A roller-type double-action finger-clamp precision seed drill

Abstract

The present invention discloses a roller-type double-action finger-clamp precision seed drill, belonging to the technical field of seeding equipment. The seed-picking assembly includes a paddle, a second elastic element, and a finger clamp. The finger clamp includes two finger clamps, namely an active finger clamp and a passive finger clamp. The middle parts of the two finger clamps are hinged and the hinge point is fixed to the seeding disk. The second elastic element is used to push the heads of the two finger clamps to rotate in directions away from each other. During the rotation of the seeding disk, when the finger clamp rotates to enter the seeding opening, the passive finger clamp rotates under the action of the second elastic element to unload the seeds. When the finger clamp leaves the seeding opening, a cam drives the active finger clamp to rotate, causing the head of the passive finger clamp to extend into the shell. In the present invention, after the seeds are picked up by the finger clamp, they are clamped and protected by the two finger clamps, thereby separating from the inner wall of the shell. Therefore, when the finger clamp continues to rotate, the seeds no longer rub against the inner wall of the shell, which is beneficial to protecting the seeds and reducing the friction damage they suffer, which is beneficial to improving the survival rate of the seeds.

Description

Technical Field

[0001] The present invention relates to the technical field of sowing equipment, in particular to a finger-clamp type seed metering device, in particular to a roller type double-action finger-clamp precision seeding device. Background Art

[0002] The finger-clamp type seeding device is a conventional sowing equipment. Its core feature is that it adopts a roller structure. When the roller structure rotates, it drives the finger clamp to rotate. When the finger clamp passes the seed box, it opens the finger clamp with the cooperation of the cam profile to obtain seeds. Then the finger clamp rotates with the seeds along with the roller. When it reaches the sowing area, the seeds are discharged from the seed discharge port by centrifugal force to complete the sowing process. The specific structure can refer to the rolling seeder disclosed in CN109952836A. One problem with this type of device is that a single-action finger clamp is currently used. The finger clamp pushes the seeds to move in the shell. When the finger clamp rotates with the seeds, one side of the seed is in contact with the finger clamp, which is static friction, and the other side is always in contact with the annular inner wall of the shell, which is dynamic friction. This makes the seeds susceptible to friction damage, affecting the survival rate of the seeds in the later stage. Therefore, it limits the applicable scenarios and sowing efficiency of the equipment. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a roller-type double-moving finger clamp precision seed drill. The present invention adopts a double-moving finger clamp to take seeds. When the seeds move in the shell, they are clamped and protected by the double-moving finger clamp, thereby avoiding sliding friction, reducing the probability of seed damage, and improving the survival rate of seeds.

[0004] In order to achieve the above object, the specific scheme of the present invention is as follows:

[0005] A roller-type double-action finger-clamp precision seed drill comprises a rotating shaft and a rotating drum connected in a coaxial rotation, a cam and an annular shell fixedly connected coaxially to the rotating shaft, and a roller mechanism and a seeding disk fixedly connected coaxially to the rotating drum; the roller mechanism is used to drive the seeding disk to rotate, the cam and the seeding disk are both located in the shell, and a plurality of seed taking assemblies are arranged in an annular array on the seeding disk, a seeding opening is provided on the annular side wall of the shell, and a seeding hole for replenishing seeds into the shell is provided on the shell, the area in the shell covered with scattered seeds is called the seeding area, and the area from the seed taking assembly leaving the seeding area to entering the seeding opening is called the clamping area, and the seed taking assembly is characterized in that it comprises:

[0006] A paddle hinged to the seed disc in the middle;

[0007] a first elastic element for pushing the paddle to rotate until it abuts against the annular outer wall of the cam;

[0008] Finger clamp, the finger clamp includes two finger clamps, namely the active finger clamp and the driven finger clamp, the middle parts of the two finger clamps are hinged and the hinge point is fixed on the seed disc;

[0009] a second elastic element for pushing the heads of the two finger clamps to rotate in directions away from each other;

[0010] A connecting rod having one end hinged to one end of the active finger clamp and the other end hinged to one end of the paddle;

[0011] Among them, during the rotation of the seed disc, the paddle rotates to continuously abut against the outer contour of the cam, thereby driving the active finger clamp to rotate. When the finger clamp buckle rotates to enter the seeding port, the driven finger clamp rotates under the action of the second elastic element, so that the head of the driven finger clamp moves in the direction away from the head of the active finger clamp, thereby completing the seed unloading operation. When the finger clamp buckle leaves the seeding port, the cam drives the active finger clamp to rotate, so that the head of the driven finger clamp extends into the shell; after the finger clamp buckle leaves the seeding port, the head and tail of the driven finger clamp both abut against the annular inner wall of the shell; when the finger clamp buckle reaches the lowest point, the distance between the heads of the two finger clamps is greater than the size of the seed, so that the seed can be taken; when the finger clamp buckle leaves the seed taking area, the cam drives the head of the active finger clamp to move in the direction close to the head of the driven finger clamp, thereby clamping the seed.

[0012] As a specific embodiment of the present invention, after the finger clamp reaches the seeding port and the head of the driven finger clamp rotates in a direction away from the head of the active finger clamp, the seeds pass through the seeding port by centrifugal force.

[0013] As a specific embodiment of the present invention, a flexible pad is provided at the part of the head of the finger clamp that clamps the seeds, so as to further reduce the clamping damage to large-sized seeds.

[0014] As a specific embodiment of the present invention, the connecting rod is an elastic telescopic rod. When the finger clamp enters the seeding port, the length of the connecting rod changes to push the heads of the two finger clamps out of the seeding port.

[0015] Furthermore, the connecting rod includes a first barrel section, a second barrel section, a first spring, and a second spring. The first barrel section is coaxially sleeved within the second barrel section. The first spring is used to push the first barrel section and the second barrel section to move in the direction of extending the connecting rod, and the second spring is used to push the first barrel section and the second barrel section to move in the direction of shortening the connecting rod. The length of the first barrel section and the second barrel section when not subjected to axial external force is the equilibrium length of the connecting rod. Before the finger clamp enters the seeding port, the length of the connecting rod is greater than or less than the equilibrium length. When the finger clamp enters the seeding port, the length of the connecting rod returns to the equilibrium length, thereby pushing the heads of both finger clamps out of the seeding port. In this way, the connecting rod can be used to assist in delivering seeds into the seeding port, which reduces the requirement for centrifugal force. At the same time, the connecting rod has a certain degree of elasticity and can be extended and retracted, which is also convenient for adapting to seeds of different sizes and reducing damage to the seeds during the clamping process.

[0016] As a specific embodiment of the present invention, the connecting rod is hinged to the head of the active finger clamp, and the connecting rod is shorter than the equilibrium length before the finger clamp enters the seeding port.

[0017] As a specific embodiment of the present invention, the connecting rod is hinged to the tail of the active finger clamp, and the connecting rod is longer than the balance length before the finger clamp enters the seeding port.

[0018] As a specific embodiment of the present invention, the roller mechanism includes an annular outer ring, a fixed plate, a cover plate and a duckbill, wherein the fixed plate and the cover plate are fixedly connected to the left and right side walls of the annular outer ring respectively, and the fixed plate is fixedly connected to the rotating drum; the annular outer ring is slidingly connected to the annular outer wall of the shell; a plurality of through holes are arranged in a circular row on the annular outer ring, and a duckbill is installed at the outlet of each through hole.

[0019] Compared with the existing technology, it has the following advantages:

[0020] In the present invention, after the seeds are captured by the finger clamps, they are clamped and protected by the two finger clamps, thereby separating from the inner wall of the shell. Therefore, when the finger clamps continue to rotate, the seeds no longer have dynamic friction with the inner wall of the shell, which is beneficial to protecting the seeds and reducing the friction damage they suffer, which is beneficial to improving the survival rate of the seeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of a specific embodiment of the roller-type double-action finger-clamp precision seeding device of the present invention;

[0022] Figure 2 for Figure 1 A three-dimensional view of the seed-discharging roller-type double-action finger-clamp precision seed drill from another angle;

[0023] Figure 3 Figure 1 sectional view of

[0024] Figure 4 for Figure 1 Schematic diagram of the state in which the roller-type double-action finger-clamp precision seed drill at the seeding port buckles the finger clamp into the shell;

[0025] Figure 5 for Figure 1 Schematic diagram of the three-dimensional structure of the seed extraction component;

[0026] Figure 6 for Figure 1 Schematic diagram of the structure of the middle shell;

[0027] Figure 7 is a structural diagram of the connecting rod;

[0028] Figure 8 is a schematic diagram of the three-dimensional structure of a seeding assembly in another embodiment;

[0029] In the figure, the rotating shaft 100; the rotating drum 200; the cam 300; the housing 400; the seed disc 500;

[0030] Seed discharge port 410; Supplementary port 420;

[0031] Annular outer ring 610; fixing plate 620; cover plate 630; duckbill 640;

[0032] Pick 710; finger clip 720; connecting rod 730;

[0033] Active finger clamp 721; driven finger clamp 722;

[0034] First barrel section 731 ; second barrel section 732 ; first spring 733 ; second spring 734 . DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0036] Example: Please refer to Figures 1 to 6 , which shows the structure of a specific embodiment of the roller-type double-action finger-clamp precision seed drill of the present invention. The roller-type double-action finger-clamp precision seed drill of the present invention includes a rotating shaft 100, a rotating drum 200, a cam 300, a housing 400, a seed disc 500, and a roller mechanism. The rotating shaft 100 and the rotating drum 200 are coaxially connected for rotation. The housing 400 is annular. The housing 400 and the cam 300 are both coaxially fixedly connected to the rotating shaft 100. The roller mechanism 600 and the seed disc 500 are both coaxially fixedly connected to the rotating drum 200. Therefore, the roller mechanism 600 can be used to drive the seed disc 500 to rotate relative to the cam 300 and the housing 400. The cam 300 and the seed disc 500 are both located in the shell 400, and a plurality of seed taking components are arranged in a circular array on the seed disc 500. A seed outlet 410 is provided on the annular side wall of the shell 400. The shell 400 serves as a seed box. The shell 400 is provided with a seeding hole 420 for replenishing seeds into the shell 400. The area in the shell 400 that is filled with scattered seeds is called the seed taking area, and the area from the seed taking component leaving the seed taking area to entering the seed outlet 410 is called the clamping area.

[0037] When in use, the roller mechanism drives the seeding disc 500 to rotate around the cam 300 and the housing 400, and uses the outer contour of the cam 300 to control the movement of the seed taking component, so that it can obtain seeds in the seed taking area and discharge the seeds from the seeding port 410.The seed-taking assembly of the present invention includes a paddle 710, a first elastic element, a finger clamp 720, a second elastic element, and a connecting rod 730, wherein the first elastic element and the second elastic element 2 are both torsion springs, and the middle part of the paddle 710 is hinged to the seed disc 500, so that it can rotate relative to the seed disc 500, and the first elastic element 711 is used to push the paddle 710 to rotate until it abuts the annular outer wall of the cam 300. Therefore, when the paddle 710 rotates with the seed disc 500, the paddle 710 will rotate with the change of the outer contour diameter of the cam 300, so that the rotation of the paddle 710 can be controlled by the outer contour of the cam 300; the finger clamp 720 includes two finger clamps, namely an active finger clamp 721 and a driven finger clamp 722, and the middle parts of the two finger clamps are hinged. And the hinge point is fixed on the seed disc 500, so the two finger clamps can rotate relative to each other, and the seeds can be grabbed, clamped and released by controlling the opening of the heads of the two finger clamps; the second elastic element is used to push the heads of the two finger clamps to rotate in directions away from each other; one end of the connecting rod 730 is hinged to one end of the active finger clamp 721, and the other end is hinged to one end of the paddle 710. Therefore, during the rotation of the seed disc 500, the paddle 710 rotates to continuously abut the outer contour of the cam 300, thereby driving the active finger clamp 721 to rotate through the connecting rod 730. When the finger clamp buckle 720 rotates to enter the seeding port 410, the driven finger clamp 722 rotates under the action of the second elastic element 712, so that the head of the driven finger clamp 722 moves away from the active finger clamp 721. When the finger clip 720 leaves the seeding port 410, the cam 300 drives the active finger clip 721 to rotate, which will drive the entire finger clip 722 to rotate, that is, the driven finger clip 722 rotates together with the active finger clip 721, so that the head of the driven finger clip 722 extends into the shell 400. In this way, when the rotation continues, the edge of the seeding port 410 abuts against the tail of the driven finger clip 722, thereby pushing the driven finger clip 722 to rotate and retracting the entire finger clip 720 into the shell 400; after the finger clip 720 leaves the seeding port 410, the head and tail of the driven finger clip 722 abut against the annular inner wall of the shell 400; when the finger clip reaches the lowest point, the distance between the heads of the two finger clips is greater than the size of the seed, so that In order to take out seeds, in a specific implementation, when the finger clamp 720 reaches the lowest point, the cam 300 can be used to drive the active finger clamp 721 to rotate, so that the head of the active finger clamp 721 rotates in the direction away from the head of the driven finger clamp 722, so that seeds can be taken out. Of course, the outer contour of the cam 300 can also be adjusted so that the finger clamp 720 is open during the entire process from leaving the seed outlet 410 to reaching the lowest point, maintaining this state of being able to take out seeds; when the finger clamp 720 leaves the seed taking area, the cam 300 drives the head of the active finger clamp 721 to move toward the direction close to the head of the driven finger clamp 722, thereby clamping the seeds. When the finger clamp 720 is in the clamping area, it continues to clamp the seeds until it reaches the seed outlet 410 and discharges the seeds from the seed outlet 410.

[0038] When the present invention is used, the seeds are captured by the finger clamp 720 and then protected by the two finger clamps, thereby separating from the inner wall of the shell 400. Therefore, when the finger clamp 720 continues to rotate, the seeds no longer have dynamic friction with the inner wall of the shell 400, which is beneficial to protecting the seeds and reducing the friction damage they suffer, which is beneficial to improving the survival rate of the seeds.

[0039] In some embodiments, the seeds pass through the seeding opening 410 by centrifugal force. This method is a conventional setting of the finger-type seeder, does not require other components, and has a simple structure, but it requires the seeding disc 500 to have a sufficient rotation speed, otherwise insufficient centrifugal force will easily lead to seeding failure.

[0040] In other embodiments, additional equipment components can be added to assist in delivering seeds at the seeding port 410. For example, the connecting rod 730 is an elastic telescopic rod. When the finger clamp enters the seeding port 410, the length of the connecting rod 730 changes and pushes the heads of the two finger clamps out of the seeding port. In some embodiments, please refer to Figure 7 The connecting rod 730 includes a first barrel section 731, a second barrel section 732, a first spring 733 and a second spring 734. The first barrel section 731 is coaxially sleeved in the second barrel section 732. The first spring 733 is used to push the first barrel section 731 and the second barrel section 732 to move in the direction of extension of the connecting rod 730, and the second spring 734 is used to push the first barrel section 731 and the second barrel section 732 to move in the direction of shortening the connecting rod 730. The length of the first barrel section 731 and the second barrel section 732 when they are not subjected to axial external force is the equilibrium length of the connecting rod 730. Before the finger clamp 720 enters the seeding port 410, the length of the connecting rod 730 is greater than or less than the equilibrium length. When the finger clamp 720 enters the seeding port 410, the length of the connecting rod 730 is restored to the equilibrium length, thereby pushing the heads of the two finger clamps to extend out of the seeding port 410. In this way, the connecting rod 730 can be used to assist in feeding the seeds into the seed discharge port 410, which reduces the requirement for centrifugal force. At the same time, the connecting rod 730 has a certain elasticity and can be stretched, which is also convenient for adapting to seeds of different sizes and reducing damage to the seeds during the clamping process. Figure 5 As shown, the connecting rod 730 is hinged to the head of the active finger clamp 721. Before the finger clamp 720 enters the seeding port 410, the connecting rod 730 is less than the equilibrium length. When the finger clamp 720 reaches the seeding port 410, the connecting rod 730 extends to push the head of the active finger clamp 721 into the seeding port 410. Of course, the connecting rod 730 can also be hinged to the tail of the active finger clamp 721, as shown in FIG. Figure 8 As shown, the connecting rod 730 is longer than the equilibrium length before the finger clamp 720 enters the seed opening 410 . When the finger clamp 720 reaches the seed opening 410 , the connecting rod 730 contracts, thereby pushing the head of the active finger clamp 721 into the seed opening 410 .

[0041] In some embodiments, a flexible pad is provided at the portion of the head of the finger clamp 720 that clamps the seeds, to further reduce clamping damage to large-sized seeds.

[0042] In some embodiments, the roller mechanism 600 includes an annular outer ring 610, a fixed plate 620, a cover plate 630 and a duckbill 640, wherein the fixed plate 620 and the cover plate 630 are fixedly connected to the left and right side walls of the annular outer ring 610 respectively, and the fixed plate 620 is fixedly connected to the rotating drum 200; the annular outer ring 610 is slidingly connected to the annular outer wall of the shell 400; a plurality of through holes are arranged in a circular array on the annular outer ring 610, and a duckbill 640 is installed at the outlet of each through hole. When the through hole is connected to the seed discharge port 410, the finger clamp 720 is actuated to feed seeds into the duckbill 640.

[0043] The above seed discharging openings are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the embodiments of the present invention should be covered within the protection scope of the present invention.

Claims

1. A roller-type double-action finger-clamp precision seed drill, comprising a rotating shaft and a rotating drum connected in a coaxial rotation, a cam and an annular shell fixedly connected coaxially to the rotating shaft, and a roller mechanism and a seeding disk fixedly connected coaxially to the rotating drum; the roller mechanism is used to drive the seeding disk to rotate, the cam and the seeding disk are both located in the shell, and a plurality of seed-taking assemblies are arranged in an annular array on the seeding disk, a seeding port is provided on the annular side wall of the shell, and a seeding hole for replenishing seeds into the shell is provided on the shell, and the area in the shell covered with scattered seeds is called a seeding area, characterized in that Seeding components include: A paddle hinged to the seed disc in the middle; a first elastic element for pushing the paddle to rotate until it abuts against the annular outer wall of the cam; Finger clamp, the finger clamp includes two finger clamps, namely the active finger clamp and the driven finger clamp, the middle parts of the two finger clamps are hinged and the hinge point is fixed on the seed disc; a second elastic element for pushing the heads of the two finger clamps to rotate in directions away from each other; A connecting rod having one end hinged to one end of the active finger clamp and the other end hinged to one end of the paddle; Among them, during the rotation of the seed disc, the paddle rotates to continuously abut against the outer contour of the cam, thereby driving the active finger clamp to rotate. When the finger clamp buckle rotates to enter the seeding port, the driven finger clamp rotates under the action of the second elastic element, so that the head of the driven finger clamp moves in the direction away from the head of the active finger clamp, thereby completing the seed unloading operation. When the finger clamp buckle leaves the seeding port, the cam drives the active finger clamp to rotate, so that the head of the driven finger clamp extends into the shell; after the finger clamp buckle leaves the seeding port, the head and tail of the driven finger clamp both abut against the annular inner wall of the shell; when the finger clamp buckle reaches the lowest point, the distance between the heads of the two finger clamps is greater than the size of the seed, so that the seed can be taken; when the finger clamp buckle leaves the seed taking area, the cam drives the head of the active finger clamp to move in the direction close to the head of the driven finger clamp, thereby clamping the seed.

2. A roller-type double-action finger-clamp precision seeding device according to claim 1, characterized in that: After the finger clamp reaches the seeding port and the head of the driven finger clamp rotates in a direction away from the head of the active finger clamp, the seeds pass through the seeding port by relying on centrifugal force.

3. The roller-type double-action finger-clamp precision seeding device according to claim 1, characterized in that: A flexible pad is provided at the part of the head of the finger clamp that clamps the seeds.

4. The roller-type double-action finger-clamp precision seeding device according to claim 1, characterized in that: The connecting rod is an elastic telescopic rod. When the finger clamp enters the seeding port, the length of the connecting rod changes, thereby pushing the heads of the two finger clamps out of the seeding port.

5. The roller-type double-action finger-clamp precision seeding device according to claim 4, characterized in that: The connecting rod includes a first barrel section, a second barrel section, a first spring and a second spring. The first barrel section is coaxially sleeved in the second barrel section. The first spring is used to push the first barrel section and the second barrel section to move in the direction of extension of the connecting rod, and the second spring is used to push the first barrel section and the second barrel section to move in the direction of shortening the connecting rod. The length of the first barrel section and the second barrel section when they are not subjected to axial external force is the equilibrium length of the connecting rod. Before the finger clamp enters the seeding port, the length of the connecting rod is greater than or less than the equilibrium length. When the finger clamp enters the seeding port, the length of the connecting rod recovers to the equilibrium length, thereby pushing the heads of the two finger clamps out of the seeding port.

6. The roller-type double-action finger-clamp precision seeding device according to claim 5, characterized in that: The connecting rod is hinged to the head of the active finger clamp, and the length of the connecting rod is less than the balance length before the finger clamp enters the seeding port.

7. The roller-type double-action finger-clamp precision seeding device according to claim 5, characterized in that: The connecting rod is hinged to the tail of the active finger clamp, and the connecting rod is longer than the balance length before the finger clamp enters the seeding port.

8. The roller-type double-action finger-clamp precision seeding device according to claim 1, characterized in that: The roller mechanism includes an annular outer ring, a fixed plate, a cover plate and a duckbill, wherein the fixed plate and the cover plate are fixedly connected to the left and right side walls of the annular outer ring respectively, and the fixed plate is fixedly connected to the rotating drum; the annular outer ring is slidingly connected to the annular outer wall of the shell; a plurality of through holes are arranged in a circular row on the annular outer ring, and a duckbill is installed at the outlet of each through hole.

Images