Double-variable regulating seed supply device for small and medium size seeds

Abstract

The application discloses a small and medium particle size compatible dual-variable regulating seed supply device suitable for high-speed operation, which comprises a seed supply device shell, an inlet is arranged at the upper end of the seed supply device shell, and an outlet is arranged at the lower end of the seed supply device shell; a speed reducer motor is installed on the outer wall of the seed supply device shell; a seed delivery shaft is rotatably connected to the inside of the seed supply device shell, and the output shaft of the speed reducer motor is in transmission connection with one end of the seed delivery shaft; a seed delivery groove wheel is fixed to the outside of the seed delivery shaft, and a plurality of seed delivery grooves are distributed on the outer wall of the seed delivery groove wheel; a length adjusting wheel is provided with a plurality of sliding protrusions on the inner wall of the central through hole, and the sliding protrusions are in sliding connection with the seed delivery grooves; a telescopic device is used for pushing the length adjusting wheel to move along the axial direction of the seed delivery groove wheel; and a seed layer adjusting plate is provided with a communication gap between the seed layer adjusting plate and the seed delivery groove wheel. The application can realize accurate seeding under high-speed operation and is suitable for different sizes of seeds.

Description

Technical Field

[0001] This invention relates to the field of seed supply device technology, and in particular to a dual-variable adjustable seed supply device suitable for both small and medium-sized particles in high-speed operations. Background Technology

[0002] Sowing is a crucial operational step in agricultural production, and its quality directly impacts crop yield. Precision sowing is an important measure to ensure stable, increased, and high crop yields. A key indicator of precision sowing is the seeding rate; an appropriate seeding rate facilitates the crop's efficient absorption of nutrients and sunlight, ensuring its growth needs are met. Therefore, precise variable-rate sowing is of great significance for promoting large-scale yield increases, ensuring agricultural product quality, and contributing to cost reduction and increased efficiency in agriculture. However, in actual operation, problems such as poor controllability of seeding rate, difficulty in meeting seeding requirements at different stages, insufficient seed supply at high speeds (6-12 km / h), and poor adaptability of seed metering devices to single crops severely limit further improvements in the sowing quality, operating speed, and machine utilization rate of direct seeding machines.

[0003] While existing pneumatic seed metering devices can adjust seeding rates within a certain range, their control factor is singular, relying solely on motor speed to change the seeding rate. This results in significant adjustment errors, poor controllability, and difficulty in meeting the stepless variable adjustment requirements of various agronomic stages. Regarding operating speed, current equipment operates at only 5-8 km / h. Furthermore, at high speeds, centrifugal force causes severe seed "flying," leading to a large discrepancy between the actual and target seeding rates, poor seed supply stability, and a prominent problem of insufficient seeding. This limits equipment operating speed, reduces operational efficiency, and impacts crop yield. To improve equipment utilization and reduce production costs, current seed metering devices can accommodate planting crops of the same particle size and type, but their adaptability to different particle sizes and types of crops is still relatively low. Moreover, adapting to different crop planting methods by changing the perforated wheel during actual operation is complex and difficult to install.

[0004] Therefore, there is an urgent need in this field for a dual-variable adjustable seed supply device suitable for both small and medium particle sizes and suitable for high-speed operation, in order to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a dual-variable adjustable seed supply device suitable for both small and medium-sized seeds in high-speed operations, so as to solve the problems existing in the prior art. It can realize quantitative sowing during high-speed operations, and the sowing amount can be adjusted without the problem of "flying seeds". It can also be used for sowing seeds of different sizes.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention discloses a dual-variable adjustable seed supply device suitable for both small and medium particle sizes, applicable to high-speed operations, comprising:

[0008] The seed supply device housing has a seed inlet at its upper end, which is used to connect with the seed discharge port of the seed box. The seed supply device housing has a seed outlet at its lower end. The seed supply device housing has a seed supply chamber and a seed discharge chamber inside. The seed supply chamber is connected to the seed inlet, and the seed discharge chamber is connected to the seed outlet.

[0009] A geared motor is mounted on the outer wall of the seed supply device housing;

[0010] A seed metering shaft is rotatably connected to the inside of the seed supply device housing, and the output shaft of the reduction motor is connected to one end of the seed metering shaft for transmission.

[0011] A seed metering wheel is fixed to the outside of the seed metering shaft, and a plurality of seed metering grooves are distributed circumferentially on the outer wall of the seed metering wheel;

[0012] The length adjusting wheel has multiple sliding protrusions distributed circumferentially on the inner wall of the central through hole, and the sliding protrusions are slidably connected to the seeding trough.

[0013] A telescopic device, which is used to push the length adjusting wheel to move along the axial direction of the seed metering trough wheel;

[0014] A seed layer adjusting plate is fixed inside the housing of the seed supply device. A communication gap is provided between the seed layer adjusting plate and the seed discharging groove wheel. The seed supply chamber and the seed discharging chamber are connected through the communication gap.

[0015] The control terminal is electrically connected to both the geared motor and the telescopic device.

[0016] Preferably, one end of the length adjusting wheel is provided with an adjusting wheel retaining ring, an adjusting wheel rolling bearing, and an adjusting wheel bearing end cap. The outer ring of the adjusting wheel rolling bearing is interference-fitted with the inner ring of the adjusting wheel retaining ring, and the inner ring of the adjusting wheel rolling bearing is interference-fitted with the outer wall of the length adjusting wheel. The adjusting wheel retaining ring and the adjusting wheel bearing end cap are fixed by adjusting wheel screws.

[0017] The adjusting wheel retaining ring has a fixing hole on the side near the telescopic device, and the telescopic end of the telescopic device is fixedly connected to the fixing hole.

[0018] Preferably, the outer wall of the length adjusting wheel is provided with a retaining ring groove, and a shaft elastic retaining ring is provided in the retaining ring groove, one side of the shaft elastic retaining ring abutting against the rolling bearing of the adjusting wheel.

[0019] Preferably, the telescopic device is an electric push rod.

[0020] Preferably, the telescopic device is fixed to the support base, and the support base is fixed to the inner bottom surface of the seed supply device housing.

[0021] Preferably, the two ends of the seed metering shaft are respectively connected to a first rolling bearing and a second rolling bearing. The first rolling bearing is disposed between a first bearing seat and a first bearing end cover, and the first bearing seat and the first bearing end cover are connected by a first screw. The second rolling bearing is disposed between a second bearing seat and a second bearing end cover, and the second bearing seat and the second bearing end cover are connected by a second screw. The first bearing seat and the second bearing seat are respectively fixed to both sides of the seed supply device housing.

[0022] Preferably, the seed metering shaft and the seed metering groove wheel are fixedly connected by fixing screws.

[0023] Preferably, one side of the seed supply device housing is provided with a seed unloading opening, and a seed unloading plate is slidably connected to the seed unloading opening.

[0024] Preferably, the geared motor is fixed to the motor end cover, and the motor end cover is fixed to the outer shell of the seed supply device.

[0025] Preferably, the control terminal includes a Raspberry Pi, and the Raspberry Pi has a protective casing on its outer side.

[0026] The present invention achieves the following technical effects compared to the prior art:

[0027] This invention allows for adjustment of the exposed length of the seed metering grooves on the seed metering wheel by controlling the extension and retraction of the telescopic device. This allows for adjustment of the number of seeds held in a single seed metering groove, thereby regulating the sowing rate. Furthermore, during high-speed operations, where a larger sowing rate is required, each seed metering groove can hold more seeds. Since the sowing weight is fixed, the speed of the reduction motor can be slowed down to prevent "sowing" problems. Moreover, by adjusting the exposed length of the seed metering grooves, it can accommodate seeds of different volumes. The working length of the seed metering grooves can be adjusted according to differences in seed size to accommodate small and medium-sized seeds, improving the crop adaptability of the seed supply device. The adjustment process requires no disassembly, making operation simple and quick.

[0028] As can be seen from the above, this invention has strong versatility in seeding types, high precision in unit seeding rate over large areas, and a wide range of seeding rate adjustment, realizing precision and variable seeding operations for small and medium-sized particles. It adopts a dual-variable adjustment method of "adjustment of the working length of the seed metering groove on the seed metering wheel + speed control of the reduction motor." Based on the established relationship model of seed metering machine speed - working length of the seed metering groove wheel hole - seeding rate, and combined with agronomic requirements and operating speed, the working length of the seed metering groove on the seed metering wheel and the speed of the reduction motor are adjusted in real time to solve the problem of seeding rate differences at various stages of agronomic processes.

[0029] Based on the above technologies, this invention achieves precise and variable-rate sowing operations under multiple requirements of agronomical conditions, operating speed, and crop type, providing technical support for promoting large-scale yield improvement initiatives. Furthermore, this invention features a compact, small, and easily disassembled overall structure with high integration. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the actual installation of the dual-variable adjustable seed supply device suitable for both small and medium particle sizes in Example 1, applicable to high-speed operations.

[0032] Figure 2 This is an exploded view of the dual-variable adjustable seed supply device suitable for both small and medium particle sizes in Example 1, applicable to high-speed operations.

[0033] Figure 3 This is an isometric view of the dual-variable adjustable seed supply device suitable for both small and medium particle sizes in Example 1, applicable to high-speed operations.

[0034] Figure 4 This is a front view of the dual-variable adjustable seed supply device suitable for both small and medium particle sizes, applicable to high-speed operations, as described in Example 1.

[0035] Figure 5 for Figure 4 Cross-sectional view;

[0036] Figure 6 This is a side sectional view of the dual variable adjustment seed supply device suitable for both small and medium particle sizes in Example 1, applicable to high-speed operations.

[0037] Figure 7 This is an isometric view of the seed metering groove wheel in the dual variable adjustable seed supply device suitable for both small and medium particle sizes in high-speed operation, as described in Example 1.

[0038] Figure 8 This is a front view of the seed discharging groove wheel in the dual variable adjustable seed supply device suitable for both small and medium particle sizes in the first embodiment, applicable to high-speed operation;

[0039] Figure 9 for Figure 8 AA section view in the middle;

[0040] Figure 10 for Figure 8 BB cross-section diagram in the middle;

[0041] Figure 11 for Figure 8 CC cross-section view in the middle;

[0042] Figure 12 for Figure 8 DD cross-section view in the middle;

[0043] Figure 13 This is a schematic diagram of the rotary tiller in Example 2;

[0044] Figure 14 Here is a flowchart illustrating the workflow of the precise broadcasting method in Example 3;

[0045] In the diagram: 1-Seed supply device housing; 2-Reduction motor; 3-Seed metering shaft; 4-Seed metering groove wheel; 5-Length adjusting wheel; 6-Electric push rod; 7-Seed layer adjusting plate; 8-Support base; 9-Seed unloading plate; 10-Seed supply device side plate; 11-Adjusting wheel retaining ring; 12-Adjusting wheel rolling bearing; 13-Adjusting wheel bearing end cover; 14-Shaft elastic retaining ring; 15-Motor end cover; 16-First bearing end cover; 17-First rolling bearing; 18-First bearing seat; 19-Second bearing seat; 20-Second rolling bearing; 21-Second bearing end cover; 22-Fixing screw; 23-Seed box; 24-Control terminal; 25-Seed guide tube; 26-Furrowing plow; 27-Furrow opener; 100-Dual variable adjustable seed supply device suitable for high-speed operation with small and medium particle sizes; 200-Rotary tiller. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] The purpose of this invention is to provide a dual-variable adjustable seed supply device suitable for both small and medium-sized seeds in high-speed operations, so as to solve the problems existing in the prior art. It can realize quantitative sowing during high-speed operations, and the sowing amount can be adjusted without the problem of "flying seeds". It can also be used for sowing seeds of different sizes.

[0048] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] Example 1

[0050] like Figures 1-12As shown, the present invention provides a dual-variable adjustable seed supply device 100 suitable for both small and medium particle sizes in high-speed operations, comprising:

[0051] The seed supply device housing 1 is a common shell structure designed to protect its internal components. The upper end of the housing has a seed inlet, which connects to the seed outlet of the seed box 23, allowing seeds from the seed box 23 to fall into the housing. The lower end of the housing has a seed outlet, from which a measured quantity of seeds is discharged. The housing contains a seed supply chamber and a seed outlet chamber. The seed supply chamber is adjacent to and connected to the seed inlet, and the seed outlet chamber is adjacent to and connected to the seed outlet.

[0052] The geared motor 2 can be an existing worm gear DC geared motor 2, and the main body of the geared motor 2 is installed on the outer wall of the seed supply device housing 1.

[0053] The seed metering shaft 3 is rotatably connected inside the seed supply device housing 1, and the output shaft of the geared motor 2 is drively connected to one end of the seed metering shaft 3. Specifically, the end of the seed metering shaft 3 near the geared motor 2 has a groove that matches the output shaft of the geared motor 2, allowing the output shaft of the geared motor 2 to be directly inserted into the groove. The two are interference-fitted, thus fixing the geared motor 2 and the seed metering shaft 3. When the output shaft of the geared motor 2 rotates, it drives the seed metering shaft 3 to rotate.

[0054] The seed metering wheel 4 is a cylindrical structure. The seed metering wheel 4 is fixed to the outside of the seed metering shaft 3. Multiple seed metering grooves are distributed circumferentially on the outer wall of the seed metering wheel 4, and the length direction of the seed metering grooves is parallel to the axial direction of the seed metering wheel 4.

[0055] The length adjusting wheel 5 is also a cylindrical structure, and its inner diameter matches the outer diameter of the seed metering groove wheel 4. Multiple sliding protrusions are circumferentially distributed on the inner wall of the central through hole of the length adjusting wheel 5. The number of sliding protrusions is the same as the number of seed metering grooves, and they correspond one-to-one. Each sliding protrusion can slide relative to its corresponding seed metering groove. When the sliding protrusion slides relative to the seed metering groove, the exposed working length of the seed metering groove changes accordingly.

[0056] The telescopic device is used to push the length adjusting wheel 5 to move along the axial direction of the seed metering trough wheel 4.

[0057] The seed layer adjusting plate 7 is fixed inside the seed supply device housing 1. Specifically, the two sides of the seed layer adjusting plate 7 are fixed to opposite sides of the inner wall of the seed supply device housing 1 by screws. Figure 6As shown, the seed layer adjusting plate 7 is typically inclined, and a communication gap is provided between the seed layer adjusting plate 7 and the seed dispensing groove wheel 4, through which the seed supply chamber and the seed dispensing chamber are connected. Furthermore, multiple angle adjustment holes can be provided on both sides of the seed supply device housing 1. By fixing the seed layer adjusting plate 7 to different adjustment holes with screws, the inclination angle of the seed layer adjusting plate 7 can be adjusted, thereby adjusting the size of the communication gap between the seed layer adjusting plate 7 and the seed dispensing groove wheel 4, ultimately adjusting the seeding rate.

[0058] The control terminal 24, the geared motor 2, and the telescopic device are all electrically connected to the control terminal 24. The speed of the geared motor 2 and the telescopic length of the telescopic device can be controlled through the control terminal 24.

[0059] In practical use, the speed of the reduction motor 2 and the extension length of the telescopic device are adjusted as needed to determine the working length of the seed metering trough, thereby determining how many seeds each seed metering trough can hold, i.e., the sowing quantity. Seeds from the seed box 23 first enter the seed supply chamber through the seed inlet. The reduction motor 2 drives the seed metering trough wheel 4 and the length adjusting wheel 5 to rotate synchronously via the seed metering shaft 3. A fixed amount of seeds enters the corresponding seed metering trough. Under the rotation of the seed metering trough wheel 4, the seeds enter the seed metering chamber and finally fall out from the seed outlet.

[0060] This embodiment adjusts the working length of the seed metering trough by controlling the extension length of the telescopic device. When the working length of the seed metering trough (i.e., the exposed length) increases, the control terminal 24 reduces the rotational speed of the seed metering shaft 3, thereby solving the "seed flying" problem caused by excessive rotational speed of the seed metering trough wheel 4 and ensuring accurate seeding. Simultaneously, the working length of the seed metering trough can be adjusted according to seed size differences to accommodate small and medium-sized seeds, improving the adaptability of this device to various crops. Furthermore, the adjustment process requires no disassembly, making operation simple and quick. In addition, the use of a geared motor 2 to directly drive the seed metering trough wheel 4 simplifies the transmission structure, eliminates the coupling, and avoids the problem of low seeding accuracy due to large coaxiality installation errors.

[0061] In this embodiment, as Figure 5 and Figure 11As shown, the end of the length adjusting wheel 5 furthest from the geared motor 2 has a stepped portion, and the end of the length adjusting wheel 5 furthest from the geared motor 2 has an adjusting wheel retaining ring 11, an adjusting wheel rolling bearing 12, and an adjusting wheel bearing end cover 13. The adjusting wheel retaining ring 11, the adjusting wheel rolling bearing 12, and the adjusting wheel bearing end cover 13 are located at the stepped portion. The outer ring of the adjusting wheel rolling bearing 12 is interference-fitted with the inner ring of the adjusting wheel retaining ring 11, and the inner ring of the adjusting wheel rolling bearing 12 is interference-fitted with the outer wall of the small-diameter end of the stepped portion on the length adjusting wheel 5, thereby fixing the adjusting wheel rolling bearing 12. The adjusting wheel rolling bearing 12 can use the existing 6006-2Zb rolling bearing. The adjusting wheel retaining ring 11 and the adjusting wheel bearing end cover 13 are fixed by adjusting wheel screws, thereby protecting the adjusting wheel rolling bearing 12.

[0062] from Figure 2 and Figure 7 As can be seen, the adjusting wheel retainer ring 11 has a fixing hole on the side near the telescopic device, and the telescopic end of the telescopic device is fixedly connected to the fixing hole. When the telescopic end of the telescopic device moves in telescopic motion, it can drive the adjusting wheel retainer ring 11, the adjusting wheel rolling bearing 12 and the adjusting wheel bearing end cover 13 to move synchronously, and finally drive the length adjusting wheel 5 to move reciprocally in a linear motion, thereby adjusting the working length of the seeding trough.

[0063] In this embodiment, the outer wall of the length adjusting wheel 5 is provided with a retaining ring groove, and a shaft elastic retaining ring 14 is provided in the retaining ring groove. The shaft elastic retaining ring 14 is located between the adjusting wheel retaining ring 11 and the adjusting wheel bearing end cover 13, and one side of the shaft elastic retaining ring 14 abuts against the adjusting wheel rolling bearing 12, thereby limiting the adjusting wheel rolling bearing 12.

[0064] In this embodiment, the telescopic device includes, but is not limited to, the existing electric push rod 6, and may also be a device with telescopic function such as a cylinder or hydraulic cylinder.

[0065] In this embodiment, the telescopic device is fixed on the support base 8, which is fixed to the inner bottom surface of the seed supply device housing 1 by screws. The upper surface of the support base 8 is provided with an arc-shaped contact surface that matches the side wall of the seed metering groove wheel 4, so that the seed metering groove wheel 4 can rotate on its upper surface.

[0066] In this embodiment, in order to achieve the rotatable connection of the seed metering shaft 3 to the seed supply device housing 1, as follows: Figure 5As shown, a first rolling bearing 17 and a second rolling bearing 20 are respectively connected to both ends of the seed metering shaft 3. Both the first rolling bearing 17 and the second rolling bearing 20 are existing 6002-2RZ rolling bearings, and their inner rings are interference-fitted with both ends of the seed metering shaft 3. The first rolling bearing 17 is disposed between the first bearing seat 18 and the first bearing end cover 16, which are connected by a first screw. The second rolling bearing 20 is disposed between the second bearing seat 19 and the second bearing end cover 21, which are connected by a second screw. The first bearing seat 18 and the second bearing seat 19 are respectively fixed to both sides of the seed supply device housing 1. Figure 2 As shown, the first bearing housing 18 is installed on the left side of the figure, that is, on the same side as the geared motor 2; while the second bearing housing 19 is fixed to the seed supply device side plate 10 by screws. The seed supply device side plate 10 is fixed to the right side of the seed supply device housing 1 by screws, and the seed supply device side plate 10 is provided with a through hole for the seed dispensing shaft 3 to pass through.

[0067] In this embodiment, the seed metering shaft 3 and the seed metering groove wheel 4 are fitted with a clearance. In order to fix the seed metering shaft 3 and the seed metering groove wheel 4, connection holes are provided at corresponding positions of the seed metering shaft 3 and the seed metering groove wheel 4. The seed metering shaft 3 and the seed metering groove wheel 4 are fixedly connected by fixing screws 22, that is, the fixing screws 22 are connected to the connection holes of the seed metering shaft 3 and the seed metering groove wheel 4 in sequence.

[0068] In this embodiment, as Figure 2 As shown, a seed discharge opening is provided on one side of the seed supply device housing 1, and a sliding groove is provided at the seed discharge opening. A seed discharge plate 9 is slidably connected to the sliding groove at the seed discharge opening. Figure 6 As shown, the seed unloading plate 9 is located on one side of the seed supply chamber. After the sowing work is completed, some seeds may still remain in the seed supply chamber. At this time, the seed unloading plate 9 can be opened to remove all the seeds in the seed supply chamber.

[0069] Furthermore, connecting holes can be provided at corresponding positions on the seed unloading plate 9 and the seed supply device housing 1, and then the two can be fixed together with screws. During operation, the screws on the seed unloading plate 9 can be tightened to prevent the seed unloading plate 9 from slipping out.

[0070] In this embodiment, as Figure 2 and Figure 5 As shown, the geared motor 2 is fixed on the motor end cover 15, and the motor end cover 15 is fixed on the seed supply device housing 1, thereby achieving the fixation of the geared motor 2.

[0071] In this embodiment, the control terminal 24 includes a Raspberry Pi and a power supply. The Raspberry Pi is provided with a protective shell, which is used to achieve technical effects such as circuit fixation, dust and water resistance. The power supply provides power to the Raspberry Pi, which is used to achieve precise control of the geared motor 2 and the electric push rod 6.

[0072] This embodiment has the following advantages:

[0073] 1. A dual-variable adjustment technology scheme of "adjustment of the working length of the seed metering trough + speed control of the geared motor 2" is adopted to establish a relationship model of the speed of the geared motor 2, the working length of the seed metering trough, and the seeding rate. A precise seeding rate control method is proposed, which has a wider range of seeding rate adjustment and solves the problem of agronomic seeding rate differences at different stages.

[0074] 2. This embodiment solves the problem of "flying seeds" caused by excessively high rotation speed of seed metering wheel 4 by increasing the effective working length of the seed metering trough and reducing the rotation speed of seed metering shaft 3. This ensures the accuracy of seeding and is suitable for high-speed (6-12km / h) operation, greatly improving the efficiency of machine operation.

[0075] 3. The seed metering wheel 4 can adjust the working length of the seed metering groove according to the difference in seed particle size, which is suitable for sowing small and medium-sized seeds. The adjustment process does not require disassembling the device, and the operation is simple. It is more convenient and faster than the existing method of changing crop type by changing the type of perforated wheel.

[0076] 4. The seed supply is provided by directly driving the seed metering wheel 4 with a geared motor 2, which simplifies the transmission structure, eliminates the coupling, and avoids the problem of low seeding accuracy caused by large coaxiality installation errors. The overall structure of the device is more compact, small and easy to disassemble.

[0077] 5. While the length adjusting wheel 5 moves laterally on the seed metering groove wheel 4, it can also rotate along the central axis of the seed metering shaft 3, which improves the device's self-adaptability and creates conditions for the device's intelligent operation.

[0078] Example 2

[0079] like Figure 13 As shown, the present invention provides a rotary tiller 200, which differs from the existing rotary tiller 200 in that it includes the dual variable adjustment seed supply device 100 for both small and medium particle sizes suitable for high-speed operation disclosed in Embodiment 1.

[0080] like Figure 13As shown, in Embodiment 1, the dual-variable variable seed supply device 100 suitable for high-speed operation and applicable to both small and medium particle sizes is located at the lower end of the seed box 23. The seed outlet of the dual-variable variable seed supply device 100 is connected to a distributor (essentially a nine-way connector) via a seed discharging pipe. A blower is installed on the seed discharging pipe to transport the seeds from the seed outlet of the dual-variable variable seed supply device 100 to the other eight ports of the nine-way connector. Each of the eight ports is then connected to a seed guide pipe 25 to discharge the seeds into the furrows below. Of course, the bottom of the rotary tiller 200 is also equipped with a furrowing plow 26 and a furrow opener 27, and the control terminal 24 is also installed on the rotary tiller 200. However, these are all prior art, so their specific structures will not be described further here.

[0081] Example 3

[0082] like Figure 14 As shown, this embodiment provides a method for precise seeding, based on the dual-variable adjustable seed supply device 100 suitable for high-speed operation and applicable to both small and medium particle sizes, disclosed in Embodiment 1.

[0083] Before sowing, a model relating the speed of the geared motor 2, the working length of the seed metering trough, and the seeding rate was tested and established. During the construction of the seeding rate model, a mathematical model was obtained by establishing the response surface of the speed of the geared motor 2, the working length of the seed metering trough, and the seeding rate through bench tests, and the model was imported into the control terminal 24. Based on the machine's operating speed and agronomic requirements, the speed of the geared motor 2 and the working length of the seed metering trough were adjusted in real time to complete the adaptive, precise, and variable seeding process. This solves three major problems: the differentiation of agronomic seeding rates at different stages, the instability of high-speed seeding, and the poor adaptability of the seed metering device to single crops. It achieves precise, variable sowing operations under multiple requirements of agronomic requirements, operating speed, and crop type, improving operational efficiency. Simultaneously, the device features a compact, small, and easily disassembled overall structure with high integration.

[0084] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A dual-variable regulating seed feeding device for both small and large seeds, which is suitable for high speed operation, characterized in that, The application relates to a seed supply device. The seed supply device comprises a seed supply device shell, a speed reducer, a seed discharge shaft, a seed discharge groove wheel, a length adjusting wheel, a telescopic device, a seed layer adjusting plate, a control terminal, a first rolling bearing and a second rolling bearing. The upper end of the seed supply device shell is provided with a seed inlet, the lower end of the seed supply device shell is provided with a seed outlet, the seed supply device shell is internally provided with a seed supply chamber and a seed discharge chamber, the seed supply chamber is communicated with the seed inlet, and the seed discharge chamber is communicated with the seed outlet. The speed reducer is installed on the outer wall of the seed supply device shell. The seed discharge shaft is rotationally connected to the inside of the seed supply device shell. The output shaft of the speed reducer is in transmission connection with one end of the seed discharge shaft. The seed discharge groove wheel is fixed to the outside of the seed discharge shaft. The outer wall of the length adjusting wheel is circumferentially provided with a plurality of sliding protrusions. The sliding protrusions are in sliding connection with the seed discharge grooves. The telescopic device is used for pushing the length adjusting wheel to move along the axial direction of the seed discharge groove wheel.

2. The dual-variable regulating seed feeding device for small and large seeds for high speed operation according to claim 1, wherein: The seed layer adjusting plate is fixed in the seed supply device shell.

3. The dual variable regulating seed feeding device for small and large seeds for high speed operation according to claim 1, wherein: The seed layer adjusting plate is provided with a communication gap between the seed discharge groove wheel.

4. The dual variable regulating seed feeding device for small and large seeds for high speed operation according to claim 1, wherein: The seed supply chamber and the seed discharge chamber are communicated through the communication gap.

5. The dual variable regulating seed feeding device for small and large seeds for high speed operation according to claim 1, wherein: The two sides of the seed supply device shell are provided with a plurality of angle adjusting holes.

6. The dual variable regulating seed feeding device for small and large seeds for high speed operation according to claim 1, wherein: The seed layer adjusting plate and the adjusting holes are fixedly connected through screws. The inclination angle of the seed layer adjusting plate can be adjusted. The size of the communication gap between the seed layer adjusting plate and the seed discharge groove wheel can be adjusted. The speed reducer and the telescopic device are electrically connected with the control terminal. One end of the length adjusting wheel is provided with an adjusting wheel stop ring, an adjusting wheel rolling bearing and an adjusting wheel bearing end cover. The outer ring of the adjusting wheel rolling bearing is in interference fit with the inner ring of the adjusting wheel stop ring. The inner ring of the adjusting wheel rolling bearing is in interference fit with the outer wall of the length adjusting wheel. The adjusting wheel stop ring and the adjusting wheel bearing end cover are fixed through an adjusting wheel screw. One side of the adjusting wheel stop ring close to the telescopic device is provided with a fixing hole. The telescopic end of the telescopic device is fixedly connected with the fixing hole. The outer wall of the length adjusting wheel is provided with a stop ring groove. An elastic stop ring for shaft is arranged in the stop ring groove. One side of the elastic stop ring for shaft is in abutment with the adjusting wheel rolling bearing. The telescopic device is an electric push rod. The telescopic device is fixed on a support seat. The support seat is fixed on the inner bottom surface of the seed supply device shell. The first rolling bearing and the second rolling bearing are respectively connected to the two ends of the seed discharge shaft. The first rolling bearing is arranged between a first bearing seat and a first bearing end cover. The first bearing seat and the first bearing end cover are connected through a first screw. The second rolling bearing is arranged between a second bearing seat and a second bearing end cover. The second bearing seat and the second bearing end cover are connected through a second screw. The first bearing seat and the second bearing seat are respectively fixed on the two sides of the seed supply device shell. The seed discharge shaft and the seed discharge groove wheel are fixedly connected through a fixing screw.

7. The dual variable regulating seed feeding device for small and large seeds for high speed operation according to claim 1, wherein: One side of the seed supply device shell is provided with a seed discharge opening, and a seed discharge plate is slidably connected to the seed discharge opening.

8. The dual variable regulating seed feeding device for small and large seeds for high speed operation according to claim 1, wherein: The speed reduction motor is fixed on a motor end cover, and the motor end cover is fixed on the seed supply device shell.

9. The dual variable regulating seed feeding device for small and large seeds for high speed operation according to claim 1, wherein: The control terminal comprises a Raspberry Pi, and a protective shell is arranged on the outer side of the Raspberry Pi.

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