Electric control type direct-insertion precision dibbler

Abstract

The utility model discloses an electric control type direct-insertion precision dibbler and relates to the field of seeding devices. Comprising a parallel four-bar mechanism, a dibbler main frame, a seed tube and a duckbilled mechanism, a seed metering cavity is formed in the dibbler main frame, a seed metering module is arranged in the seed metering cavity, the seed metering module comprises a seed metering shaft and a stepping motor, and the stepping motor can receive a signal of the control module and drive the seed metering shaft to rotate; the side wall of the seed tube is connected with the connecting rod through a buckle and can synchronously move along with the connecting rod; the bottom of the seed pipe is fixedly connected with the top of the dibbler main frame and is communicated with the seed discharging cavity, so that corn seeds can be conveyed into the seed discharging cavity; the duckbilled mechanism is arranged at the bottom of the dibbler main frame and communicated with the opening in the bottom of the seed discharging cavity, the duckbilled mechanism comprises an electric push rod, and the electric push rod can receive a signal of the control module and drive the bottom of the duckbilled mechanism to be opened or closed. The seeding process is electrically controlled, the operation is simple, and the precision seeding can be realized.

Description

Technical Field

[0001] This utility model relates to the field of seeding device technology, and in particular to an electrically controlled direct-insertion precision seeder. Background Technology

[0002] One known method of corn cultivation is double-ridge planting with full plastic film covering, which involves sowing using a vertically inserted seeder in double furrows covered with plastic film. The inventors' research on the known vertically inserted seeder has primarily focused on the design and optimization of its mechanical structure. The sowing process is controlled entirely by mechanical means; however, due to the relatively precise nature of the mechanical structure, it has stringent requirements for soil flatness and other external conditions, resulting in less than ideal actual sowing results. Utility Model Content

[0003] The purpose of this invention is to provide an electrically controlled direct-insertion precision seeder to solve the problems existing in the prior art. The seeding process is electrically controlled, simple to operate, and can achieve precision seeding.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides an electrically controlled direct-insertion precision seeding device, comprising:

[0006] A parallel four-bar linkage includes a driving crank, a driven crank, a connecting rod, and vertically arranged bearing seats. The bearing seats are fixed to a seeding machine. A rotating shaft that is connected to the drive mechanism of the seeding machine passes through the bearing seats. One end of the driving crank is fixedly connected to the upper rotating shaft, and the other end is hinged to one end of the connecting rod. One end of the driven crank is fixedly connected to the lower rotating shaft, and the other end is hinged to the other end of the connecting rod. A photoelectric rotary encoder is installed on the rotating shaft at the upper end of the parallel four-bar linkage. The photoelectric rotary encoder can sense the inner angular displacement of the rotating shaft and transmit pulse signals to the control module.

[0007] The main frame of the seeder has a seed metering chamber inside, and a seed metering module is provided inside the seed metering chamber. The seed metering module includes a seed metering shaft and a stepper motor. The stepper motor can receive signals from the control module and drive the seed metering shaft to rotate.

[0008] The seed tube has its sidewall connected to the connecting rod via a snap-fit ​​and can move synchronously with the connecting rod; the bottom of the seed tube is fixedly connected to the top of the main frame of the seeder and communicates with the seed dispensing chamber, enabling it to deliver corn seeds into the seed dispensing chamber;

[0009] The duckbill mechanism is located at the bottom of the main frame of the seeder and communicates with the bottom opening of the seeding chamber. The duckbill mechanism includes an electric actuator that can receive signals from the control module and drive the bottom of the duckbill mechanism to open or close.

[0010] Preferably, the seed metering module further includes a seed brush and a barb block. The seed brush is mounted on the main frame of the seeder and is located on one side of the seed metering shaft. The end of the seed brush has a bevel, and the bevel end is connected to the surface of the seed metering shaft. The seed metering shaft is rotatably engaged with the main frame of the seeder. The seed metering shaft is provided with a seed metering groove and a seed unloading groove, and the seed unloading groove is connected to the rear end of the seed metering groove. The seed metering groove and the seed unloading groove can pass through the bevel end of the seed brush in sequence. The barb block is located between the inner bottom of the seed tube and the seed metering shaft. The inner side of the barb block is provided with a smooth arc surface, which can guide the seeds in the seed metering cavity to the seed metering groove. The bottom end of the barb block is made of flexible material, and an arched hole is opened at the bottom of the barb block. The stepper motor is fixedly mounted on the main frame of the seeder, and one end of the seed metering shaft is connected to the output shaft of the stepper motor.

[0011] Preferably, the seeding module further includes a Hall proximity switch and a strong magnetic sheet. One end of the seeding shaft is connected to the output shaft of a stepper motor, and the other end is fixedly connected to a boss. The side wall of the boss is provided with a groove, and the strong magnetic sheet is provided in the groove. The Hall proximity switch is fixed on the main frame of the seeder. In the initial state, the strong magnetic sheet is parallel to the sensing surface of the Hall proximity switch.

[0012] Preferably, linear bearings are provided on both sides of the main frame of the seeder, and guide rods are movably inserted through the linear bearings. A seeder limiting base is fixedly connected to the bottom of the guide rod, and an extension rod is connected to the top of the guide rod. A return spring is fixedly connected between the extension rod and the bottom plate of the main frame of the seeder. The bottom of the bottom plate of the main frame of the seeder is provided with the duckbill mechanism, and a through hole is opened on the seeder limiting base for the duckbill mechanism to pass through. The duckbill mechanism includes a fixed duckbill, a movable duckbill, and a torsion spring for keeping the movable duckbill engaged with the fixed duckbill.

[0013] Preferably, the electric push rod is fixedly mounted on the main frame of the seeder, and a push block is fixedly connected to the telescopic shaft at the bottom of the electric push rod. A fixing rod is provided on one side of the push block. A lever is hinged to the movable duckbill, and a strip groove is provided at the end of the lever away from the movable duckbill. The fixing rod is rotatably connected to the strip groove, and the fixing rod can slide within the strip groove.

[0014] Preferably, a photoelectric sensor is provided inside the duckbill mechanism, and the photoelectric sensor is used to monitor the corn seeds passing through the duckbill mechanism.

[0015] Preferably, a side pipe is provided on one side of the upper part of the seed tube, a servo motor is installed on the top of the seed tube, and the output end of the servo motor is connected to a coaxial straight shaft through a coupling. The straight shaft is located inside the seed tube, and a conveying blade is fixedly connected to the outer circumference of the straight shaft. The conveying blade is used to convey corn seeds inside the seed tube.

[0016] Preferably, the seed metering trough is funnel-shaped, and the size of the seed metering trough matches the size of a single seed or two seeds. The depth of the seed unloading trough is less than the depth of the seed metering trough, and the depth of the connecting portion between the seed unloading trough and the seed metering trough is greater than the depth of both the seed metering trough and the seed unloading trough.

[0017] Preferably, the control module includes a signal conversion circuit, a control unit, an LED display screen, a power supply circuit, a stepper motor drive module circuit, and an electric actuator drive module circuit; the signal conversion circuit, the LED display screen, the power supply circuit, the stepper motor drive module circuit, and the electric actuator drive module circuit are all connected to the control unit;

[0018] The signal conversion circuit is used to convert the pulse signal to obtain the converted pulse signal;

[0019] The control circuit is used to output a switch signal according to the converted pulse signal, and output it to the stepper motor drive module circuit or the electric actuator drive module circuit; the switch signal is a turn-out command, a turn-back command, a push-out command, or a pull-back command;

[0020] The stepper motor drive module circuit is used to drive the stepper motor to rotate according to the turn-out command or the turn-back command;

[0021] The electric actuator drive module circuit is used to drive the electric actuator to extend or retract according to the extend command or the retract command;

[0022] The LED display screen is used to show the current rotation angle of the connecting rod.

[0023] Preferably, it also includes a communication module; the photoelectric rotary encoder is connected to the control module through the communication module.

[0024] The present invention achieves the following technical advantages over the prior art:

[0025] This invention monitors the rotation of the parallel four-bar linkage, enabling the control system to grasp the angle information of the seeder at every moment in real time. Based on the position information of the parallel four-bar linkage, the real-time position of the seeder's main frame is determined, thereby controlling the seeding module to seed at the appropriate time and the duckbill mechanism to open and close at the right time, effectively achieving the requirements of low loss and high precision seeding. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0029] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0030] Figure 4 This is a cross-sectional view of the present invention;

[0031] Figure 5 This is a partial structural diagram of the present invention. Figure 1 ;

[0032] Figure 6 This is a partial structural diagram of the present invention. Figure 2 ;

[0033] Figure 7 This is a schematic diagram of the servo motor transmission structure of this utility model;

[0034] Figure 8 This is a schematic diagram of the overall structure of the fixed duckbill of this utility model;

[0035] Figure 9 This is a schematic diagram of the STM32 microcontroller chip circuit of this utility model;

[0036] Figure 10 This is a schematic diagram of the step-down power supply circuit for the STM32 microcontroller of this utility model;

[0037] Figure 11 This is a circuit diagram of the 485 communication module of this utility model;

[0038] Figure 12 This is a schematic diagram of the stepper motor drive module circuit of this utility model;

[0039] Figure 13 This is a schematic diagram of the electric actuator drive module of this utility model;

[0040] Figure 14This is a schematic diagram of the Hall effect detection module for seeding shaft return according to this utility model;

[0041] The components include: 1. Seed tube; 111. Side tube; 112. Servo motor; 113. Straight shaft; 114. Conveyor blade; 2. Seeder main frame; 3. Stepper motor; 4. Guide rod; 5. Linear bearing; 6. Seeder limit base; 7. Movable duckbill; 8. Fixed duckbill; 81. Photoelectric sensor; 9. Push block; 10. Electric push rod; 11. Return spring; 12. Hall effect proximity switch; 13. Fixed rod; 14. Seed metering shaft; 15. Strong magnetic sheet; 16. Seed brush; 17. Barbed block; 18. Rotary encoder; 19. Rotating shaft; 20. Connecting rod; 21. Shaft seat; 22. Crank; 14-1. Seed metering trough; 14-2. Seed unloading trough. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] The purpose of this invention is to provide an electrically controlled direct-insertion precision seeder to solve the problems existing in the prior art. The seeding process is electrically controlled, simple to operate, and can achieve precision seeding.

[0044] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] like Figures 1-14As shown, this utility model provides an electrically controlled direct-insertion precision seeder, including a parallel four-bar linkage, a seeder main frame 2, a duckbill mechanism, and a seed tube 1. The parallel four-bar linkage includes a connecting rod 20, a vertically arranged bearing seat 21, and a crank 22. The crank 22 includes a vertically arranged driving crank and a driven crank. The bearing seat 21 is fixed to the seeder, and a rotating shaft 19, which is connected to the drive mechanism of the seeder, passes through the bearing seat 21. One end of the driving crank is fixedly connected to the upper rotating shaft 19, and the other end is hinged to one end of the connecting rod 20. One end of the driven crank is connected to the upper rotating shaft 19. The lower rotating shaft 19 is fixedly connected, and its other end is hinged to the other end of the connecting rod 20. A photoelectric rotary encoder 18 is installed on the rotating shaft 19 at the upper end of the parallel four-bar linkage. The photoelectric rotary encoder 18 can sense the inner angular displacement of the rotating shaft 19 and transmit the pulse signal to the control module. In this embodiment, the photoelectric rotary encoder 18 is a 3806B photoelectric rotary encoder 18. The photoelectric rotary encoder 18 senses the corresponding inner angular displacement of the rotating shaft 19 and transmits the pulse signal to the control module through the communication module. The communication module is a 485 communication module, and the circuit is as follows: Figure 11 As shown, this is used to exchange information with the absolute encoder, and the button is used to set the initial 0° position. The control module includes a power supply circuit, a control circuit (control unit), a signal conversion circuit, a stepper motor drive module circuit, an electric actuator drive module circuit, a status display circuit, and an OLED display module. Figure 9 As shown, the control unit uses an STM32 microcontroller. The power supply circuit uses an STM32 microcontroller step-down power supply circuit, converting 12V power to 5V to power the microcontroller's minimum system, as shown below. Figure 10 As shown.

[0046] The signal conversion circuit, the LED display screen, the power supply circuit, the stepper motor drive module circuit, and the electric actuator drive module circuit are all connected to the control unit.

[0047] The signal conversion circuit is used to convert the pulse signal to obtain the converted pulse signal.

[0048] The control circuit is used to output a switch signal according to the converted pulse signal, and output it to the stepper motor drive module circuit or the electric actuator drive module circuit; the switch signal is a turn-out command, a turn-back command, a push-out command, or a pull-back command.

[0049] The stepper motor drive module circuit is used to drive the stepper motor to rotate according to the rotation command or the return command. The stepper motor drive module circuit is as follows: Figure 12 As shown.

[0050] The electric actuator drive module circuit is used to drive the electric actuator to extend or retract according to the extend command or the retract command. The electric actuator drive module circuit is as follows: Figure 13 As shown.

[0051] The LED display screen is used to show the current rotation angle of the connecting rod.

[0052] The seeder operates by using two cranks 22 to drive the connecting rod 20 in a circular motion. The seeder is a known structure, so it will not be described in detail. The rotary encoder 18 compiles the rotation information into pulse signals and transmits them to the STM32 microcontroller control integration module. The OLED display module integrated on the microcontroller module is used to display the current rotation angle of the connecting rod 20 and assist the controller in completing the next instruction. The signal conversion circuit converts the pulse signals and transmits them to the control circuit. The control circuit then transmits the switch signals to the seeding module and the electric actuator 10 respectively. The electric actuator 10 is an IP60 DC electric actuator.

[0053] The side wall of the seed tube 1 is connected to the connecting rod 20 by a buckle and can move synchronously with the connecting rod 20; the bottom of the seed tube 1 is fixedly connected to the top of the main frame 2 of the seeder and communicates with the seed dispensing chamber, and can deliver corn seeds into the seed dispensing chamber; the duckbill mechanism is set at the bottom of the main frame 2 of the seeder and communicates with the bottom opening of the seed dispensing chamber. The duckbill mechanism includes an electric push rod 10, which can receive signals from the control module and drive the bottom of the duckbill mechanism to open or close. The main frame 2 of the seeder has a seed metering chamber, which contains a seed metering module. The seed metering module includes a seed metering shaft 14 and a stepper motor 3. The stepper motor 3 is connected to a TB6600 motor driver. After the parallel four-bar linkage rotates from its initial position to a certain angle, the TB6600 motor driver receives a pulse signal from the control circuit and drives the stepper motor 3 to rotate the seed metering shaft 14, completing one rotation-return process and delivering the seeds to the duckbill mechanism. The duckbill mechanism is equipped with a photoelectric sensor 81 to monitor seed drop. When a missed seed is detected, the seed metering shaft 14 is controlled to rotate and return to its original position to complete a replanting. At this time, the seeds are waiting in the duckbill mechanism for the movable duckbill 7 to open and fall into the hole. The movable duckbill 7 is driven to open and close by an IP60 electric push rod 10. When the parallel four-bar linkage drives the duckbill mechanism to complete the hole-making process, the electric push rod 10 is pushed out, causing the movable duckbill 7 to open, allowing the seeds to fall into the hole by their own gravity. Then the electric push rod 10 is pulled back, causing the movable duckbill 7 to close, completing one seed metering process.

[0054] In one specific embodiment, the seed metering module further includes a seed brush 16 and a barb block 17. The seed brush 16 is mounted on the main frame 2 of the seeder and is located on one side of the seed metering shaft 14. The end of the seed brush 16 has a bevel, and the bevel end is connected to the surface of the seed metering shaft 14. The seed metering shaft 14 is rotatably engaged with the main frame 2 of the seeder. The seed metering shaft 14 is provided with a seed metering groove 14-1 and a seed unloading groove 14-2, and the seed unloading groove 14-2 is connected to the rear end of the seed metering groove 14-1. The seed metering groove 14-1 and the seed unloading groove 14-2 can pass through the bevel end of the seed brush 16 in sequence. The barb block 17 is located at the inner bottom of the seed tube 1 and is connected to the seed metering shaft 1. Between the shafts 14, the inner side of the barbed block 17 is provided with a smooth arc surface, which can guide the seeds in the seed dispensing chamber to the seed dispensing groove 14-1. The bottom of the barbed block 17 is made of flexible material, and an arched hole is opened at the bottom of the barbed block 17. When the seed dispensing shaft 14 rotates, the seeds that are not fully filled will be ejected from the seed unloading groove 14-2 under the action of the seed brush 16. The lower end of the barbed block that contacts the seed dispensing shaft 14 is made of flexible TPU material and has an arched hole to facilitate seed ejection, avoiding the damage and missed sowing caused by the squeezing and jamming of seeds that are not fully filled, thus effectively ensuring the integrity of the seeds and improving the sowing quality.

[0055] In this embodiment, the seeding module also includes a Hall proximity switch 12 and a strong magnetic sheet 15, namely, a seeding shaft return Hall detection module, the circuit of which is as follows: Figure 14 As shown, this is used to detect the position of the seed metering shaft to prevent it from failing to return to its initial position after work due to seed jamming. One end of the seed metering shaft 14 is connected to the output shaft of the stepper motor 3, and the other end is fixedly connected to a boss. The side wall of the boss has a groove, and a strong magnetic sheet 15 is placed in the groove. The Hall proximity switch 12 is fixed to the main frame 2 of the seeder. In the initial state, the strong magnetic sheet 15 is parallel to the sensing surface of the Hall proximity switch 12. The Hall proximity switch 12 is fixed to the main frame 2 of the seeder by two thin nuts. When the seed metering shaft 14 completes seed metering and returns to its original position, and the Hall proximity switch 12 senses the strong magnetic sheet 15 and the indicator light illuminates, the stepper motor 3 stops rotating and completes the return, and the seed metering shaft 14 returns to its initial position.

[0056] Linear bearings 5 ​​are provided on both sides of the main frame 2 of the seeder. A guide rod 4 is movably inserted through the linear bearing 5. The bottom of the guide rod 4 is fixedly connected to the seeder limiting base 6. An extension rod is connected to the top of the guide rod 4. A return spring 11 is fixedly connected between the extension rod and the bottom plate of the main frame 2 of the seeder. A duckbill mechanism is provided at the bottom of the bottom plate of the main frame 2 of the seeder. A through hole for the duckbill mechanism to pass through is opened on the seeder limiting base 6. The duckbill mechanism includes a fixed duckbill 8, a movable duckbill 7, and a torsion spring for keeping the movable duckbill 7 and the fixed duckbill 8 engaged. An electric push rod 10 is fixedly installed on the main frame 2 of the seeder. A push block 9 is fixedly connected to the telescopic shaft at the bottom of the electric push rod 10. A fixed rod 13 is provided on one side of the push block 9. A lever is hinged to the movable duckbill 7. A strip groove is provided at the end of the lever away from the movable duckbill 7. The fixed rod 13 is rotatably connected to the strip groove and can slide in the strip groove. The movable duckbill 7 remains normally closed under the self-locking action of the electric push rod 10. When the electric push rod 10 pushes out, the push block 9 moves downward, and the fixed rod 13 moves along the strip groove during the movement. At the same time, it drives the lever to move diagonally downward away from the fixed duckbill 8. As a result, the movable duckbill 7 rotates counterclockwise around the hinge axis at a certain angle, the duckbill opens, and the seed falls into the hole by its own gravity. Then the electric push rod 10 is pulled back, causing the movable duckbill 7 to rotate clockwise until the duckbill closes.

[0057] In this embodiment, a side pipe 111 is provided on one side of the upper part of the seed tube 1, and a servo motor 112 is installed on the top of the seed tube 1. The output end of the servo motor 112 is connected to a coaxially arranged straight shaft 113 through a coupling. The straight shaft 113 is located inside the seed tube 1, and a conveying blade 114 is fixedly connected to the outer circumferential surface of the straight shaft 113. The conveying blade 114 is used for conveying corn seeds inside the seed tube 1.

[0058] In the initial state of operation, the movable duckbill 7 is normally closed under the self-locking action of the electric push rod 10, cooperating with the fixed duckbill 8. The bottom end of the duckbill is located at the upper end of the seeder limiting base 6. The reset spring 11 has no elastic potential energy. The strong magnetic sheet 15 on the seed metering shaft 14 is parallel to the sensing surface of the Hall proximity switch and is distributed horizontally. The seeds in the seed metering chamber are filled into the seed metering groove 14-1 of the seed metering shaft 14. The connecting rod 20 of the parallel four-bar linkage is perpendicular to the ground. At this time, the rotary encoder 18 is zeroed and the angle is displayed as 0° on the OLED display screen.

[0059] The seeder moves forward. When a direct-insertion seeding operation needs to be completed, the drive mechanism on the seeder drives the connecting rod 20 and the entire seeder in this embodiment to rotate counterclockwise downwards via two cranks 22. The drive mechanism includes an engine and a sprocket connected to the output shaft of the engine. The sprocket is connected to a drive gear via a closed rack and pinion transmission. The drive gear is connected to the drive crank via a transmission shaft. This drive mechanism is known technology and will not be described in detail. When the crank 22 is at a 45° angle to the ground, the rotary encoder 18 outputs a pulse signal to the 485 communication module. After the signal is compiled by the communication module and sent to the STM32 microcontroller, the STM32 microcontroller issues a rotation command to the stepper motor to drive the motor. The stepper motor 3 output shaft drives the seed metering shaft 14 to rotate 90° counterclockwise. Seeds pre-filled in the seed metering trough 14-1 fall smoothly into the closed beak under the drive of the seed metering shaft, waiting for the beak to open and fall into the seed hole. Seeds not fully filled are cleared out of the seed metering trough 14-1 by the seed brush 16 and enter the seed unloading trough 14-2. Then, the STM32 microcontroller sends a rotation command to the stepper motor driver, controlling the stepper motor 3 output shaft to drive the seed metering shaft 14 to rotate clockwise until the seed metering shaft returns to its original position. When the Hall proximity switch 12 senses the magnetic plate 15 and the indicator light illuminates, the stepper motor 3 stops rotating and completes its return to its original position. During this process, the seeds cleared into the seed unloading trough 14-2 are removed. The seeds are gently discharged into the seed metering chamber, while new seeds re-enter the seed metering trough to await planting. As the seeper continues to descend until the lower end of the seeper limiting base 6 touches the soil, the seeper main frame 2 drives the duckbill downwards and inserts it into the soil to complete the hole-making. The return spring 11 is stretched, and the guide rod 4 and the seeper limiting base 6 remain fixed and relatively stationary. When the crank rotates to 180° and is perpendicular to the ground again, the seeper reaches the bottom and completes the hole-making. At this time, the rotary encoder 18 outputs a pulse signal to the 485 communication module. After the signal is compiled by the communication module and sent to the STM32 microcontroller, the STM32 microcontroller issues a push command to the electric actuator driver, controlling the electric actuator 10 to push out. The push block 9, used to fix the top rod of the electric push rod 10 and the fixed rod 13 on the movable duckbill 7, is pushed down vertically. The movable duckbill 7 rotates counterclockwise around the hinge axis at a certain angle, the duckbill opens, and the seed falls into the hole by its own weight. Then the electric push rod 10 is pulled back, driving the movable duckbill 7 to rotate clockwise until the duckbill closes. As the seed planter's limiting base 6 gradually rises and leaves the ground, the reset spring 11 pulls the seed planter's main frame 2 and the duckbill back to the initial state. When the parallel four-bar linkage 20 is perpendicular to the ground again, the rotary encoder 18 is zeroed and the angle is displayed as 0° on the OLED display screen. In this embodiment, the seed planter returns to the initial state, completing one direct insertion seeding operation.

[0060] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An electrically controlled direct insertion precision hill-drop planter, characterized in that: include: A parallel four-bar linkage includes a driving crank, a driven crank, a connecting rod, and vertically arranged bearing seats. The bearing seats are fixed to a seeding machine. A rotating shaft that is connected to the drive mechanism of the seeding machine passes through the bearing seats. One end of the driving crank is fixedly connected to the upper rotating shaft, and the other end is hinged to one end of the connecting rod. One end of the driven crank is fixedly connected to the lower rotating shaft, and the other end is hinged to the other end of the connecting rod. A photoelectric rotary encoder is installed on the rotating shaft at the upper end of the parallel four-bar linkage. The photoelectric rotary encoder can sense the inner angular displacement of the rotating shaft and transmit pulse signals to the control module. The main frame of the seeder has a seed metering chamber inside, and a seed metering module inside the seed metering chamber. The seed metering module includes a seed metering shaft and a stepper motor. The stepper motor can receive signals from the control module and drive the seed metering shaft to rotate. The seed metering module also includes a Hall effect proximity switch and a strong magnetic sheet to detect the position of the seed metering shaft, so that the seed metering shaft will not fail to return to its initial position after the work is completed due to seed jamming. The seed tube has its sidewall connected to the connecting rod via a snap-fit ​​and can move synchronously with the connecting rod; the bottom of the seed tube is fixedly connected to the top of the main frame of the seeder and communicates with the seed dispensing chamber, enabling it to deliver corn seeds into the seed dispensing chamber; A duckbill mechanism is located at the bottom of the main frame of the seeder and communicates with the bottom opening of the seeding chamber. The duckbill mechanism includes an electric actuator that can receive signals from the control module and drive the bottom of the duckbill mechanism to open or close. The control module includes a signal conversion circuit, a control unit, an LED display screen, a power supply circuit, a stepper motor drive module circuit, and an electric actuator drive module circuit; the signal conversion circuit, the LED display screen, the power supply circuit, the stepper motor drive module circuit, and the electric actuator drive module circuit are all connected to the control unit; The signal conversion circuit is used to convert the pulse signal to obtain the converted pulse signal; The control unit is used to output a switch signal according to the converted pulse signal, and output it to the stepper motor drive module circuit or the electric actuator drive module circuit; the switch signal is a turn-out command, a turn-back command, an eject command, or a pull-back command; The stepper motor drive module circuit is used to drive the stepper motor to rotate according to the turn-out command or the turn-back command; The electric actuator drive module circuit is used to drive the electric actuator to extend or retract according to the extend command or the retract command; The LED display screen is used to display the current rotation angle of the connecting rod; A photoelectric sensor is provided inside the duckbill mechanism, which is used to monitor the corn seeds passing through the duckbill mechanism.

2. The electrically controlled direct-insertion precision hill-drop planter according to claim 1, characterized in that: The seed metering module further includes a seed brush and a barb block. The seed brush is mounted on the main frame of the seeder and is located on one side of the seed metering shaft. The end of the seed brush has a bevel, and the bevel end is connected to the surface of the seed metering shaft. The seed metering shaft is rotatably engaged with the main frame of the seeder. The seed metering shaft is provided with a seed metering groove and a seed unloading groove, and the seed unloading groove is connected to the rear end of the seed metering groove. The seed metering groove and the seed unloading groove can pass through the bevel end of the seed brush in sequence. The barb block is located between the inner bottom of the seed tube and the seed metering shaft. The inner side of the barb block is provided with a smooth arc surface, which can guide the seeds in the seed metering cavity to the seed metering groove. The bottom end of the barb block is made of flexible material, and an arched hole is opened at the bottom of the barb block. The stepper motor is fixedly mounted on the main frame of the seeder, and one end of the seed metering shaft is connected to the output shaft of the stepper motor.

3. The electrically controlled direct-insertion precision hill-drop planter according to claim 2, characterized in that: One end of the seeding shaft is connected to the output shaft of the stepper motor, and the other end is fixedly connected to a boss. The side wall of the boss is provided with a groove, and the strong magnetic sheet is provided in the groove. The Hall proximity switch is fixed on the main frame of the seeder. In the initial state, the strong magnetic sheet is parallel to the sensing surface of the Hall proximity switch.

4. The electrically controlled direct-insertion precision hill-drop planter according to claim 1, characterized in that: Linear bearings are provided on both sides of the main frame of the seeder. A guide rod is movably inserted through the linear bearing. The bottom of the guide rod is fixedly connected to the seeder limiting base. An extension rod is connected to the top of the guide rod. A return spring is fixedly connected between the extension rod and the bottom plate of the main frame of the seeder. The bottom of the bottom plate of the main frame of the seeder is provided with the duckbill mechanism. The seeder limiting base has a through hole for the duckbill mechanism to pass through. The duckbill mechanism includes a fixed duckbill, a movable duckbill, and a torsion spring for keeping the movable duckbill engaged with the fixed duckbill.

5. The electrically controlled direct-insertion precision hill-drop planter according to claim 4, characterized in that: The electric push rod is fixedly mounted on the main frame of the seeder. A push block is fixedly connected to the telescopic shaft at the bottom of the electric push rod. A fixed rod is provided on one side of the push block. A lever is hinged to the movable duckbill. A strip groove is provided at the end of the lever away from the movable duckbill. The fixed rod is rotatably connected to the strip groove and can slide within the strip groove.

6. The electrically controlled direct-insertion precision hill-drop planter according to claim 1, characterized in that: A side pipe is provided on one side of the upper part of the seed tube, and a servo motor is installed on the top of the seed tube. The output end of the servo motor is connected to a coaxial straight shaft through a coupling. The straight shaft is located inside the seed tube, and a conveying blade is fixedly connected to the outer circumference of the straight shaft. The conveying blade is used to convey corn seeds inside the seed tube.

7. The electrically controlled direct-insertion precision hill-drop planter according to claim 2, characterized in that: The seed metering trough is funnel-shaped, and its size is matched to the size of a single seed or two seeds. The depth of the seed unloading trough is less than the depth of the seed metering trough, and the depth of the connecting portion between the seed unloading trough and the seed metering trough is greater than the depth of both the seed metering trough and the seed unloading trough.

8. The electrically controlled direct-insertion precision hill-drop planter according to claim 1, wherein: It also includes a communication module; the photoelectric rotary encoder is connected to the control module through the communication module.

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