A suction type rice machine harvesting and reaping damage reducing device

Abstract

The present application relates to rice harvesting technical field, specifically is related to a kind of wind suction type rice machine harvesting machine cutting loss reduction device, including first shovel and recovery mechanism, recovery mechanism includes recovery cavity, and the top and bottom of recovery cavity are respectively provided with discharge port and feed port;Two ends of recovery cavity are provided with discharge port;Screening roller and negative pressure suction fan mechanism are arranged on recovery cavity, by setting recovery mechanism in the rear end of first shovel, the rice left on the ground after harvesting can be targeted recovery, effectively reduce the loss of rice in the harvesting process;Impurities are pushed to the two ends of recovery cavity by rotating screening roller and discharged, can realize the separation of rice grain and impurities in the recovery process, reduce the influence of impurities on subsequent processing, ensure the purity of recovered rice;Negative pressure suction fan and discharge port cooperate, can efficiently transport separated rice grain to first shovel, realize the centralized processing of recovered rice and main harvesting rice.

Description

Technical Field

[0001] This invention relates to the field of rice harvesting technology, specifically to a wind-suction type rice harvesting and cutting loss reduction device. Background Technology

[0002] With the rapid development of the social economy and the increasing demand for large-scale agricultural production, the importance of agricultural mechanization has become increasingly prominent, especially in the rice planting sector. Traditional manual rice harvesting methods are inefficient and labor-intensive, making it difficult to meet the efficiency and yield requirements of modern agricultural production. Therefore, mechanized rice harvesters have emerged. Although rice harvesters on the market have achieved mechanization of the harvesting process, some traditional models still have significant shortcomings, such as low harvesting efficiency, high grain loss rate during rice harvesting, and poor ease of operation, failing to fully adapt to the complex working environment of rice fields and the production needs of large-scale planting. For example, an automatic rice harvester disclosed in Chinese Patent Publication No. CN109089525B automates the rice harvesting process by setting up components such as a rice-picking device, a harvesting device, a threshing device, and a separating device. It has made some progress in improving production efficiency, reducing the loss rate after hulling, and simplifying operation. However, in practical applications, there is still room for optimization in the recycling and treatment of residual rice on the ground during the rice harvesting process. Existing equipment does not fully recycle the residual rice that is scattered or lodged after harvesting, which easily causes grain loss and makes it difficult to further improve the overall recycling rate of rice harvesting. It cannot fully meet the high standards of agricultural production for reducing losses during mechanized rice harvesting. Summary of the Invention

[0003] To address the aforementioned issues, a wind-suction rice harvester loss reduction device is provided. By setting a recycling mechanism at the rear end of the first bucket, it can specifically collect the rice residue remaining on the ground after harvesting, effectively reducing rice loss during the harvesting process. The screening roller pushes impurities to both ends of the recycling chamber through rotation, achieving separation of rice grains and impurities during the recycling process, reducing the impact of impurities on subsequent processing, and ensuring the purity of the recycled rice. The negative pressure adsorption fan, in conjunction with the discharge port, can efficiently transport the separated rice grains to the first bucket, realizing centralized processing of recycled rice and the main harvested rice.

[0004] To address the problems of existing technologies, this invention provides a wind-suction type rice harvester with reduced loss, comprising a first bucket for harvesting rice plants, a recovery mechanism at the rear end of the first bucket, the recovery mechanism including a recovery chamber, a feed inlet extending horizontally at the bottom of the recovery chamber, a rotatable screening roller inside the recovery chamber for screening the rice entering the recovery chamber by rotation, and discharge ports at both ends of the recovery chamber; a negative pressure adsorption fan at the top of the recovery chamber, and a discharge port communicating with the inside of the first bucket at the top of the recovery chamber, the negative pressure adsorption fan adsorbing the rice grains separated during the screening process by the screening roller and conveying them into the first bucket through the discharge port.

[0005] Preferably, the recovery chamber is divided into a feeding section extending horizontally and a collecting section extending upward at an angle. The inner wall of the collecting section is provided with an arc-shaped guide surface, which is adapted to the suction direction of the negative pressure adsorption fan. The screening roller is set in the feeding section.

[0006] Preferably, a filter screen for blocking impurities in rice is provided between the feed section and the collection section of the recovery chamber.

[0007] Preferably, a conveying channel extending along the rice harvesting direction is provided in the center of the first bucket. One end of the conveying channel is connected to the first bucket, and the other end of the conveying channel leads to the subsequent processing mechanism of the harvester. A conveyor belt is rotatably installed inside the conveying channel.

[0008] Preferably, the recovery chamber has two discharge ports, which are located on both sides of the conveying channel.

[0009] Preferably, the central area of ​​the screening roller is provided with a spiral blade that is fixedly connected to it, and the spiral blade has a bidirectional spiral structure.

[0010] Preferably, multiple protrusions are evenly distributed on the outer circumferential surface of the screening roller, and the multiple protrusions extend in a spiral shape along the axis of the screening roller, forming a screening gap between two adjacent protrusions for rice grains to pass through.

[0011] Preferably, a rotatable feed roller is also provided on the recovery chamber at the feed inlet.

[0012] Preferably, the feed inlet of the recycling mechanism is provided with multiple feeding teeth that are equidistantly distributed along its length.

[0013] Preferably, a trapezoidal guide plate is provided in the central area of ​​the multiple feeding teeth and is fixedly connected to the recycling mechanism. The guide plate is used to guide the rice gathered in the central area to both sides of the recycling mechanism.

[0014] The advantages of this invention compared to the prior art are:

[0015] 1. This invention, by setting a recycling mechanism at the rear end of the first bucket, can specifically recycle rice residue on the ground after harvesting, effectively reducing rice loss during the harvesting process; the screening roller, through rotation, pushes impurities to both ends of the recycling chamber for discharge, achieving separation of rice grains and impurities during recycling, reducing the impact of impurities on subsequent processing, and ensuring the purity of the recycled rice; the negative pressure adsorption fan, in conjunction with the discharge port, can efficiently transport the separated rice grains to the first bucket, realizing centralized processing of recycled rice and main harvested rice. The overall structure works in tandem with the first bucket, significantly improving the overall rice harvesting recovery rate without interfering with the main harvesting operation.

[0016] 2. This invention, by installing a filter screen between the feeding section and the collecting section, further improves the purity of the recovered material, reduces the interference of impurities entering the collecting section on the negative pressure adsorption fan, lowers the risk of wear or blockage of the fan due to impurities being drawn in, and also avoids poor conveying caused by impurities accumulating at the discharge port, making the conveying process of rice grains from the collecting section to the first bucket smoother. This secondary filtration setup works synergistically with the initial separation of the screening rollers, making the impurity separation effect of the entire recovery mechanism more thorough, ensuring the quality of the recovered rice, extending the service life of each component of the device, and enhancing the stability and practicality of the loss reduction device in continuous operation.

[0017] 3. This invention transforms the feeding process of the recycling chamber from passive waiting to active grasping by setting up the feeding roller, which can more effectively collect residual rice on the ground, especially for lodged or scattered rice. It avoids the problem of insufficient feeding caused by relying solely on negative pressure adsorption, thus improving the collection efficiency of residual rice on the ground. At the same time, the rotation of the feeding roller can control the speed and rhythm of the material entering the recycling chamber, avoiding blockage caused by a sudden influx of material. This allows the material to coordinate more effectively with the screening action of the screening roller after entering, ensuring a stable screening process. In turn, it improves the working efficiency and loss reduction effect of the entire recycling mechanism, allowing more residual rice to be effectively recycled. Attached Figure Description

[0018] Figure 1 A schematic diagram of a three-dimensional structure of a wind-suction type rice harvester and cutter damage reduction device. Figure 1 .

[0019] Figure 2 A schematic diagram of a three-dimensional structure of a wind-suction type rice harvester and cutter damage reduction device. Figure 2 .

[0020] Figure 3 A cross-sectional view of a wind-suction type rice harvester loss reduction device. Figure 1 .

[0021] Figure 4A cross-sectional view of a wind-suction type rice harvester loss reduction device. Figure 2 .

[0022] Figure 5 This is a cross-sectional schematic diagram of the recycling mechanism in a wind-suction rice harvesting and cutting loss reduction device.

[0023] Figure 6 This is a three-dimensional cross-sectional structural diagram of the recycling mechanism in a wind-suction type rice harvester and cutter loss reduction device.

[0024] Figure 7 yes Figure 6 Enlarged view of point A in the middle.

[0025] Figure 8 A three-dimensional structural diagram of the recycling mechanism in a wind-suction rice harvester loss reduction device. Figure 1 .

[0026] Figure 9 A three-dimensional structural diagram of the recycling mechanism in a wind-suction rice harvester loss reduction device. Figure 2 .

[0027] Figure 10 A three-dimensional structural diagram of the recycling mechanism in a wind-suction rice harvester loss reduction device. Figure 3 .

[0028] The following are the labels in the diagram: 1. First bucket; 11. Conveying channel; 111. Conveyor belt; 2. Recycling mechanism; 21. Recycling chamber; 211. Feeding section; 2111. Filter screen; 212. Collecting section; 213. Feed inlet; 2131. Feed roller; 214. Screening roller; 2141. Spiral blade; 2142. Protrusion; 215. Discharge port; 216. Discharge outlet; 217. Feeding teeth; 218. Guide plate; 22. Negative pressure adsorption mechanism. Detailed Implementation

[0029] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figures 1 to 4 , Figures 8 to 10As shown: A wind-suction type rice harvester with reduced cutting losses includes a first bucket 1 for harvesting rice plants. A recovery mechanism 2 is provided at the rear end of the first bucket 1. The recovery mechanism 2 includes a recovery chamber 21. A feed inlet 213 extending horizontally is provided at the bottom of the recovery chamber 21. A rotatable screening roller 214 is provided inside the recovery chamber 21. The screening roller 214 screens the rice entering the recovery chamber 21 by rotating. Both ends of the recovery chamber 21 are provided with discharge ports 215. A negative pressure adsorption fan is provided at the top of the recovery chamber 21. A discharge port 216 communicating with the inside of the first bucket 1 is also provided at the top of the recovery chamber 21. The rice grains separated during the screening process by the screening roller 214 are adsorbed by the negative pressure adsorption fan and transported to the first bucket 1 through the discharge port 216.

[0031] When the device is working, the first bucket 1 first harvests the rice plants in the field. After the first bucket 1 finishes harvesting and moves forward, the remaining rice on the ground will enter the interior of the recycling chamber 21 through the feed inlet 213 extending horizontally at the bottom of the recycling chamber 21. At this time, the screening roller 214 inside the recycling chamber 21 will start to rotate. During the rotation, the rice entering the recycling chamber 21 will be screened to separate impurities such as straw and soil from the rice. The separated impurities will be guided to the discharge outlets 215 at both ends of the recycling chamber 21 as the screening roller 214 rotates, and finally discharged from the recycling chamber 21 through the discharge outlets 215. At the same time, the negative pressure adsorption fan at the top of the recycling chamber 21 starts to generate negative pressure, adsorbing the rice grains separated by the screening roller 214. The adsorbed rice grains will then be transported to the first bucket 1 through the discharge outlet 216 at the top of the recycling chamber 21, which is connected to the interior of the first bucket 1, and merge with the rice harvested by the first bucket 1 to enter the subsequent processing stage.

[0032] The device, by setting a recycling mechanism 2 at the rear end of the first bucket 1, can specifically recycle rice residue on the ground after harvesting, effectively reducing rice loss during the harvesting process. The screening roller 214 pushes impurities to both ends of the recycling chamber 21 by rotating, which can separate rice grains from impurities during the recycling process, reduce the impact of impurities on subsequent processing, and ensure the purity of the recycled rice. The negative pressure adsorption fan, in conjunction with the discharge port 216, can efficiently transport the separated rice grains to the first bucket 1, realizing the centralized processing of recycled rice and main harvested rice. The overall structure works in tandem with the first bucket 1, significantly improving the overall rice harvesting recovery rate without interfering with the main harvesting operation.

[0033] like Figures 1 to 8 As shown: the recovery chamber 21 is divided into a feeding section 211 extending horizontally and a collecting section 212 extending upward at an incline. The inner wall of the collecting section 212 is provided with an arc-shaped guide surface, which is adapted to the suction direction of the negative pressure adsorption fan. The screening roller 214 is set in the feeding section 211.

[0034] The feed section 211 of the recycling chamber 21 extends horizontally, providing a stable installation space and working environment for the screening roller 214. When the feed roller 2131 drives the residual rice on the ground into the recycling chamber 21, the rice first enters the horizontally set feed section 211. The screening roller 214 rotates in the feed section 211, which can more stably screen the rice and reduce the problem of rice accumulation or uneven screening that may be caused by the tilt of the chamber. This allows impurities to be discharged more smoothly to both ends of the recycling chamber 21, while the rice grains remain in the feed section 211. The collection section 212 extends upward at an angle, forming a continuous rice conveying path with the horizontal feed section 211. When the negative pressure adsorption fan is working, the arc-shaped guide surface on the inner wall of the collection section 212 is adapted to the fan's suction direction, guiding the airflow along the arc-shaped surface to form a more stable flow path. This reduces turbulence within the collection section 212, allowing the rice grains in the feed section 211 to enter the collection section 212 more smoothly under negative pressure and be guided to the discharge port 216 along the arc-shaped guide surface, reducing grain residue on the inner wall of the collection section 212. This structural design allows the feeding, screening, and collection functions of the recovery chamber 21 to be organically coordinated through optimized spatial layout. It ensures efficient screening by the screening roller 214 and, through the synergy of the arc-shaped guide surface and the inclined collection section 212, improves the conveying efficiency of the negative pressure adsorption fan for rice grains, reduces grain loss during the recovery process, and further enhances the practicality and reliability of the entire loss reduction device.

[0035] like Figures 2 to 7 As shown: A filter screen 2111 for blocking impurities in rice is provided between the feed section 211 and the collection section 212 of the recovery chamber 21.

[0036] By setting up a filter screen 2111 between the feeding section 211 and the collecting section 212, an impurity interception barrier is formed during the rice recycling process. After the screening roller 214 screens the material in the feeding section 211, some small impurities that are not completely separated may move towards the collecting section 212 along with the rice grains. At this time, the filter screen 2111 will block these impurities, allowing only the rice grains to pass through the filter screen 2111 and enter the collecting section 212. Thus, secondary filtration is achieved on the basis of the initial separation by the screening roller 214, ensuring that the material entering the collecting section 212 is mainly rice grains.

[0037] The filter screen 2111 further improves the purity of the recycled material, reduces the interference of impurities entering the collection section 212 on the negative pressure adsorption fan, and lowers the risk of wear or blockage of the fan due to impurities. It also avoids obstructed transport caused by impurities accumulating at the discharge port 216, making the transport of rice grains from the collection section 212 to the first bucket 1 smoother. This secondary filtration setup, in conjunction with the initial separation by the screening roller 214, ensures a more thorough impurity separation effect throughout the entire recycling mechanism 2, guarantees the quality of the recycled rice, extends the service life of each component of the device, and enhances the stability and practicality of the loss reduction device in continuous operation.

[0038] like Figures 1 to 6 As shown: A conveying channel 11 extending along the rice harvesting direction is provided in the center of the first bucket 1. One end of the conveying channel 11 is connected to the first bucket 1, and the other end of the conveying channel 11 leads to the subsequent processing mechanism of the harvester. A conveyor belt 111 is rotatably installed inside the conveying channel 11.

[0039] The rice collected by the first bucket 1 during the harvesting process will enter the conveying channel 11 through the end of the first bucket 1 connected to the conveying channel 11. At this time, the conveyor belt 111 inside the conveying channel 11 will rotate. The rotating conveyor belt 111 will drive the rice that has entered the conveying channel 11 to move along the extension direction of the conveying channel 11. Finally, the rice will be moved from the other end of the conveying channel 11 to the subsequent processing mechanism of the harvester, so that the rice collected by the first bucket 1 can enter the subsequent processing stage in an orderly manner.

[0040] The conveyor channel 11 provides a dedicated transport path for the rice collected in the first bucket 1, preventing the rice from piling up randomly in the first bucket 1 and causing transport obstructions. The rotation of the conveyor belt 111 actively moves the rice, ensuring the continuity and stability of the transport process and reducing rice retention and loss during transport. At the same time, the conveyor channel 11 directly connects the first bucket 1 to the subsequent processing mechanism of the harvester, allowing the harvested rice to quickly proceed to the next processing step.

[0041] like Figures 2 to 9 As shown: There are two discharge ports 216 on the recovery chamber 21, and the two discharge ports 216 are located on both sides of the conveying channel 11 respectively.

[0042] The rice grains adsorbed by the negative pressure adsorption fan in the recycling mechanism 2 will be discharged into the first bucket 1 through two discharge ports 216. Since the two discharge ports 216 are located on both sides of the conveying channel 11, the rice grains will merge with the rice in the first bucket 1 after entering the first bucket 1. Then, driven by the rotation of the conveyor belt 111 in the conveying channel 11, they will move together to the subsequent processing mechanism of the harvester.

[0043] By setting the two discharge ports 216 on both sides of the conveying channel 11, the recovered rice grains can enter evenly from both sides of the conveying channel 11, avoiding the accumulation of rice in the channel due to unilateral feeding, ensuring a more uniform distribution of rice in the conveying channel 11, and reducing conveying blockage or grain damage caused by local accumulation. At the same time, the feeding method on both sides is coordinated with the conveying direction of the conveyor belt 111 in the conveying channel 11, making the convergence of recovered rice and harvested rice smoother. The efficient mixing of the two can be achieved without additional flow guiding structures, further improving the overall conveying efficiency of the conveying channel 11, and also making the cooperation between the recovery mechanism 2 and the first bucket 1 closer, ensuring that the entire loss reduction device can continuously and stably complete the collection and conveying of rice during the harvesting process, reducing grain loss in the harvesting stage.

[0044] like Figures 3 to 7 As shown: The central area of ​​the screening roller 214 is provided with a spiral blade 2141 fixedly connected thereto, and the spiral blade 2141 has a bidirectional spiral structure.

[0045] When the screening roller 214 rotates, the bidirectional spiral blade 2141 fixedly connected in the central area rotates synchronously with the screening roller 214. Since the conveying channel 11 is set in the center of the first bucket 1, it is inconvenient for rice entering from the middle of the recovery chamber 21 to enter the first bucket 1 from the center. Through the setting of the bidirectional spiral blade 2141, the spiral blade 2141 can generate a pushing force on the rice entering the recovery chamber 21 from the center of the feed inlet 213 towards both ends of the screening roller 214, so that the rice originally gathered in the center of the screening roller 214 is evenly distributed to both sides of the screening roller 214, so that the rice can cover the entire length of the screening roller 214. Subsequently, the rice pushed to both sides continues to be screened under the rotation of the screening roller 214. The separated impurities will move and be discharged from the discharge outlets 215 at both ends of the recovery chamber 21, while the separated rice grains will remain in the recovery chamber 21, waiting for the negative pressure adsorption fan to adsorb and transport them.

[0046] The bidirectional spiral blades 2141 solve the problem of rice accumulating in the center of the screening roller 214 when entering from the middle of the recovery chamber 21. This avoids incomplete screening or reduced screening efficiency due to excessive rice in certain areas, allowing the rice to be more evenly distributed on the screening roller 214. This ensures that each section of the screening roller 214 can fully perform its screening function, improving the overall screening effect. At the same time, the pushing process to both ends is synchronized with the screening action of the screening roller 214, requiring no additional power drive. This simplifies the structure while ensuring the continuity of material conveying and screening. The evenly distributed rice also reduces the entrainment of impurities caused by local accumulation, further improving the purity of the separated rice grains. Combined with the adsorption function of the negative pressure adsorption fan, this makes the subsequent conveying of rice grains smoother, reducing the risk of blockage at the discharge port 216 due to uneven grain distribution. Ultimately, this enhances the loss reduction effect and operational stability of the entire recovery mechanism 2.

[0047] like Figures 3 to 7 As shown: Multiple protrusions 2142 are evenly distributed on the outer circumferential surface of the screening roller 214, and the multiple protrusions 2142 extend spirally along the axis of the screening roller 214, forming a screening gap between two adjacent protrusions 2142 for rice grains to pass through.

[0048] After the rice enters the recycling chamber 21, the screening roller 214 rotates. At this time, multiple protrusions 2142 evenly distributed on the outer circumference of the screening roller 214 rotate synchronously with the screening roller 214. Since the protrusions 2142 extend spirally along the axis of the screening roller 214, they will generate an axial pushing force on the material entering the feed section 211 during the rotation process, driving the material to move towards the end of the recycling chamber 21 along the length direction of the screening roller 214. At the same time, the screening gap formed between adjacent protrusions 2142 can screen the recycled rice, allowing rice grains of suitable size to fall through the gap and remain in the recycling chamber 21, while larger impurities such as straw and soil clods are blocked by the protrusions 2142 and continue to move towards the end of the recycling chamber 21 along the spiral pushing direction, and finally discharged from the discharge port 215 at the end of the recycling chamber 21.

[0049] The spirally extending protrusions 2142 not only achieve axial conveying of materials, but also separate rice grains from impurities through the screening gaps formed by adjacent protrusions 2142, allowing the screening and conveying processes to proceed simultaneously and improving the working efficiency of the recovery mechanism 2. The evenly distributed protrusions 2142 ensure that the material is subjected to more balanced force during the screening process, avoiding uneven screening caused by local accumulation, ensuring that more rice grains can be retained through the gaps, and reducing grain loss caused by incomplete screening. At the same time, the existence of the screening gaps makes the separation of impurities from grains more thorough, reducing interference caused by impurities during subsequent negative pressure adsorption and conveying processes, further ensuring the purity of the recovered rice, and enhancing the practical effect of the entire loss reduction device.

[0050] like Figures 1 to 4 , Figure 8 and Figure 9 As shown: A rotatable feed roller 2131 is also provided on the recovery chamber 21 at the feed inlet 213.

[0051] When the feed roller 2131 rotates, it will actively contact the rice residue on the ground. Through the rotation action, it will push the rice towards and send it into the feed port 213 at the bottom of the recycling chamber 21, so that the rice residue on the ground can enter the recycling chamber 21 more smoothly, providing a stable material source for the subsequent screening operation of the screening roller 214.

[0052] By setting up the feed roller 2131, the feeding process of the recycling chamber 21 is changed from passive waiting to active grabbing, which can more effectively collect residual rice on the ground, especially for lodged and scattered rice. This avoids the problem of insufficient feeding caused by relying solely on negative pressure adsorption, and improves the collection efficiency of residual rice on the ground. At the same time, the rotation of the feed roller 2131 can control the speed and rhythm of the material entering the recycling chamber 21, avoiding blockage of the recycling chamber 21 caused by a sudden large influx of material. This allows the material to cooperate more coordinatedly with the screening action of the screening roller 214 after entering, ensuring a stable screening process. This, in turn, improves the working efficiency and loss reduction effect of the entire recycling mechanism 2, allowing more residual rice to be effectively recycled.

[0053] The feed roller 2131 can be powered by an independent drive device or connected to the harvesting mechanism inside the first bucket 1.

[0054] like Figure 1 , Figure 2 , Figures 8 to 10 As shown: The feed inlet 213 of the recycling mechanism 2 is provided with a plurality of feeding teeth 217 that are equidistantly distributed along its length.

[0055] As the harvester moves forward, the multiple equidistant, length-direction-distributed feeding teeth 217 at the feed inlet 213 of the recycling mechanism 2 will move synchronously. The structure of the feeding teeth 217 will pick up the scattered and fallen rice residue on the ground. At the same time, since the feeding teeth 217 are equidistantly distributed and arranged along the length direction of the feed inlet 213, they can evenly contact the rice residue in different positions, comb and gather the originally scattered rice, and guide it to the feed inlet 213, so that the rice can enter the recycling chamber 21 more smoothly.

[0056] By setting multiple feeding teeth 217, it is ensured that residual rice in each area along the length of the feed inlet 213 can be effectively contacted and processed, avoiding rice leakage due to the lack of feeding teeth 217 in some areas. At the same time, the distribution along the length direction covers the entire width of the feed inlet 213, allowing residual rice in different positions to be guided to the recycling chamber 21, reducing the loss of residual rice on the ground. The combing and gathering effect prevents the rice from tangling into clumps, making the rice entering the recycling chamber 21 more evenly distributed, which facilitates efficient screening by the subsequent screening roller 214. This forms a better cooperation with the screening and adsorption links of the recycling mechanism 2, further improving the recycling efficiency and effect of the entire recycling mechanism 2 in recovering residual rice.

[0057] like Figure 1 , Figure 2 , Figures 8 to 10 As shown: A trapezoidal guide plate 218 is provided in the central area of ​​multiple feeding teeth 217 and is fixedly connected to the recycling mechanism 2. The guide plate is used to guide the rice gathered in the central area to both sides of the recycling mechanism 2.

[0058] When the recycling mechanism 2 is working, the feeding teeth 217 pick up the residual rice on the ground and convey it to the recycling chamber 21. During this process, the rice tends to accumulate in the central area of ​​the feeding teeth 217. At this time, the trapezoidal guide plate 218 in the central area of ​​the feeding teeth 217 guides the rice accumulated in the center to both sides of the recycling mechanism 2 through the inclined surfaces on both sides, so that the rice is evenly distributed along the width of the recycling mechanism 2. This avoids the problem of insufficient processing on both sides caused by the accumulation of rice in the center of the recycling mechanism 2, allowing the subsequent stages of the recycling mechanism 2 such as screening and adsorption to process the material more evenly and improve the recycling efficiency of each area. At the same time, the evenly distributed rice reduces local load differences, making the operation of the recycling mechanism 2 more stable, further enhancing the recycling effect of residual rice on the ground and reducing grain loss during the harvesting process.

[0059] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A wind-suction type rice harvester with reduced loss device, comprising a first bucket (1) for harvesting rice plants, characterized in that, The rear end of the first bucket (1) is provided with a recovery mechanism (2), which includes a recovery chamber (21) and a feed inlet (213) extending horizontally at the bottom of the recovery chamber (21); The recycling chamber (21) is equipped with a rotating screening roller (214). The screening roller (214) screens the rice entering the recycling chamber (21) by rotating. Both ends of the recycling chamber (21) are equipped with discharge ports (215). A negative pressure adsorption fan is provided at the top of the recovery chamber (21), and a discharge port (216) connected to the inside of the first bucket (1) is also provided at the top of the recovery chamber (21). The rice grains separated during the sieving process of the sieving roller (214) used by the negative pressure adsorption fan are transported to the first bucket (1) through the discharge port (216). The recovery chamber (21) is divided into a feeding section (211) extending horizontally and a collection section (212) extending upward at an incline. The inner wall of the collection section (212) is provided with an arc-shaped guide surface. The arc-shaped guide surface is adapted to the suction direction of the negative pressure adsorption fan. The screening roller (214) is located in the feeding section (211). A filter screen (2111) for blocking impurities in rice is provided between the feed section (211) and the collection section (212) of the recovery chamber (21). The recovery chamber (21) has two discharge ports (216), which are located on both sides of the conveying channel (11); The central area of ​​the screening roller (214) is provided with a spiral blade (2141) fixedly connected thereto, and the spiral blade (2141) is a bidirectional spiral structure; Multiple protrusions (2142) are evenly distributed on the outer circumferential surface of the screening roller (214), and the multiple protrusions (2142) extend spirally along the axis of the screening roller (214), forming a screening gap between two adjacent protrusions (2142) for rice grains to pass through.

2. The wind-suction type rice harvesting and cutting loss reduction device according to claim 1, characterized in that, The first bucket (1) has a conveying channel (11) extending along the rice harvesting direction in the center. One end of the conveying channel (11) is connected to the first bucket (1), and the other end of the conveying channel (11) leads to the subsequent processing mechanism of the harvester. A conveyor belt (111) is rotatably installed inside the conveying channel (11).

3. The wind-suction type rice harvesting and cutting loss reduction device according to claim 1, characterized in that, The recovery chamber (21) is also equipped with a rotatable feed roller (2131) located at the feed inlet (213).

4. The wind-suction type rice harvesting and cutting loss reduction device according to claim 1, characterized in that, The inlet (213) of the recycling mechanism (2) is provided with multiple feeding teeth (217) that are equidistantly distributed along its length.

5. The wind-suction type rice harvesting and cutting loss reduction device according to claim 4, characterized in that, The central area of ​​multiple feeding teeth (217) is provided with a trapezoidal guide plate (218) that is fixedly connected to the recycling mechanism (2). The guide plate is used to guide the rice gathered in the central area to both sides of the recycling mechanism (2).

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