An alfalfa seed harvester and method of harvesting
By introducing a cleaning and screening mechanism into the alfalfa seed harvester, using cylinder-driven moving bars and soft brushes to clean the filter plates, combined with gear linkage, the problems of filter clogging and impurity contamination are solved, achieving efficient, clean, and low-cost separation of seeds during harvesting.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- INSTITUTE OF GRASSLAND RESEARCH OF CAAS
- Filing Date
- 2023-04-20
- Publication Date
- 2026-06-19
AI Technical Summary
The filters of existing alfalfa seed harvesters are prone to clogging, causing the machines to malfunction. Furthermore, the broken seeds are often mixed with broken leaves and impurities, requiring additional screening, which reduces harvesting efficiency and increases costs.
An alfalfa seed harvester was designed, comprising a cleaning mechanism, a threshing mechanism, and a screening mechanism. The filter plate is cleaned by a cylinder-driven moving bar and a soft brush, combined with gears and racks to prevent clogging, and the reciprocating motion of the screen separates the seeds from the impurities.
It effectively prevents filter plate clogging, improves machine operating efficiency, achieves simultaneous separation of seeds and impurities, reduces additional screening steps and power consumption, improves harvesting efficiency and reduces costs.
Smart Images
Figure CN116391508B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of seed harvesting technology, and in particular to an alfalfa seed harvester and its harvesting method. Background Technology
[0002] Alfalfa is a plant, belonging to the annual or perennial herbaceous plants, with trifoliate compound leaves, small flowers arranged in axillary short racemes or capitula, and a saucer-shaped corolla that is yellow or purple. It has 10 stamens, which are diadelphous, and a spiral or sickle-shaped pod that does not dehisce, containing one to several seeds. It is commonly used as livestock feed. Since the planting and dispersal of alfalfa require the use of seeds for cultivation, when the mother plant matures, the seeds it contains need to be removed so that it can be replanted the following year.
[0003] Traditional alfalfa seed harvesting methods typically involve cutting mature mother plants, sun-drying them, and then manually placing the dried plants into a seed harvester. The threshing unit then beats the seeds off the mother plants. However, in this type of seed harvester, the filter screen used to sieve the seeds is prone to clogging, affecting the machine's operation. Furthermore, the broken seeds often contain broken leaves and other impurities, requiring subsequent sieving, which reduces harvesting efficiency and increases operating costs. Therefore, we propose an alfalfa seed harvester and its harvesting method. Summary of the Invention
[0004] The purpose of this invention is to solve the problems in the prior art where the filter screen for screening seeds from the mother plant is prone to clogging, which affects the operation of the machine. Moreover, the seeds after being broken up are often mixed with broken leaves and other impurities, which requires re-screening with a sieve machine later, which not only reduces harvesting efficiency but also increases operating costs. Therefore, this invention proposes an alfalfa seed harvester and harvesting method.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] An alfalfa seed harvester includes a vehicle body, a threshing box fixedly connected to the top of the vehicle body, a filter plate fixedly connected inside the threshing box, a cleaning mechanism for preventing the filter plate from clogging inside the threshing box, a threshing mechanism for detaching seeds from the mother plant linked to the cleaning mechanism via a connecting component, a screening mechanism for secondary screening of the seeds linked to the connecting component, a feeding mechanism for allowing the mother plant to enter the threshing box on the top of the vehicle body, a feed inlet on one side wall of the threshing box near the feeding mechanism, and a shovel fixedly connected to one side of the vehicle body.
[0007] Preferably, the cleaning mechanism includes a cylinder fixedly connected to one side of the threshing box, a movable bar fixedly connected to one end of the cylinder extension rod, a soft brush fixedly connected to the top of the movable bar, and a rack fixedly connected to one side of the movable bar, the rack slidingly penetrating the adjacent side wall of the threshing box.
[0008] Preferably, the connecting assembly includes a connecting gear meshing with the outer surface of the rack, a first rotating rod fixedly connected to the shaft of the connecting gear, two support blocks fixedly connected to one side of the threshing box, the first rotating rod being rotatably connected to the two support blocks via bearings, a driving belt gear fixedly connected to the top of the first rotating rod, a driven belt gear being provided on the top of the threshing box, and the driving belt gear and the driven belt gear being connected by a connecting belt drive.
[0009] Preferably, the threshing mechanism includes a stirring rod fixedly connected to the shaft of the driven belt gear. The stirring rod is rotatably connected to the middle of the threshing box via bearings. A first dispersing paddle is fixedly connected to the outer surface of the stirring rod. A first circular gear is fixedly connected to the outer surface of the stirring rod. Four second circular gears are meshed with the outer surface of the first circular gear. A second dispersing paddle is fixedly connected to the shaft of each of the second circular gears. Each of the second dispersing paddles is rotatably connected to the threshing box via bearings.
[0010] Preferably, the screening mechanism includes four rectangular blocks symmetrically fixedly connected to the two side walls of the threshing box. Each rectangular block has a sliding rod that slides through it. A screen is fixedly connected to the top of each sliding rod. A return spring is sleeved on the outer surface of each sliding rod. The two ends of the return spring are fixedly connected to the rectangular block and the screen, respectively. A main bevel gear disk is fixedly connected to the bottom end of the first rotating rod. A secondary bevel gear disk is meshed with the outer surface of the main bevel gear disk. A second rotating rod is fixedly connected to the axis of the secondary bevel gear disk. The second rotating rod is rotatably connected to the threshing box through a bearing. Two cams are symmetrically fixedly connected to the outer surface of the second rotating rod.
[0011] Preferably, the feeding mechanism includes two mounting brackets symmetrically and fixedly connected to the top of the vehicle body. Two transport rollers are rotatably connected between the two mounting brackets via bearings. Two motors are fixedly connected to one side of one of the mounting brackets. One end of each of the two transport rollers is fixedly connected to the output shaft end of the corresponding motor. A transport belt is driven between the two transport rollers.
[0012] Preferably, the front of the threshing box is hinged to a sealing door, and a handle is fixedly connected to one side of the sealing door.
[0013] Preferably, the feed inlet is positioned corresponding to the top of the conveyor belt.
[0014] A harvesting method for alfalfa seeds using a harvester, comprising the following steps:
[0015] Step A: Loading: Move the harvester to the area where the mother plants are drying. By pushing the vehicle, the mother plants lying flat on the ground are lifted up by the pushing action of the shovel and placed on the loading mechanism. The loading mechanism then transports the mother plants into the threshing box.
[0016] Step B: Threshing and Cleaning: After the mother plant and the seeds attached to it fall into the threshing box, they will land on top of the filter plate. At this time, the operator can start the cylinder, which drives the moving bar and soft brush to move back and forth at the bottom of the filter plate. At the same time, through the linkage effect of the connecting components, the cylinder can drive the threshing mechanism to operate synchronously when it is started. The threshing mechanism is used to repeatedly beat the mother plant to knock off the seeds attached to it. Meanwhile, through the elasticity of the soft brush, the soft brush can penetrate into the filter holes on the filter plate. Using the driving force generated by the cylinder, the moving bar and soft brush can push out the seeds and impurities blocked in the filter holes of the filter plate, so that they can fall smoothly into the sieve.
[0017] Step C: Secondary Screening: When the cylinder starts, through the connection of the moving bar, rack, and connecting gear, it drives the threshing mechanism and rotates the main bevel gear disk. This, in turn, drives the second rotating rod and cam to rotate. When the cam's protruding end contacts the screen, it exerts downward pressure on the screen, causing the sliding rod to slide downward inside the rectangular block and compress the return spring. When the cam's protruding end moves away from the screen, the return spring's elasticity causes the screen to move upward, allowing it to move up and down repeatedly. This reciprocating motion of the screen lifts up seeds, broken leaves, and other impurities from the top of the screen, allowing the seeds to fall through the finer pores of the screen. The broken leaves and impurities remain on the top of the screen for secondary screening, resulting in cleaner seeds.
[0018] Compared with the prior art, the present invention provides an alfalfa seed harvester and harvesting method thereof, which has the following beneficial effects:
[0019] 1. This alfalfa seed harvester uses a cylinder to drive a moving bar and a soft brush to move repeatedly at the bottom of a filter plate. The elasticity of the soft brush allows it to penetrate deep into the filter holes on the filter plate. The resulting driving force pushes out seeds and impurities clogged in the filter holes, allowing them to fall smoothly. This design prevents the filter plate from becoming clogged during machine operation, ensuring smoother operation. Furthermore, through the interaction of the rack, connecting gear, first rotating rod, support block, driving belt gear, driven belt gear, and connecting belt, the cleaning mechanism, while preventing filter plate clogging, simultaneously drives the threshing mechanism. This allows the threshing mechanism to knock off seeds attached to the mother plant for collection. This design enables the cleaning and threshing mechanisms to operate synchronously, enhancing their interoperability.
[0020] 2. This alfalfa seed harvester, through the arrangement of rectangular blocks, sliding rods, screens, return springs, main bevel gear discs, secondary bevel gear discs, a second rotating rod, and cams, performs secondary screening of seeds falling onto the screen, separating the seeds from broken leaves and other impurities. This design allows the harvester to simultaneously knock down seeds and screen them, resulting in cleaner harvested seeds. Furthermore, the cleaning mechanism can be driven by connecting components, allowing the cylinder to drive the moving strips and soft brushes while simultaneously driving the screening mechanism. This design effectively utilizes the driving force generated by the cylinders, reducing the amount of power required. Its ingenious structure significantly increases the efficiency of seed harvesting.
[0021] 3. This alfalfa seed harvester uses a conveyor belt to feed the alfalfa seeds, replacing manual feeding. This reduces labor intensity and makes feeding simpler and more convenient.
[0022] The parts of this device not described herein are the same as or can be implemented using existing technologies. When the machine is running, this invention can prevent the filter plate from becoming clogged, making the machine run more smoothly. While the cleaning mechanism prevents the filter plate from becoming clogged, it can also simultaneously drive the threshing mechanism to operate, allowing the threshing mechanism to knock the seeds attached to the mother plant off for seed collection. At the same time, it can also perform secondary screening on the seeds that fall on the screen, separating the seeds from broken leaves and other impurities. Moreover, while the cylinder drives the moving bar and soft brush, it can also drive the screening mechanism to operate, effectively utilizing the driving force generated by the cylinder, reducing the amount of power required, and with its ingenious structure, greatly increasing the efficiency of seed harvesting. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of an alfalfa seed harvester proposed in this invention from a frontal view.
[0024] Figure 2 This is a schematic diagram of the internal structure of the threshing box of an alfalfa seed harvester proposed in this invention;
[0025] Figure 3 This is a frontal view schematic diagram of the structure of an alfalfa seed harvester proposed in this invention;
[0026] Figure 4 This is a side view schematic diagram of the structure of an alfalfa seed harvester proposed in this invention;
[0027] Figure 5 This is a rear-view schematic diagram of the structure of an alfalfa seed harvester proposed in this invention;
[0028] Figure 6 This is a schematic diagram showing the connection structure of the cleaning mechanism and connecting components of an alfalfa seed harvester proposed in this invention;
[0029] Figure 7 This is a schematic diagram of the threshing mechanism of an alfalfa seed harvester proposed in this invention.
[0030] In the diagram: 1. Vehicle body; 2. Threshing box; 3. Filter plate; 4. Cleaning mechanism; 401. Cylinder; 402. Moving bar; 403. Soft brush; 404. Rack; 5. Connecting assembly; 501. Connecting gear; 502. First rotating rod; 503. Support block; 504. Driven belt gear; 505. Driven belt gear; 506. Connecting belt; 6. Threshing mechanism; 601. Stirring rod; 602. First dispersing paddle; 603. First circular... 604. Gear; 605. Second circular gear; 606. Second dispersing paddle; 7. Screening mechanism; 701. Rectangular block; 702. Slide rod; 703. Screen; 704. Return spring; 705. Main bevel gear disk; 706. Secondary bevel gear disk; 707. Second rotating rod; 708. Cam; 8. Feeding mechanism; 801. Mounting frame; 802. Conveyor roller; 803. Motor; 804. Conveyor belt; 9. Feed inlet; 10. Shovel; 11. Sealing door. Detailed Implementation
[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0032] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0033] Example 1: Refer to Figures 1-7 An alfalfa seed harvester includes a vehicle body 1, a threshing box 2 fixedly connected to the top of the vehicle body 1, a filter plate 3 fixedly connected inside the threshing box 2, a cleaning mechanism 4 for preventing the filter plate 3 from clogging inside the threshing box 2, a threshing mechanism 6 for detaching seeds from the mother plant linked to the cleaning mechanism 4 via a connecting assembly 5, and a screening mechanism 7 for secondary seed screening linked to the connecting assembly 5, and a feeding mechanism 8 for feeding the mother plant into the threshing box 2 located on the top of the vehicle body 1, with the threshing box 2 close to the feeding mechanism 8. A feed inlet 9 is provided on one side wall. A shovel 10 is fixedly connected to one side of the vehicle body 1. The cleaning mechanism 4 includes a cylinder 401 fixedly connected to one side of the threshing box 2. A moving bar 402 is fixedly connected to one end of the extension rod of the cylinder 401. A soft brush 403 is fixedly connected to the top of the moving bar 402. A rack 404 is fixedly connected to one side of the moving bar 402. The rack 404 slides through the adjacent side wall of the threshing box 2. A sealing door 11 is hinged to the front of the threshing box 2. A handle is fixedly connected to one side of the sealing door 11.
[0034] In this invention, when the harvester is in use, it is moved to the area where the mother plants are drying. By pushing the vehicle body 1, the shovel 10 is used to scoop up the mother plants lying flat on the ground and place them on the feeding mechanism 8. The feeding mechanism 8 then transports the mother plants into the threshing box 2. This design allows for belt conveyor transport instead of manual transport, eliminating the need for manual standing and squatting, reducing labor intensity, and increasing feeding efficiency. After the mother plants and the seeds attached to them fall into the threshing box 2, they will land on top of the filter plate 3. At this point, the operator can activate the cylinder. 401. Cylinder 401 drives the moving bar 402 and the soft brush 403 to move back and forth at the bottom of the filter plate 3. Simultaneously, through the linkage effect of the connecting component 5, cylinder 401 can drive the threshing mechanism 6 to operate synchronously when it starts. The threshing mechanism 6 is used to repeatedly beat the mother plant to knock off the seeds attached to the mother plant, facilitating seed collection. At the same time, due to the elasticity of the soft brush 403, the soft brush 403 can penetrate into the filter holes on the filter plate 3. The driving force generated by cylinder 401 causes the moving bar 402 and the soft brush 403 to remove blockages. Seeds and impurities inside the filter holes of filter plate 3 are pushed out, allowing them to fall smoothly. This design prevents the filter plate 3 from clogging while the threshing mechanism 6 knocks the seeds down, ensuring smoother machine operation. Furthermore, the cleaning mechanism 4 and the threshing mechanism 6 can operate synchronously, enhancing the interoperability between the mechanisms. After the seeds separate from the mother plant, the seeds, along with the knocked-down debris and other impurities, fall through the filter holes of filter plate 3. Larger mother plants remain on top of filter plate 3 for further knocking, achieving initial screening. When the seeds fall to the bottom... When the screening mechanism 7 is in operation, the linkage effect of the connecting component 5 allows the cylinder 401 to drive the screening mechanism 7 to operate synchronously. The screening mechanism 7 is used to perform secondary screening of the seeds, separating the seeds from broken leaves and other impurities. This design can obtain relatively clean alfalfa seeds without the need for other screening machines, increasing harvesting efficiency and reducing operating costs. After screening, the workers can open the sealing door 11 to remove the screened seeds, broken leaves, and mother plants, thus completing the seed harvesting operation.
[0035] Example 2: Refer to Figures 1-7An alfalfa seed harvester includes a vehicle body 1. A threshing box 2 is fixedly connected to the top of the vehicle body 1. A filter plate 3 is fixedly connected inside the threshing box 2. A cleaning mechanism 4 is provided inside the threshing box 2 to prevent the filter plate 3 from clogging. A threshing mechanism 6 for detaching seeds from the mother plant is linked to the cleaning mechanism 4 via a connecting assembly 5. A screening mechanism 7 for secondary screening of the seeds is also linked to the connecting assembly 5. A feeding mechanism 8 for feeding the mother plant into the threshing box 2 is provided on the top of the vehicle body 1. A feed inlet 9 is opened on the side wall of the threshing box 2 near the feeding mechanism 8. A shovel 10 is fixedly connected to one side of the vehicle body 1. The connecting assembly 5 includes a connecting gear 501 meshing with the outer surface of a rack 404. A first rotating rod 502 is fixedly connected to the shaft of the connecting gear 501. Two support blocks 503 are fixedly connected to one side of the threshing box 2. The first rotating rod 502 is rotatably connected to two support blocks 503 via bearings. A drive belt gear 504 is fixedly connected to the top of the first rotating rod 502. A driven belt gear 505 is provided on the top of the threshing box 2. The drive belt gear 504 and the driven belt gear 505 are connected by a connecting belt 506. The threshing mechanism 6 includes a stirring rod 601 fixedly connected to the shaft of the driven belt gear 505. The stirring rod 601 is rotatably connected to the middle of the threshing box 2 via bearings. A first dispersing paddle 602 is fixedly connected to the outer surface of the stirring rod 601. A first circular gear 603 is fixedly connected to the outer surface of the stirring rod 601. Four second circular gears 604 are meshed with the outer surface of the first circular gear 603. A second dispersing paddle 605 is fixedly connected to the shaft of each of the second circular gears 604. The second dispersing paddles 605 are rotatably connected to the threshing box 2 via bearings.
[0036] In this invention, when the cylinder 401 drives the moving bar 402 to move forward or backward, it will drive the rack 404 to move together. Since the rack 404 is meshed with the connecting gear 501, it can drive the first rotating rod 502 and the driving belt gear 504 to rotate. The support block 503 is provided to support the first rotating rod 502 and enhance the stability of the first rotating rod 502 when it rotates. When the driving belt gear 504 rotates, it drives the driven belt gear 505 and the stirring rod 601 to rotate through the transmission action of the connecting belt 506. This design allows the cleaning mechanism 4 and the threshing mechanism 6 to be driven synchronously. This design enhances the interoperability between mechanisms, eliminating the need for a separate power supply to drive the threshing mechanism 6 and reducing energy consumption. When the stirring rod 601 rotates, it drives the first dispersing paddle 602 and the first circular gear 603 to rotate. Since the first circular gear 603 is meshed with four second circular gears 604, it in turn drives the four second dispersing paddles 605 to rotate. Through the rotational power of the first dispersing paddle 602 and the second dispersing paddle 605, the mother plant can be repeatedly beaten, knocking the seeds off. Compared to a single beating rod, this design provides a better beating effect, increases the number of seeds that fall, and reduces seed waste.
[0037] Example 3: Reference Figures 1-7 An alfalfa seed harvester includes a vehicle body 1, a threshing box 2 fixedly connected to the top of the vehicle body 1, a filter plate 3 fixedly connected inside the threshing box 2, a cleaning mechanism 4 for preventing the filter plate 3 from clogging inside the threshing box 2, a threshing mechanism 6 for detaching seeds from the mother plant linked to the cleaning mechanism 4 via a connecting component 5, and a screening mechanism 7 for secondary screening of the seeds linked to the connecting component 5, a feeding mechanism 8 for allowing the mother plant to enter the threshing box 2 located on the top of the vehicle body 1, a feed inlet 9 opened on one side wall of the threshing box 2 near the feeding mechanism 8, a shovel 10 fixedly connected to one side of the vehicle body 1, and the screening mechanism 7 including symmetrically fixed connections on both sides of the threshing box 2. The wall has four rectangular blocks 701, each with a sliding rod 702 sliding through it. A screen 703 is fixedly connected to the top of the sliding rod 702. A return spring 704 is sleeved on the outer surface of each sliding rod 702. The two ends of the return spring 704 are fixedly connected to the rectangular block 701 and the screen 703, respectively. A main bevel gear disk 705 is fixedly connected to the bottom of the first rotating rod 502. A secondary bevel gear disk 706 is meshed with the outer surface of the main bevel gear disk 705. A second rotating rod 707 is fixedly connected to the axis of the secondary bevel gear disk 706. The second rotating rod 707 is rotatably connected to the threshing box 2 through a bearing. Two cams 708 are symmetrically fixedly connected to the outer surface of the second rotating rod 707.
[0038] In this invention, after the seeds are initially screened by the filter plate 3, they fall into the screen 703. When the cylinder 401 is started, through the connection of the moving bar 402, rack 404, and connecting gear 501, it drives the threshing mechanism 6 while simultaneously rotating the main bevel gear disk 705. Since the main bevel gear disk 705 meshes with the secondary bevel gear disk 706, it drives the second rotating rod 707 and cam 708 to rotate. When the protruding end of the cam 708 contacts the screen 703, it exerts downward pressure on the screen 703, thereby causing the sliding rod 702 to slide downwards inside the rectangular block 701, compressing the return spring 704. When the protruding end of the cam 708 moves away from the screen 703, the elastic force of the return spring 704 causes the screen 703 to move upwards. The screen 703 can move up and down repeatedly. This design, through the reciprocating motion of the screen 703, can bounce up the seeds, broken leaves, and other impurities on the top of the screen 703, allowing the seeds to fall through the finer filter holes of the screen 703, while the broken leaves and impurities remain on the top of the screen 703 for secondary sieving of the seeds, resulting in cleaner seeds. Moreover, the bouncing of the screen 703 also has a certain anti-clogging effect, reducing the probability of the screen 703 becoming clogged. At the same time, through the linkage of the connecting component 5, the cylinder 401 can not only drive the cleaning mechanism 4 and the threshing mechanism 6 to operate, but also drive the screening mechanism 7 to operate synchronously. This effectively utilizes the driving force generated by the cylinder 401, reduces the number of power supplies, and has a clever structure that greatly increases the efficiency of seed harvesting.
[0039] Example 4: Reference Figures 1-7 An alfalfa seed harvester includes a vehicle body 1. A threshing box 2 is fixedly connected to the top of the vehicle body 1. A filter plate 3 is fixedly connected inside the threshing box 2. A cleaning mechanism 4 is provided inside the threshing box 2 to prevent the filter plate 3 from clogging. A threshing mechanism 6 for separating seeds from the mother plant is linked to the cleaning mechanism 4 via a connecting component 5. A screening mechanism 7 for secondary screening of the seeds is also linked to the connecting component 5. A feeding mechanism 8 for allowing the mother plant to enter the threshing box 2 is provided on the top of the vehicle body 1. A feeding opening is provided on the side wall of the threshing box 2 near the feeding mechanism 8. The feed inlet 9 is fixedly connected to one side of the vehicle body 1 with a shovel 10. The feeding mechanism 8 includes two mounting brackets 801 symmetrically fixedly connected to the top of the vehicle body 1. Two conveying rollers 802 are rotatably connected between the two mounting brackets 801 through bearings. Two motors 803 are fixedly connected to one side of one of the mounting brackets 801. One end of each of the two conveying rollers 802 is fixedly connected to the output shaft end of the corresponding motor 803. A conveyor belt 804 is driven between the two conveying rollers 802. The feed inlet 9 corresponds to the position of the top end of the conveyor belt 804.
[0040] In this invention, when the shovel 10 moves forward, it can shovel the mother plant onto the conveyor belt 804. The operator can simultaneously start two motors 803, which drive two conveyor rollers 802 to rotate, so that the conveyor belt 804 can rotate along with them. The conveyor belt 804 can push the mother plant to the feed inlet 9, so that it can enter the threshing box 2 from the feed inlet 9. The feed inlet 9 is set at the corresponding position at the top of the conveyor belt 804, so that the mother plant can enter the threshing box 2 more accurately. The conveyor belt 804 replaces manual transportation, making the feeding faster and more convenient.
[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. An alfalfa seed harvester, comprising a vehicle body (1), characterized in that, The top of the vehicle body (1) is fixedly connected to a threshing box (2), and a filter plate (3) is fixedly connected inside the threshing box (2). A cleaning mechanism (4) is provided inside the threshing box (2) to prevent the filter plate (3) from clogging. A threshing mechanism (6) for detaching seeds from the mother plant is linked to the cleaning mechanism (4) through a connecting component (5). A screening mechanism (7) for secondary screening of seeds is also linked to the connecting component (5). A feeding mechanism (8) for allowing the mother plant to enter the threshing box (2) is provided on the top of the vehicle body (1). A feed inlet (9) is opened on one side wall of the threshing box (2) near the feeding mechanism (8). A shovel (10) is fixedly connected to one side of the vehicle body (1). The cleaning mechanism (4) includes a cylinder (401) fixedly connected to one side of the threshing box (2). One end of the extension rod of the cylinder (401) is fixed with a moving bar (402). A soft brush (403) is fixedly connected to the top of the moving bar (402). A rack (404) is fixedly connected to one side of the moving bar (402). The rack (404) slides through the adjacent side wall of the threshing box (2). The connecting assembly (5) includes a connecting gear (501) meshing with the outer surface of the rack (404). A first rotating rod (502) is fixedly connected to the shaft of the connecting gear (501). Two support blocks (503) are fixedly connected to one side of the threshing box (2). The first rotating rod (502) is rotatably connected to the two support blocks (503) through bearings. A driving belt gear (504) is fixedly connected to the top of the first rotating rod (502). A driven belt gear (505) is provided on the top of the threshing box (2). The driving belt gear (504) and the driven belt gear (505) are connected by a connecting belt (506). The threshing mechanism (6) includes a stirring rod (601) fixedly connected to the shaft of the driven belt gear (505). The stirring rod (601) is rotatably connected to the middle of the threshing box (2) through bearings. A first dispersing paddle (602) is fixedly connected to the outer surface of the stirring rod (601). A first circular gear (603) is fixedly connected to the outer surface of the stirring rod (601). Four second circular gears (604) are meshed on the outer surface of the first circular gear (603). A second dispersing paddle (605) is fixedly connected to the shaft of each of the second circular gears (604). The second dispersing paddles (605) are rotatably connected to the threshing box (2) through bearings. The screening mechanism (7) includes four rectangular blocks (701) symmetrically fixedly connected to the two side walls of the threshing box (2). Each rectangular block (701) has a sliding rod (702) sliding through it. The top of the sliding rod (702) is fixedly connected to a screen (703). The outer surface of the sliding rod (702) is fitted with a return spring (704). The two ends of the return spring (704) are fixedly connected to the rectangular block (701) and the screen (703) respectively. The bottom end of the first rotating rod (502) is fixedly connected to a main bevel gear disk (705). The outer surface of the main bevel gear disk (705) is meshed with a secondary bevel gear disk (706). The shaft of the secondary bevel gear disk (706) is fixedly connected to a second rotating rod (707). The second rotating rod (707) is rotatably connected to the threshing box (2) through a bearing. The outer surface of the second rotating rod (707) is symmetrically fixedly connected to two cams (708).
2. The alfalfa seed harvester according to claim 1, characterized in that, The feeding mechanism (8) includes two mounting brackets (801) symmetrically fixedly connected to the top of the vehicle body (1). Two transport rollers (802) are rotatably connected between the two mounting brackets (801) through bearings. Two motors (803) are fixedly connected to one side of one of the mounting brackets (801). One end of each of the two transport rollers (802) is fixedly connected to the output shaft end of the corresponding motor (803). A transport belt (804) is connected between the two transport rollers (802).
3. An alfalfa seed harvester according to claim 1, characterized in that, The front of the threshing box (2) is hinged to a sealing door (11), and a handle is fixedly connected to one side of the sealing door (11).
4. An alfalfa seed harvester according to claim 2, characterized in that, The feed inlet (9) corresponds to the position of the top of the conveyor belt (804).
5. The harvesting method of an alfalfa seed harvester according to claim 1, characterized in that, Includes the following steps: Step A: Loading: Move the harvester to the area where the mother plants are drying. By pushing the vehicle body (1), the mother plants lying flat on the ground are lifted up by the pushing action of the shovel (10) and placed on the loading mechanism (8). The mother plants are then transported into the threshing box (2) through the loading mechanism (8). Step B: Threshing and Cleaning: After the mother plant and the seeds attached to it fall into the threshing box (2), they will land on top of the filter plate (3). At this time, the operator can start the cylinder (401). The cylinder (401) can drive the moving bar (402) and the soft brush (403) to move back and forth at the bottom of the filter plate (3). At the same time, through the linkage effect of the connecting component (5), the cylinder (401) can drive the threshing mechanism (6) to operate synchronously when it is started. The threshing mechanism (6) is used to repeatedly beat the mother plant to knock off the seeds attached to the mother plant. At the same time, the elasticity of the soft brush (403) allows the soft brush (403) to penetrate into the filter holes on the filter plate (3). The driving force generated by the cylinder (401) causes the moving bar (402) and the soft brush (403) to push out the seeds and impurities blocked in the filter holes of the filter plate (3) so that they can fall smoothly into the screen (703). Step C: Secondary screening: When the cylinder (401) starts, through the connection of the moving bar (402), rack (404) and connecting gear (501), it drives the threshing mechanism (6) to work, and at the same time drives the main bevel gear disk (705) to rotate. Therefore, it can drive the second rotating rod (707) and cam (708) to rotate. When the protruding end of the cam (708) contacts the screen (703), it generates downward pressure on the screen (703), thereby driving the slide rod (702) to slide downward inside the rectangular block (701), which in turn affects the return spring (702). 04) Compression is performed, and when the protruding end of the cam (708) moves away from the screen (703), the screen (703) can be moved upward by the elastic force of the return spring (704), so that the screen (703) can move up and down repeatedly. Through the reciprocating motion of the screen (703), the seeds, broken leaves and other impurities on the top of the screen (703) can be lifted up, so that the seeds can fall through the finer filter holes on the screen (703), while the broken leaves and impurities remain on the top of the screen (703) for secondary screening of the seeds, so that cleaner seeds can be obtained.
Citation Information
Patent Citations
Harvester for breeding of red adzuki beans
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Vibration cleaning sieve for rice pre-cleaning
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