Harvesting and cutting loss reducing device of wind suction type rice machine

Abstract

The invention relates to the technical field of rice harvesting, in particular to an air suction type rice harvesting machine cutting loss reducing device which comprises a first bucket and a recycling mechanism, the recycling mechanism comprises a recycling cavity, and a discharging opening and a feeding opening are formed in the top and the bottom of the recycling cavity respectively; discharge holes are formed in the two ends of the recovery cavity; a screening roller and a negative pressure adsorption wind mechanism are arranged on the recovery cavity, the recovery mechanism is arranged at the rear end of the first bucket, rice left on the ground after harvesting can be recovered in a targeted mode, and rice loss in the harvesting process is effectively reduced; the screening roller rotates to push impurities to the two ends of the recovery cavity to be discharged, rice grains and the impurities can be separated in the recovery process, the influence of the impurities on follow-up treatment is reduced, and the purity of recovered rice is guaranteed; and the negative pressure adsorption fan is matched with the discharging opening, separated rice grains can be efficiently conveyed to the first bucket, and centralized treatment of rice recycling and main harvesting is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rice harvesting, in particular to a wind suction type rice machine harvesting and reducing loss device. BACKGROUND

[0002] With the rapid development of social economy and the continuous improvement of the demand for agricultural scale production, the importance of agricultural mechanization level is increasingly prominent, especially in the field of rice planting. The traditional manual harvesting method of rice is inefficient and labor-intensive, and it is difficult to meet the requirements of modern agricultural production for efficiency and yield. Therefore, mechanized rice harvesters have emerged as the times require. Although the rice harvesters on the market have realized the mechanization of the harvesting process, some traditional models still have obvious shortcomings, such as low harvesting efficiency, high grain loss rate during rice harvesting, and poor operation convenience, which cannot fully adapt to the complex working environment of rice fields and the production needs of large-scale planting. For example, a kind of automatic rice harvester disclosed in Chinese patent No. CN109089525B sets up a bunching device, a harvesting device, a threshing device, a separating device and other components to realize the automation of the rice harvesting process, which has made certain progress in improving production efficiency, reducing post-threshing loss rate and simplifying operation. However, in actual application, there is still room for optimization for the recovery and processing of residual rice on the ground during the rice harvesting process. The existing equipment is not sufficient for the recovery of scattered and prostrate residual rice after harvesting, which easily causes grain loss and is difficult to further improve the overall recovery rate of rice harvesting, and cannot fully meet the high standard requirements of agricultural production for rice machine harvesting and loss reduction. SUMMARY

[0003] In view of the above problems, a wind suction type rice machine harvesting and reducing loss device is provided, which sets a recovery mechanism at the rear end of the first bucket to recover the residual rice on the ground after harvesting, effectively reducing the loss of rice during harvesting. The screening roller pushes impurities to the two ends of the recovery cavity by rotating, which can separate rice grains from impurities during recovery, reduce the impact of impurities on subsequent processing, and ensure the purity of recovered rice. The negative pressure suction fan cooperates with the discharge port to efficiently transport the separated rice grains to the first bucket, realizing the centralized processing of recovered rice and main harvested rice.

[0004] In order to solve the prior art problems, the present application provides a wind suction type rice machine harvesting and cutting damage reducing device, which comprises a first shovel for harvesting rice plants, a recovery mechanism arranged at the rear end of the first shovel, the recovery mechanism comprising a recovery cavity, the bottom of the recovery cavity being provided with an inlet extending in the horizontal direction; a rotatable screening roller is arranged inside the recovery cavity, the screening roller screening the rice entering the recovery cavity through rotation, both ends of the recovery cavity being provided with discharge outlets; a negative pressure suction fan is arranged at the top of the recovery cavity, and the top of the recovery cavity is further provided with a discharge port in communication with the inside of the first shovel, the rice grains separated in the screening process of the screening roller for suction are conveyed into the first shovel through the discharge port.

[0005] Preferably, the recovery cavity is divided into an inlet part extending in the horizontal direction and a flow collecting part extending upwardly and obliquely, the inner wall of the flow collecting part is provided with an arc-shaped flow guide surface, the arc-shaped flow guide surface is matched with the air suction direction of the negative pressure suction fan, and the screening roller is arranged in the inlet part.

[0006] Preferably, a filter screen for blocking impurities in the rice is arranged between the inlet part and the flow collecting part of the recovery cavity.

[0007] Preferably, a conveying channel extending in the rice harvesting direction is arranged in the center of the first shovel, one end of the conveying channel is in communication with the first shovel, the other end of the conveying channel leads to a subsequent processing mechanism of the harvester, and a conveying belt is rotatably arranged in the conveying channel.

[0008] Preferably, the discharge port on the recovery cavity has two, and the two discharge ports are respectively located on both sides of the conveying channel.

[0009] Preferably, a helical blade fixedly connected with the screening roller is arranged in the central region of the screening roller, and the helical blade has a bidirectional helical structure.

[0010] Preferably, a plurality of protruding parts are uniformly distributed on the outer circumferential surface of the screening roller, the plurality of protruding parts extend in a helical shape along the axis of the screening roller, and a screening gap for the rice grains to pass through is formed between adjacent two protruding parts.

[0011] Preferably, a rotatable feeding roller is further arranged at the inlet of the recovery cavity.

[0012] Preferably, a plurality of spacing distributing stirring teeth are arranged at the inlet of the recovery mechanism along the length direction.

[0013] Preferably, a trapezoidal guide plate fixedly connected with the recovery mechanism is arranged in the central region of the plurality of stirring teeth, and the guide plate is used for guiding the rice gathered in the central region to both sides of the recovery mechanism.

[0014] The present application has the following beneficial effects compared with the prior art:

[0015] 1. The present application can effectively reduce the loss of rice during harvesting by setting a recovery mechanism at the rear end of the first bucket to target the recovery of rice remaining on the ground after harvesting; the impurity is pushed to the two ends of the recovery cavity by the rotating screening roller and discharged, which can separate the rice grains from the impurities during the recovery process, reduce the impact of impurities on subsequent processing, and ensure the purity of the recovered rice; the negative pressure adsorption fan cooperates with the discharge port to efficiently transport the separated rice grains to the first bucket, realize the centralized processing of the recovered rice and the main harvested rice, and the overall structure cooperates with the first bucket to work without interfering with the main harvesting operation, thereby significantly improving the overall recovery rate of rice harvesting.

[0016] 2. The present application further improves the purity of the recovered material by setting a filter screen between the feed part and the flow collecting part, reduces the interference of impurities entering the flow collecting part on the negative pressure adsorption fan, reduces the risk of wear or blockage of the fan due to the rolling of impurities, and avoids the accumulation of impurities at the discharge port, making the transportation process of rice grains from the flow collecting part to the first bucket more smooth. The secondary filtration setting cooperates with the preliminary separation of the screening roller to make the impurity separation effect of the entire recovery mechanism more complete, ensuring the quality of the recovered rice, prolonging the service life of the device components, and enhancing the stability and practicality of the loss reduction device in continuous operation.

[0017] 3. The present application changes the passive waiting of the feeding process of the recovery cavity to active grabbing through the setting of the feeding roller, which can more effectively collect the rice remaining on the ground, especially for the rice that is lying down and scattered, avoiding the problem of insufficient feeding caused by simply relying on negative pressure adsorption, and improving the collection efficiency of the rice remaining on the ground; at the same time, the rotation of the feeding roller can control the speed and rhythm of the material entering the recovery cavity, avoid the blockage of the recovery cavity caused by a large amount of material rushing in at the same time, and ensure that the material entering can be more coordinated with the screening action of the screening roller, ensuring the stable screening process, and further improving the working efficiency and loss reduction effect of the entire recovery mechanism, so that more residual rice can be effectively recovered. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a three-dimensional structure diagram of a wind suction type rice harvester loss reduction device Figure One .

[0019] Figure 2 It is a three-dimensional structure diagram of a wind suction type rice harvester loss reduction device Figure Two .

[0020] Figure 3 It is a sectional structure diagram of a wind suction type rice harvester loss reduction device Figure One .

[0021] Figure 4It is a cross-sectional structure diagram of a wind suction type rice machine harvesting and cutting loss reduction device Figure Two .

[0022] Figure 5 It is a cross-sectional structure diagram of a recovery mechanism in a wind suction type rice machine harvesting and cutting loss reduction device

[0023] Figure 6 It is a cross-sectional structure diagram of a recovery mechanism in a wind suction type rice machine harvesting and cutting loss reduction device

[0024] Figure 7 It is Figure 6 an enlarged view of A in

[0025] Figure 8 It is a three-dimensional structure diagram of a recovery mechanism in a wind suction type rice machine harvesting and cutting loss reduction device Figure One .

[0026] Figure 9 It is a three-dimensional structure diagram of a recovery mechanism in a wind suction type rice machine harvesting and cutting loss reduction device Figure Two .

[0027] Figure 10 It is a three-dimensional structure diagram of a recovery mechanism in a wind suction type rice machine harvesting and cutting loss reduction device Figure Three .

[0028] In the figure, the labels are: 1, first shovel; 11, conveying channel; 111, conveying belt; 2, recovery mechanism; 21, recovery cavity; 211, feeding part; 2111, filter screen; 212, flow collecting part; 213, feeding port; 2131, feeding roller; 214, screening roller; 2141, spiral blade; 2142, protruding part; 215, discharging port; 216, discharging port; 217, stirring tooth; 218, guide plate; 22, negative pressure suction mechanism. DETAILED DESCRIPTION

[0029] In order to further understand the features, technical means and specific purposes and functions achieved by the present application, the present application will be described in further detail below in conjunction with the drawings and specific embodiments.

[0030] As Figures 1 to 4 , Figures 8 to 10As shown: a suction type rice machine harvesting machine cutting loss device, including a first bucket 1 for harvesting rice plants, the rear end of the first bucket 1 is provided with a recycling mechanism 2, the recycling mechanism 2 includes a recycling cavity 21, the bottom of the recycling cavity 21 is provided with a feed port 213 extending in the horizontal direction; the inside of the recycling cavity 21 is provided with a rotatable screening roller 214, the screening roller 214 screens the rice entering the recycling cavity 21 by rotating, both ends of the recycling cavity 21 are provided with a discharge port 215; the top of the recycling cavity 21 is provided with a negative pressure suction fan, the top of the recycling cavity 21 is also provided with a discharge port 216 communicating with the inside of the first bucket 1, the rice grains separated in the screening process of the screening roller 214 for suction are conveyed into the first bucket 1 through the discharge port 216.

[0031] When the device works, the first bucket 1 first harvests the rice plants in the field, when the first bucket 1 completes the harvesting and moves forward, the residual rice on the ground will enter the inside of the recycling cavity 21 through the feed port 213 extending in the horizontal direction at the bottom of the recycling cavity 21; At this time, the screening roller 214 in the recycling cavity 21 will start to rotate, and in the rotating process, the rice entering the recycling cavity 21 is screened and treated, and the straw, soil and other impurities in the rice are separated out, the separated impurities are guided to the discharge port 215 at both ends of the recycling cavity 21 with the rotation of the screening roller 214, and finally discharged from the discharge port 215 of the recycling cavity 21; At the same time, the negative pressure suction fan at the top of the recycling cavity 21 starts to generate negative pressure, and the rice grains separated after screening by the screening roller 214 are adsorbed, and the adsorbed rice grains are then conveyed into the first bucket 1 through the discharge port 216 at the top of the recycling cavity 21 communicating with the inside of the first bucket 1, combined with the rice harvested by the first bucket 1, and jointly enter the subsequent processing link.

[0032] The device can recycle the residual rice on the ground after harvesting by setting the recycling mechanism 2 at the rear end of the first bucket 1, effectively reducing the loss of rice during harvesting; the screening roller 214 pushes the impurities to the both ends of the recycling cavity 21 by rotating, which can separate the rice grains from the impurities during recycling, reduce the influence of impurities on subsequent processing, and ensure the purity of the recycled rice; the negative pressure suction fan cooperates with the discharge port 216 to efficiently convey the separated rice grains to the first bucket 1, realize the centralized processing of the recycled rice and the main harvested rice, and the overall structure cooperates with the first bucket 1 to work without interfering with the main harvesting operation, which significantly improves the overall recovery rate of rice harvesting.

[0033] As shown in Figures 1 to 8 The recycling cavity 21 is divided into a feed part 211 extending in the horizontal direction and a flow collecting part 212 extending upwardly, the inner wall of the flow collecting part 212 is provided with an arc-shaped flow guide surface, the arc-shaped flow guide surface is matched with the air suction direction of the negative pressure suction fan, and the screening roller 214 is arranged in the feed part 211.

[0034] The feeding part 211 of the recovery cavity 21 extends in the horizontal direction, providing a stable installation space and working environment for the screening roller 214. When the feeding roller 2131 drives the ground residual rice into the recovery cavity 21, the rice first enters the horizontally arranged feeding part 211, and the screening roller 214 rotates in the feeding part 211, which can more stably screen the rice and reduce the problem of rice accumulation or uneven screening caused by the inclination of the cavity, making impurities more smoothly discharged to both ends of the recovery cavity 21, and the rice grains remaining in the feeding part 211. The flow collecting part 212 extends upwardly and obliquely, forming a continuous rice conveying path with the horizontal feeding part 211. When the negative pressure suction fan is working, the arc-shaped flow guide surface of the inner wall of the flow collecting part 212 is adapted to the suction direction of the fan, which can guide the airflow to form a more stable flow path along the arc-shaped surface, reduce the turbulence of the airflow in the flow collecting part 212, and make the rice grains in the feeding part 211 more smoothly enter the flow collecting part 212 under the action of negative pressure, and be guided to the discharge port 216 along the arc-shaped flow guide surface, reducing the residue of the grains on the inner wall of the flow collecting part 212. This structure sets the feeding, screening and flow collecting functions of the recovery cavity 21 to form an organic cooperation through the optimization of space layout, which not only ensures the efficient screening of the screening roller 214, but also improves the conveying efficiency of the negative pressure suction fan for rice grains through the cooperation of the arc-shaped flow guide surface and the inclined flow collecting part 212, reduces the loss of rice grains during the recovery process, and further enhances the practicality and reliability of the whole loss reduction device.

[0035] As shown in Figures 2 to 7 The filter screen 2111 is arranged between the feeding part 211 and the flow collecting part 212 of the recovery cavity 21 to block impurities in the rice.

[0036] The filter screen 2111 arranged between the feeding part 211 and the flow collecting part 212 forms an impurity interception barrier during the recovery of the rice. After the screening roller 214 screens the material in the feeding part 211, part of the small impurities that are not completely separated may move to the flow collecting part 212 together 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 into the flow collecting part 212, thereby realizing secondary filtration based on the preliminary separation of the screening roller 214 and ensuring that the material entering the flow collecting part 212 is mainly rice grains.

[0037] The setting of the filter screen 2111 further improves the purity of the recovered material, reduces the interference of impurities into the collecting part 212 on the negative pressure suction fan, reduces the risk of wear or blockage of the fan due to the entrapment of impurities, and avoids the accumulation of impurities at the discharge port 216, which causes poor conveying, making the conveying process of rice grains from the collecting part 212 to the first bucket 1 more smooth. The secondary filtering setting cooperates with the preliminary separation of the screening roller 214 to make the impurity separation effect of the entire recovery mechanism 2 more complete, ensuring the quality of the recovered rice and prolonging the service life of each part of the device, enhancing the stability and practicality of the damage reduction device in continuous operation.

[0038] As shown in Figures 1 to 6 : The first bucket 1 is centrally provided with a conveying channel 11 extending in the direction of rice harvesting, one end of the conveying channel 11 is in communication with the first bucket 1, and the other end of the conveying channel 11 leads to the subsequent processing mechanism of the harvester. The conveying channel 11 is rotatably mounted with a conveyor belt 111.

[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 in communication with the conveying channel 11. At this time, the conveyor belt 111 in the conveying channel 11 will rotate, and the rice entering the conveying channel 11 will be moved along the extension direction of the conveying channel 11 by the rotating conveyor belt 111, and 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 be orderly entered into the subsequent processing link.

[0040] The setting of the conveying channel 11 provides a special conveying path for the rice collected in the first bucket 1, avoiding the poor conveying caused by the random accumulation of rice in the first bucket 1, and the rotation of the conveyor belt 111 can actively drive the rice to move, ensuring the continuity and stability of the conveying process, reducing the residence and loss of rice during the conveying process. At the same time, the conveying channel 11 directly connects the first bucket 1 with the subsequent processing mechanism of the harvester, so that the harvested rice can quickly enter the next step of processing.

[0041] As shown in Figures 2 to 9 : The discharge port 216 on the recovery cavity 21 has two, and the two discharge ports 216 are respectively located on both sides of the conveying channel 11.

[0042] The rice grains in the recovery mechanism 2 that are adsorbed by the negative pressure suction fan will pass through the two discharge ports 216 into the first bucket 1. Since the two discharge ports 216 are respectively located on both sides of the conveying channel 11, the rice grains entering the first bucket 1 will converge with the rice in the first bucket 1, and then will be moved together to the subsequent processing mechanism of the harvester under the driving of the rotation of the conveyor belt 111 in the conveying channel 11.

[0043] By setting two discharge ports 216 on both sides of the conveying channel 11, the recovered rice grains can enter from both sides of the conveying channel 11, avoiding the uneven loading of rice in the channel caused by single-sided feeding, ensuring more uniform distribution of rice in the conveying channel 11, reducing the blockage or damage of the grains caused by local accumulation; at the same time, the two-sided feeding mode cooperates with the conveying direction of the conveying belt 111 in the conveying channel 11, making the confluence of recovered rice and harvested rice more smooth, without the need for additional flow guide structure to achieve efficient mixing of the two, further improving the overall conveying efficiency of the conveying channel 11, and making the cooperation between the recovery mechanism 2 and the first shovel 1 more closely, ensuring that the entire damage reduction device can continuously and stably collect and transport rice during harvesting, reducing grain loss in the harvesting link.

[0044] As shown in Figures 3 to 7 : The central region 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.

[0045] When the screening roller 214 rotates, the bidirectional spiral blade 2141 fixedly connected in the central region rotates synchronously with the screening roller 214. Since the first shovel 1 is centrally provided with a conveying channel 11, rice entering from the middle of the recovery cavity 21 cannot easily enter the first shovel 1 from the center. By providing the spiral blade 2141 with a bidirectional spiral structure, the spiral blade 2141 can generate a pushing force on the rice entering the recovery cavity 21 from the center of the feeding port 213 towards both ends of the screening roller 214, evenly distributing the rice originally gathered in the central region of the screening roller 214 to both sides of the screening roller 214, so that the rice can cover the entire length direction of the screening roller 214; then, the rice pushed to both sides continues to be screened under the action of the rotation of the screening roller 214, and the separated impurities are removed from the discharge ports 215 at both ends of the recovery cavity 21, while the separated rice grains remain in the recovery cavity 21, waiting to be adsorbed and conveyed by the negative pressure adsorption fan.

[0046] The spiral blade 2141 of the bidirectional spiral structure solves the problem of rice accumulation in the center of the screening roller 214 when the rice enters the middle of the recovery cavity 21, avoids incomplete screening or reduced screening efficiency caused by excessive local rice, makes the rice more evenly distributed on the screening roller 214, ensures that each section of the screening roller 214 can fully play a screening role, and improves 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, without the need for additional power drive, which simplifies the structure while ensuring the continuity of material conveying and screening; evenly distributed rice can also reduce the impurities entrained due to local accumulation, further improve the purity of the separated rice grains, and cooperate with the adsorption function of the negative pressure adsorption fan to make the subsequent conveying of the rice grains more smooth, reduce the risk of blockage of the discharge port 216 caused by uneven distribution of the grains, and ultimately enhance the loss reduction effect and working stability of the entire recovery mechanism 2.

[0047] As shown in Figures 3 to 7 The outer periphery of the screening roller 214 is evenly distributed with a plurality of protruding portions 2142, and the plurality of protruding portions 2142 extend in a spiral shape along the axis of the screening roller 214, and the screening gap for the rice grains to pass through is formed between adjacent two protruding portions 2142.

[0048] After the rice enters the recovery cavity 21, the screening roller 214 will rotate, at this time the plurality of protruding portions 2142 evenly distributed on the outer periphery of the screening roller 214 will rotate synchronously with the screening roller 214, and since the protruding portions 2142 extend in a spiral shape along the axis of the screening roller 214, an axial pushing force will be generated on the material entering the feeding portion 211 during rotation, which moves the material along the length direction of the screening roller 214 to the end of the recovery cavity 21; at the same time, the screening gap formed between adjacent protruding portions 2142 can screen the recovered rice, so that the rice grains of appropriate size fall from the gap and remain in the recovery cavity 21, while the larger impurities such as straw and soil are blocked by the protruding portions 2142 and continuously move to the end of the recovery cavity 21 along the pushing direction of the spiral, and finally are discharged from the discharge port 215 at the end of the recovery cavity 21.

[0049] The protruding portions 2142 extending in a spiral shape not only realize the axial conveying of the material, but also complete the separation of the rice grains and impurities through the screening gap formed between adjacent protruding portions 2142, so that the screening and conveying processes are synchronized, improving the working efficiency of the recovery mechanism 2; the evenly distributed protruding portions 2142 make the material more balanced in the screening process, avoiding uneven screening caused by local accumulation, ensuring that more rice grains can pass through the gap and remain, and reducing the loss of grains caused by incomplete screening; at the same time, the existence of the screening gap makes the separation of impurities and grains more complete, reduces the interference caused by impurities in the subsequent negative pressure adsorption and conveying process, further ensures the purity of the recovered rice, and enhances the practical effect of the entire loss reduction device.

[0050] AsFigures 1 to 4 、 Figure 8 and Figure 9 As shown in FIG. 13, the recycling cavity 21 is also provided with a rotatable feeding roller 2131 at the feeding port 213.

[0051] When the feeding roller 2131 rotates, it will actively contact the rice left on the ground, and through the rotating action, it will push and send these rice into the feeding port 213 at the bottom of the recycling cavity 21, so that the rice left on the ground can more smoothly enter the recycling cavity 21, providing a stable material source for the subsequent screening of the screening roller 214.

[0052] The setting of the feeding roller 2131 changes the feeding process of the recycling cavity 21 from passive waiting to active grabbing, which can more effectively collect the rice left on the ground, especially for the rice that is flat and scattered, avoiding the problem of insufficient feeding caused by simply relying on negative pressure adsorption, and improving the collection efficiency of the rice left on the ground. At the same time, the rotation of the feeding roller 2131 can control the speed and rhythm of the material entering the recycling cavity 21, avoiding the blockage of the recycling cavity 21 caused by the sudden influx of materials, so that the materials can be more coordinated with the screening action of the screening roller 214 after entering, ensuring the stable screening process, and further improving the working efficiency and damage reduction effect of the whole recycling mechanism 2, so that more rice left on the ground can be effectively recycled.

[0053] The power of the feeding roller 2131 can be provided with an independent driving device or transmission connection with the harvesting mechanism in the first bucket 1.

[0054] As shown in FIG. 14, FIG. 15 and FIG. 16, the recycling mechanism 2 is provided with a plurality of material pushing teeth 217 equidistantly distributed along the length direction of the feeding port 213. Figure 1 、 Figure 2 、 Figures 8 to 10 As shown in FIG. 14, FIG. 15 and FIG. 16, the recycling mechanism 2 is provided with a plurality of material pushing teeth 217 equidistantly distributed along the length direction of the feeding port 213.

[0055] When the recycling mechanism 2 moves forward with the harvester, the plurality of material pushing teeth 217 equidistantly distributed along the length direction of the feeding port 213 will move synchronously, so that the rice left on the ground is picked up through the structure of the material pushing teeth 217. At the same time, due to the equidistant distribution of the material pushing teeth 217 and the arrangement along the length direction of the feeding port 213, the rice left on the ground at different positions can be uniformly contacted, the originally dispersed rice can be combed and gathered, and the rice can be directed to the feeding port 213, so that the rice can more smoothly enter the recycling cavity 21.

[0056] Through the arrangement of the plurality of poking teeth 217, it is ensured that the residual rice in each area of the length direction of the feeding port 213 can be effectively contacted and treated, the missing of the residual rice caused by the local lack of the poking teeth 217 is avoided, and meanwhile, the distribution along the length direction covers the entire width of the feeding port 213, so that the residual rice in different positions can be guided to the recycling cavity 21, and the loss of the residual rice on the ground is reduced; the effect of combing and gathering avoids the entanglement of the rice into a group, so that the distribution of the rice entering the recycling cavity 21 is more uniform, the subsequent screening roller 214 can be efficiently screened, the screening and adsorption links of the recycling mechanism 2 are better matched, and the recycling efficiency and effect of the recycling mechanism 2 on the residual rice are further improved.

[0057] As shown in Figure 1 , Figure 2 , Figures 8 to 10 : the central region of the plurality of poking teeth 217 is provided with a trapezoidal guide plate 218 fixedly connected with the recycling mechanism 2, and the guide plate is used for guiding the rice gathered in the central region to the two sides of the recycling mechanism 2.

[0058] When the recycling mechanism 2 works, the poking teeth 217 pick up the residual rice on the ground and deliver it to the recycling cavity 21, and in the process, the rice is easy to gather in the central region of the poking teeth 217; at this time, the trapezoidal guide plate 218 in the central region of the poking teeth 217 guides the rice gathered in the center to the two sides of the recycling mechanism 2 through the two inclined slopes, so that the rice is uniformly distributed along the width direction of the recycling mechanism 2. The problem that the rice is not fully treated on the two sides due to the accumulation of the rice in the central region of the recycling mechanism 2 is avoided, the subsequent links such as screening and adsorption of the recycling mechanism 2 can more uniformly treat the material, and the recycling efficiency of each region is improved; meanwhile, the uniformly distributed rice reduces the local load difference, so that the recycling mechanism 2 runs more stably, further enhances the recycling effect of the residual rice on the ground, and reduces the loss of grains in the harvesting process.

[0059] The above embodiments only express one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the protection scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A wind-suction type rice harvester with reduced damage 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 recycling mechanism (2), which includes a recycling chamber (21) and a feed inlet (213) extending in the horizontal direction is provided at the bottom of the recycling chamber (21). The recycling chamber (21) is equipped with a rotatable 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) 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 screen roller (214) used by the negative pressure adsorption fan are transported to the first bucket (1) through the discharge port (216).

2. The wind-suction type rice harvesting and cutting loss reduction device according to claim 1, characterized in that, 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, which is adapted to the suction direction of the negative pressure adsorption fan. The screening roller (214) is located in the feeding section (211).

3. The wind-suction type rice harvesting and cutting loss reduction device according to claim 2, characterized in that, 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).

4. 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).

5. The wind-suction type rice harvesting and cutting loss reduction device according to claim 4, characterized in that, The recovery chamber (21) has two discharge ports (216), which are located on both sides of the conveying channel (11).

6. The wind-suction type rice harvesting and cutting loss reduction device according to claim 5, characterized in that, The central area of ​​the screening roller (214) is provided with a spiral blade (2141) fixedly connected to it, and the spiral blade (2141) has a bidirectional spiral structure.

7. A wind-suction type rice harvesting and cutting loss reduction device according to claim 6, characterized in that, 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.

8. 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).

9. A wind-suction type rice harvesting and cutting loss reduction device according to claim 4, 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.

10. A wind-suction type rice harvesting and cutting loss reduction device according to claim 9, 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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