Seeder seed blocking mechanism suitable for small seeds

Abstract

The utility model provides a seeder seed blocking mechanism suitable for small seeds, and belongs to the technical field of seeders. The problem of how to improve the single seeding precision of the seeding machine is solved. According to the seeding machine seed blocking mechanism suitable for the small seeds, a seeding machine comprises a seed metering wheel and an inner wheel body internally provided with a containing cavity, an opening communicated with the containing cavity is formed in the bottom of the inner wheel body, and the seed metering wheel is rotationally connected into the inner wheel body and located below the opening; the seed blocking mechanism comprises a seed blocking plate and an installation support arranged outside the seed metering wheel in a sleeving mode, the seed blocking plate and the installation support are detachably connected with the inner wheel body and block the opening, and a seed inlet communicated with the opening is formed in the outer side wall of the installation support in the circumferential direction; elastic seed scraping pads close to the outer wall of the seed metering wheel are arranged on the mounting bracket and are positioned at the two ends of the seed inlet. The seeding machine seed blocking mechanism suitable for small seeds can improve the single seeding precision of the seeding machine.

Description

Technical Field

[0001] This utility model belongs to the field of seeder technology and relates to a seed-stopping mechanism for seeders suitable for small seeds. Background Technology

[0002] Seeders are agricultural machines used for large-area sowing in the current technology. They are favored by growers because they replace the manual sowing method used in traditional technology with their high sowing efficiency.

[0003] In existing technology, seeders generally include traveling wheels and a handlebar frame connected to the traveling wheels. The traveling wheels, as a major component assembly, typically include a seed box, an inner wheel body connected to the seed box, side covers rotatably connected to both sides of the inner wheel body via a rotating shaft, and several beaks detachably connected to the two side covers around the circumference of the traveling wheels. A brush wheel is rotatably connected to the inner wheel body via a rotating shaft. The seed-discharging wheel is positioned on the output gear of the gear set, with the outer wall of the brush wheel in contact with the outer wall of the seed-discharging wheel. During use, the seed box feeds seeds into the inner wheel body, and due to gravity, the seeds fall into the seed grooves circumferentially opened on the seed-discharging wheel. The rotating brush wheel scrapes away excess seeds, ensuring that each seed groove contains exactly one seed. Driven by the gear set, the seed-discharging wheel rotates continuously, causing the seed-containing grooves to rotate downwards. The seeds then fall into the beaks due to gravity and are sown into the soil.

[0004] As we all know, different kinds of seeds have different sizes. Especially for small seeds like rapeseed, although there are brush wheels, the small size of the seeds and the density of the bristles on the brush wheel make it impossible for the brush wheel to scrape off the excess seeds, thus making it impossible to ensure accurate sowing. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a seed-blocking mechanism for seeders suitable for small seeds. The technical problem this invention aims to solve is: how to improve the single-seed planting accuracy of seeders.

[0006] The objective of this utility model can be achieved through the following technical solution: A seed-blocking mechanism for a seeder suitable for small seeds, the seeder includes a seed-discharging wheel and an inner wheel body with an internal receiving cavity, the bottom of the inner wheel body has an opening communicating with the receiving cavity, the seed-discharging wheel is rotatably connected in the inner wheel body and located below the opening, characterized in that the seed-blocking mechanism includes a seed-blocking plate and a mounting bracket sleeved outside the seed-discharging wheel, the seed-blocking plate and the mounting bracket are both detachably connected to the inner wheel body and seal the opening, the outer side wall of the mounting bracket has a seed inlet communicating with the opening in the circumferential direction, and the mounting bracket is provided with elastic seed-scraping pads close to the outer wall of the seed-discharging wheel at both ends of the seed inlet.

[0007] In this seed-stopping mechanism for a seeder suitable for small seeds, the seeder includes an inner wheel with a receiving cavity. This cavity specifically receives and temporarily stores seeds discharged from the seed box, and the seeds in the receiving cavity can be discharged through an opening at the bottom of the inner wheel. A seed-discharging wheel is installed below the opening in the inner wheel. During sowing, the seeds discharged from the opening can be embedded into a seed groove on the outer wall of the seed-discharging wheel. When the seed-discharging wheel rotates so that the opening of the seed groove faces downward, the seeds can be lifted out of the seed groove by gravity and fall into the seeder's beak, which then sows the seeds into the soil. Under this premise, to cope with the precise sowing of small seeds, this application abandons the structure of the seed-discharging wheel and brush wheel in the prior art. Instead, a mounting bracket with a seed inlet is installed on the outer wall of the seed-discharging wheel, and an additional seed-stopping plate is provided. Both the mounting bracket and the seed-stopping plate are detachably connected. The inner wheel is fitted with a device that, together with the inner wheel, seals the opening, ensuring that seeds discharged through the opening can only enter the seed groove of the seed metering wheel through the seed inlet on the mounting bracket. To prevent large gaps between the two ends of the seed inlet on the bracket and the seed metering wheel, causing excess seeds to fall through, elastic seed scraping pads are installed close to the outer wall of the seed metering wheel at both ends of the seed inlet on the mounting bracket. This appropriately reduces the gap between the two ends of the seed inlet on the mounting bracket and the outer wall of the seed metering wheel. Furthermore, the seed scraping pads are made of elastic materials (such as rubber or silicone), which not only prevents excess seeds from leaking out of the seed inlet but also ensures that the seeds embedded in the seed groove can push against the elastic seed scraping pads and deform as the seed metering wheel rotates. The deformation of the elastic seed scraping pads repositions the seeds embedded in the seed groove, thus ensuring the single-seed planting accuracy of the seeder.

[0008] In the aforementioned seed-blocking mechanism for a seeder suitable for small seeds, the opening is elongated, the mounting bracket abuts against the inner wall of one end of the opening, and slots are provided on the inner walls of both sides of the other end of the opening. The seed-blocking plate is elongated, and its two sides are engaged in the slots. One end of the seed-blocking plate abuts against the inner wall of the other end of the opening, and the other end abuts against the outer wall of the mounting bracket. This arrangement ensures the connection stability of the seed-blocking plate. Furthermore, the abutting action between the seed-blocking plate and the outer wall of the bracket, along with the abutting action between the seed-blocking plate and one end of the mounting opening, and the abutting action between the mounting bracket and the other end of the seed-blocking plate, effectively seals the opening, allowing seeds to be discharged only from the seed inlet on the mounting bracket, thus ensuring the single-seed sowing accuracy of the seeder.

[0009] In the aforementioned seed-stopping mechanism for a seeder suitable for small seeds, the mounting bracket includes a disc-shaped plate body one and a plate body two with their surfaces facing each other. One side of the plate body one has spaced partitions along its circumferential edge. Each partition abuts against one side of the plate body two and is locked in place by fasteners. The seed inlet is formed between the two partitions. This ensures the mounting bracket structure is robust while also allowing for detachment, ensuring that the seed metering wheel, rotatably connected within the mounting bracket, can be disassembled and replaced according to user needs.

[0010] In the seed-blocking mechanism of the seeder suitable for small seeds described above, each of the partition plates is vertically and curved. Two slots (slot 1) are formed on the edge of the plate facing the second plate, with the upper ends of the two slots (slot 1) and the two partition plates adjacent to each other. Two slots (slot 2) are formed on the edge of the second plate facing the first plate, with the two slots (slot 1) and two slots (slot 2) positioned opposite each other. The elastic seed-scraping pads are elongated, with one end inserted into a slot (slot 1) and the other end inserted into a slot (slot 2). This interlocking connection ensures the stability of the seed-scraping pads, prevents displacement when pushed by seeds, and effectively prevents excess seeds from leaking out through the gaps.

[0011] In the seed-blocking mechanism of the seeder suitable for small seeds described above, the edge of the second plate facing the first plate has two U-shaped blocks, the second slot is formed in the U-shaped blocks, and the upper outer edge of each partition portion has an abutment portion along the width direction. The abutment portion abuts against the U-shaped blocks, and the elastic seed-scraping pad abuts against the abutment portion. Through the abutment cooperation of the U-shaped blocks and the abutment portion, the positioning of the first plate and the second plate is ensured to be firm when they are assembled together, thereby ensuring that the fasteners for subsequent assembly are more convenient. In addition, the partition portion can also abut against the middle outer wall of the seed-scraping pad, so that the middle part of the seed-scraping pad is fully limited and prevented from being squeezed outward by the seeds.

[0012] In the aforementioned seed-blocking mechanism for a seeder suitable for small seeds, the elastic seed-scraping pad includes insertable portions at both ends and a seed-scraping portion in the middle. The seed-scraping portion is disposed close to the outer circumference of the seed-discharging wheel. One of the insertable portions is inserted into slot one, and the other insertable portion is inserted into slot two. Specifically, the seed-scraping pad is inserted into slot one and slot two through the insertable portions at both ends, ensuring a firm connection while scraping off excess seed material by having the seed-scraping portion in the middle close to the outer wall of the seed-discharging wheel.

[0013] In the seed-stopping mechanism of the seeder suitable for small seeds described above, the two seed scraping parts have inclined guide surfaces on opposite sides of the seed metering wheel along the circumference. Each guide surface forms a flared gap with the outer circumferential surface of the seed metering wheel, facing the seed inlet. This guides the seeds embedded in the seed trough, preventing them from being squeezed out of the seed trough by the seed scraping pad during the rotation of the seed metering wheel.

[0014] In the aforementioned seed-stopping mechanism for a seeder suitable for small seeds, an installation port is provided on one side of the inner wheel body, and the mounting bracket, together with the seed-discharging wheel, is embedded in the installation port. The mounting bracket is specifically embedded in the installation port, thereby achieving a detachable connection with the inner wheel body. It is worth mentioning that, to ensure the precise seeding effect of this application, in addition to existing technologies, directly using an elastic seed-scraping pad with the original-sized seed-discharging wheel would inevitably cause interference between the seed-discharging wheel and the installation port. Therefore, this application makes the seed-discharging wheel smaller than in existing technologies and uses a mounting bracket to fill the gap between the smaller seed-discharging wheel and the installation port, ensuring that the compatibility between the seed-discharging wheel and the inner wheel body meets the usage requirements. Simultaneously, the mounting bracket can also serve as a carrier for assembling the elastic seed-scraping pad, thereby scraping away excess seed material from the surface of the seed-discharging wheel, thus achieving the effect of precise seeding.

[0015] In the aforementioned seed-stopping mechanism for a seeder suitable for small seeds, the inner wall of the mounting opening has a circumferential abutment edge. Between the inner wall of the mounting opening and the abutment edge, there are two opposing L-shaped limiting blocks arranged circumferentially. The outer circumferential wall of the plate has two opposing circumferential positioning ribs. The plate abuts against the abutment edge, and the positioning ribs abut against and are pressed down by the limiting blocks. When installing the mounting bracket, the abutment edge supports the plate, thereby limiting the embedding depth of the mounting bracket. Simultaneously, after rotating it a certain distance, the positioning ribs on the outer wall of the plate abut against the limiting blocks, and the positioning ribs are pressed down by the limiting blocks. Through the limiting blocks' control of the limiting ribs, the plate and the entire mounting bracket are firmly positioned within the mounting opening.

[0016] Compared with existing technologies, this seed-stopping mechanism for seeders suitable for small seeds has the following advantages:

[0017] By installing a mounting bracket on the outer side of the seed metering wheel and detachably connecting it to the inner wheel body, and by using the mounting bracket and the seed baffle plate to seal the opening in the inner wheel body that connects to the receiving cavity, the seeds can only be output from the seed inlet on the mounting bracket. Secondly, elastic seed scraping pads are set on both ends of the seed inlet on the mounting bracket, close to the outer wall of the seed metering wheel. This ensures that the seeds embedded in the seed groove of the seed metering wheel can be discharged normally while ensuring that excess seeds can be scraped off, thereby achieving precise single-seed sowing by the seeder. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the seed-blocking mechanism of a seeder suitable for small seeds.

[0019] Figure 2 This is a cross-sectional view and a partial enlarged view of the seed-blocking mechanism of a seeder suitable for small seeds, cut radially along the inner wheel body.

[0020] Figure 3 This is a schematic diagram of the inner wheel structure and a magnified view of a portion thereof.

[0021] Figure 4 It is a sectional view of the inner wheel body cut radially.

[0022] Figure 5 This is a schematic diagram of the structure of the mounting bracket and seeding wheel assembled into one unit.

[0023] Figure 6 It is a sectional view of the mounting bracket cut along the radial direction of the seeding wheel and a partial enlarged view.

[0024] Figure 7 This is a structural schematic diagram of plate one.

[0025] Figure 8 This is a structural schematic diagram of plate two.

[0026] Figure 9 This is a schematic diagram of the structure of the elastic seed scraper pad.

[0027] In the diagram, 1. Seed metering wheel; 2. Inner wheel body; 21. Receiving cavity; 22. Opening; 221. Slot; 23. Mounting port; 231. Abutment edge; 232. Limiting block; 3. Seed baffle plate; 4. Mounting bracket; 41. Seed inlet; 42. Elastic seed scraping pad; 421. Insertion part; 422. Seed scraping part; 4221. Guide surface; 43. Plate body one; 431. Partition part; 4311. Slot one; 4312. Abutment part; 432. Positioning rib; 44. Plate body two; 441. Slot two; 442. U-shaped block; 5. Gap. Detailed Implementation

[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] like Figure 1-4As shown, in this seed-blocking mechanism for a seeder suitable for small seeds, the seeder includes a seed-discharging wheel 1 and an inner wheel body 2 with an internal receiving cavity 21. The bottom of the inner wheel body 2 has an opening 22 that communicates with the receiving cavity 21 and is elongated along the circumference of the inner wheel body 2. In actual use, the seed box can input seeds into the receiving cavity 21 of the inner wheel body 2, and the seeds are discharged outwards from the receiving cavity 21 through the opening 22 into the seed container for sowing. The seed-blocking mechanism includes a mounting bracket 4 and an elongated seed-blocking plate 3. The mounting bracket 4 is detachably connected to the inner wheel body 2 and located below the opening 22. The mounting bracket 4 is sleeved on the outside of the seed metering wheel 1 and abuts against the inner wall of one end of the opening 22. The inner walls on both sides of the other end of the opening 22 are provided with slots 221. One end of the seed baffle plate 3 abuts against the inner wall of the other end of the opening 22 and both sides are inserted into the slots 221. Under the premise of ensuring the stable assembly of the seed baffle plate 3, the other end of the seed baffle plate 3 abuts against the outer wall of the mounting bracket 4, so that the mounting bracket 4 and the seed baffle plate 3 cooperate to seal the opening 22.

[0030] Combination Figure 5-9 The mounting bracket 4 specifically includes a disc-shaped plate 43 and a plate 44 arranged opposite to each other. Two partition portions 431 are spaced apart circumferentially on the edge of the side of plate 43 facing plate 43. After the seeding wheel 1 is mounted on plate 43, plate 43 is secured by the edges of the partition portions 431 and plate 44, and screwed together to form the mounting bracket 4. Furthermore, the two partition portions 431 are spaced apart circumferentially on plate 43. The long, curved strip can limit the position of the seed metering wheel 1. The upper ends of the two partition sections 431 on the mounting bracket 4 form a seed inlet 41 that is arranged around the circumference of the mounting bracket 4 and connects to the opening 22. The lower ends of the two partition sections 431 on the mounting bracket 4 form a seed outlet that is arranged around the circumference of the mounting bracket 4 and connects to the seed inlet 41. Elastic seed scraping pads 42 are provided at both ends of the seed inlet 41 on the mounting bracket 4, close to the surface of the seed metering wheel 1.

[0031] Specifically, two slots 4311 are formed on the plate 43 adjacent to the upper edge of the partition 431. U-shaped blocks 442 are integrally formed on the plate 44 corresponding to the two slots 4311, and each U-shaped block 442 forms a slot 441 opposite to the position of the slot 4311. The elastic seed scraping pad 42 is made of rubber and includes insertion portions 421 at both ends and a seed scraping portion 422 in the middle. One insertion portion 421 is inserted into the slot 4311, and the other insertion portion 422 is inserted into... Inside slot 2 441, the seed scraping part 422 is set close to the outer wall of the seed metering wheel 1. In addition, the upper outer edge of each partition part 431 has an abutment part 4312 along the width direction. One end of the abutment part 4312 abuts against the U-shaped block 442, and the seed scraping part 422 of the elastic seed scraping pad 42 abuts against the abutment part 4312. The two seed scraping parts 422 are provided with guide surfaces 4221 on opposite sides of the seed metering wheel 1 around the circumference. Each guide surface 4221 is set close to the outer wall of the seed metering wheel 1 and forms a flared gap 5 with the outer wall of the seed metering wheel 1.

[0032] like Figure 3 and Figure 6 As shown, an installation port 23 is provided on the inner wheel body 2. The inner wall of the installation port 23 has an abutment edge 231 along the circumferential direction. The installation bracket 4 is embedded in the installation port 23 and the plate body 43 abuts against the abutment edge 231. The outer wall of the plate body 43 has a positioning rib 432 that protrudes outward in a long strip shape along the circumferential direction. There are two spaced L-shaped limiting blocks 232 integrally formed between the inner wall of the installation port 23 and the abutment edge 231. During installation, the user can screw the installation bracket 4 so that the positioning ribs 432 and the limiting blocks 232 on the outer wall of the plate body 43 abut against each other, and the positioning ribs 432 are pressed down by the limiting blocks 232, thereby completing the installation of the installation bracket 4 and the seeding wheel 1.

[0033] When in use, the seeds are discharged from the receiving cavity 21 through the opening 22. Due to the presence of the mounting bracket 4 and the seed baffle 3, the opening 22 is blocked. The seeds can only enter the mounting bracket 4 through the seed inlet 41 and be discharged through the seed outlet. During this process, only one seed can enter the seed trough through the seed inlet 41. Then, as the seed metering wheel 1 rotates, the presence of the elastic seed baffle pad can block the excess seeds and ensure that the seeds in the seed trough of the seed metering wheel 1 rotate with the seed metering wheel 1 under the guidance of the guide surface 4221 until the seed trough opening faces downward and connects to the seed outlet. The seeds fall out of the seed outlet and enter the duckbill for sowing.

[0034] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0035] Although this document frequently uses terms such as seed metering wheel 1, inner wheel body 2, receiving cavity 21, opening 22, slot 221, mounting port 23, abutment edge 231, limiting block 232, seed baffle 3, mounting bracket 4, seed inlet 41, elastic seed scraping pad 42, insertion part 421, seed scraping part 422, guide surface 4221, plate body one 43, partition part 431, slot one 4311, abutment part 4312, positioning rib 432, plate body two 44, slot two 441, U-shaped block 442, and gap 5, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A seed-stopping mechanism for a seeder suitable for small seeds, the seeder comprising a seed-discharging wheel (1) and an inner wheel body (2) having an internal receiving cavity (21), the bottom of the inner wheel body (2) having an opening (22) communicating with the receiving cavity (21), the seed-discharging wheel (1) being rotatably connected in the inner wheel body (2) and located below the opening (22), characterized in that, The seed blocking mechanism includes a seed blocking plate (3) and a mounting bracket (4) sleeved on the outside of the seed discharging wheel (1). The seed blocking plate (3) and the mounting bracket (4) are detachably connected to the inner wheel body (2) and block the opening (22). The outer side wall of the mounting bracket (4) has a seed inlet (41) communicating with the opening (22) along the circumferential direction. The mounting bracket (4) is provided with elastic seed scraping pads (42) close to the outer wall of the seed discharging wheel (1) at both ends.

2. The seed-stopping mechanism for a seeder suitable for small seeds according to claim 1, characterized in that, The opening (22) is elongated, and the mounting bracket (4) abuts against the inner wall of one end of the opening (22). The inner walls on both sides of the other end of the opening (22) are provided with slots (221). The seed-blocking plate (3) is elongated, and both sides of the seed-blocking plate (3) are engaged in the slots (221). One end of the seed-blocking plate (3) abuts against the inner wall of the other end of the opening (22), and the other end abuts against the outer wall of the mounting bracket (4).

3. The seed-stopping mechanism for a seeder suitable for small seeds according to claim 1 or 2, characterized in that, The mounting bracket (4) includes a disc-shaped plate (43) and a plate (44) with their surfaces facing each other. One side of the plate (43) has spaced partitions (431) along its circumferential direction. Each partition (431) abuts against one side of the plate (44) and is locked in place by fasteners. The seed inlet (41) is formed between the two partitions (431).

4. The seed-stopping mechanism for a seeder suitable for small seeds according to claim 3, characterized in that, Each of the partition portions (431) is vertically and curved. Two slots (4311) are opened on the edge of the plate body one (43) facing the plate body two (44). The upper ends of the two slots (4311) and the two partition portions (431) are adjacent. Two slots (441) are opened on the edge of the plate body two (44) facing the plate body one (43). The two slots (4311) and the two slots (441) are positioned opposite each other. The elastic seed scraping pad (42) is long and narrow. One end of each elastic seed scraping pad (42) is inserted into the slot one (4311) and the other end is inserted into the slot two (441).

5. The seed-stopping mechanism for a seeder suitable for small seeds according to claim 4, characterized in that, The second plate (44) has two U-shaped blocks (442) on the edge of the side facing the first plate (43). The second slot (441) is formed in the U-shaped block (442). The upper outer edge of each partition (431) has an abutment (4312) along the width direction. The abutment (4312) abuts against the U-shaped block (442). The elastic seed scraper pad (42) abuts against the abutment (4312).

6. The seed-stopping mechanism for a seeder suitable for small seeds according to claim 4, characterized in that, The elastic seed scraping pad (42) includes two end plugs (421) and a middle seed scraping part (422). The seed scraping part (422) is disposed close to the outer peripheral surface of the seed metering wheel (1). One of the plugs (421) is plugged into the first slot (4311), and the other plug (421) is plugged into the second slot (441).

7. The seed-stopping mechanism for a seeder suitable for small seeds according to claim 6, characterized in that, The two seed scraping parts (422) have inclined guide surfaces (4221) on opposite sides of the seed metering wheel (1) and a gap (5) is formed between each guide surface (4221) and the outer peripheral surface of the seed metering wheel (1) facing the seed inlet (41) and being flared.

8. The seed-stopping mechanism for a seeder suitable for small seeds according to claim 6, characterized in that, The inner wheel body (2) has an installation port (23) on one side, and the mounting bracket (4) together with the seeding wheel (1) is embedded in the installation port (23).

9. The seed-stopping mechanism for a seeder suitable for small seeds according to claim 8, characterized in that, The inner wall of the mounting opening (23) has an abutment edge (231) along the circumferential direction. There are two opposing L-shaped limiting blocks (232) between the inner wall of the mounting opening (23) and the abutment edge (231) along the circumferential direction. There are two positioning ribs (432) on the outer circumferential wall of the plate body (43). The plate body (43) abuts against the abutment edge (231). The positioning ribs (432) abut against the limiting blocks (232) and are covered by the limiting blocks (232).

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