Peanut seed metering device

Abstract

The utility model relates to the field of seeder machinery, in particular to a peanut seed metering device, which is characterized in that a seed metering wheel is arranged in a seed metering box, a seed inlet is arranged on one side of the seed metering box, which is positioned on the seed metering wheel, a vertical seed baffle is arranged on the other side of the seed metering box, which is positioned on the seed metering wheel, and an elastic layer is arranged on the end surface of the vertical seed baffle, which faces the seed metering wheel; the vertical seed blocking plate comprises a mounting seat and a supporting plate, the mounting seat is connected with the inner wall of the seed metering box, the supporting plate is arranged on the mounting seat, the elastic layer is detachably connected with the supporting plate, a seed blocking gap is formed between the elastic layer and the seed metering wheel, and the seed metering box is provided with a seed outlet below the seed blocking gap. More than two seed metering holes and more than one annular seed shifting groove are formed in the circumferential surface of the seed metering wheel, the annular seed shifting groove penetrates through the seed metering holes, an inclined seed shifting rod is arranged in the seed metering box, and the inclined seed shifting rod obliquely and upwards extends into the annular seed shifting groove from the lower part of the seed metering wheel. According to the peanut seed metering device, accurate, synchronous and low-loss seed metering can be realized, the hole grain number qualification rate of an existing seeding machine is improved, the hole distance qualification rate is ensured, the seed damage rate is reduced, and the requirements on the seeding performance and the use effect of the seeding machine are met.

Description

Technical Field

[0001] The utility model relates to the field of seeding machine machinery, in particular to a peanut seed metering device. Background Art

[0002] The current peanut cultivation agronomy in China usually requires that the number of seeds per hole during sowing is 2, and there are strict regulations on three sowing performances: the qualified rate of double-seed number, the qualified rate of hole spacing, and the seed breakage rate. Most of the existing peanut seeders are mechanical peanut seeders. When used in the hilly and mountainous areas of southern China, since most of the peanuts planted are pearl bean type varieties, the sizes and lengths of the seeds vary greatly and are easily damaged. For example, the device with the application number CN202022300563.6 and the name of a peanut seed metering device with forced seed pushing will have the following problems when in use: (1) The accuracy of the two seeds discharged each time is insufficient, reducing the qualified rate of double-seed number of the seeder; (2) The synchronism of the two seeds discharged is insufficient, resulting in a relatively large distance between the two seeds in each hole after the seeder sows, reducing the qualified rate of hole spacing of the seeder; (3) There are more cases of seed breakage in the discharged seeds, increasing the seed breakage rate of the seeder. The above problems affect the sowing performance and use effect of the seeder and are not conducive to the healthy growth of seeds. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is: to provide a double-seed peanut seed metering device, which improves the accuracy and synchronism of the seed metering operation and reduces the seed breakage rate.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is:

[0005] A peanut seed metering device includes a seed metering box. A seed metering wheel is arranged in the seed metering box. There is a seed inlet on one side of the seed metering box where the seed metering wheel is located. There is a vertical seed retaining plate on the other side of the seed metering box where the seed metering wheel is located. An elastic layer is arranged on the end face of the vertical seed retaining plate facing the seed metering wheel. The vertical seed retaining plate includes a mounting seat and a support plate. The mounting seat is connected to the inner wall of the seed metering box. The support plate is arranged on the mounting seat. The elastic layer is detachably connected to the support plate. There is a seed retaining gap between the elastic layer and the seed metering wheel. There is a seed outlet below the seed retaining gap in the seed metering box. The circumferential surface of the seed metering wheel is provided with more than two seed metering cavities and more than one annular seed pushing groove. The annular seed pushing groove penetrates through the seed metering cavities. An inclined seed pushing rod is arranged in the seed metering box. The inclined seed pushing rod extends obliquely upward from below the seed metering wheel into the annular seed pushing groove.

[0006] Further, the elastic layer is adhesively connected to the support plate.

[0007] Further, a strip-shaped locking groove is arranged on the inner wall of the seed metering box. The mounting seat is slidably connected to the strip-shaped locking groove and locked by a fastener.

[0008] Furthermore, the strip-shaped lock groove is an arc-shaped groove. One end of the mounting seat is hinged to the inner wall of the seed metering box, and the other end of the mounting seat slides along the arc-shaped groove.

[0009] Furthermore, a seed scraping wheel is provided above the seed metering wheel in the seed metering box. There is a seed scraping gap between the seed scraping wheel and the seed metering wheel. The seed scraping wheel and the seed metering wheel rotate in the same direction. The ratio range of the surface linear velocity of the seed scraping wheel to the surface linear velocity of the seed metering wheel is 1.3 to 1.8.

[0010] Furthermore, the seed scraping wheel is located above the seed metering wheel on the side close to the seed inlet. The offset vertical angle range between the seed scraping wheel and the seed metering wheel is 10° to 15°.

[0011] Furthermore, a seat plate is provided on the side of the seed metering box close to the seed inlet of the seed scraping wheel. An anti-displacement plate and a baffle are provided on the seat plate. There is an anti-displacement gap between the anti-displacement plate and the seed scraping wheel. A seed guiding plate is provided on one side of the seed metering box where the seed metering wheel is located. The baffle and the seed guiding plate enclose to form a seed inlet channel.

[0012] Furthermore, both the seed scraping wheel and the seat plate are detachably connected to the inner wall of the seed metering box.

[0013] The beneficial effects of the present utility model are as follows: For a peanut seed metering device, during operation, as the seed metering wheel rotates, peanut seeds fall onto the seed metering wheel from the seed inlet under the action of their own gravity and are conveyed along with it. A vertical seed retaining plate is installed on one side of the route where the seed metering wheel conveys the seeds. The gap between the seed metering wheel and the seed retaining plate (seed retaining gap) changes in the pattern of "large - small - large". After the seeds enter the seed retaining gap from the upper end of the seed retaining plate and slide out of the seed metering holes on the seed metering wheel, a part of their volume is blocked by the seed retaining plate. Inside the relatively "large" overall space jointly formed by the seed retaining gap and the hole space, the seeds automatically adjust their moving balance or sub - balance state according to the principle of object stability, and cross the narrowest part of the seed retaining gap at the smallest point with a stable moving posture and then enter the gradually increasing seed retaining gap space. Seeds with different shapes and sizes in different seed metering holes at the same position on the circumference of the seed metering wheel will further adjust their moving postures and wait for each other in this "small - large" area. After ensuring that they all cross their rest angles, they are immediately discharged synchronously in a vertical or nearly vertical direction at the lower end of the seed retaining plate and directly fall into the seed dropping port. Therefore, after the seeds pass through the seed retaining action of the vertical seed retaining plate with a "large - small - large" changing gap, they automatically adjust their moving postures, wait until they cross their rest angles, and then are immediately discharged synchronously in a vertical or nearly vertical direction at the lower end of the seed retaining plate and directly fall into the seed dropping port. The contact time of the seeds with the "small" gap of the seed retaining plate is extremely short, the seed retaining force is small, and the stroke is short, effectively solving the problem of asynchronous and inaccurate seed metering caused by different shapes and sizes of seeds. Furthermore, it solves the problem that the asynchronous seed metering misdivides the two seeds in one hole into two holes, affecting the double - seed number qualification rate, and at the same time avoids the increase in the seed breakage rate due to a long seed retaining time. At the same time, the vertical seed retaining plate is provided with an elastic layer. When the seeds pass through the seed retaining gap between the elastic layer and the seed metering wheel, they press against the elastic layer. Since the elastic layer can elastically deform, it further reduces the seed breakage rate caused by seed retaining. The peanut seed metering device of the present utility model can achieve accurate, synchronous, and low - loss seed metering, improve the hole - grain number qualification rate of the existing seeder, ensure the hole - spacing qualification rate, reduce the seed breakage rate, meet the requirements for the seeding performance and use effect of the seeder, and the overall structure design is simple and compact, and the components are convenient to disassemble and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the peanut seed metering device;

[0015] Figure 2 is a sectional view of the seed metering wheel;

[0016] Figure 3 is a top view of the seed metering wheel;

[0017] Figure 4 is a schematic structural diagram of the inclined seed pushing rod;

[0018] Reference numeral description:

[0019] 1. Seed metering box; 11. Seed inlet; 12. Seed outlet; 13. Strip-shaped locking groove; 14. Seed guiding plate; 15. Seed inlet channel; 2. Seed metering wheel; 21. Seed metering holes; 22. Annular seed pushing groove; 3. Vertical seed retaining plate; 31. Elastic layer; 32. Mounting seat; 33. Support plate; 4. Inclined seed pushing rod; 5. Seed scraping wheel; 6. Base plate; 61. Anti-displacement plate; 62. Baffle plate; 7. Seed outlet hopper. Detailed implementation mode

[0020] To describe the technical content, achieved objectives and effects of the present utility model in detail, the following is described in conjunction with the implementation modes and with reference to the accompanying drawings.

[0021] The present utility model provides a peanut seed metering device for peanut sowing operations.

[0022] Please refer to Figures 1 to 4 As shown, a peanut seed metering device of the present utility model includes a seed metering box 1. A seed metering wheel 2 is provided in the seed metering box 1. A seed inlet 11 is provided on one side of the seed metering box 1 where the seed metering wheel 2 is located. A vertical seed retaining plate 3 is provided on the other side of the seed metering box 1 where the seed metering wheel 2 is located. An elastic layer 31 is provided on the end face of the vertical seed retaining plate 3 facing the seed metering wheel 2. There is a seed retaining gap between the elastic layer 31 and the seed metering wheel 2. A seed outlet 12 is provided below the seed retaining gap in the seed metering box 1.

[0023] As can be seen from the above description, the beneficial effects of the present utility model are as follows: a peanut metering device, during operation, as the metering wheel rotates, peanut seeds fall onto the metering wheel from the seed inlet under the action of their own gravity and are conveyed along with it. A vertical seed baffle is installed on one side of the route where the metering wheel conveys the seeds. The gap between the metering wheel and the baffle (seed baffle gap) changes in the pattern of "large - small - large". After the seeds enter the seed baffle gap from the upper end of the baffle, part of their volume is blocked by the baffle as they slide out of the seed metering holes on the metering wheel. Inside the relatively "large" overall space jointly formed by the seed baffle gap and the hole space, the seeds automatically adjust their motion balance or sub - balance state according to the principle of object stability, and cross the narrowest part of the seed baffle gap in a stable motion posture and then enter the gradually increasing seed baffle gap space. Seeds with different shapes and sizes in different seed metering holes at the same position on the circumference of the metering wheel will further adjust their motion postures and wait for each other in this "small - large" area. After ensuring that they all cross their rest angles, they are immediately discharged synchronously in a vertical or nearly vertical direction at the lower end of the baffle and directly fall into the seed dropping port. Therefore, after the seeds pass through the blocking action of the vertical seed baffle with a "large - small - large" changing gap, they automatically adjust their motion postures, wait until they cross their rest angles, and then are immediately discharged synchronously in a vertical or nearly vertical direction at the lower end of the baffle and directly fall into the seed dropping port. The contact time of the seeds with the "small" gap of the baffle is extremely short, the blocking force is small, and the stroke is short, effectively solving the problem that seeds are out of sync and inaccurate in metering due to different shapes and sizes, and further solving the problem that the double - seed number qualification rate is affected because the two seeds in one hole are divided into two holes due to out - of - sync metering, and at the same time avoiding an increase in the seed breakage rate due to a long blocking time; at the same time, the vertical seed baffle is provided with an elastic layer. When the seeds pass through the seed baffle gap between the elastic layer and the metering wheel, they press against the elastic layer. Since the elastic layer can elastically deform, it further reduces the seed breakage rate caused by blocking. The peanut metering device of the present utility model can achieve accurate, synchronous, and low - loss metering, improve the hole - grain number qualification rate of the existing seeder, ensure the hole - spacing qualification rate, reduce the seed breakage rate, meet the requirements for the seeding performance and use effect of the seeder, and the overall structural design is simple and compact, and the components are convenient to disassemble and assemble.

[0024] In an alternative embodiment, the vertical seed baffle 3 includes a mounting base 32 and a support plate 33. The mounting base 32 is connected to the inner wall of the seed metering box 1, the support plate 33 is arranged on the mounting base 32, and the elastic layer 31 is detachably connected to the support plate 33.

[0025] As can be seen from the above description, the mounting base 32 is set at a suitable position on the seed metering box 1 according to the peanut particle size and the parameters of the metering wheel 2. The support plate 33 of the mounting base 32 is used to mount the elastic layer 31. The elastic layer 31 is convenient for disassembly and assembly, so it can be quickly replaced to ensure synchronous discharge of seeds and reduce the seed breakage rate. The material, thickness, etc. of the elastic layer 31 can be flexibly selected according to needs.

[0026] In an alternative embodiment, the elastic layer 31 is adhesively connected to the support plate 33.

[0027] As can be seen from the above description, the elastic layer 31 is installed on the support plate 33 by gluing, which improves the disassembly and assembly convenience while ensuring the stability of the connection structure.

[0028] In an alternative embodiment, a strip-shaped locking groove 13 is provided on the inner wall of the seed metering box 1, and the mounting seat 32 is slidably connected to the strip-shaped locking groove 13 and locked by a fastener.

[0029] As can be seen from the above description, the purpose of providing the strip-shaped locking groove 13 is to facilitate the sliding of the mounting seat 32 thereon, so as to adjust the size of the seed blocking gap.

[0030] In an alternative embodiment, the strip-shaped locking groove 13 is an arc-shaped groove, one end of the mounting seat 32 is hinged to the inner wall of the seed metering box 1, and the other end of the mounting seat 32 slides along the arc-shaped groove.

[0031] As can be seen from the above description, the mounting seat 32 rotates around the hinge point at one end, and the other end slides in the arc-shaped groove, so as to flexibly set the distance between the elastic layer 31 and the seed metering wheel 2 according to the peanut particle size.

[0032] In an alternative embodiment, the circumferential surface of the seed metering wheel 2 is provided with more than two seed metering cavities 21 and more than one annular seed pushing groove 22. The annular seed pushing groove 22 penetrates through the seed metering cavities 21. An inclined seed pushing rod 4 is provided in the seed metering box 1, and the inclined seed pushing rod 4 extends obliquely upward from below the seed metering wheel into the annular seed pushing groove 22.

[0033] As can be seen from the above description, the seed metering cavities 21 are used to hold seeds. The annular seed pushing groove 22 communicates with the seed metering cavities 21. The seed pushing rod is inclined. The seed pushing rod is inserted obliquely upward from the side of the seed metering wheel 2 into the annular seed pushing groove 22, so as to push down the seeds stuck in the seed metering cavities 21, and can make the pushed seeds move toward the seed discharging side of the seed metering wheel 2, ensuring the synchronization of the double-seed metering operation and the accuracy of the number of seeds per hole.

[0034] In an alternative embodiment, a seed scraping wheel 5 is provided above the seed metering wheel 2 in the seed metering box 1. There is a seed scraping gap between the seed scraping wheel 5 and the seed metering wheel 2. The seed scraping wheel 5 rotates in the same direction as the seed metering wheel 2. The ratio range of the surface linear velocity of the seed scraping wheel 5 to the surface linear velocity of the seed metering wheel 2 is 1.3 to 1.8.

[0035] As can be seen from the above description, through experiments, it is measured that when the seed scraping wheel 5 rotates in the same direction as the seed metering wheel 2 with a linear velocity greater than that of the seed metering wheel 2, and the surface linear velocities of the seed scraping wheel 5 and the seed metering wheel 2 are within the above ratio range, it has a seed scraping effect from top to bottom, with good seed scraping effect, will not cause extra seeds to be conveyed with the seed metering wheel 2, and will not cause seed damage, ensuring the synchronization of the double-seed metering operation and the accuracy of the number of seeds per hole, and reducing the seed breakage rate.

[0036] In an optional embodiment, the scraping wheel 5 is located above the seeding wheel 2 and close to the seed inlet 11, and the offset vertical angle between the scraping wheel 5 and the seeding wheel 2 is in the range of 10° to 15°.

[0037] From the above description, it can be known that, through experimental measurement, when the angle of the seed scraping wheel 5 offset with respect to the seed wheel 2 is within the above range, the seeding effect can be improved, and the seed scraping effect is the best.

[0038] In an optional embodiment, the seed box 1 is provided with a seat plate 6 on the side of the seed scraper wheel 5 close to the seed inlet 11, and the seat plate 6 is provided with an anti-slip plate 61 and a baffle plate 62, and an anti-slip gap is provided between the anti-slip plate 61 and the seed scraper wheel 5. The seed box 1 is provided with a seed guide plate 14 on the side of the seed wheel 2, and the baffle plate 62 and the seed guide plate 14 enclose a seed inlet channel 15.

[0039] From the above description, it can be known that an anti-slip assembly is added inside the seed box 1, and the baffle plate 62 arranged on the seat plate 6 is combined with the seed guide plate 14 to form a seed entry channel 15, which helps to guide the seeds from the seed entry port 11 to fall into the seed pocket 21. The anti-slip plate 61 arranged on the seat plate 6 can prevent the seeds from being driven to the seeding side of the seed wheel 2 when the scraper wheel 5 rotates, which has a significant effect on improving the seeding performance such as the accuracy of the number of seeds in the holes, the synchronization of seeding, and the seed breakage rate.

[0040] In an optional embodiment, the seed scraping wheel 5 and the seat plate 6 are both detachably connected to the inner wall of the seed box 1 .

[0041] From the above description, it can be seen that the installation positions of the scraper wheel 5 and the seat plate 6 can be flexibly adjusted according to actual needs such as peanut particle size, component size specifications, etc.

[0042] Please refer to Figures 1 to 4 As shown, the first embodiment of the utility model is: a peanut seeding device, including a seeding box 1, a seeding wheel 2 is arranged in the seeding box 1, a seed inlet 11 is arranged on one side of the seeding wheel 2, a vertical seed blocking plate 3 is arranged on the other side of the seeding wheel 2, an elastic layer 31 is arranged on the end surface of the vertical seed blocking plate 3 facing the seeding wheel 2, the elastic layer 31 is made of silicone material, and a seed blocking gap is provided between the elastic layer 31 and the seeding wheel 2, and the minimum seed blocking gap is 1 / 3 to 2 / 3 of the diameter of peanuts, a seed outlet 12 is arranged below the seed blocking gap in the seeding box 1, a seed outlet 7 is connected below the seed outlet 12, and the seed outlet 7 gradually shrinks from top to bottom, and the seeds gradually gather after falling into the seed outlet 7 from the seed outlet 12, which helps to improve the synchronization of sowing seeds and thus improve the qualified rate of sowing hole distance.

[0043] The vertical seed baffle 3 includes a mounting base 32 and a support plate 33. The mounting base 32 is connected to the inner wall of the seed metering box 1, the support plate 33 is arranged on the mounting base 32, and the elastic layer 31 is detachably connected to the support plate 33. The elastic layer 31 is adhesively connected to the support plate 33. A strip-shaped locking groove 13 is provided on the inner wall of the seed metering box 1, and the mounting base 32 is slidably connected to the strip-shaped locking groove 13 and locked by a fastener. The strip-shaped locking groove 13 is an arc-shaped groove, one end of the mounting base 32 is hinged to the inner wall of the seed metering box 1, and the other end of the mounting base 32 slides along the arc-shaped groove.

[0044] The circumferential surface of the seed metering wheel 2 is provided with more than two seed metering cavities 21 and more than one annular seed pushing groove 22. The seed metering cavities 21 are arranged along the generatrix of the seed metering wheel 2, the annular seed pushing groove 22 is arranged along the circumferential direction of the seed metering wheel 2, the depth of the annular seed pushing groove 22 is greater than the depth of the seed metering cavity 21, the annular seed pushing groove 22 penetrates through the seed metering cavity 21, and an inclined seed pushing rod 4 is arranged in the seed metering box 1. The inclined seed pushing rod 4 extends obliquely upward from below the seed metering wheel into the annular seed pushing groove 22. The depth of the seed metering cavity 21 gradually increases along the rotation direction of the seed metering wheel 2. The outer contours of the bottom end and the top end of the seed metering cavity 21 are provided with transition fillets. In this design, the depths of the two bottom corners of the seed metering cavity 21 are different when viewed from the cross section, and the internal and external corners of the seed metering cavity 21 are both provided with transition fillets, which is beneficial to scraping off redundant seeds and ensuring the accurate number of seeds per hole. Such a design enables the seed metering cavity 21 to be pre-filled with seeds in advance, which helps to ensure the effectiveness of seed filling. Due to the pre-filling of the seed metering cavity 21 with seeds, on the premise of ensuring the appropriate seed filling angle of the seed metering cavity 21, the subsequent seed scraping wheel 5 is used to scrape the seeds from top to bottom. In this way, the seed scraping effect is good, and the seed scraping force can also be reduced, thereby reducing seed breakage.

[0045] The metering box 1 is provided with a seed scraping wheel 5 above the metering wheel 2. The seed scraping wheel 5 rotates in the same direction as the metering wheel 2. There is a seed scraping gap between the seed scraping wheel 5 and the metering wheel 2, and the seed scraping gap is 1 / 3 - 1 / 2 of the diameter of the peanut seeds. The seed scraping wheel 5 rotates in the same direction as the metering wheel 2, and the ratio range of the surface linear velocity of the seed scraping wheel 5 to the surface linear velocity of the metering wheel 2 is 1.3 - 1.8. The seed scraping wheel 5 is located above the metering wheel 2 on the side close to the seed inlet 11, and the offset vertical included angle range between the seed scraping wheel 5 and the metering wheel 2 is 10° - 15°. The metering box 1 is provided with a seat plate 6 on the side of the seed scraping wheel 5 close to the seed inlet 11. The seat plate 6 is of an L-shaped structure, and an anti-displacement plate 61 and a baffle 62 are provided on the seat plate 6. There is an anti-displacement gap between the anti-displacement plate 61 and the seed scraping wheel 5, and the anti-displacement gap is 1 / 3 - 2 / 3 of the peanut diameter. The metering box 1 is provided with a seed guiding plate 14 on one side of the metering wheel 2. The baffle 62 and the seed guiding plate 14 enclose to form a seed inlet channel 15. The seed guiding plate 14 is arranged closely on the side of the horizontal center plane of the metering wheel 2 close to the seed inlet 11 at a horizontal inclination angle greater than the angle of repose of the peanut seeds, which is beneficial for the seeds to enter the metering cavities 21 in a lying manner, improving the seed filling effect of the metering cavities 21, and thus improving the accuracy of the number of seeds per hole in the metering cavities 21. The horizontal included angle B of the seed guiding plate 14 is 35° - 45°; the seed guiding effect of the seed guiding plate 14 is good, and the seed filling effect of the metering cavities 21 is relatively good. The upper end of the seed guiding plate 14 is hinged to the metering box 1, and the lower end of the seed guiding plate 14 is fixedly connected to the metering box 1 by bolts. When it is necessary to recycle the seeds in the seed filling area and above it, the seed guiding plate 14 can be opened for seed recycling. A partition is provided at the upper end of the seed guiding plate 14, which is beneficial for the seeds to enter and fall onto the seed guiding plate 14, and is beneficial for the seed filling of the metering cavities 21. Both the seed scraping wheel 5 and the seat plate 6 are detachably connected to the inner wall of the metering box 1.

[0046] During operation, as the metering wheel 2 rotates, the peanut seeds fall into the seed filling area from the seed inlet 11 above the seed filling area, and then fall into the metering cavities 21 under the action of their own gravity and the seed guiding action of the seed guiding plate 14. After the excess seeds are scraped off by the seed scraping wheel 5, they pass through the seed blocking action of the vertical seed blocking plate 3 made of elastic material and then fall into the seeding tube (seed dropping tube) of the seeder through the seed outlet 12 and the seed outlet hopper 7 in sequence and are discharged.

[0047] In summary, for the peanut metering device of the present utility model, during operation, as the metering wheel rotates, peanut seeds fall onto the metering wheel from the seed inlet under the action of their own gravity and are conveyed along with it. A vertical seed retaining plate is installed on one side of the route where the metering wheel conveys the seeds. The gap between the metering wheel and the seed retaining plate (seed retaining gap) changes in the pattern of "large - small - large". After the seeds enter the seed retaining gap from the upper end of the seed retaining plate, part of their volume is blocked by the seed retaining plate as they slide out from the seed metering holes on the metering wheel. Based on the principle of object stability, the seeds automatically adjust their balance or sub - balance state of motion within the relatively "large" overall space jointly formed by the seed retaining gap and the hole space. They cross the narrowest part of the seed retaining gap in a stable motion posture and then enter the gradually widening seed retaining gap space. Seeds of different shapes and sizes in different seed metering holes at the same position on the circumference of the metering wheel will further adjust their motion postures and wait for each other in this "small - large" area. After ensuring that they all cross their rest angles, they are immediately discharged synchronously in a vertical or nearly vertical direction from the lower end of the seed retaining plate and directly fall into the seed dropping port. Therefore, after the seeds pass through the seed retaining action of the vertical seed retaining plate with a "large - small - large" changing gap, they automatically adjust their motion postures, wait until they cross their rest angles, and then are immediately discharged synchronously in a vertical or nearly vertical direction from the lower end of the seed retaining plate and directly fall into the seed dropping port. The contact time of the seeds with the "small" gap of the seed retaining plate is extremely short, the seed retaining force is small, and the stroke is short, effectively solving the problem of asynchronous and inaccurate metering caused by different shapes and sizes of seeds. Furthermore, it solves the problem that the asynchronous metering misdivides the two seeds in one hole into two holes, affecting the double - seed rate qualification rate, and at the same time avoids the increase in the seed breakage rate due to a long seed retaining time. At the same time, the vertical seed retaining plate is provided with an elastic layer. When the seeds pass through the seed retaining gap between the elastic layer and the metering wheel, they press against the elastic layer. Since the elastic layer can elastically deform, it further reduces the seed breakage rate caused by seed retaining. The peanut metering device of the present utility model can achieve accurate, synchronous, and low - loss metering, improve the qualification rate of the number of seeds per hole of the existing seeder, ensure the qualification rate of the hole spacing, reduce the seed breakage rate, meet the requirements for the seeding performance and use effect of the seeder, and the overall structural design is simple and compact, and the disassembly and assembly of components are convenient.

[0048] The above description is only an embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent transformation made by using the content of the specification and drawings of the present utility model, directly or indirectly applied in the relevant technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A peanut metering device, comprising a metering box, a metering wheel is arranged in the metering box, a seed inlet is arranged on one side of the metering box where the metering wheel is located, and it is characterized in that, The seed metering box is provided with a vertical seed baffle on the other side of the seed metering wheel. An elastic layer is provided on the end face of the vertical seed baffle facing the seed metering wheel. The vertical seed baffle includes a mounting seat and a support plate. The mounting seat is connected to the inner wall of the seed metering box, the support plate is arranged on the mounting seat, and the elastic layer is detachably connected to the support plate. There is a seed blocking gap between the elastic layer and the seed metering wheel. The seed metering box is provided with a seed outlet below the seed blocking gap. The circumferential surface of the seed metering wheel is provided with more than two seed metering cavities and more than one annular seed pushing groove. The annular seed pushing groove penetrates the seed metering cavities. An inclined seed pushing rod is arranged in the seed metering box, and the inclined seed pushing rod obliquely extends upward from below the seed metering wheel into the annular seed pushing groove.

2. The peanut metering device according to claim 1, wherein The elastic layer is adhesively connected to the support plate.

3. The peanut seed metering device according to claim 1, characterized in that, A strip-shaped locking groove is provided on the inner wall of the seed metering box. The mounting seat is slidably connected to the strip-shaped locking groove and locked by a fastener.

4. The peanut metering device according to claim 3, characterized in that, The strip-shaped locking groove is an arc-shaped groove. One end of the mounting seat is hinged to the inner wall of the seed metering box, and the other end of the mounting seat slides along the arc-shaped groove.

5. The peanut metering device according to claim 1, characterized in that, The seed metering box is provided with a seed scraping wheel above the seed metering wheel. There is a seed scraping gap between the seed scraping wheel and the seed metering wheel. The seed scraping wheel rotates in the same direction as the seed metering wheel. The ratio range of the surface linear velocity of the seed scraping wheel to the surface linear velocity of the seed metering wheel is 1.3 - 1.

8.

6. The peanut metering device according to claim 5, wherein The seed scraping wheel is located above the seed metering wheel and on the side close to the seed inlet. The offset vertical included angle range between the seed scraping wheel and the seed metering wheel is 10° - 15°.

7. The peanut metering device according to claim 5, wherein, The seed metering box is provided with a seat plate on the side of the seed scraping wheel close to the seed inlet. An anti-displacement plate and a baffle are provided on the seat plate. There is an anti-displacement gap between the anti-displacement plate and the seed scraping wheel. The seed metering box is provided with a seed guiding plate on one side of the seed metering wheel. The baffle and the seed guiding plate enclose to form a seed inlet channel.

8. The peanut seed metering device according to claim 7, characterized in that Both the seed scraping wheel and the seat plate are detachably connected to the inner wall of the seed metering box.

Images