An electric-driven double-linked seeding device

Abstract

An electric-driven double-linked seed-drilling device belongs to the field of agricultural machinery. The present invention includes a spacer, a left seed-drilling unit, a left seed-filling unit, a right seed-drilling unit and a right seed-filling unit; the left and right end faces of the spacer are both circular, and a circular negative pressure cavity is respectively provided on the left and right end faces of the spacer, and the left seed-drilling unit, the left seed-filling unit, the right seed-drilling unit and the right seed-filling unit are arranged in a mirror-symmetrical structure with the spacer as the center, and are respectively installed on the left and right sides of the spacer; a stepper motor and a negative pressure pipe hole connected to the negative pressure cavity of the spacer are provided on the top of the spacer. Compared with the prior art, the present invention adopts a technical solution of two sets of seed-drilling devices working in parallel, which can completely solve the bottleneck of operation speed caused by seed cleaning and seed changing links in the single seed-drilling device operation mode, and can greatly improve the operation efficiency and improve the operation quality. The present invention is suitable for the research and development and upgrading of special plot seeders for crop breeding such as corn and soybeans.

Description

Technical Field

[0001] The invention relates to a seed meter, in particular to an electric-driven double-link seed meter that can be applied to a plot seeder, and belongs to the field of agricultural machinery. Background Art

[0002] The plot seeder is a special agricultural machinery used in the breeding industry. Before the operation, the plot to be sown needs to be divided into multiple small plots of equal area (i.e., plots). The size of the plot depends on the variety of seeds to be sown and the actual breeding needs. Usually, the plot for sowing corn is 5 meters long and 65 cm wide, with a 1-meter-long interval between each plot. When the sowing operation in this plot is completed, when passing through the interval area, the remaining seeds in the seed meter (in order to ensure the seed filling effect, the number of seeds put in should be 10% more than the actual sowing amount) need to be cleared (i.e., the seed clearing process); then the seeds to be sown in the next plot enter the seed meter, and as the seed disc rotates, the seeds are sucked into the holes on the seed disc, thus entering the state of waiting to be sown (i.e., the seed changing process); when the machine moves to the next plot, sowing begins and the cycle repeats. At present, the seed meter of the plot seeder has the following three problems:

[0003] 1. Since the working state of the seed meter needs to be repeatedly switched between sowing, seed cleaning and seed changing, and the seed cleaning and seed changing process takes a long time (average time is about 2 seconds), and the seed cleaning and seed changing process can only be completed during the non-sowing operation period when the machine passes through the interval area (length 1 meter), it is difficult to increase the operating speed of the machine (usually around 1.5Km / h), which is very different from the operating speed of conventional seeders (8Km / h), which seriously restricts the sowing efficiency.

[0004] 2. Currently, most of the seed metering devices used in plot seeders adopt mechanical transmission drive mode, which has complex transmission mechanism, cumbersome plant spacing adjustment, difficult installation and debugging, inconvenient repair and maintenance, and requires high technical level of operators. Before use, a long period of special training is required.

[0005] 3. The seed meter usually adopts the principle of air suction seed cleaning. When the vacuum degree of the system is unstable, it is easy to have incomplete seed cleaning, which will lead to problems such as seed mixing between plots. Summary of the invention

[0006] The purpose of the present invention is to provide an electric-driven double-link seeding device to solve the problems of low operating efficiency, incomplete seed cleaning, inconvenient use and maintenance, and poor cost performance of the plot seeders currently widely used in the breeding industry.

[0007] The present invention is suitable for the research and development of new plot seeding machines and the upgrading and transformation of existing old models.

[0008] To achieve the above object, the technical solution adopted by the present invention is:

[0009] An electric-driven double seed-drilling device comprises a partition, a left seed-drilling unit, a left seed-filling unit, a right seed-drilling unit and a right seed-filling unit; the left and right end faces of the partition are both circular, and a circular negative pressure cavity is respectively provided at the left and right ends of the partition; the left seed-drilling unit, the left seed-filling unit, the right seed-drilling unit and the right seed-filling unit are arranged in a mirror-symmetrical structure with the partition as the center, and are respectively installed at the left and right ends of the partition, and the left seed-filling unit and the right seed-filling unit are respectively located on the outside of the left seed-drilling unit and the right seed-filling unit, and a negative pressure pipe hole connected to the negative pressure cavity of the partition is provided on the top of the partition.

[0010] Furthermore, the appearance of the separator in a side view is a 'V'-shaped structure that is wide at the top and narrow at the bottom.

[0011] Furthermore, the spacer is a cylindrical shape, and there is an angle of 8.4° between the left and right end faces of the spacer.

[0012] Furthermore, the left seeding unit has the same structure as the right seeding unit, and the left seeding unit includes a left seeding component, a left negative pressure component and a left driving component;

[0013] The left seeding assembly includes a thin-walled bearing, an outer ring pressure plate, a radial groove piece, a grinding piece, a driven gear ring and several seed separation pieces; the outer ring of the thin-walled bearing is embedded in the outer ring pressure plate, and the outer ring pressure plate is tightly connected to the spacer, so that the outer ring of the thin-walled bearing is clamped and fixed between the outer ring pressure plate and the spacer, and a strip hole is opened at the bottom of the outer ring pressure plate, and the seeds to be sown are discharged from it; the inner ring of the thin-walled bearing is clamped and fixed between the radial groove piece and the driven gear ring, and the grinding piece is arranged between the radial groove piece and the driven gear ring, and the grinding piece is fixed on the radial groove piece; the radial groove piece is provided with several radial grooves 1, each of the seed separation pieces is fixed on the radial groove piece and close to the outer edge, and a seed separation piece is arranged between each two adjacent radial grooves 1 of the radial groove piece; the grinding piece is provided with several radial grooves 2, and the several radial grooves 1 are arranged one-to-one with the several radial grooves 2;

[0014] The left negative pressure assembly includes a spiral groove, a groove bracket, a negative pressure pipe joint and three spring pieces; the spiral groove is fixed on one side end face of the groove bracket; the three spring pieces are evenly installed on the other side end face of the groove bracket and close to the outer edge; the spiral groove, the groove bracket and the spring piece are embedded in the negative pressure cavity at the left end of the spacer, and the outer side surface of the groove bracket fits the inner wall of the negative pressure cavity and can move back and forth slightly along the axis direction of the negative pressure cavity; the three spring pieces are in contact with the bottom of the negative pressure cavity; under the action of the spring piece, the spiral groove and the grinding plate of the left seed discharging assembly are always in close contact; the negative pressure pipe joint is installed on the negative pressure pipe hole at the top of the spacer;

[0015] The left-side driving assembly includes a stepper motor, a motor mounting plate and a driving bevel gear; the stepper motor is connected to the motor mounting plate, and the motor mounting plate is fixed on the top of the spacer. The output shaft of the stepper motor is connected to the driving bevel gear, and the driving bevel gear and the driven gear ring of the left-side seeding assembly form a pair of gear pairs.

[0016] Furthermore, the radial groove sheet is formed by a circular disk and a plurality of radial grooves evenly distributed along the circumferential direction on the circular disk; the material of the radial groove sheet is aluminum alloy.

[0017] Furthermore, the grinding disc is made of a circular disc and a plurality of radial grooves evenly distributed along the circumferential direction on the circular disc; the material of the grinding disc is tetrafluoroethylene.

[0018] Furthermore, the left seed filling unit has the same structure as the right seed filling unit, and the left seed filling unit includes a left seed feeding component and a left seed clearing component;

[0019] The left seed filling unit has the same structure as the right seed filling unit, and the left seed filling unit includes a left seed feeding component and a left seed cleaning component;

[0020] The left seed feeding assembly comprises a cover body, a circuit board, an elastic bracket, a motor bracket, a seed charging chamber, a seed charging chamber bottom plate, a vibration motor, a seed feeding tube and a waterproof connector; the cover body is fixed on the outer ring pressure plate of the left seed discharging assembly, and a seed suction hole is provided at the lower end of the cover body. The circuit board is fixed at the center position of the cover body, and the motor bracket is connected to the circuit board through an elastic bracket; the seed charging chamber is fixed on the motor bracket, and the seed charging chamber and the seed charging chamber bottom plate and the radial slots of the left seed discharging assembly constitute a closed space to accommodate the seeds to be sown; the vibration motor is installed on the upper part of the motor bracket; the seed feeding tube is inserted into the cover body, and the end of the seed feeding tube is communicated with the top opening of the seed charging chamber, so that the seeds to be sown enter the interior of the seed charging chamber; the waterproof connector is installed on the top of the cover body, and the waterproof connector is electrically connected to the circuit board;

[0021] The left seed clearing assembly includes a flipping motor, a driving gear, a driven sector gear and a rotating shaft; the flipping motor is fixed at the lower part of the motor bracket, and the driving gear is fixedly connected to the output shaft of the flipping motor; the driven sector gear and the driving gear form a pair of gear pairs; the driven sector gear is fixedly mounted on the rotating shaft, and the rotating shaft is fixedly connected to the bottom plate of the seed filling chamber of the left seed feeding assembly; when the flipping motor is activated, the bottom plate of the seed filling chamber flips accordingly.

[0022] The beneficial effects of the present invention relative to the prior art are:

[0023] 1. Due to the design structure of the double-linked seeding device, the left and right seeding units can work alternately, that is, when the left seeding unit is in the sowing state, the right seeding unit can perform seed clearing and seed changing actions; when the right seeding unit is in the sowing state, the left seeding unit can perform seed clearing and seed changing actions, and so on. Compared with the existing technology, the execution time limit of seed clearing and seed changing is increased to 7 times the original, so that the seed clearing and seed changing links are no longer a bottleneck affecting the operating speed of the machine, thereby greatly improving the operating speed; at the same time, since the execution time of seed clearing and seed changing actions is sufficient, the operation quality can also be better guaranteed.

[0024] 2. The drive of the seed meter is completed by a stepper motor, and the plant spacing adjustment can be accurately achieved by setting the speed of the stepper motor, which simplifies the mechanical structure, improves working reliability, and is conducive to the modularization of seeding components. It is easy to operate, reliable in performance, easy to maintain, and low in cost.

[0025] 3. The bottom plate of the seed filling chamber of the seeder adopts a reversible structure design. When the sowing operation of the current plot is completed, the bottom plate of the seed filling chamber moves, and the remaining seeds fall into the space between the bottom of the seed filling chamber and the shell of the seeder. Then the bottom plate of the seed filling chamber is reset, and the seeds to be sown in the next plot enter the seed filling chamber; even if some of the remaining seeds cannot be completely sucked away due to unstable system vacuum, since the seeds have been discharged out of the seed filling chamber, they will not be mixed with the seeds to be sown in the next plot that enter the seed filling chamber, thereby ensuring zero mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an appearance diagram of an electric-driven double-linked seed metering device of the present invention;

[0027] Figure 2 This is an exploded view of the overall structure of an electric-driven double-linked seed metering device of the present invention;

[0028] Figure 3 It is a structural diagram of the connection between the diaphragm, the stepper motor and the negative pressure pipe joint;

[0029] Figure 4 This is the structural exploded diagram of the seed dispensing component on the left;

[0030] Figure 5 This is the structural explosion diagram of the negative pressure component on the left;

[0031] Figure 6 This is the appearance diagram of the left side seeding assembly;

[0032] Figure 7 It is the internal structure diagram of the left side seeding component;

[0033] Figure 8 This is the structural diagram of the seed clearing component on the left;

[0034] Fig. 9 It is a structural diagram of the left-side drive assembly;

[0035] Fig.10 It is a cross-sectional structural diagram of the connection between the radial groove piece and the thin-walled bearing, grinding piece, driven gear ring and seeding piece;

[0036] Fig.11 It is a sectional view of the general assembly of an electric-driven double-linked seed metering device of the present invention.

[0037] The names of the components and the corresponding reference numerals in the above drawings are as follows:

[0038] 1-spacer; 2-left seeding unit; 21-left seeding assembly; 211-thin-wall bearing; 212-outer ring pressure plate; 213-radial groove; 214-grinding plate; 215-driven gear ring; 216-seed separation plate; 22-left negative pressure assembly; 221-spiral groove; 222-groove bracket; 223-spring; 224-negative pressure pipe joint; 23-left drive assembly; 231-stepping motor; 232-motor mounting plate; 233-driving bevel gear; 3-left filling Seed unit; 31-left seed inlet assembly; 310-seed suction hole; 311-cover body; 312-circuit board; 313-elastic bracket; 314-motor bracket; 315-seed filling chamber; 316-seed filling chamber bottom plate; 317-vibration motor; 318-seed inlet tube; 319-waterproof connector; 32-left seed cleaning assembly; 321-flip motor; 322-driving gear; 323-driven fan gear; 324-rotating shaft; 6-right seed discharge unit; 7-right seed filling unit. DETAILED DESCRIPTION

[0039] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0040] Specific implementation method 1: Figure 1-Figure 3 and Fig.11 As shown, this embodiment discloses an electric-driven double seed-drilling device, including a partition 1, a left seed-drilling unit 2, a left seed-filling unit 3, a right seed-drilling unit 6 and a right seed-filling unit 7; the left and right end faces of the partition 1 are both circular, and a circular negative pressure cavity is respectively provided at the left and right ends of the partition 1, and the left seed-drilling unit 2, the left seed-filling unit 3, the right seed-drilling unit 6 and the right seed-filling unit 7 are arranged in a mirror-symmetrical structure with the partition 1 as the center, and are respectively installed at the left and right ends of the partition 1, and the left seed-filling unit 3 and the right seed-filling unit 7 are respectively located on the outside of the left seed-drilling unit 2 and the right seed-filling unit 6, and a negative pressure pipe hole connected to the negative pressure cavity of the partition 1 is provided on the top of the partition 1 (the partition 1 is a cylindrical body, and the negative pressure pipe hole is arranged on the top of the cylindrical surface of the partition 1).

[0041] Specific implementation method 2: Figure 1-Figure 3As shown, this embodiment is a further description of the first embodiment. When viewed from the side, the separator 1 has a 'V'-shaped structure that is wide at the top and narrow at the bottom.

[0042] There are two reasons for adopting the 'V' type structural design: First, the top of the seeding device needs to be placed with the stepper motor 231, the motor mounting plate 232 and other parts, and the minimum width is 68mm; and the bottom of the seeding device is provided with two sets of seeding unit seeding ports, and the two seeding ports cannot be too far apart, otherwise it is difficult to ensure that the discharged seeds are in the same straight line. Second, the bottom of the seeding device is provided with a boot-type furrow opener, and the top opening width of the furrow opener must match the bottom of the seeding device. If the bottom width of the seeding device is too large, it will cause interference and cannot be assembled. Based on the above reasons, the 'V' type structural design must be adopted.

[0043] Specific implementation method three: Figure 2 , Figure 3 As shown, this embodiment is a further description of the specific embodiment one or two, the spacer 1 is a cylindrical body, and there is an angle of 8.4° between the left and right end faces of the spacer 1.

[0044] Specific implementation method four: Figure 1-Figure 5 , Figure 9-11 As shown, this embodiment is a further description of the specific embodiment 1. The left seeding unit 2 has the same structure as the right seeding unit 6. The left seeding unit 2 includes a left seeding component 21, a left negative pressure component 22 and a left driving component 23.

[0045] The left seeding assembly 21 includes a thin-walled bearing 211, an outer ring pressure plate 212, a radial groove piece 213, a grinding piece 214, a driven gear ring 215 and a plurality of seed separation pieces 216; the outer ring of the thin-walled bearing 211 is embedded in the outer ring pressure plate 212, and the outer ring pressure plate 212 is fastened to the spacer 1 (by a plurality of screws), and the outer ring of the thin-walled bearing 211 is clamped and fixed between the outer ring pressure plate 212 and the spacer 1, and a strip hole is opened at the bottom of the outer ring pressure plate 212, and the seeds to be sown are discharged from it; the inner ring of the thin-walled bearing 211 is clamped and fixed between the radial groove piece 213 and the driven gear ring 215 (by a plurality of screws). The grinding disc 214 is arranged between the radial groove piece 213 and the driven gear ring 215, and the grinding disc 214 is fixed on the radial groove piece 213; the radial groove piece 213 is provided with a plurality of radial grooves 1, each of the separating pieces 216 is fixed on the radial groove piece 213 and close to the outer edge (by two screws), and a separating piece 216 is arranged between each two adjacent radial grooves 1 of the radial groove piece 213 (the number of separating pieces 216 is the same as the number of radial grooves 1); the grinding disc 214 is provided with a plurality of radial grooves 2, and the plurality of radial grooves 1 are arranged one by one with the plurality of radial grooves 2;

[0046] The left negative pressure assembly 22 includes a spiral groove sheet 221, a groove sheet bracket 222, a negative pressure pipe joint 224 and three spring pieces 223; the spiral groove sheet 221 (i.e., a spiral groove is opened on the disc) is fixed on one side end surface of the groove sheet bracket 222; the three spring pieces 223 are evenly installed on the other side end surface of the groove sheet bracket 222 and close to the outer edge; the spiral groove sheet 221, the groove sheet bracket 222 and the spring pieces 223 are embedded in the negative pressure cavity at the left end of the diaphragm 1 The outer side of the groove bracket 222 is in contact with the inner wall of the negative pressure chamber, and can move back and forth slightly along the axial direction of the negative pressure chamber; three spring pieces 223 are in contact with the bottom of the negative pressure chamber; under the action of the spring pieces 223, the spiral groove piece 221 and the grinding piece 214 of the left seed discharging assembly 21 always maintain close contact (in order to ensure air tightness while the grinding piece 214 rotates); the negative pressure pipe joint 224 is installed on the negative pressure pipe hole at the top of the spacer 1;

[0047] The left driving assembly 23 includes a stepper motor 231, a motor mounting plate 232 and a driving bevel gear 233; the stepper motor 231 is connected to the motor mounting plate 232, and the motor mounting plate 232 is installed and fixed on the top of the spacer 1, and the output shaft of the stepper motor 231 is connected to the driving bevel gear 233, and the driving bevel gear 233 and the driven gear ring 215 of the left seed dispensing assembly 21 form a pair of gear pairs.

[0048] The stepper motor 231 is fixed on the top of the partition 1 with the help of the motor mounting plate 232. With the support of the thin-walled bearing 211, it drives the radial groove plate 213 and the grinding plate 214 in the left seeding assembly 21 through the bevel gear transmission pair. Compared with the commonly used central shaft transmission method, this design scheme can eliminate the transmission shaft and related transmission structures, greatly shortening the axial size of the seeding device.

[0049] The stepper motor 231 is used for direct drive, which can simplify the mechanical structure, improve the transmission efficiency, and make the operation of the seed metering device program-controlled and intelligent.

[0050] Specific implementation method five: Figure 4 As shown, this embodiment is a further description of the specific embodiment 4, and the radial groove piece 213 is made of a circular disk and a plurality of radial grooves evenly distributed along the circumferential direction of the circular disk; the material of the radial groove piece 213 is aluminum alloy.

[0051] Specific implementation method six: Figure 4 As shown, this embodiment is a further description of the specific embodiment four or five, and the grinding disc 214 is made of a circular disc and a plurality of radial grooves evenly distributed along the circumferential direction on the circular disc; the material of the grinding disc 214 is tetrafluoroethylene.

[0052] Except for the thickness, the external dimensions (outer diameter, radial groove opening size and position, number and distribution of radial grooves) of the radial groove plate 213 and the grinding plate 214 are exactly the same. The radial groove plate 213 is made of aluminum alloy with a thickness of 7 mm; the grinding plate 214 is made of tetrafluoroethylene (Teflon) with a thickness of 2 mm. In this way, while ensuring the rigidity of the structure (to meet the assembly requirements), the friction pair surface also has a certain flexibility, providing good sealing while ensuring the wear resistance.

[0053] Under the action of the external vacuum source, the inside of the negative pressure cavity of the diaphragm 1 is in a negative pressure state, so that the vicinity of the spiral groove on the spiral groove sheet 221 is also in a negative pressure state, while the vicinity of the radial groove 1 on the radial groove sheet 213 is at normal pressure; during the seeding process, the seeds located in the seed filling chamber 315 (described later) are adsorbed at the intersection of the radial groove 1 and the spiral groove under the action of atmospheric pressure (the spiral groove sheet 221 is fixed and the radial groove sheet 213 continues to rotate), and as the radial groove sheet 213 rotates, multiple seeds are adsorbed at multiple intersections of multiple radial grooves 1 and the spiral groove, thereby completing the seed filling process. Since the shape of the spiral groove is an involute, when the radial groove piece 213 rotates, each adsorbed seed slides from the center position to the edge position along the radial groove where it is located. When the radial groove piece 213 rotates to the top position of the seed metering device, the spiral groove on the spiral groove piece 221 ends. At this time, the negative pressure disappears. Under the action of gravity, the seeds fall into the packaging space formed by the radial groove piece 213, the two adjacent seed separation pieces 216 and the outer ring pressure plate 212, and are finally discharged through the strip holes at the bottom of the outer ring pressure plate 212, thereby completing the seeding process.

[0054] The width of the radial groove 1 on the radial groove piece 213 is related to the size of the seeds to be sown. Generally, the width of the radial groove 1 on the radial groove piece 213 suitable for soybeans is 4.2 mm, and the width of the radial groove 1 on the radial groove piece 213 suitable for corn is 5.5 mm.

[0055] Specific implementation method seven: Figure 1 , Figure 2 , Figure 4 , Figure 6-Figure 8 and Fig.11 As shown, this embodiment is a further description of the specific embodiment 4. The left seed filling unit 3 has the same structure as the right seed filling unit 7. The left seed filling unit 3 includes a left seed feeding component 31 and a left seed cleaning component 32.

[0056] The left seed feeding assembly 31 includes a cover body 311, a circuit board 312, an elastic bracket 313, a motor bracket 314, a seed charging chamber 315, a seed charging chamber bottom plate 316, a vibration motor 317, a seed feeding tube 318 and a waterproof connector 319 (an external purchase part); the cover body 311 is fixed on the outer ring pressure plate 212 of the left seed discharging assembly 21, and a seed suction hole 310 is provided at the lower end of the cover body 311. The circuit board 312 is fixed at the center position of the cover body 311 (by a plurality of screws), and the motor bracket 314 is connected to the circuit board 312 through the elastic bracket 313; The seed filling chamber 315 is fixed on the motor bracket 314, and the seed filling chamber 315, the seed filling chamber bottom plate 316 and the radial slot 213 of the left seed discharging assembly 21 form a closed space to accommodate the seeds to be sown; the vibration motor 317 is installed on the upper part of the motor bracket 314; the seed inlet pipe 318 is inserted into the cover body 311, and the end of the seed inlet pipe 318 is connected to the top opening of the seed filling chamber 315, so that the seeds to be sown enter the seed filling chamber 315; the waterproof connector 319 is installed on the top of the cover body 311, and the waterproof connector 319 is electrically connected to the circuit board 312;

[0057] The left seed cleaning component 32 includes a flip motor 321, a driving gear 322, a driven fan gear 323 and a rotating shaft 324; the flip motor 321 is fixed to the lower part of the motor bracket 314, and the driving gear 322 is fixedly connected to the output shaft of the flip motor 321; the driven fan gear 323 and the driving gear 322 form a pair of gear pairs; the driven fan gear 323 is fixedly mounted on the rotating shaft 324, and the rotating shaft 324 is fixedly connected to the seed filling chamber bottom plate 316 of the left seed feeding component 31; when the flip motor 321 is activated, the seed filling chamber bottom plate 316 flips accordingly.

[0058] In order to ensure the seed filling effect and prevent missed seeding, the number of seeds entering the seed filling chamber 315 should be about 10% more than the actual number required for sowing. After the sowing operation of the plot is completed, the remaining seeds need to be removed to avoid mixing with the seeds of the next plot.

[0059] This solution controls the seed filling chamber bottom plate 316 to flip through the flip motor 321 and the corresponding mechanism, and discharges the remaining seeds out of the seed filling chamber 315 to prevent them from being mixed with the seeds to be sown in the next plot that will enter the seed filling chamber 315.

[0060] Conventional seed cleaning schemes all directly use negative pressure to suck out, which may result in incomplete seed cleaning. However, this scheme adopts a physical isolation method, that is, after the remaining seeds are discharged from the seed filling chamber 315, they are accumulated in the space formed by the radial grooves 213, the outer ring pressure plate 212 and the cover body 311, and are sucked out of the seed meter through the seed suction hole 310 at the lower end of the cover body 311 under the action of the external vacuum source. Even if the seed cleaning is incomplete due to vacuum pressure fluctuations or pipeline leakage, it will not affect the "zero mixing" requirement of the seeds in the seed filling chamber 315.

[0061] Working principle:

[0062] When sowing begins, the external negative pressure source is connected to the negative pressure pipe joint 224, and the air flows into the negative pressure cavity of the spacer 1 through the radial groove 1 of the radial groove piece 213, the radial groove 2 of the grinding piece 214 and the spiral groove on the spiral groove piece 221, and is finally discharged through the negative pressure pipe joint 224; under the action of the spring piece 223, the spiral groove piece 221 installed on the groove piece bracket 222 fits tightly with the radial groove piece 213, and can maintain a high air tightness. Therefore, under the action of atmospheric pressure, one or more seeds are adsorbed on one or more intersections of one or more radial grooves 1 on the radial groove piece 213 and the spiral grooves on the spiral groove piece 221. At the same time, the vibration motor 317 starts to work, causing the motor bracket 314 to jump up and down slightly. Since the seed filling chamber 315 is rigidly connected to the motor bracket 314, the seeds contained in the seed filling chamber 315 also jump up and down accordingly. Since the seeds are in a weightless state during the falling process, the interaction force between the seeds is greatly weakened at this time, which significantly increases the possibility of the seeds being negatively pressured and adsorbed on the radial groove 1 of the radial groove sheet 213, thereby improving the seed filling efficiency and preventing the occurrence of missed sowing. At the same time, the stepper motor 231 installed on the spacer 1 through the motor mounting plate 232 starts to rotate, driving the driving bevel gear 233 to rotate. Since the driving bevel gear 233 and the driven gear ring 215 are a pair of gear pairs, the driven gear ring 215 drives the radial slot piece 213 to start rotating; the seeds adsorbed on each radial slot 1 of the radial slot piece 213 will move along the spiral groove on the spiral slot piece 221, and also slide along the radial slot 1 where they are located, gradually moving from the center position of the spiral slot piece 221 to the outer circle; when the seeds move to the end of the spiral groove, the negative pressure disappears at this time, and the seeds fall into the closed space formed by the outer ring pressure plate 212 and the two seed separation pieces 216 under the action of gravity; as the radial slot piece 213 rotates, it passes through the strip hole at the bottom of the outer ring pressure plate 212 and falls to the ground, completing the seeding process.

[0063] When the sowing operation in this plot is completed, the seed cleaning process begins immediately: the vacuum source connected to the outside is cut off, and the seeds adsorbed on the radial groove 213 fall into the space between the radial groove 213, the outer ring pressure plate 212 and the cover body 311; at the same time, the flip motor 321 drives the seed filling chamber bottom plate 316 to flip, and the remaining seeds in the seed filling chamber 315 fall into the space formed by the radial groove 213, the outer ring pressure plate 212 and the cover body 311; a seed suction hole 310 is provided at the lower end of the cover body 311. When the external vacuum source is connected, the seeds are driven by the airflow and are discharged out of the seed metering device, completing the seed cleaning process.

[0064] The working principle of the right seeding unit 6 and the right seed filling unit 7 is exactly the same as that of the left seeding unit 2 and the left seed filling unit 3. At the beginning of the sowing operation, the left seeding unit 2 and the left seed filling unit 3 and the right seeding unit 6 and the right seed filling unit 7 successively enter the standby sowing state, and the left seeding unit 2 and the left seed filling unit 3 start the sowing operation first. When the sowing operation of the current plot is completed, the left seeding unit 2 and the left seed filling unit 3 enter the seed clearing and seed changing operation link. When the machine enters the next plot, the right seeding unit 6 and the right seed filling unit 7 that have entered the standby sowing state start the sowing operation. At this time, the seed clearing and seed changing operations of the left seeding unit 2 and the left seed filling unit 3 can still be carried out simultaneously until they enter the standby sowing state; after the sowing operation of the next plot is completed, the right seeding unit 6 and the right seed filling unit 7 enter the seed clearing and seed changing operation link, and so on and so forth until the sowing operation is completed.

[0065] The circuit board 312 is equipped with a controller, and the stepper motor 231 is electrically connected to the circuit board 312 through the waterproof connector 319. Through program control, the speed of the stepper motor 231 can be adjusted at any time according to the needs of the sowing operation and the current travel speed of the machine, thereby achieving accurate adjustment of the plant spacing.

[0066] The present invention adopts a technical solution of juxtaposing two sets of seeding components driven by a stepper motor 231. The two sets of seeding components work in parallel, that is, the sowing operation of the current plot and the seed clearing and seed changing operations of the previous plot are respectively performed simultaneously by the two sets of seeding components and alternately cycle back and forth, which can eliminate the influence of the speed bottleneck existing in the seed clearing and seed changing links of the existing single seeding device on the operating efficiency of the machine; at the same time, the bottom plate 316 of the seed filling chamber of the seeding device adopts a flip structure, and the remaining seeds can be completely removed to avoid seed mixing.

[0067] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent replacement and improvement made to the above embodiments without departing from the content of the technical solution of the present invention, based on the technical essence of the present invention, within the spirit and principles of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims

1. An electric-driven double-linked seeding device, characterized in that: It comprises a spacer (1), a left seed-discharging unit (2), a left seed-filling unit (3), a right seed-discharging unit (6) and a right seed-filling unit (7); the left and right end surfaces of the spacer (1) are both circular, and a circular negative pressure cavity is provided at the left and right ends of the spacer (1); the left seed-discharging unit (2), the left seed-filling unit (3), the right seed-discharging unit (6) and the right seed-filling unit (7) are arranged in a mirror-symmetrical structure with the spacer (1) as the center, and are respectively installed at the left and right ends of the spacer (1); the left seed-filling unit (3) and the right seed-filling unit (7) are respectively located on the outside of the left seed-discharging unit (2) and the right seed-filling unit (6); a negative pressure pipe hole connected to the negative pressure cavity of the spacer (1) is provided at the top of the spacer (1); when viewed from the side, the spacer (1) has a 'V'-shaped structure that is wide at the top and narrow at the bottom; The left seeding unit (2) has the same structure as the right seeding unit (6), and the left seeding unit (2) comprises a left seeding component (21), a left negative pressure component (22) and a left driving component (23); The left seeding assembly (21) comprises a thin-walled bearing (211), an outer ring pressure plate (212), a radial groove plate (213), a grinding plate (214), a driven gear ring (215) and a plurality of seed separation plates (216); the outer ring of the thin-walled bearing (211) is embedded in the outer ring pressure plate (212), the outer ring pressure plate (212) is tightly connected to the spacer (1), and the outer ring of the thin-walled bearing (211) is clamped and fixed between the outer ring pressure plate (212) and the spacer (1); a strip hole is opened at the bottom of the outer ring pressure plate (212), and the seeds to be sown are discharged therefrom; the inner ring of the thin-walled bearing (211) is clamped and fixed in The grinding plate (214) is arranged between the radial groove plate (213) and the driven gear ring (215), and the grinding plate (214) is fixed on the radial groove plate (213); a plurality of radial grooves 1 are arranged on the radial groove plate (213), each of the seed separation plates (216) is fixed on the radial groove plate (213) and close to the outer edge, and a seed separation plate (216) is arranged between each two adjacent radial grooves 1 of the radial groove plate (213); a plurality of radial grooves 2 are arranged on the grinding plate (214), and the plurality of radial grooves 1 and the plurality of radial grooves 2 are arranged one-to-one; The left negative pressure assembly (22) comprises a spiral groove sheet (221), a groove sheet bracket (222), a negative pressure pipe joint (224) and three spring sheets (223); the spiral groove sheet (221) is fixed on one end surface of the groove sheet bracket (222); the three spring sheets (223) are evenly installed on the other end surface of the groove sheet bracket (222) and close to the outer edge; the spiral groove sheet (221), the groove sheet bracket (222) and the spring sheets (223) are embedded in the spacer. (1) in the negative pressure chamber at the left end, and the outer side surface of the groove plate bracket (222) is in contact with the inner wall of the negative pressure chamber and can be reciprocated slightly along the axial direction of the negative pressure chamber; three spring plates (223) are in contact with the bottom of the negative pressure chamber; under the action of the spring plates (223), the spiral groove plate (221) and the grinding plate (214) of the left seed discharging assembly (21) are always in close contact; the negative pressure pipe joint (224) is installed on the negative pressure pipe hole at the top of the spacer (1); The left-side driving assembly (23) comprises a stepper motor (231), a motor mounting plate (232) and a driving bevel gear (233); the stepper motor (231) is connected to the motor mounting plate (232), the motor mounting plate (232) is fixedly mounted on the top of the spacer (1), the output shaft of the stepper motor (231) is connected to the driving bevel gear (233), and the driving bevel gear (233) and the driven gear ring (215) of the left-side seed dispensing assembly (21) form a pair of gear pairs.

2. The electric-driven double-linked seed-drying device according to claim 1, characterized in that: The spacer (1) is a cylindrical shape, and there is an angle of 8.4° between the left and right end faces of the spacer (1).

3. The electric-driven double-linked seed-drying device according to claim 1, characterized in that: The radial groove piece (213) is made of a circular disk and a plurality of radial grooves evenly distributed along the circumferential direction on the circular disk; the material of the radial groove piece (213) is aluminum alloy.

4. An electrically driven double seed metering device according to claim 1 or 3, characterized in that: The grinding disc (214) is made of a circular disc and a plurality of radial grooves evenly distributed along the circumferential direction on the circular disc; the material of the grinding disc (214) is tetrafluoroethylene.

5. The electric-driven double-linked seed-drilling device according to claim 1, characterized in that: The left seed filling unit (3) has the same structure as the right seed filling unit (7), and the left seed filling unit (3) comprises a left seed feeding component (31) and a left seed clearing component (32); The left seed feeding assembly (31) comprises a cover (311), a circuit board (312), an elastic bracket (313), a motor bracket (314), a seed charging chamber (315), a seed charging chamber bottom plate (316), a vibration motor (317), a seed feeding tube (318) and a waterproof connector (319); the cover (311) is fixed on the outer ring pressure plate (212) of the left seed discharging assembly (21); a seed suction hole (310) is provided at the lower end of the cover (311); the circuit board (312) is fixed at the center position of the cover (311); the motor bracket (314) is connected to the circuit board (312) through the elastic bracket (313); the seed charging chamber (315) is fixed on the outer ring pressure plate (212) of the left seed discharging assembly (21); (315) is fixed on the motor bracket (314), the seed filling chamber (315) and the seed filling chamber bottom plate (316) and the radial slot (213) of the left seed discharging assembly (21) form a closed space to accommodate the seeds to be sown; the vibration motor (317) is installed on the upper part of the motor bracket (314); the seed inlet tube (318) is inserted into the cover body (311), and the end of the seed inlet tube (318) is connected to the top opening of the seed filling chamber (315), so that the seeds to be sown enter the seed filling chamber (315); the waterproof connector (319) is installed on the top of the cover body (311), and the waterproof connector (319) is electrically connected to the circuit board (312); The left seed clearing assembly (32) comprises a flipping motor (321), a driving gear (322), a driven sector gear (323) and a rotating shaft (324); the flipping motor (321) is fixed to the lower part of the motor bracket (314), and the driving gear (322) is fixedly connected to the output shaft of the flipping motor (321); the driven sector gear (323) and the driving gear (322) form a pair of gear pairs; the driven sector gear (323) is fixedly mounted on the rotating shaft (324), and the rotating shaft (324) is fixedly connected to the seed filling chamber bottom plate (316) of the left seed feeding assembly (31); when the flipping motor (321) is in motion, the seed filling chamber bottom plate (316) flips accordingly.

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