High-precision electrically-driven finger clamping type seed-metering device

Abstract

A high-precision electrically-driven finger-clamping type seed-metering device comprises a seed-metering box, a seed storage chamber is arranged in the seed-metering box, a seed inlet, a seed-metering opening and a gear motor are arranged on the seed-metering box, a rotatable seed-metering disc shell driven by the gear motor is installed in the seed-metering box, and a plurality of resettable rotating shafts which are evenly distributed in the circumferential direction are arranged on the seed-metering disc shell. The rotating shaft extends to the outer circular surface of the seed-metering disc along the radial direction and can swing along the axis of the rotating shaft, the finger clip is fixedly arranged at the radial outer end of the rotating shaft, the seed-metering disc core is rotationally arranged in the seed-metering disc shell, and the seed-metering disc core penetrates out of the two ends of the seed-metering disc shell and is fixedly arranged with the seed-metering box; and a proximity switch I and a proximity switch II are fixedly arranged on the outer circular surface of the plate core of the seed-metering plate and are positioned right above the seed-metering opening. When the finger clamp miss clamping seeds, seed miss is prevented; when the walking distance is equal to the plant spacing set by the controller, the controller drives the gear motor to rotate to control the finger clamps to release the seeds, and the plant spacing of the discharged seeds is accurate.

Description

Technical Field

[0001] The utility model relates to a seed metering device, in particular to a high-precision electric-driven finger-clamping seed metering device. Background Art

[0002] A seed meter is an agricultural machine that discharges seeds into cultivated land at a certain spacing. It is widely used due to its high degree of mechanization and high efficiency.

[0003] Existing seeding methods include scoop wheel, finger clamp, and air suction, and the power source for driving the seeding device can be mechanical or electric. The working principle of the finger clamp seeding device is that as the seeding disc rotates, the fingers installed circumferentially on the seeding disc close or open to clamp or release the seeds, thereby achieving the purpose of seeding.

[0004] The existing finger-clamp type seed metering device has the following defects: 1. There is a phenomenon of seeds not being clamped when the finger clamps are closed, resulting in missed seeds during seeding; 2. The controller of the electric-driven finger-clamp type seed metering device only controls the speed of the reduction motor and does not participate in the seeding action. In addition, the reduction motor that drives the seed disc to rotate is connected to the power supply of the tractor. The voltage of the tractor power supply fluctuates, resulting in unstable speed of the reduction motor and inaccurate seed spacing. Summary of the Invention

[0005] The utility model is to solve the above-mentioned technical problems and provides a high-precision electric-driven finger-clamp type seed metering device, which, when a finger clamp misses a seed, quickly re-seeds it through the next finger clamp to prevent missed seeds; and a distance sensor sends a walking distance signal to a controller. When the walking distance is equal to the plant spacing set by the controller, the controller drives the reduction motor to rotate and control the finger clamp to release the seeds. It is independent of the motor speed and the power supply voltage, and the seed spacing of the discharged seeds is accurate.

[0006] The technical solution of this utility model is:

[0007] The invention relates to a high-precision electric-driven finger-clamp type seed meter, comprising a seed box, a seed storage chamber provided in the seed box, a seed inlet, a seed outlet and a reduction motor provided on the seed box, and a seed disc assembly installed in the seed box. The special feature of the invention is that the seed disc assembly comprises a rotatable seed disc shell driven by the reduction motor, a plurality of circumferentially evenly distributed resettable shafts are provided on the seed disc shell, the shafts extend radially to the outer circumference of the seed disc and can swing along the axis of the shaft, a finger clamp is fixedly installed at the radial outer end of the shaft, a seed disc core is rotatably installed in the seed disc shell, the seed disc core passes through the two ends of the seed disc shell and is fixedly installed with the seed box; a proximity switch I and a proximity switch II are fixedly installed on the outer circumference of the seed disc core and just above the seed outlet, the proximity switch I is used to detect whether seeds are clamped in the finger clamp and send a switch signal, and the proximity switch II is used to send a switch signal for stopping the motor when there are seeds in the finger clamp.

[0008] Furthermore, the high-precision electric-driven finger-clamp seed metering device is also provided with a controller and a distance sensor. The controller includes a single-chip microcomputer, a power supply circuit and a drive circuit. The distance sensor, proximity switch I and proximity switch II are connected to the signal input end of the controller, and the drive circuit is connected between the signal output end of the single-chip microcomputer and the reduction motor.

[0009] Furthermore, an arc-shaped boss is provided on the outer circumferential surface of the seed disc core, a cam cooperating with the arc-shaped boss is provided on the radial inner end of the rotating shaft, a torsion spring is installed between the rotating shaft and the seed disc outer shell, the arc-shaped boss pushes the cam to drive the rotating shaft to rotate, and the torsion spring drives the rotating shaft to return to its position.

[0010] Furthermore, there are two arc-shaped bosses, which are arranged opposite to each other.

[0011] Furthermore, two circumferentially adjacent cams are opposite to each other on the left and right, and two circumferentially adjacent finger clamps are opposite to each other on the left and right, and the cams cooperate with corresponding side arc-shaped bosses.

[0012] Furthermore, a transmission mechanism is connected between the output end of the reduction motor and the seed disc housing.

[0013] Furthermore, the transmission mechanism is a bevel gear transmission mechanism.

[0014] Furthermore, a roller is rotatably mounted on the cam to reduce cam friction.

[0015] Furthermore, seed holes corresponding to the finger clamps are provided on the seed tray shell.

[0016] Furthermore, a seed bucket connected to the seed inlet is fixedly installed on the seed box.

[0017] The beneficial effects of the utility model are:

[0018] 1. When the finger clamp misses a seed, the finger clamp closes, the proximity switch I is misaligned with the cam, and the proximity switch I sends a seed missing signal to the controller. The controller controls the reduction motor to continue rotating and fills the position of the next finger clamp holding the seed to prevent the seed missing phenomenon.

[0019] 2. When the tractor is moving, the distance sensor sends the travel distance signal to the controller. When the travel distance is equal to the plant spacing set by the controller, the controller drives the reduction motor to rotate the seed disc housing, and the finger clamp holding the seeds rotates to the proximity switch II. The proximity switch II sends a signal to the controller, and the controller controls the reduction motor to stop. At this time, the arc-shaped boss pushes the cam to drive the finger clamp to open. The seeds are quickly thrown to the ground through the seed discharging port under the inertia of the rotation of the seed disc housing. It is independent of the motor speed and power supply voltage, and the discharged seeds are accurately spaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle seed tray assembly;

[0022] Figure 3 yes Figure 2 Internal structure diagram of the middle seed tray assembly;

[0023] Figure 4 yes Figure 2 Schematic diagram of the structure of the middle seed tray core;

[0024] Figure 5 It is a circuit block diagram of the utility model;

[0025] In the figure: 1-seed box, 2-seed storage chamber, 3-seed inlet, 4-seed bucket, 5-seed outlet, 6-seed tray housing, 7-reduction motor, 8-bevel gear transmission mechanism, 9-rotating shaft, 10-torsion spring, 11-cam, 12-roller, 13-finger clamp, 14-seed hole, 15-seed tray core, 16-arc boss, 17-distance sensor, 18-proximity switch I, 19-proximity switch II, 20-single chip microcomputer, 21-power circuit, 22-drive circuit. DETAILED DESCRIPTION

[0026] like Figure 1-Figure 5As shown, a high-precision electric-driven finger-clamp type seed metering device includes a seed box, a seed storage chamber is provided in the seed box, a seed inlet is provided at the upper end of the seed box, a seed bucket connected to the seed inlet is fixedly installed on the seed box, and a seed outlet is provided at the lower end of the seed box; a seed disc assembly is installed in the seed box, and the seed disc assembly includes a seed disc shell rotatably installed in the seed box, a reduction motor is fixedly installed on the seed box, a bevel gear transmission mechanism is connected between the output end of the reduction motor and the seed disc shell, and a circumferentially evenly distributed rotating shaft is provided on the seed disc shell, and the rotating shaft extends in a radial direction and is rotatably installed on the seed disc shell. On the outer shell of the seed disc, a torsion spring is installed between the rotating shaft and the outer shell of the seed disc, a cam is provided at the radial inner end of the rotating shaft, and two circumferentially adjacent cams are opposite to each other, a roller is rotatably installed on the cam, and a finger clamp is fixedly installed at the radial outer end of the rotating shaft, and two circumferentially adjacent finger clamps are opposite to each other, and seed holes corresponding to the finger clamps are provided on the outer shell of the seed disc; the seed disc core is rotatably installed in the outer shell of the seed disc, and the center of the seed disc core passes through the two ends of the seed disc shell and is fixedly installed with the seed box, and two oppositely arranged arc-shaped bosses are provided on the outer circumference of the seed disc core, and the roller cooperates with the corresponding side arc-shaped bosses. The high-precision electric-driven finger-clamp seed metering device is also provided with a distance sensor, a group of proximity switches I and a group of proximity switches II and a controller. The controller includes a single-chip microcomputer, a power supply circuit and a drive circuit. The distance sensor, a group of proximity switches I and a group of proximity switches II are connected to the signal input end of the single-chip microcomputer, and the drive circuit is connected between the signal output end of the single-chip microcomputer and the reduction motor. The proximity switches I and II are installed on the outer cylindrical surface of the seed disc core and correspond to the front end of the arc-shaped boss.

[0027] The working principle of this utility model is:

[0028] The high-precision electric-driven finger-clamp seed metering device is installed at the rear of a tractor. When the tractor drives the high-precision electric-driven finger-clamp seed metering device to move, the distance sensor sends a travel distance signal to the controller. When the travel distance is equal to the plant spacing set by the controller, the controller drives the reduction motor to drive the seed disc shell to rotate, and the finger clamp holding the seeds rotates to the proximity switch II. The proximity switch II sends a signal to the controller, and the controller controls the reduction motor to stop. At this time, the arc-shaped boss pushes the cam to drive the finger clamp to open, and the seeds are quickly thrown to the ground through the seeding port under the inertia of the rotation of the seed disc shell.

[0029] After the seeds fall to the ground through the seed discharging port, the finger clamps are still in an open state. When the finger clamps in the open state enter the seed storage chamber, the seeds in the seed storage chamber enter the finger clamps; when the cam disengages from the arc-shaped boss, the finger clamps close and clamp the seeds under the action of the torsion spring; when the finger clamps clamping the seeds rotate to the proximity switch II, the proximity switch II sends a signal to the controller, and the controller controls the reduction motor to stop. At this time, the arc-shaped boss pushes the cam to drive the finger clamps to open, and the seeds are quickly thrown to the ground through the seed discharging port under the inertia of the rotation of the seed disc shell; repeat the above operations to realize the process of continuous seed collection and seeding.

[0030] If a seed is missed by the finger clamp, the clamp closes, causing proximity switch I to misalign with the cam. This sends a seed-missing signal to the controller, which controls the reduction motor to continue rotating and replace the next finger clamp holding a seed to prevent it from missing. The seed-holding finger clamp rotates to proximity switch II, which sends a signal to the controller, causing the reduction motor to stop. At this point, the curved boss pushes the cam to open the finger clamp. The seeds are quickly thrown from the finger clamp to the ground under the inertia of the rotating seed disc housing, ensuring precise seed spacing between plants.

[0031] The above are only specific embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A high-precision electric-driven finger-clamp seed metering device, comprising a seed box, a seed storage chamber provided in the seed box, a seed inlet, a seed discharge port and a reduction motor provided on the seed box, and a seed disc assembly installed in the seed box, characterized in that: The seed disc assembly includes a rotatable seed disc shell driven by a reduction motor, and a plurality of circumferentially evenly distributed resettable rotating shafts are arranged on the seed disc shell, the rotating shafts extend radially to the outer circumference of the seed disc and can swing along the axis of the rotating shaft, a finger clamp is fixedly installed at the radial outer end of the rotating shaft, and a seed disc core is rotatably installed in the seed disc shell, the seed disc core passes through both ends of the seed disc shell and is fixedly installed with the seed box; a proximity switch I and a proximity switch II are fixedly installed on the outer circumference of the seed disc core and directly above the seeding port, the proximity switch I is used to detect whether seeds are clamped in the finger clamp and send a switch signal, and the proximity switch II is used to send a switch signal for stopping the motor when there are seeds in the finger clamp.

2. The high-precision electric-driven finger-clamping seed metering device according to claim 1 is characterized in that: The high-precision electric-driven finger-clamp seed metering device is also provided with a controller and a distance sensor. The controller includes a single-chip microcomputer, a power supply circuit and a drive circuit. The distance sensor, proximity switch I and proximity switch II are connected to the signal input end of the controller, and the drive circuit is connected between the signal output end of the single-chip microcomputer and the reduction motor.

3. The high-precision electric-driven finger-clamping seed metering device according to claim 1 is characterized in that: An arc-shaped boss is arranged on the outer circumferential surface of the seeding disc core, a cam matched with the arc-shaped boss is arranged on the radial inner end of the rotating shaft, and a torsion spring is installed between the rotating shaft and the seeding disc shell.

4. The high-precision electric-driven finger-clamping seed metering device according to claim 3 is characterized in that: There are two arc-shaped bosses, which are arranged opposite to each other.

5. The high-precision electric-driven finger-clamping seed metering device according to claim 4 is characterized in that: Two circumferentially adjacent cams are opposite to each other on the left and right sides, and two circumferentially adjacent finger clamps are opposite to each other on the left and right sides, and the cams are matched with corresponding side arc-shaped bosses.

6. The high-precision electric-driven finger-clamping seed metering device according to claim 1 is characterized in that: A transmission mechanism is connected between the output end of the reduction motor and the seed disc housing.

7. The high-precision electric-driven finger-clamping seed metering device according to claim 6 is characterized in that: The transmission mechanism is a bevel gear transmission mechanism.

8. The high-precision electric-driven finger-clamping seed metering device according to claim 3 is characterized in that: A roller is rotatably mounted on the cam.

9. The high-precision electric-driven finger-clamping seed metering device according to claim 1, characterized in that: A seed hole corresponding to the finger clamp is provided on the outer shell of the seeding disc.

10. The high-precision electric-driven finger-clamping seed metering device according to claim 1, characterized in that: A seed bucket connected to the seed inlet is fixedly installed on the seed box.

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