention; Figure 8 This is a schematic diagram showing the relative positions of the connecting columns of the present invention; Figure 9 This is a schematic diagram of the second belt structure of the present invention.

[0025] Labels in the diagram: 1. Frame; 2. Cutting table; 3. Handrail; 4. Driven wheel; 5. Driven wheel; 6. Collection trough; 7. Threshing bin; 8. Arc-shaped outer shell; 9. Arc-shaped filter screen; 10. Arc-shaped end plate; 11. Connecting rod; 12. Fixing plate; 13. Straw discharge port; 14. Drive motor; 15. Threshing roller; 16. Screw conveyor; 17. Threshing rod; 18. Arc-shaped iron sheet; 19. Arc-shaped protective cover; 20. Collection section; 21. Pneumatic single-tube elevator; 22. Slot; 2 3. Crop storage container support platform; 24. Cutting table frame; 25. Belt conveyor line; 26. Feeding assembly; 27. First belt; 28. Guide plate; 29. ​​Cutting assembly; 30. Base frame; 31. Connecting pipe; 32. Rotating rod; 33. First pulley; 34. Second pulley; 35. Fixing rod; 36. Third pulley; 37. Second belt; 38. Anti-detachment rod; 39. Connecting column; 40. Guide wheel; 41. Protective plate; 42. Support rod; 43. Arc-shaped fixing plate. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Please refer to the following: Figures 1 to 9 A small harvester that reduces crop damage This harvester uses a frame as its core support, has a compact overall structure, and is suitable for small plots of land. Its specific structure and operating logic are as follows: I. Core Support and Motion Control Structure of the Whole Machine Frame and base component connection: The whole machine is based on a metal frame 1 as the core skeleton. One end of the frame 1 (working end) is fixed with a cutting platform 2 for crop harvesting by bolts, and the other end (control end) is welded with a handrail 3 for the operator to hold. The handle of the handrail 3 can be fitted with a soft shock-absorbing sleeve to reduce the transmission of vibration during operation and improve the stability of operation.

[0028] Walking drive system: The bottom of the frame 1 is symmetrically equipped with active walking wheels 4 and driven walking wheels 5 along its width direction. The active walking wheels 4 are close to the two side edges of the frame 1, and the driven walking wheels 5 are located inside the active walking wheels 4. At the same time, a walking motor is fixedly installed at the bottom of the frame 1 near the active walking wheels 4. The output shaft of the walking motor is connected to the wheel axle of the active walking wheels 4 through a gear or belt transmission mechanism, which can drive the active walking wheels 4 to rotate. The operator controls the walking direction (such as turning, straight-line) and start and stop of the whole machine through the handrail 3, which is suitable for flexible operation in a small range.

[0029] II. Harvesting-Threshing-Separation Core Structure Connection between the collection trough and the threshing bin: The end of the header 2 closest to the inner side of the frame 1 (i.e. the side away from the crop cutting end) is integrally formed or welded to the collection trough 6. The collection trough 6 is designed in an inclined shape, and its end away from the header 2 is sealed and connected to the feed inlet of the threshing bin 7 to ensure that the harvested crop can be completely transported into the threshing bin 7 and avoid scattering.

[0030] The threshing chamber has a double-layer separation structure: The threshing chamber 7 includes an arc-shaped outer shell 8 and an arc-shaped filter screen 9. The arc-shaped outer shell 8 is made of hard metal and serves as protection and support. The arc-shaped filter screen 9 is fixed to the inner side of the arc-shaped outer shell 8, forming an annular receiving space between the two. This space is used to temporarily store the crop to be threshed and the "grain + straw" mixture generated during the threshing process. Arc-shaped end plates 10 are welded to both ends of the arc-shaped outer shell 8 and the arc-shaped filter screen 9 (the ends along their arc length direction). The arc-shaped end plates 10 can seal both ends of the receiving space to prevent the mixture from leaking out from the ends. The side of the arc-shaped end plate 10 away from the arc-shaped outer shell 8 (i.e., the outer side) is welded to a fixed plate 12 through several evenly distributed connecting rods 11. A gap is reserved between the fixed plate 12 and the arc-shaped end plate 10 to form a straw discharge port 13 for the straw after threshing to be discharged.

[0031] Threshing Drive and Damage Prevention Design (Preferred Solution): A drive motor 14 is bolted to the side of the fixed plate 12 away from the arc-shaped end plate 10. The output shaft of the drive motor 14 passes through the fixed plate 12 and is fixedly connected to one end of the threshing roller 15 via a coupling. The other end of the threshing roller 15 extends into the collection trough 6, and a spiral conveying part 16 is sleeved on the outer side of the end located inside the collection trough 6. The spiral blades of the spiral conveying part 16 are made of soft, wear-resistant rubber, which can smoothly push the crop in the collection trough 6 to the threshing chamber 7, avoiding the crop straw from being broken due to hard pushing. Several threshing rods 17 are evenly fixed along the spiral trajectory on the side wall of the threshing roller 15. An arc-shaped iron plate 18 is welded and fixed at the connection between each threshing rod 17 and the threshing roller 15. The arc-shaped iron plate 18 enhances the fixing stability of the threshing rod 17 and buffers the threshing rod 17 through its arc surface. The impact force of contact with crops reduces grain breakage.

[0032] Protective and collecting structure (preferred option): The top of the arc-shaped outer shell 8 is detachably installed with an arc-shaped protective cover 19 by means of buckles or bolts. The protective cover 19 can prevent grains and straw fragments from splashing from the top of the bin during threshing, and at the same time prevent debris from falling into the threshing bin 7 and affecting the operation. The bottom of the arc-shaped outer shell 8 is recessed downward to form a funnel-shaped collecting part 20. A wind-powered single-pipe elevator 21 is installed on the lowest end of the collecting part 20 by means of a flange connection. The feed inlet of the elevator is connected to the inside of the collecting part 20, which can suck in and transport the separated grains.

[0033] Grain collection structure (preferred option): A horizontally set crop collection container support platform 23 is welded and fixed to the top of the frame 1 near the handrail 3. The platform 23 has a flat surface and a retaining edge, which can stably place the crop collection container for collecting grains. The output end (discharge port) of the wind-powered single-tube elevator 21 faces the support platform 23 and is precisely aligned with the opening of the collection container on the platform to ensure that the grains can fall into the container intact and avoid spillage.

[0034] III. Refined Structure of the Cutting Platform (Preferred Solution) Header frame and conveyor assembly: The main body of the header 2 is the header frame 24, which includes a rectangular base frame 30 and several connecting pipes 31. The base frame 30 is a metal frame, and several parallel connecting pipes 31 are evenly welded to its top along the length direction. Each connecting pipe 31 is equipped with a belt conveyor line 25, and two adjacent belt conveyor lines 25 form a feeding assembly 26 for coordinating the transport of crops.

[0035] Compression conveying and anti-scattering design: Each belt feeding conveyor line 25 includes a first belt 27 for contacting the crop. The first belt 27 is made of soft rubber and has a certain elasticity. The two first belts 27 of the feeding assembly 26 are arranged opposite each other to form a gap for compressing the crop. The crop can be conveyed obliquely upward along the gap (the inclination angle is adapted to the height of the header and the position of the collection trough) to avoid the crop shifting during the conveying process. Several guide plates 28 are welded and fixed to the end of the header frame 24 (the end away from the collection trough, i.e. the crop entry end). The guide plates 28 are located on the outer side of the ends of the belt feeding conveyor lines 25 at both ends of the header frame 24 and between the ends of adjacent feeding assemblies 26. They can guide the field crops into the belt gap of the feeding assembly 26 and prevent the crops from scattering to the outside of the conveyor line.

[0036] Cutting components and height adjustment: A cutting component 29 (such as a disc blade with blunted edges to reduce crop stalk breakage damage) is installed at the bottom of the header frame 24 (near the crop entry end) to cut the crop roots; the end of the header frame 24 away from the collection trough 6 is hinged to the end of the frame 1, and the height of the header can be adjusted by rotating up and down around the hinge point; at the same time, a support rod 42 is rotatably connected to the middle of the base frame 30 of the header frame 24, and an arc-shaped fixing plate 43 is welded and fixed to the frame 1 at the position corresponding to the support rod 42. Several slots 22 are evenly opened on the arc-shaped fixing plate 43 along the arc trajectory. The free end of the support rod 42 can be inserted into different slots 22. The tilt angle of the header frame 24 is fixed by changing the position of the insertion, thereby adapting to crops of different heights (such as wheat, rice, rapeseed, etc.).

[0037] Conveying and transmission structure: Both ends of the connecting pipe 31 are rotatably connected to a rotating rod 32 via bearings, and the connection point is located at the center of the rotating rod 32, allowing the rotating rod 32 to rotate bidirectionally around the connection point; a first pulley 33 and a second pulley 34 are welded and fixed to both ends of the rotating rod 32 respectively—the first pulleys 33 at both ends of the same connecting pipe 31 are connected by a first belt 27, and the second pulleys 34 at both ends are also connected by another first belt 27, forming a belt drive circuit; a fixed rod 35 is vertically welded to the side of the connecting pipe 31 near the inner side of the feeding assembly 26, and a third pulley 36 is rotatably connected to the top of the fixed rod 35 via a bearing. The third pulley 36 and the first pulley 33 on the same side are connected by a second belt 37, and anti-detachment rods 38 are fixed at equal intervals along the length of the outer wall of the second belt 37—the anti-detachment rods 38 are made of elastic plastic material and can prevent crops from detaching from the edge of the belt during conveying; a connecting post 39 is also connected to the rotating rod 32. A guide wheel 40 is rotatably connected. The wheel surface of the guide wheel 40 is covered with a soft rubber layer and is in contact with the outer wall of the first belt 27. By squeezing the first belt 27, the two first belts 27 of the feeding assembly 26 are brought closer to each other to ensure the squeezing conveying effect. In addition, a protective plate 41 is welded and fixed to each connecting pipe 31. The protective plate 41 is located above the belt feeding conveyor line 25 to prevent crops from popping up during the conveying process and to prevent debris from falling into the belt gap. The top spacing (the end near the collection trough) of adjacent belt feeding conveyor lines 25 is equal, and the bottom spacing (the end near the crop entry end) is also equal. The top spacing is smaller than the bottom spacing, so that the crops gradually gather during the conveying process, further reducing scattering and damage.

[0038] Conveying drive supplement: One end of the rotating rod 32 can be connected to the output shaft of an independent conveying motor via a coupling (the motor installation position can be adapted according to the space of the frame, and no detailed limitation is made here). The rotating rod 32 is driven to rotate by the motor, which in turn drives the first pulley 33, the second pulley 34 and each belt to rotate, so as to realize the continuous conveying of crops.

[0039] IV. Core Workflow (Supplemented with Structure) Crop harvesting and conveying: The operator controls the movement of the whole machine through the handrail 3. The cutting component 29 of the header 2 cuts off the crop roots. At the same time, the conveyor motor drives the rotating rod 32 to rotate, which drives the first belt 27 of the belt feeding conveyor line 25 to run. The crop enters the belt gap of the feeding component 26 under the guidance of the guide plate 28. It is squeezed by the two first belts 27 and conveyed in an upward direction. The anti-detachment rod 38 and the protective plate 41 prevent the crop from detaching. The spacing design of the adjacent conveyor lines makes the crops gradually gather together. If it is necessary to adapt to different crop heights, the locking position of the support rod 42 in the slot 22 of the arc-shaped fixing plate 43 can be adjusted to change the tilt angle of the header frame 24.

[0040] Threshing and Separation: The crops conveyed to the collection trough 6 are pushed smoothly into the threshing chamber 7 by the spiral conveyor section 16 of the threshing roller 15 (the soft material of the spiral blades reduces damage); the drive motor 14 drives the threshing roller 15 to rotate, and the spirally distributed threshing rods 17 thresh the crops. The arc-shaped iron plate 18 between the threshing rods 17 and the threshing roller 15 buffers the impact force and reduces the grain breakage rate; the threshed mixture (grains + straw) moves in the collection space. The grains fall into the bottom funnel-shaped collection section 20 through the mesh of the arc-shaped filter screen 9, while the straw is discharged from the straw discharge port 13 between the fixed plate 12 and the arc-shaped end plate 10 under the push of the threshing roller.

[0041] Grain collection: The grains in the collection section 20 are sucked into the elevator and transported to its output end by the suction of the wind-powered single-tube elevator 21, and finally fall into the crop collection container on the support platform 23 of the frame 1, completing the entire process of "harvesting-transporting-threshing-separation-collection".

[0042] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A small harvester that reduces crop damage, characterized in that, The machine includes a frame (1); a cutting table (2) is installed at one end of the frame (1), and a handrail (3) is installed at the other end; a driving wheel (4) and a driven wheel (5) are respectively installed at the bottom of the frame (1); a material collection trough (6) is provided at one end of the cutting table (2), and the material collection trough (6) is connected to a threshing chamber (7). The threshing chamber (7) includes an arc-shaped outer shell (8) and an arc-shaped filter screen (9). There is a space between the arc-shaped outer shell (8) and the arc-shaped filter screen (9); an arc-shaped end plate (10) is fixed at the end of the arc-shaped outer shell (8) and the arc-shaped filter screen (9). A fixing plate (12) is connected to the outside of the arc-shaped end plate (10) through a connecting rod (11). A straw discharge port (13) is provided between the fixing plate (12) and the arc-shaped end plate (10).

2. A small harvester for reducing crop damage according to claim 1, characterized in that, A drive motor (14) is fixed on the fixed plate (12). One end of the drive motor (14) is fixedly connected to a threshing roller (15). The threshing roller (15) is provided with a spiral conveying part (16) at one end inside the collection trough (6). Threshing rods (17) are fixedly distributed along the spiral line on the side wall of the threshing roller (15). An arc-shaped iron sheet (18) is fixed between the threshing rod (17) and the threshing roller (15).

3. A small harvester for reducing crop damage according to claim 2, characterized in that, The top of the arc-shaped outer shell (8) is equipped with an arc-shaped protective cover (19), and the bottom of the arc-shaped outer shell (8) is provided with a material collection part (20). One end of the material collection part (20) is equipped with a wind-powered single-tube elevator (21).

4. A small harvester for reducing crop damage according to claim 3, characterized in that, The frame (1) is equipped with a crop storage container carrying platform (23), and the output end of the wind-powered single-tube hoist (21) is directly facing the crop storage container carrying platform (23).

5. A small harvester for reducing crop damage according to claim 4, characterized in that, The cutting table (2) includes a cutting table frame (24), and several belt feeding conveyors (25) are installed on the top of the cutting table frame (24). Two belt feeding conveyors (25) form a feeding assembly (26). The belt feeding conveyor (25) includes a first belt (27) for extruding and conveying crops. The crops are conveyed obliquely upward along the gap between the two first belts (27) of the feeding assembly (26). A guide plate (28) is fixed at the end of the cutting table frame (24). The guide plate (28) is located between the ends of the belt feeding conveyors (25) at both ends of the cutting table frame (24) and the ends of the adjacent feeding assemblies (26).

6. A small harvester for reducing crop damage according to claim 5, characterized in that, The cutting assembly (29) is mounted on the cutting table (24).

7. A small harvester for reducing crop damage according to claim 6, characterized in that, The cutting table frame (24) includes a base frame (30) and several connecting pipes (31) fixed on the top of the base frame (30). The belt conveyor (25) is installed on the connecting pipes (31). Both ends of the connecting pipes (31) are rotatably connected to rotating rods (32), and the connection between the connecting pipes (31) and the rotating rods (32) is located at the center of the rotating rods (32).

8. A small harvester for reducing crop damage according to claim 7, characterized in that, The rotating rod (32) has a first pulley (33) and a second pulley (34) fixed at both ends respectively. The first pulley (33) at both ends of the connecting pipe (31) is connected by a first belt (27) for transmission. The second pulley (34) at both ends of the connecting pipe (31) is also connected by a first belt (27) for transmission.

9. A small harvester for reducing crop damage according to claim 8, characterized in that, A fixing rod (35) is fixed on the connecting pipe (31). A third pulley (36) is rotatably connected to the top of the fixing rod (35). The third pulley (36) is connected to the first pulley (33) via a second belt (37). Anti-detachment rods (38) are provided at equal intervals on the outer side wall of the second belt (37) to prevent the crop from detaching. The rotating rod (32) is rotatably connected via a connecting column (39) to two first belts (27) of the feeding assembly (26) for mutual connection. The guide wheel (40) is close to the first belt (27) and the guide wheel (40) cooperates with the first belt (27); a protective plate (41) is installed above the belt feeding conveyor (25) and the protective plate (41) is fixedly connected to the connecting pipe (31). The top distance between adjacent belt feeding conveyors (25) is equal, the bottom distance between adjacent belt feeding conveyors (25) is also equal, and the top distance between adjacent belt feeding conveyors (25) is smaller than the bottom distance between adjacent belt feeding conveyors (25).

10. A small harvester for reducing crop damage according to claim 8, characterized in that, One end of the cutting table frame (24) is hinged to the frame (1). A support rod (42) is rotatably connected to the cutting table frame (24). An arc-shaped fixing plate (43) is fixed on the frame (1). The arc-shaped fixing plate (43) is provided with several slots (22) that cooperate with the end of the support rod (42).

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