A broad bean harvesting apparatus and method with a screening mechanism

Abstract

This invention discloses a broad bean harvesting device and method with a screening mechanism, relating to the field of broad bean planting and harvesting technology. The invention includes a material distribution mechanism that receives broad beans sorted by a three-stage screening mechanism via a hydraulic cylinder, a round handle, and a crank rod, achieving the separation of broad beans from residual impurities. Broad beans of different sizes after sorting fall into corresponding three-stage collection chambers. A hot airflow conveying mechanism generates hot airflow. The hot airflow generated by this invention can simultaneously act on the broad beans in the three-stage screening mechanism and the material distribution mechanism through the air holes of the three-stage screening screen and the material distribution chamber. On the one hand, it provides real-time hot airflow drying for the damp broad beans, effectively preventing them from clumping and moldy due to moisture. On the other hand, it utilizes the wind force of the hot airflow to quickly discharge the beans through the air outlet, achieving simultaneous drying and impurity removal.

Description

Technical Field

[0001] This invention relates to the field of broad bean planting and harvesting technology, specifically to a broad bean harvesting device and method with a screening mechanism. Background Technology

[0002] Broad beans are one of my country's important coarse grain crops. In the field harvesting stage, current technologies mostly rely on manual harvesting or general-purpose grain combine harvesters. Manual harvesting is extremely inefficient, consumes a lot of manpower and resources, and requires manual grading and weed removal afterward, making the process cumbersome. When harvesting broad beans, the general-purpose combine harvester is designed for use in open fields. If it is rainy, the broad bean seeds, straw, and shells are easily damp. Existing equipment does not have a structure for simultaneous drying and preventing mold growth. Damp broad beans are prone to clumping and mold growth during the conveying and screening process, which seriously affects the quality of the broad beans. To address the aforementioned problems, the inventors have proposed a broad bean harvesting device and method with a screening mechanism to solve these problems. Summary of the Invention

[0003] In order to solve the problem of broad beans easily clumping and becoming moldy during the screening process, which seriously affects the quality of broad beans, the purpose of this invention is to provide a broad bean harvesting device and method with a screening mechanism.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a broad bean harvesting device with a screening mechanism, including a frame, a track wheel at the bottom of the frame, and a harvesting head, a feeding mechanism, a three-stage screening mechanism, a material distribution mechanism and a three-stage collection chamber are installed on the frame in sequence. The three-stage screening mechanism is covered by a housing, and a hot air conveying mechanism is configured on the housing. The harvesting device also includes a hydraulic cylinder, a round handle, and a crank. The bottom of the feeding mechanism is fixedly connected to the harvesting head, and the top of the feeding mechanism is rotatably connected to the three-stage screening mechanism. The three-stage collection chamber is located at the bottom of the shell and is in communication with it. The feeding mechanism is used to transport the broad beans harvested by the harvesting head to the three-stage screening mechanism, which performs three-stage grading and sorting of the broad beans. The material distribution mechanism receives broad beans after they have been sorted by the three-stage screening mechanism through the linkage of hydraulic cylinder, round handle and crank rod, realizing the separation of broad beans from the remaining impurities. The broad beans of different sizes after sorting fall into the corresponding three-stage collection chambers to complete the graded collection of broad beans. The hot air conveying mechanism generates hot air to dry the broad beans in the three-stage screening mechanism and the material distribution mechanism to prevent them from becoming damp and moldy. At the same time, it blows up the shells and leaves of the broad beans and discharges them through the shells.

[0005] Preferably, a hydraulic cylinder is provided at one end of the frame, the feeding mechanism includes a shell and a conveyor belt, the output end of the hydraulic cylinder is rotatably connected to the shell, the shell is fixedly connected to the harvesting head, the conveyor belt is arranged inside the shell, a drive motor is installed on the outer wall of the shell, and the output shaft of the drive motor is connected to the rotating shaft of the conveyor belt.

[0006] Preferably, one end of the shell frame is fixedly connected to an L-shaped arc-shaped bent plate, a cam is rotatably connected to the outer wall of the L-shaped arc-shaped bent plate, the cam has a gap with the inner wall of the L-shaped arc-shaped bent plate, a ring is rotatably connected to the outer wall of the L-shaped arc-shaped bent plate, a friction wheel is rotatably connected to the outer wall of the ring, the friction wheel is located between the outer wall of the friction wheel and the bottom inner wall of the L-shaped arc-shaped bent plate, and the L-shaped arc-shaped bent plate is rotatably connected to the three-stage screening mechanism.

[0007] Preferably, the three-stage screening mechanism includes a spiral rod and a three-stage screening screen. The two three-stage screening screens are inclinedly arranged in the top tubular cavity of the shell. The shell frame rotates with the three-stage screening screen. The spiral rod is rotatably connected to the inner wall of the three-stage screening screen. A synchronous belt is driven between one end of the two spiral rods. A servo motor is connected to one end of the spiral rod.

[0008] Preferably, the three-stage screening mesh is provided with three stages of screen holes of different sizes, and the interior of the three-stage screening mesh is provided with a number of air holes that lead to the screen holes.

[0009] Preferably, the interior of the housing is rotatably connected to four partitions, two of which are fixedly connected to a heat flow cavity at their bottoms. The round handle is rotatably connected to the outer wall of the housing, one end of the crank is rotatably connected to the outer wall of the round handle, one end of the crank is slidably connected to the housing, and one end of the crank passes through the housing and is rotatably connected to the heat flow cavity. The rotating shaft of the circular handle is connected to the cam and the conveyor belt by a synchronous belt.

[0010] Preferably, a guide arc plate is fixedly connected to the outer wall of the partition, the material distribution mechanism includes a rotating support plate and an annular cavity, the inside of the housing is provided with a material distribution cavity, the rotating support plate is rotatably connected to the inner wall of the material distribution cavity, the outer wall of the annular cavity is fixedly connected to one end of the rotating support plate, the annular cavity has an inlet and an outlet with a rectangular hole, a spring is connected between the rotating support plate and the inner wall of the material distribution cavity, a semi-annular shell is rotatably connected to the inner wall of the annular cavity, a rotating shaft is connected to the semi-annular shell, a gear is fixedly connected to one end of the rotating shaft, an arc-shaped rack meshes on the outer wall of the gear, and the arc-shaped rack is fixedly connected to the inner wall of the housing.

[0011] Preferably, an inclined plate is fixedly connected to the inner wall of the material distribution chamber, and an air outlet is provided at the top of the housing, the air outlet being connected to the interior of the material distribution chamber, and the inclined plate being inclined toward the air outlet.

[0012] Preferably, the hot air delivery mechanism includes a connecting pipe, a heated pipe network, and an air inlet. Two heated pipe networks respectively penetrate into the interior of the hot air chamber and are fitted together. The connecting pipe is located between the two heated pipe networks and communicates with the interior of the material distribution chamber. A connecting cavity is provided inside the plate of the shell. The connecting pipe communicates with the three-stage screening screen through the connecting cavity. The air inlet is connected to the connecting pipe, and a fan is provided inside the air inlet.

[0013] A method for using a broad bean harvesting device with a screening mechanism includes the following steps: Step 1: Move the device to the work field and start the feeding mechanism, the three-stage screening mechanism, the hot air conveying mechanism and the material distribution mechanism respectively. Step 2: Start the device and move it at a constant speed to harvest broad beans through the harvesting head, and then smoothly convey them to the three-stage screening mechanism via the feeding mechanism. Step 3: The three-stage screening mechanism performs three-stage grading of the broad beans. At the same time, the hot air flow generated by the hot air conveying mechanism passes through the air holes of the material distribution mechanism and the three-stage screening screen to dry the moist broad beans and blow away the outer shell and leaves. Impurities are discharged through the air outlet of the shell. Step four: After grading, the broad beans fall into the distribution mechanism through the guide arc plate. The hydraulic cylinder drives the distribution mechanism to complete the separation of the broad beans from the remaining impurities. The impurities are discharged and the broad beans enter the distribution chamber. Step 5: Broad beans fall from the distribution chamber into the three-stage collection chamber to complete the graded collection.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The hot airflow generated by the hot airflow conveying mechanism of the present invention can act simultaneously on the broad beans in the three-stage screening mechanism and the material distribution mechanism through the air holes and material distribution chamber of the three-stage screening screen. On the one hand, it dries the damp broad beans in real time with hot airflow, effectively preventing the broad beans from clumping and getting moldy due to moisture. On the other hand, it uses the wind force of the hot airflow to blow up the light impurities such as shells and leaves carried in the broad beans and quickly discharge them through the air outlet, so as to achieve simultaneous drying and impurity removal.

[0015] 2. This invention features a three-stage screening screen with three different sizes of sieve holes. Combined with the feeding action of the screw rod, it can sort broad beans into three stages based on particle size. After sorting, the broad beans are guided by the distribution mechanism and fall into the corresponding three-stage collection chambers. No additional grading process is required, and the grading and collection are completed directly. This meets the specification requirements of commercial processing of broad beans, thereby improving the applicability of the screening mechanism. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the conveyor belt structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the cam structure of the present invention.

[0020] Figure 4 For the present invention Figure 3 A schematic diagram of the structure at point B.

[0021] Figure 5 This is a schematic diagram of the hydraulic cylinder and feeding mechanism of the present invention.

[0022] Figure 6 This is a schematic diagram of the three-stage screening mechanism and shell structure of the present invention.

[0023] Figure 7 This is a schematic diagram of the hot air delivery mechanism of the present invention.

[0024] Figure 8 This is a schematic diagram of the screw rod structure of the present invention.

[0025] Figure 9 For the present invention Figure 8 A schematic diagram of the structure at point A in the middle.

[0026] Figure 10 This is a schematic diagram of the internal structure of the housing of the present invention.

[0027] Figure 11 This is a schematic diagram of the internal structure of the material distribution chamber of the housing in this invention.

[0028] Figure 12 This is a schematic diagram of the shell material distribution mechanism of the present invention.

[0029] In the diagram: 1. Tracked wheel; 2. Frame; 3. Harvesting head; 4. Feeding mechanism; 41. Shell; 42. Conveyor belt; 43. Drive motor; 44. L-shaped curved plate; 45. Cam; 46. Ring body; 47. Friction wheel; 5. Three-stage screening mechanism; 51. Screw rod; 52. Three-stage screening screen; 520. Air hole; 6. Hot air conveying mechanism; 61. Connecting pipe; 62. Heated pipe network; 63. Air inlet; 7. 71. Shell; 72. Air outlet; 8. Connecting cavity; 9. Hydraulic cylinder; 10. Round handle; 11. Crank rod; 12. Three-stage collection chamber; 13. Guide arc plate; 14. Material distribution mechanism; 15. Rotating support plate; 16. Spring; 17. Annular cavity; 18. Rectangular hole; 19. Semi-annular shell; 10. Gear; 11. Arc rack; 12. Inclined plate; 13. Material distribution cavity; 14. Hot flow cavity; 15. Partition plate. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figure 1 - Figure 12 As shown, the present invention provides a broad bean harvesting device with a screening mechanism, including a frame 2, a track wheel 1 at the bottom of the frame 2, and a harvesting head 3, a feeding mechanism 4, a three-stage screening mechanism 5, a material distribution mechanism 13 and a three-stage collection chamber 11 installed sequentially on the frame 2. The outer side of the three-stage screening mechanism 5 is covered by a housing 7, and a hot air conveying mechanism 6 is arranged on the housing 7. The harvesting device also includes a hydraulic cylinder 8, a round handle 9 and a crank 10. The bottom of the feeding mechanism 4 is fixedly connected to the harvesting head 3, and the top of the feeding mechanism 4 is rotatably connected to the three-stage screening mechanism 5. The three-stage collection chamber 11 is located at the bottom of the housing 7 and is connected to it. The feeding mechanism 4 is used to transport the broad beans harvested by the harvesting head 3 to the three-stage screening mechanism 5, which performs three-stage grading and sorting of the broad beans. The material distribution mechanism 13 is linked by the hydraulic cylinder 8, the round handle 9 and the crank 10 to receive the broad beans after being sorted by the three-stage screening mechanism 5, thereby separating the broad beans from the remaining impurities. The broad beans of different sizes after sorting fall into the corresponding three-stage collection chambers 11 to complete the graded collection of the broad beans. The hot air conveying mechanism 6 generates hot air to dry the broad beans in the three-stage screening mechanism 5 and the material distribution mechanism 13 to prevent them from becoming damp and moldy. At the same time, it blows up the outer shell and leaves of the broad beans and discharges them through the shell 7.

[0032] A hydraulic cylinder 8 is provided at one end of the frame 2. The feeding mechanism 4 includes a shell 41 and a conveyor belt 42. The output end of the hydraulic cylinder 8 is rotatably connected to the shell 41. The shell 41 is fixedly connected to the harvesting head 3. The conveyor belt 42 is located inside the shell 41. A drive motor 43 is installed on the outer wall of the shell 41. The output shaft of the drive motor 43 is connected to the rotating shaft of the conveyor belt 42. The purpose of this setup is to control the output of the hydraulic cylinder 8 to drive the harvesting head 3 and the feeding mechanism 4 to rotate at one end of the three-stage screening mechanism 5, which is used to cut the bottom of the broad bean stems close to the ground. When the harvesting head 3 cuts the stems, the harvesting head 3 is the harvesting head 3 of the existing conventional model harvester. After cutting, the entire broad bean branch enters the conveyor belt 42. The output shaft of the drive motor 43 drives the conveyor belt 42 to rotate, and the broad bean branch is transported through the conveyor belt 42.

[0033] An L-shaped curved plate 44 is fixedly connected to one end of the frame 41. A cam 45 is rotatably connected to the outer wall of the L-shaped curved plate 44. A gap is left between the cam 45 and the inner wall of the L-shaped curved plate 44. A ring 46 is rotatably connected to the outer wall of the L-shaped curved plate 44. A friction wheel 47 is rotatably connected to the outer wall of the ring 46. The friction wheel 47 is located between the outer wall of the friction wheel 47 and the bottom inner wall of the L-shaped curved plate 44. The L-shaped curved plate 44 is rotatably connected to the three-stage screening mechanism 5. The purpose of this arrangement is that, during the rotation of the conveyor belt 42, the cam 45 is driven to rotate synchronously by the synchronous belt. The cam 45 drives the ring body 46 and the friction wheel 47 to rotate. The friction wheel 47 rotates and rubs against the cam 45 on the inner wall of the bottom of the L-shaped curved plate 44, thus peeling the mature broad beans. Then, under the centrifugal force of rotation, the beans are transported to the interior of the three-stage screening mechanism 5 for screening.

[0034] The three-stage screening mechanism 5 includes a screw rod 51 and a three-stage screening screen 52. The two three-stage screening screens 52 are inclinedly arranged in the top tubular cavity of the housing 7. The housing frame 41 rotates with the three-stage screening screens 52. The screw rod 51 is rotatably connected to the inner wall of the three-stage screening screen 52. A synchronous belt is connected between one end of the two screw rods 51. A servo motor is connected to one end of the screw rod 51. The purpose of this setup is that the three-stage screening screen 52 is tilted, the screw rod 51 conveys the material, and the broad beans are moved by the tilting action, allowing the three-stage screening screen 52 to screen small, medium, and large broad beans in sequence. Then, the stems and roots of the broad beans are discharged through the port of the three-stage screening screen 52. The output shaft of the servo motor drives the screw rod 51 to rotate, and the synchronous belt makes the two screw rods 51 rotate synchronously.

[0035] The three-stage screening screen 52 is provided with three stages of screen holes of different sizes. The interior of the three-stage screening screen 52 is provided with several air holes 520, which lead to the screen holes. The purpose of this setup is to use three different sizes of sieve holes for three-stage sieving of broad beans. When the three-stage sieve mesh 52 is connected to the hot air conveying mechanism 6, the hot air flows to the air holes 520, which can clear the sieve holes. At the same time, the hot air dries the material and broad beans.

[0036] The interior of the housing 7 is rotatably connected to four partitions 17, two of which are fixedly connected to a heat flow cavity 16 at their bottom. The round handle 9 is rotatably connected to the outer wall of the housing 7. One end of the crank 10 is rotatably connected to the outer wall of the round handle 9. One end of the crank 10 is slidably connected to the housing 7. One end of the crank 10 passes through the housing 7 and is rotatably connected to the heat flow cavity 16. A synchronous belt is used for transmission between the rotating shaft of the round handle 9, the cam 45, and the conveyor belt 42; The purpose of this arrangement is that, during the rotation of the cam 45, the synchronous belt drives the round handle 9 to rotate, the round handle 9 drives the crank 10 to perform circular motion, and the crank 10 reciprocates to push the hot flow cavity 16.

[0037] A guide arc plate 12 is fixedly connected to the outer wall of the partition 17. The material distribution mechanism 13 includes a rotating support plate 130 and an annular cavity 132. A material distribution cavity 15 is provided inside the housing 7. The rotating support plate 130 is rotatably connected to the inner wall of the material distribution cavity 15. The outer wall of the annular cavity 132 is fixedly connected to one end of the rotating support plate 130. The annular cavity 132 has an inlet and an outlet with a rectangular hole 133. A spring 131 is connected between the rotating support plate 130 and the inner wall of the material distribution cavity 15. A semi-annular shell 134 is rotatably connected to the inner wall of the annular cavity 132. A rotating shaft is connected to the semi-annular shell 134. A gear 135 is fixedly connected to one end of the rotating shaft. An arc-shaped rack 136 meshes on the outer wall of the gear 135. The arc-shaped rack 136 is fixedly connected to the inner wall of the housing 7. The purpose of this arrangement is that the material distribution chamber 15 is formed by the outer wall of the hot flow chamber 16 and the internal space of the shell 7. During the reciprocating movement of the hot flow chamber 16, the material distribution mechanism 13 is driven to oscillate. First, the broad bean leaves and broad beans on the material distribution mechanism 13 are oscillated, similar to the principle of sieving by a winnowing basket. During the movement of the hot flow chamber 16, the rotating support plate 130 oscillates inside the material distribution chamber 15. The spring 131 is used to reset the rotating support plate 130 and increase the oscillation amplitude. The material broad beans and leaves enter through the feed inlet of the annular cavity 132. During the oscillation, the gear 135 meshes with the arc-shaped rack 136, thereby driving the gear 135 and the rotating support plate 136 to oscillate. The shaft and semi-annular shell 134 rotate, and the semi-annular shell 134 flips the broad beans and their leaves. The airflow from the hot air conveying mechanism 6 enters through one port of the annular cavity 132. During the flipping and falling of the broad beans and their leaves, the hot airflow blows and separates the broad beans and their leaves, enhancing the separation effect. At the same time, it is conducive to drying the broad beans in the pipe space. Subsequently, under the rotation of the semi-annular shell 134, the broad beans are pushed to the outlet of the annular cavity 132 for discharge and are collected in the three-stage collection chamber 11. Since the mature broad bean leaves and their dust and impurities are relatively light, they are discharged through the rectangular hole 133 to the air outlet 71 under the action of the airflow.

[0038] An inclined plate 14 is fixedly connected to the inner wall of the material distribution chamber 15. An air outlet 71 is provided on the top of the housing 7. The air outlet 71 is connected to the interior of the material distribution chamber 15. The inclined plate 14 is inclined towards the air outlet 71. The purpose of this design is to use the inclined plate 14 to guide the mature broad bean leaves and their dust and impurities toward the air outlet 71.

[0039] The hot air conveying mechanism 6 includes a connecting pipe 61, a heated pipe network 62, and an air inlet 63. The two heated pipe networks 62 pass through the interior of the hot air chamber 16 and are fitted together. The connecting pipe 61 is between the two heated pipe networks 62 and is connected to the interior of the material distribution chamber 15. The shell 7 has a connecting cavity 72 inside its plate. The connecting pipe 61 is connected to the three-stage screening screen 52 through the connecting cavity 72. The air inlet 63 is connected to the connecting pipe 61 and has a fan inside it. The purpose of this setup is to guide external airflow to the air inlet 63 via a fan, and then distribute it through the connecting pipe 61 to the heating pipe network 62, the connecting cavity 72, the three-stage screening screen 52, and the interior of the shell 7. The heating pipe network 62 generates heat flow through electric heating. The heat flow cavity 16 is a closed cavity. The heat from the heating pipe network 62 is conducted to the heat flow cavity 16 and the material distribution cavity 15. When the broad beans fall onto the material distribution cavity 15, they undergo further drying. The mesh of the heating pipe network 62 prevents overheating during airflow and maintains a suitable working temperature for drying the broad beans.

[0040] A method for using a broad bean harvesting device with a screening mechanism includes the following steps: Step 1: Move the device to the work field and start the feeding mechanism 4, the three-stage screening mechanism 5, the hot air conveying mechanism 6 and the material distribution mechanism 13 respectively. Step 2: Start the device and move it at a constant speed to harvest broad beans through the harvesting head 3, and then smoothly convey them to the three-stage screening mechanism 5 through the feeding mechanism 4. Step 3: The three-stage screening mechanism 5 performs three-stage grading of the broad beans. At the same time, the hot air flow generated by the hot air conveying mechanism 6 passes through the air holes 520 of the material distribution mechanism 13 and the three-stage screening screen 52 to dry the moist broad beans and blow away the outer shell and leaves. Impurities are discharged through the air outlet 71 of the shell 7. Step 4: After grading, the broad beans fall into the material distribution mechanism 13 through the guide arc plate 12. The hydraulic cylinder 8 links the material distribution mechanism 13 to complete the separation of the broad beans and the remaining impurities. The impurities are discharged and the broad beans enter the material distribution chamber 15. Step 5: Broad beans fall into the three-stage collection chamber 11 through the distribution chamber 15 to complete the graded collection.

[0041] Working principle: Move the device to the broad bean field via tracked wheels 1. After connecting the power, start and debug the feeding mechanism 4, the three-stage screening mechanism 5, the hot air conveying mechanism 6, and the material distribution mechanism 13 respectively. Start the fan in the air inlet 63, the drive motor 43 of the feeding mechanism 4, and the servo motor of the three-stage screening mechanism 5. Debug the hot air temperature and air volume of the hot air conveying mechanism 6 to ensure that each component operates smoothly and that the hot air parameters meet the requirements for drying broad beans and removing impurities. Debug the hydraulic cylinder 8 to the angle that is suitable for the harvesting height of broad beans in the field.

[0042] The track wheel 1 drives the frame 2 to move at a constant speed. The harvesting head 3 completes the harvesting of broad beans in the field. The harvested broad beans, along with the shells and leaves, enter the shell frame 41 of the feeding mechanism 4. The drive motor 43 drives the conveyor belt 42 to move forward and transport the broad beans. When guided by the L-shaped curved plate 44, the cam 45 and the friction wheel 47 work together to sort the broad beans and prevent them from piling up. Finally, the broad beans are smoothly conveyed by the feeding mechanism 4 to the three-stage screening screen 52 of the three-stage screening mechanism 5.

[0043] The servo motor of the three-stage screening mechanism 5 drives the screw rod 51 to rotate, pushing the broad beans to move on the inclined three-stage screening screen 52. The broad beans pass through the three different sizes of the three-stage screening screen 52 according to their own particle size, and complete the three-stage grading. At the same time, air enters through the air inlet 63 of the hot air conveying mechanism 6 and is heated by the heating pipe network 62 to form a hot airflow. The hot airflow passes through the connecting pipe 61 and the connecting cavity 72 of the shell 7 and is blown out from the air hole 520 of the three-stage screening screen 52, directly acting on the broad beans in the screening process. On the one hand, it dries the damp broad beans in real time with hot air to prevent them from getting damp and moldy. On the other hand, it blows up the light impurities such as shells and leaves wrapped in the broad beans. The impurities are discharged from the device through the air outlet 71 of the shell 7.

[0044] Broad beans of different sizes, after being graded by the three-stage screening screen 52, are guided along the guide arc plate 12 on the partition 17 and fall into the annular cavity 132 of the material distribution mechanism 13. The hydraulic cylinder 8 operates in conjunction with the material distribution mechanism 13 via the round handle 9 and the crank 10. The round handle 9 drives the crank 10 to pull the hot flow chamber 16 to reciprocate, so that the hot airflow is evenly distributed in the material distribution chamber 15. The gear 135 rolls along the arc rack 136 and drives the semi-annular shell 134 to rotate, which performs secondary sorting on the broad beans in the annular cavity 132. The remaining light impurities are blown up by the hot airflow and guided along the inclined plate 14 to the air outlet 71 for discharge, thus completing the thorough sorting of the broad beans and the remaining impurities. The sorted pure broad beans enter the material distribution chamber 15 and then fall into the third-stage collection chamber 11 for collection.

[0045] All standard mechanical parts used in this invention can be purchased commercially, and irregularly shaped parts can be custom-made according to the description and drawings. The specific mechanical connection methods for each part can employ conventional methods such as bolts, rivets, and welding, which are already well-established in the prior art. For the motors, fans, and other mechanical parts or electronic components involving circuits involved in this invention, the relevant circuit connections adopt conventional circuit topologies and control principles in the prior art. The corresponding circuit models and operating logic are clearly understood and skillfully applied by those skilled in the art, and will not be detailed here.

[0046] The standard mechanical parts used in this invention, including but not limited to fasteners, gears, motors, and hydraulic cylinders, are all commercially available standard products known in the relevant technical field and can be directly purchased from market channels. Irregularly shaped parts can be custom-made according to the structural descriptions in this specification and accompanying drawings.

[0047] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A broad bean harvesting apparatus with a sorting mechanism, comprising a frame (2), characterized in that, The rack (2) bottom is provided with a track wheel (1), the rack (2) is sequentially provided with a harvesting head (3), a feeding mechanism (4), a three-stage screening mechanism (5), a material distributing mechanism (13) and a three-stage collecting chamber (11); The three-stage screening mechanism (5) is covered with a shell (7), and the shell (7) is provided with a hot gas flow conveying mechanism (6); the harvesting device further comprises a hydraulic cylinder (8), a round handle (9) and a curved rod (10); The bottom of the feeding mechanism (4) is fixedly connected with the harvesting head (3), and the top of the feeding mechanism (4) is rotatably connected with the three-stage screening mechanism (5); the three-stage collecting chamber (11) is arranged at the bottom of the shell (7) and is in communication. The feeding mechanism (4) is used for conveying the chickpeas harvested by the harvesting head (3) to the three-stage screening mechanism (5), and the three-stage screening mechanism (5) is used for three-stage grading and sorting of the chickpeas; The material distributing mechanism (13) is linked by the hydraulic cylinder (8), the round handle (9) and the curved rod (10), receives the chickpeas sorted by the three-stage screening mechanism (5), realizes the sorting of the chickpeas and the remaining impurities, and different sizes of the sorted chickpeas fall into corresponding three-stage collecting chambers (11) respectively, thereby completing the grading collection of the chickpeas; The hot gas flow conveying mechanism (6) generates hot gas flow, and the chickpeas in the three-stage screening mechanism (5) and the material distributing mechanism (13) are dried by the hot flow to prevent moisture and mildew, and the shells and leaves in the chickpeas are blown up and discharged through the shell (7).

2. A broad bean harvesting apparatus with a screening mechanism as claimed in claim 1, characterized in that, One end of the rack (2) is provided with a hydraulic cylinder (8), the feeding mechanism (4) comprises a shell frame (41) and a conveying belt (42), the output end of the hydraulic cylinder (8) is rotatably connected with the shell frame (41), the shell frame (41) is fixedly connected with the harvesting head (3), the conveying belt (42) is arranged in the shell frame (41), and a driving motor (43) is arranged on the outer wall of the shell frame (41).

3. A broad bean harvesting apparatus with a screening mechanism as claimed in claim 2, characterized in that, One end of the shell frame (41) is fixedly connected with an L-shaped arc-shaped bent plate (44), a cam (45) is rotatably connected to the outer wall of the L-shaped arc-shaped bent plate (44), the cam (45) has a gap with the inner wall of the L-shaped arc-shaped bent plate (44), a ring body (46) is rotatably connected to the outer wall of the L-shaped arc-shaped bent plate (44), a friction wheel (47) is rotatably connected to the outer wall of the ring body (46), the friction wheel (47) is located between the outer wall of the friction wheel (47) and the bottom inner wall of the L-shaped arc-shaped bent plate (44), and the L-shaped arc-shaped bent plate (44) is rotatably connected with the three-stage screening mechanism (5).

4. A broad bean harvesting apparatus with a screening mechanism as claimed in claim 3, characterized in that, The tertiary screening mechanism (5) includes a screw rod (51) and a tertiary screening net (52), two of which are arranged in the top tubular cavity of the shell (7), the shell frame (41) rotates with the tertiary screening net (52), the screw rod (51) is rotatably connected to the inner wall of the tertiary screening net (52), and the two ends of the screw rod (51) are drivingly connected by a synchronous belt, and one end of the screw rod (51) is connected with a servo motor.

5. A broad bean harvesting apparatus with a screening mechanism as claimed in claim 4, characterized in that, The tertiary screening net (52) is provided with three different sizes of screen holes, and the inside of the tertiary screening net (52) is provided with a plurality of air holes (520) leading to the screen holes.

6. A broad bean harvesting apparatus with a screening mechanism as claimed in claim 5, characterized in that, The inside of the shell (7) is rotatably connected with four partitions (17), two of which are fixedly connected with a heat flow cavity (16) at the bottom, the round handle (9) is rotatably connected to the outer wall of the shell (7), one end of the curved rod (10) is rotatably connected to the outer wall of the round handle (9), one end of the curved rod (10) is slidingly connected with the shell (7), and one end of the curved rod (10) penetrates the shell (7) and is rotatably connected with the heat flow cavity (16). The round handle (9) is drivingly connected with the cam (45) and the conveying belt (42) by a synchronous belt.

7. A broad bean harvesting apparatus with a sorting mechanism as claimed in claim 6, characterized in that, The outer wall of the partition (17) is fixedly connected with a material guiding arc plate (12), the material distributing mechanism (13) includes a rotating support plate (130) and an annular cavity (132), the inside of the shell (7) is provided with a material distributing cavity (15), the rotating support plate (130) is rotatably connected to the inner wall of the material distributing cavity (15), the outer wall of the annular cavity (132) is fixedly connected with one end of the rotating support plate (130), the annular cavity (132) is provided with an inlet and an outlet in the form of a rectangular hole (133) on the upper wall, the rotating support plate (130) and the inner wall of the material distributing cavity (15) are connected by a spring (131), the inner wall of the annular cavity (132) is rotatably connected with a semi-annular shell (134), the semi-annular shell (134) is connected with a rotating shaft, one end of the rotating shaft is fixedly connected with a gear (135), the outer wall of the gear (135) is engaged with an arc gear rack (136), and the arc gear rack (136) is fixedly connected to the inner wall of the shell (7).

8. A broad bean harvesting apparatus with a sorting mechanism as claimed in claim 7, characterized in that, The inner wall of the material distributing cavity (15) is fixedly connected with an inclined plate (14), the top of the shell (7) is provided with an air outlet (71) which communicates with the inside of the material distributing cavity (15), and the inclined plate (14) is inclined towards the air outlet (71).

9. A broad bean harvesting apparatus with a sorting mechanism as claimed in claim 8, characterized in that, The hot air delivery mechanism (6) includes a connecting pipe (61), a heating pipe network (62), and an air inlet (63). The two heating pipe networks (62) pass through the interior of the hot air chamber (16) and are fitted together. The connecting pipe (61) is between the two heating pipe networks (62). The connecting pipe (61) is connected to the interior of the material distribution chamber (15). The plate of the shell (7) is provided with a connecting cavity (72). The connecting pipe (61) is connected to the three-stage screening screen (52) through the connecting cavity (72). The air inlet (63) is connected to the connecting pipe (61). A fan is provided inside the air inlet (63).

10. A method of using a broad bean harvesting apparatus with a screening mechanism as claimed in claim 9, characterised in that, The following steps are required: Step 1: Move the device to the work field and start the feeding mechanism (4), the three-stage screening mechanism (5), the hot air conveying mechanism (6) and the material distribution mechanism (13) respectively. Step 2: Start the device and move at a constant speed to harvest broad beans through the harvesting head (3), and then smoothly transport them to the three-stage screening mechanism (5) through the feeding mechanism (4). Step 3: The three-stage screening mechanism (5) performs three-stage grading of broad beans. At the same time, the hot air flow generated by the hot air conveying mechanism (6) passes through the air holes (520) of the material distribution mechanism (13) and the three-stage screening screen (52) to dry the moist broad beans and blow off the shells and leaves. Impurities are discharged through the air outlet (71) of the shell (7). Step 4: After grading, the broad beans fall into the material distribution mechanism (13) through the guide arc plate (12). The hydraulic cylinder (8) links the material distribution mechanism (13) to complete the separation of broad beans and remaining impurities. The impurities are discharged and the broad beans enter the material distribution chamber (15). Step 5: Broad beans fall into the three-stage collection chamber (11) through the distribution chamber (15) to complete the graded collection.

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