Forage seed harvester

Abstract

The utility model belongs to the field of agricultural machinery, and provides a forage grass seed harvester which aims at solving the problem that in the prior art, when an inclined sieve plate vibrates, the flowing speed of seeds and sundries can be increased, and consequently seed screening is incomplete. Comprising a driving vehicle body, a seed harvester, a belt conveyor, a seed threshing structure, a screening box body, a screening plate, a shaking structure and an air supply structure, the screening plate continuously vibrates up and down under the cooperation of a first driving motor, a cam, a shaft rod, a pressing rod, a reset spring and a supporting ring, and the screening efficiency is improved; meanwhile, the fan can send air into the air bellow through the air pipe, and then the air is uniformly blown to the sieve plate through the strip-shaped air outlet, so that impurities such as seeds, ear residues and broken stems and leaves on the sieve plate are blown back for a certain distance for secondary sieving, the sieving time of the seeds and the impurities is prolonged, and the recovery rate of the seeds is further improved.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery, and in particular relates to a forage seed harvester. Background Technology

[0002] Current forage seed harvesters use a harvesting device to cut the seeds and then screen them to separate the seeds from impurities. In existing technology, the sieve plate is usually set at an angle, and a vibrating device is installed under the sieve plate. The seeds fall through the mesh of the sieve plate, while the impurities are discharged along the inclined sieve plate, thus separating the seeds from the impurities. However, because the sieve plate is inclined, the vibration of the sieve plate also increases the flow speed of the seeds and impurities on the sieve plate, resulting in incomplete screening and waste of seeds. At the same time, some forage seeds are tightly wrapped inside the ear, and it is difficult to effectively separate the seeds from the ear using traditional vibration screening methods. These incompletely threshed ears will be discharged along with the impurities, further causing waste. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] This invention provides a forage seed harvester to solve the following problems.

[0005] 1. The sieve plate is usually set at an angle and has a vibration device installed at the bottom, which speeds up the flow of seeds and impurities on the sieve plate, resulting in waste of seeds due to incomplete sieving.

[0006] 2. Some forage seeds are tightly wrapped inside the ear, and it is difficult to effectively separate the seeds from the ear using traditional vibrating sieving methods. These incompletely threshed ears will be discharged along with impurities, resulting in further waste.

[0007] (II) Technical Content

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A forage seed harvester includes a drive vehicle body and a seed harvester mounted at the front end of the drive vehicle body, and further includes a belt conveyor mounted on the drive vehicle body, with the seed harvester located above one side of the belt conveyor.

[0010] The seed threshing structure is mounted on the drive vehicle body, with the belt conveyor located above the inlet of the seed threshing structure on the side away from the seed harvester.

[0011] The screening box is mounted on the drive vehicle body. The screen plate is rotatably connected inside the screening box. The discharge port of the threshing structure passes through the screening box and extends to the top of the screen plate.

[0012] The vibrating structure is installed in the screening box and is used to drive the screen plate to vibrate.

[0013] An air supply structure, installed on the screening box, is used to intermittently supply air to the top of the sieve plate, extending the screening time for seeds.

[0014] Furthermore, the belt conveyor includes a conveyor belt and two rotating rollers, which are rotatably connected to the drive vehicle body. The conveyor belt is fitted onto the two rotating rollers, and the seed harvester is located above one side of the conveyor belt.

[0015] Furthermore, the seed threshing structure includes a threshing frame and a rotating shaft. The rotating shaft is rotatably connected to the threshing frame, and both ends of the rotating shaft extend out of the threshing frame and are rotatably connected to the drive vehicle body. Multiple first extrusion protrusions are circumferentially mounted on the rotating shaft, and multiple second extrusion protrusions are provided on the inner wall of the threshing frame. A gap is left between the first extrusion protrusions and the second extrusion protrusions.

[0016] The threshing frame has a feed inlet at the top and a discharge outlet at the bottom. The end of the conveyor belt away from the seed harvester is located above the feed inlet, and the discharge outlet passes through the screening box and extends above the screen plate.

[0017] Furthermore, the bottom of the screening box is funnel-shaped and has a discharge port, which is threadedly connected to a seed collection tank. One side of the screening box is open, and one end of the sieve plate is rotatably connected to the inner wall of the screening box.

[0018] The shaking structure includes a cam and a pressure rod. A first drive motor is installed on the screening box. The cam is fixedly sleeved on the end of the output shaft of the first drive motor. Ball bearings are slidably connected to the bottom of the cam and the top of the pressure rod. The two balls are in rolling contact. The pressure rod is slidably connected to the screening box and its bottom end slides through the screening box and abuts against the upper surface of the screen plate.

[0019] Furthermore, the shaking structure also includes a return spring and a T-shaped support rod. An inverted U-shaped mounting platform is fixed to the bottom of one side of the screening box opening. Two T-shaped support rods are symmetrically slidably connected on the mounting platform. Two support rings are symmetrically arranged on the horizontal section of the T-shaped support rods. The bottom of the screen plate away from the discharge port abuts against the support rings, and the screen plate is inclined after abutting.

[0020] The bottom end of the vertical section of the T-shaped strut slides through the mounting platform and extends below the mounting platform, and a spring limiting ring is fixedly sleeved at the end. A return spring is sleeved on the vertical section of the T-shaped strut, and the upper and lower ends of the return spring are fixedly connected to the mounting platform and the spring limiting ring, respectively.

[0021] Furthermore, the air supply structure includes a fan and an air box. The air box is installed on the top of the open side of the screening box. The air outlet of the fan is connected to the air box through multiple air ducts. The air box has multiple elongated air outlets on one side, and the air outlets face the side of the sieve plate away from the seed threshing structure.

[0022] Furthermore, a recycling hopper is detachably mounted on the drive vehicle body, with the end of the screen plate away from the discharge port located above the recycling hopper.

[0023] Furthermore, a baffle is provided on one side of the recycling hopper, with the top of the baffle fixedly connected to the drive vehicle body and an arc groove provided at the bottom.

[0024] Furthermore, a second drive motor is installed on the drive vehicle body, and the rotating shaft of the second drive motor is fixedly connected to the rotating shaft;

[0025] A drive gear disk and a driven gear disk are rotatably connected to one side of the drive vehicle body, and the drive gear disk and the driven gear disk mesh with each other;

[0026] Among them, a toothed disc is fixedly fitted on the roller and the rotating shaft on the side away from the seed harvester, and a toothed disc is fixedly connected to one side of the driving gear disc and the driven gear disc.

[0027] The toothed sprocket on the rotating shaft is connected to the toothed sprocket fixed to one side of the drive gear disk via chain drive;

[0028] The toothed disc on the rotating roller is connected to the toothed disc fixedly connected to one side of the driven gear disc via chain drive.

[0029] Furthermore, the number of teeth on the driven gear disk is greater than the number of teeth on the driving gear disk.

[0030] (III) Beneficial Effects

[0031] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0032] I. In this utility model, after the seeds are harvested by the seed harvester, the seeds are first separated from the ear by the seed threshing structure, and then screened to improve the seed recycling efficiency.

[0033] Second, in this utility model, the sieve plate vibrates continuously up and down under the cooperation of the first drive motor, cam, shaft, pressure rod, return spring, and support ring, thereby improving the screening efficiency. At the same time, the blower can send air into the air box through the air duct, and then blow the air evenly onto the sieve plate through the long strip-shaped air outlet, thereby blowing the seeds and ear residue, broken stems and leaves and other impurities on the sieve plate back a distance for secondary screening, thereby extending the screening time of seeds and impurities and further improving the seed recovery rate.

[0034] Third, in this utility model, the fan intermittently blows air through the air duct and air box, which can ensure that the impurities after screening can be discharged normally.

[0035] Fourth, in this utility model, the peeled ears and grains are fed into the feed inlet by a conveyor belt and fall between the first extrusion ridge and the second extrusion ridge. When the rotating shaft rotates, it will take the first extrusion ridge with it. The rotating first extrusion ridge applies a dynamic kneading force to the ears, while the stationary second extrusion ridge generates a reverse resistance to the moving ears, assisting in kneading the ears, thereby separating the seeds from the ears.

[0036] Fifth, in this utility model, the impurities after screening can be recovered and stored through the set recycling hopper, so as to facilitate centralized processing later.

[0037] VI. In this utility model, the baffle can block some of the panicle heads and broken stems and leaves floating in the air, and the panicle heads and broken stems and leaves can be stored in the arc groove, so that the collected panicle heads and broken stems and leaves can be screened to separate the seeds mixed in. Attached Figure Description

[0038] Figure 1 This is a three-dimensional schematic diagram of the entire utility model;

[0039] Figure 2 This is a schematic diagram of the internal structure of the drive vehicle body in this utility model;

[0040] Figure 3 This is a schematic diagram of the belt conveyor, driven gear disc, toothed disc, and chain in this utility model.

[0041] Figure 4 This is a partial cross-sectional view of the screening box and the threshing frame in this utility model;

[0042] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle;

[0043] Figure 6 This is a cross-sectional view of the seed threshing structure in this utility model;

[0044] Figure 7 This is a cross-sectional view of the screening box and the sieve plate in this utility model;

[0045] Figure 8 This is a schematic diagram of the shaking structure in this utility model;

[0046] Figure 9 This is a plan view of the discharge port, screen plate, and shaking structure in this utility model;

[0047] Figure 10for Figure 9 A magnified view of a portion of point B in the middle;

[0048] Figure 11 This is a schematic diagram of the reset spring, T-shaped support rod, support ring, and spring limiting ring in this utility model.

[0049] In the diagram: 1. Drive vehicle body; 2. Seed harvester; 3. Belt conveyor; 301. Conveyor belt; 302. Rotary roller; 4. Screening box; 401. Discharge port; 402. Mounting platform; 5. Screen plate; 6. Threshing frame; 601. Feed inlet; 602. Discharge outlet; 7. Rotating shaft; 8. First extrusion rib; 9. Second extrusion rib; 10. Seed collection tank; 11. Cam; 1101. Ball bearing; 12. Pressure rod; 13. First drive motor; 14. Return spring; 15. T-shaped support rod; 16. Support ring; 17. Spring limit ring; 18. Fan; 19. Air box; 20. Air duct; 21. Recycling hopper; 22. Baffle; 2201. Arc groove; 23. Second drive motor; 24. Drive gear disk; 25. Driven gear disk; 26. Gear sprocket; 27. Chain. Detailed Implementation

[0050] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0051] Example 1

[0052] like Figures 1-11 As shown, a forage seed harvester includes a drive vehicle body 1 and a seed harvester 2 mounted at the front end of the drive vehicle body 1. It also includes a belt conveyor 3 mounted on the drive vehicle body 1, with the seed harvester 2 located above and to one side of the belt conveyor 3. Specifically: Figure 2 and Figure 3 As shown, the belt conveyor 3 includes a conveyor belt 301 and two rotating rollers 302. The two rotating rollers 302 are rotatably connected to the drive vehicle body 1. The conveyor belt 301 is sleeved on the two rotating rollers 302. The seed harvester 2 is located above one side of the conveyor belt 301.

[0053] During operation, the ear and grain are separated by the seed harvester 2. The specific connection method and working process of the seed harvester 2 are the same as those of existing combine harvesters, and will not be described in detail. The separated ear and grain fall onto the conveyor belt 301, which then sends them to the seed threshing structure for threshing.

[0054] The forage seed harvester also includes a seed threshing structure mounted on the drive vehicle body 1. The belt conveyor 3, located on the side furthest from the seed harvester 2, is positioned above the feed inlet 601 of the seed threshing structure. Specifically: Figure 4 and Figure 6 As shown, the seed threshing structure includes a threshing frame 6 and a rotating shaft 7. The rotating shaft 7 is rotatably connected to the threshing frame 6, and both ends of the rotating shaft 7 extend out of the threshing frame 6 and are rotatably connected to the drive vehicle body 1. Multiple first extrusion protrusions 8 are circumferentially mounted on the rotating shaft 7, and multiple second extrusion protrusions 9 are provided on the inner wall of the threshing frame 6. A gap is left between the first extrusion protrusions 8 and the second extrusion protrusions 9.

[0055] The threshing frame 6 has a feed inlet 601 at the top and a discharge outlet 602 at the bottom. The end of the conveyor belt 301 away from the seed harvester 2 is located above the feed inlet 601.

[0056] The conveyor belt 301 delivers the peeled ears and kernels to the feed inlet 601 and they fall between the first extrusion ridge 8 and the second extrusion ridge 9. When the rotating shaft 7 rotates, it will take the first extrusion ridge 8 with it. The rotating first extrusion ridge 8 applies a dynamic kneading force to the ears, while the stationary second extrusion ridge 9 generates a reverse resistance to the moving ears, assisting in kneading the ears, thereby separating the seeds from the ears.

[0057] The forage seed harvester also includes a screening box 4 mounted on the drive vehicle body 1, such as Figures 7-11 As shown, a screen plate 5 is rotatably connected inside the screening box 4, and the discharge port 602 passes through the screening box 4 and extends above the screen plate 5.

[0058] Furthermore, such as Figure 1 and Figure 7 As shown, the bottom of the screening box 4 is funnel-shaped and has a discharge port 401. The discharge port 401 is threadedly connected to a seed collection tank 10. One side of the screening box 4 is open. One end of the sieve plate 5 is rotatably connected to the inner wall of the screening box 4. The screening box 4 is equipped with a shaking structure for driving the sieve plate 5 to shake. Specifically: as shown... Figure 8 As shown, the shaking structure includes a cam 11 and a pressure rod 12. A first drive motor 13 is installed on the screening box 4. The cam 11 is fixedly sleeved on the output shaft end of the first drive motor 13. The bottom of the cam 11 and the top of the pressure rod 12 are slidably connected with balls 1101. The two balls 1101 roll in contact. The pressure rod 12 is slidably connected to the screening box 4, and its bottom end slides through the screening box 4 and abuts against the upper surface of the screen plate 5. The cam 11 can squeeze the balls 1101 slidably connected to the pressure rod 12 through the balls 1101. The two balls 1101 can reduce the friction during contact.

[0059] Furthermore, such as Figure 9 and Figure 10 As shown, the shaking structure also includes a return spring 14 and a T-shaped support rod 15. A U-shaped mounting platform 402 is fixedly connected to the bottom of one side of the opening of the screening box 4. Two T-shaped support rods 15 are symmetrically slidably connected on the mounting platform 402. Two support rings 16 are symmetrically arranged on the horizontal section of the T-shaped support rod 15 for supporting the screen plate 5. The bottom of the side of the screen plate 5 away from the discharge port 602 abuts against the support rings 16, and the screen plate 5 is inclined after abutting.

[0060] The bottom end of the vertical section of the T-shaped support rod 15 slides through the mounting platform 402 and extends to the bottom of the mounting platform 402, and a spring limiting ring 17 is fixedly sleeved at the end. A return spring 14 is sleeved on the vertical section of the T-shaped support rod 15, and the upper and lower ends of the return spring 14 are fixedly connected to the mounting platform 402 and the spring limiting ring 17, respectively.

[0061] After threshing, seeds, ear residue, broken stems and leaves, and other impurities are discharged through the discharge port 602 onto the screen plate 5. The first drive motor 13 drives the cam 11 to rotate via the rotating shaft. When the cam 11 rotates, it squeezes the ball bearings 1101 at its bottom against the ball bearings 1101 slidably connected to the top of the pressure rod 12, causing the pressure rod 12 to slide downwards. When the pressure rod 12 slides downwards, the bottom end of the pressure rod 12 presses down on the screen plate 5, and the screen plate 5 presses down on the support ring 16, causing the T-shaped support rod 15 to slide downwards. At this time, the return spring 14 is stretched, and when the two ball bearings 1101... When contact stops, the pressure of the bottom end of the pressure rod 12 on the sieve plate 5 disappears. At this time, the return spring 14, which is in a stretched state, will contract and return to its original position. This will cause the T-shaped support rod 15 to slide upward through the spring limit ring 17. The T-shaped support rod 15 pushes the sieve plate 5 upward through the support ring 16 to return it to its original position. The sieve plate 5 will also push the pressure rod 12 to return to its original position, thereby causing the sieve plate 5 to vibrate continuously up and down, improving the screening efficiency. During the screening process, the seeds fall into the lower part of the sieve plate 5 through the holes on the sieve plate 5 and flow into the seed collection tank 10 through the discharge port 401 for storage.

[0062] The forage seed harvester also includes an air supply structure mounted on the drive vehicle body 1. This air supply structure is used to intermittently supply air to the top of the sieve plate 5, extending the seed sieving time. Specifically: Figure 4 and Figure 9 As shown, the air supply structure includes a fan 18 and an air box 19. The air box 19 is installed on the top of the open side of the screening box 4. The air outlet of the fan 18 is connected to the air box 19 through multiple air ducts 20. The air box 19 has multiple elongated air outlets on one side, and the air outlets face the side of the sieve plate 5 away from the seed threshing structure.

[0063] As the sieve plate 5 vibrates, the seeds fall through the holes in the sieve plate 5 and into the area below it. The blower 18 sends air through the air duct 20 into the air box 19, and then blows the air evenly onto the sieve plate 5 through the elongated air outlet. This blows the seeds, ear residue, broken stems and leaves and other impurities on the sieve plate 5 back a distance for secondary sieving, thereby extending the sieving time between the seeds and impurities and further improving the seed recovery rate. The blower 18 provides intermittent airflow through the air duct 20 and the air box 19 to ensure that the sieved impurities can be discharged normally.

[0064] Furthermore, such as Figure 2 and Figure 4 As shown, a recycling hopper 21 is detachably installed on the drive vehicle body 1. The end of the screen plate 5 away from the discharge port 602 is located above the recycling hopper 21. During the screening process, the seeds fall into the lower part of the screen plate 5 through the holes on the screen plate 5, while the impurities are discharged along the screen plate 5 into the recycling hopper 21 for recycling and storage, so as to facilitate centralized processing later.

[0065] Furthermore, such as Figures 2-5 As shown, a second drive motor 23 is installed on the drive vehicle body 1, and the rotating shaft of the second drive motor 23 is fixedly connected to the rotating shaft 7.

[0066] A drive gear disk 24 and a driven gear disk 25 are rotatably connected to one side of the drive vehicle body 1, and the drive gear disk 24 and the driven gear disk 25 mesh with each other;

[0067] Among them, a toothed disc 26 is fixedly sleeved on the rotating roller 302 and the rotating shaft 7 on the side away from the seed harvester 2, and a toothed disc 26 is fixedly connected to one side of the driving gear disk 24 and the driven gear disk 25.

[0068] The toothed sprocket 26 on the rotating shaft 7 is connected to the toothed sprocket 26 fixedly connected to one side of the drive gear disk 24 via a chain 27.

[0069] The toothed disc 26 on the rotating roller 302 is connected to the toothed disc 26 fixedly connected to one side of the driven gear disc 25 via a chain 27.

[0070] The second drive motor 23 drives the rotating shaft 7 to rotate counterclockwise via the rotating shaft, thereby providing power to the seed threshing structure. At the same time, the toothed disc 26 on the rotating shaft 7 will drive the toothed disc 26 fixedly connected to the drive gear disc 24 to rotate in the same direction via the chain 27. Under the meshing action, the driven gear disc 25 will rotate clockwise. At the same time, the toothed disc 26 fixedly connected to the driven gear disc 25 will drive the toothed disc 26 on the rotating roller 302 to rotate in the same direction via the chain 27, thereby causing the rotating roller 302 to rotate clockwise, so that the conveyor belt 301 can send the stripped ears of grain and kernels to the seed threshing structure for threshing.

[0071] Furthermore, the number of teeth on the driven gear disk 25 is greater than the number of teeth on the driving gear disk 24, thereby reducing the rotational speed of the roller 302, so that the detached ears of grain and kernels can be stably delivered to the seed threshing structure.

[0072] Example 2

[0073] like Figures 1-11 As shown, this embodiment has been improved on the basis of embodiment one as follows: Furthermore, a baffle 22 is provided on one side of the recycling hopper 21. The top of the baffle 22 is fixedly connected to the drive vehicle body 1, and an arc groove 2201 is provided at the bottom. When working in a windy environment, the baffle 22 can block some of the ear heads and broken stems and leaves floating in the air, and the arc groove 2201 can store the ear heads and broken stems and leaves, so as to facilitate the subsequent sieving of the collected ear heads and broken stems and leaves and separate the seeds mixed in.

[0074] In summary, the workflow of this utility model is as follows:

[0075] The seed harvester 2 separates the ears and kernels, which fall onto the conveyor belt 301. The conveyor belt 301 transports the separated ears and kernels to the feed inlet 601 and into the space between the first extrusion ridge 8 and the second extrusion ridge 9. When the rotating shaft 7 rotates, it will also rotate the first extrusion ridge 8. The rotating first extrusion ridge 8 applies a dynamic kneading force to the ears, while the stationary second extrusion ridge 9 generates a reverse resistance to the moving ears, assisting in kneading the ears and thus separating the seeds from the ears.

[0076] After threshing, seeds, ear residue, broken stems and leaves, and other impurities are discharged onto the screen plate 5 through the discharge port 602. The first drive motor 13 drives the cam 11 to rotate via the rotating shaft. When the cam 11 rotates, it squeezes the ball bearing 1101 at its bottom, which is slidably connected to the top of the pressure rod 12, causing the pressure rod 12 to slide downward. When the pressure rod 12 slides downward, the bottom end of the pressure rod 12 presses down on the screen plate 5. The screen plate 5 presses down on the support ring 16, causing the T-shaped support rod 15 to slide downward. At this time, the return spring 14 is stretched. When the two ball bearings 1101 stop contacting, the pressure of the bottom end of the pressure rod 12 on the screen plate 5 disappears. The stretched return spring 14 retracts and resets, thereby driving the T-shaped support rod 15 to slide upward through the spring limit ring 17. The T-shaped support rod 15 pushes the screen plate 5 upward through the support ring 16 to reset it. The screen plate 5 also pushes the pressure rod 12 to reset it, thus causing the screen plate 5 to vibrate continuously up and down.

[0077] At the same time, the blower 18 can send air into the air box 19 through the air duct 20, and then blow the air evenly onto the sieve plate 5 through the long strip-shaped air outlet. This blows the seeds, ear residues, broken stems and leaves and other impurities on the sieve plate 5 back a distance for secondary screening, thereby extending the screening time between seeds and impurities and further improving the seed recovery rate. The blower 18 provides intermittent airflow through the air duct 20 and the air box 19 to ensure that the screened impurities can be discharged normally.

[0078] During the screening process, the seeds fall through the holes on the sieve plate 5 and into the seed collection tank 10 through the discharge port 401 for storage. Impurities such as ear remnants and broken stems and leaves are discharged along the sieve plate 5 into the recycling hopper 21.

[0079] However, as is well known to those skilled in the art, the working principles and wiring methods of the drive vehicle body 1, seed harvester 2, first drive motor 13, fan 18 and second drive motor 23 are commonplace and belong to conventional means or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0080] The different embodiments described above can be combined, substituted, or used in combination with each other.

[0081] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0082] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A forage seed harvester, comprising a drive vehicle (1) and a seed harvester (2) mounted at the front end of the drive vehicle (1), characterized in that: It also includes a belt conveyor (3), which is mounted on the drive vehicle body (1), and the seed harvester (2) is located above one side of the belt conveyor (3); The seed threshing structure is installed on the drive vehicle body (1), and the belt conveyor (3) is located above the feed inlet (601) of the seed threshing structure on the side away from the seed harvester (2). The screening box (4) is mounted on the drive vehicle body (1). The screening box (4) is rotatably connected to the screen plate (5). The discharge port (602) of the threshing structure passes through the screening box (4) and extends to the top of the screen plate (5). A shaking structure is installed in the screening box (4) and is used to drive the screen plate (5) to shake. An air supply structure is installed on the screening box (4). The air supply structure is used to intermittently supply air to the top of the sieve plate (5) to extend the screening time of the seeds.

2. The forage seed harvester according to claim 1, characterized in that: The belt conveyor (3) includes a conveyor belt (301) and two rotating rollers (302). The two rotating rollers (302) are rotatably connected to the drive vehicle body (1). The conveyor belt (301) is sleeved on the two rotating rollers (302). The seed harvester (2) is located above one side of the conveyor belt (301).

3. The forage seed harvester according to claim 2, characterized in that: The seed threshing structure includes a threshing frame (6) and a rotating shaft (7). The rotating shaft (7) is rotatably connected to the threshing frame (6), and both ends of the rotating shaft (7) extend out of the threshing frame (6) and are rotatably connected to the drive vehicle body (1). Multiple first extrusion protrusions (8) are installed on the rotating shaft (7) in a circular pattern. Multiple second extrusion protrusions (9) are provided on the inner wall of the threshing frame (6). A gap is left between the first extrusion protrusions (8) and the second extrusion protrusions (9). The threshing frame (6) has a feed inlet (601) at the top and a discharge outlet (602) at the bottom. The end of the conveyor belt (301) away from the seed harvester (2) is located above the feed inlet (601), and the discharge outlet (602) passes through the screening box (4) and extends to the top of the screen plate (5).

4. The forage seed harvester according to claim 3, characterized in that: The bottom of the screening box (4) is funnel-shaped and has a discharge port (401). The discharge port (401) is threadedly connected to a seed collection tank (10). One side of the screening box (4) is open, and one end of the sieve plate (5) is rotatably connected to the inner wall of the screening box (4). The shaking structure includes a cam (11) and a pressure rod (12). A first drive motor (13) is installed on the screening box (4). The cam (11) is fixedly sleeved on the output shaft end of the first drive motor (13). The bottom of the cam (11) and the top of the pressure rod (12) are slidably connected with ball bearings (1101). The two ball bearings (1101) roll in contact. The pressure rod (12) is slidably connected to the screening box (4), and its bottom end slides through the screening box (4) and abuts against the upper surface of the screen plate (5).

5. The forage seed harvester according to claim 4, characterized in that: The shaking structure also includes a reset spring (14) and a T-shaped support rod (15). A U-shaped mounting platform (402) is fixedly connected to the bottom of one side of the opening of the screening box (4). Two T-shaped support rods (15) are symmetrically slidably connected on the mounting platform (402). Two support rings (16) are symmetrically arranged on the horizontal section of the T-shaped support rod (15). The bottom of the side of the screen plate (5) away from the discharge port (602) abuts against the support rings (16), and the screen plate (5) is inclined after abutting. The bottom end of the vertical section of the T-shaped support rod (15) slides through the mounting platform (402) and extends to the bottom of the mounting platform (402), and a spring limiting ring (17) is fixedly sleeved at the end. A reset spring (14) is sleeved on the vertical section of the T-shaped support rod (15), and the upper and lower ends of the reset spring (14) are fixedly connected to the mounting platform (402) and the spring limiting ring (17) respectively.

6. The forage seed harvester according to claim 5, characterized in that: The air supply structure includes a fan (18) and a wind box (19). The wind box (19) is installed on the top of the open side of the screening box (4). The air outlet of the fan (18) is connected to the wind box (19) through multiple air pipes (20). The wind box (19) has multiple long air outlets on one side, and the air outlets face the side of the sieve plate (5) away from the seed threshing structure.

7. The forage seed harvester according to claim 5, characterized in that: A recycling hopper (21) is detachably mounted on the drive vehicle body (1), and the end of the screen plate (5) away from the discharge port (602) is located above the recycling hopper (21).

8. The forage seed harvester according to claim 7, characterized in that: A baffle (22) is provided on one side of the recycling hopper (21). The top of the baffle (22) is fixedly connected to the drive vehicle body (1), and an arc groove (2201) is provided at the bottom.

9. The forage seed harvester according to claim 3, characterized in that: A second drive motor (23) is installed on the drive vehicle body (1), and the rotating shaft of the second drive motor (23) is fixedly connected to the rotating shaft (7); One side of the drive vehicle body (1) is also rotatably connected to a drive gear disk (24) and a driven gear disk (25), which mesh with each other; Among them, a toothed disc (26) is fixedly sleeved on the roller (302) and the rotating shaft (7) on the side away from the seed harvester (2), and a toothed disc (26) is fixedly connected to one side of the driving gear disk (24) and the driven gear disk (25). The toothed sprocket (26) on the rotating shaft (7) is connected to the toothed sprocket (26) fixedly connected to one side of the drive gear disk (24) via a chain (27); The toothed disc (26) on the roller (302) is connected to the toothed disc (26) fixedly connected to one side of the driven gear disc (25) via a chain (27).

10. The forage seed harvester according to claim 9, characterized in that: The number of teeth of the driven gear disk (25) is greater than the number of teeth of the driving gear disk (24).

Images