CN111919556A - Anti-back-seeding finger-clamping type precision seeder - Google Patents

Abstract

The invention discloses a back-seeding prevention finger-clamping type precision seeder, which comprises a plurality of back-seeding prevention finger-clamping structures uniformly arranged on a frame disc, wherein when seeds in a seed box structure reach the inside of a fixed seed cover through a seed guide block, a wheel ring body is driven by a handle or an agricultural machine to rotate, the wheel ring body drives the frame disc to rotate, and the back-seeding prevention finger-clamping structures arranged on the frame disc are contacted with a central cam, so that the back-seeding prevention finger-clamping structures have the functions of forward seed clamping and reverse (back-seeding) protection finger-clamping control rods. The anti-back-seeding finger-clamping type precision seeder provided by the invention has the characteristics of seed saving, uniform seeding and stable plant spacing; particularly, the anti-back-seeding finger clamp structure is designed, so that the precision of the precision seeder is more stable, the reliability is greatly improved, and the service life is longer.

Description

Anti-back-seeding finger-clamping type precision seeder

Technical Field

The invention relates to the technical field of agricultural seeder machinery, in particular to a back-seeding prevention finger-clamping type precision seeder.

Background

The precision seeding refers to that crop seeds can be accurately and quantitatively sowed into soil according to set row spacing, grain spacing, sowing depth and seed number. The precision seeder has the characteristics of seed saving, uniform seeding and stable plant spacing, is convenient for intertillage weeding and field management, is beneficial to realizing agricultural automatic management and fine management, and particularly provides guarantee for the yield increase of crops in arid and semi-arid regions.

The existing finger-clamping type seeder is easy to miss seeding, rebroadcasting and even ridge breaking due to inconsistent seed sizes, thereby causing land waste and seed waste. In addition, because the existing finger-clamping type seeder is not provided with a back-seeding protection device, the finger-clamping type control rod of the existing finger-clamping type seeder is easy to misplace or even break in the seeding guiding process, so that the existing finger-clamping type seeder has poor reliability and short service life.

Accordingly, the prior art is yet to be improved and developed.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present invention provides a finger-clamping type precision seeder capable of preventing back-seeding, which aims to solve the technical problems of unstable seeding precision, poor reliability and short service life of the existing finger-clamping type seeder.

The technical scheme of the invention is as follows:

a finger-clamping type precision seeder capable of preventing back seeding is characterized by comprising a central shaft, a wheel rim body movably connected with the central shaft through a bearing, and a central cam fixedly arranged on the central shaft; a frame disc is arranged in the wheel rim body, a limiting column and a plurality of anti-back-seeding finger-clamping structures which are uniformly distributed are arranged on the frame disc, each anti-back-seeding finger-clamping structure comprises a first anti-back-seeding shifting piece, a second anti-back-seeding shifting piece which is positioned below the first anti-back-seeding shifting piece and partially overlapped with the first anti-back-seeding shifting piece, and a finger clamp which is connected with the second anti-back-seeding shifting piece through a finger-clamping operating rod; the overlapped part of the first anti-back-seeding stirring sheet and the second anti-back-seeding stirring sheet is sleeved on the limiting column and can rotate around the limiting column, a first side edge is vertically arranged on the first anti-back-seeding stirring sheet, a second side edge and a third side edge are vertically arranged on the second anti-back-seeding stirring sheet, the first side edge and the second side edge are connected through a stirring sheet reset spring, and a stop block for abutting against the third side edge is arranged on the frame disc; when the frame disc drives the anti-back-seeding finger clamp structure to rotate, the first anti-back-seeding poking piece touches the convex edge of the fixed central cam and swings.

The anti-back-seeding finger-clamping type precision seeder is characterized in that one end of a finger clamp is fixed on a frame disc through a bolt, the other end of the finger clamp is provided with a through hole, and one end of a finger clamp operating lever is inserted into the through hole; the side of the finger clamp is provided with an arc-shaped concave surface for grabbing seeds.

The anti-back-seeding finger-clamping type precision seeder is characterized in that a plurality of duckbilled seeding ports are uniformly formed in the wheel ring body, a seed guiding ring is arranged inside the wheel ring body, a plurality of seed guiding ports are uniformly formed in the seed guiding ring, and the seed guiding ports are correspondingly inserted into the duckbilled seeding ports.

The anti-back-seeding finger-clamping type precision seeder is characterized in that a seed box structure and a duckbill opener structure are respectively and fixedly arranged on the left side and the right side of the central shaft.

The anti-back-seeding finger-clamping type precision seeder comprises a seed box body, a seed guide block arranged below the seed box body, and a first handle or an agricultural machine connecting block arranged on the seed box body.

The anti-back-seeding finger-clamping type precision seeder is characterized in that a fixed seed cover fixed on a central shaft is further arranged on the inner side of the seed box body, and the fixed seed cover comprises an annular edge tightly attached to the seed guide ring and a seed cover surface which is close to the seed box body and is integrally formed with the annular edge; the annular edge is provided with the opening that is used for leading the seed to the seed guide mouth, it is fixed through the screw seed guide piece seed cover on the surface, seed cover on the surface with the position that seed guide piece corresponds is provided with the through-hole.

The anti-back-seeding finger-clamping type precision seeder is characterized in that the annular edge is provided with a seed selection ring with a step structure, and the seed selection ring is a non-closed circular ring.

Prevent that back seeding indicates double-layered smart volume disseminator, wherein, duckbilled mouth gag structure includes second handle or agricultural machinery connecting block, and fixed the setting is in mouth gag on second handle or the agricultural machinery connecting block to and evenly set up be used for controlling on the wheel rim body duckbilled seeding mouth is opened and closed duckbilled controller.

Prevent that back seeding indicates double-layered smart volume disseminator, wherein, duckbilled controller is including fixed the setting fixed block on the wheel rim body, one end through duckbilled reset spring with the duckbilled control lever that the fixed block is connected, and with the duckbilled separation blade that the duckbilled control lever other end is connected.

The anti-back-seeding finger-clamping type precision seeder is characterized in that a cover for isolating seeds is further arranged on the frame disc.

Has the advantages that: compared with the prior art, the anti-back-seeding finger-clamping type precision seeder provided by the invention comprises a plurality of anti-back-seeding finger-clamping structures uniformly arranged on the frame disc, when seeds in the seed box structure reach the inside of the fixed seed cover through the seed guide block, the wheel ring body is driven by a handle or an agricultural machine to rotate, the wheel ring body drives the frame disc to rotate, and the anti-back-seeding finger-clamping structures arranged on the frame disc are contacted with the central cam, so that the anti-back-seeding finger-clamping structures have the functions of positively clamping the seeds and reversely (back-seeding) protecting the finger-clamping control rod; the seed accessible of centre gripping takes stair structure's seed selection circle to keep the precision of centre gripping number on the finger presss from both sides, drops in the duckbilled seeding mouth via leading kind of a hole when the seed passes through seed selection circle space to realize the seeding action through the duckbilled seeding mouth that the mouth gag controlled. Therefore, the anti-back-seeding finger-clamping type precision seeder provided by the invention has the characteristics of seed saving, uniform seeding and stable plant spacing; particularly, the anti-back-seeding finger clamp structure is designed, so that the precision of the precision seeder is more stable, the reliability is greatly improved, and the service life is longer.

Drawings

Fig. 1 is a schematic view of a first explosion structure of a back-seeding prevention finger-clamping type precision seeder according to the present invention.

Fig. 2 is a schematic view of the anti-back-seeding finger-clamping structure and the central cam combination structure of the present invention.

Fig. 3 is a schematic diagram of a second explosion structure of the anti-back-seeding finger-clamping type precision seeder of the present invention.

Fig. 4 is a schematic view of a first side of a finger-clamping type precision seeder capable of preventing back-seeding according to the present invention.

Fig. 5 is a schematic view of a second side of the anti-back-seeding finger-clamping type precision seeder of the present invention.

Fig. 6 is a schematic structural diagram of a cover plate of the seed box of the present invention.

Fig. 7 is a schematic structural diagram of the seed selection ring with a stepped structure according to the present invention.

Fig. 8 is a third schematic side view of a finger-clip type precision seeder capable of preventing back-seeding according to the present invention.

Detailed Description

The present invention provides a back-seeding prevention finger-clamping type precision seeder, which is further described in detail below in order to make the purpose, technical scheme and effect of the present invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 4, the present invention provides a back-seeding prevention finger-clip type precision seeder, which comprises a central shaft 10, a rim body 20 movably connected to the central shaft 10 through a bearing, and a central cam 30 fixedly disposed on the central shaft 10; a frame disc 40 is arranged in the rim body 20, a limiting column 41 and a plurality of anti-back-seeding finger-clamping structures 50 which are uniformly distributed are arranged on the frame disc 40, each anti-back-seeding finger-clamping structure 50 comprises a first anti-back-seeding poking piece 51, a second anti-back-seeding poking piece 53 which is positioned below the first anti-back-seeding poking piece 51 and partially overlapped with the first anti-back-seeding poking piece 51, and a finger clamp 55 which is connected with the second anti-back-seeding poking piece 53 through a finger-clamping operating rod 54; the overlapped part of the first anti-reverse-seeding poking piece 51 and the second anti-reverse-seeding poking piece 53 is sleeved on the limiting column 41 and can rotate around the limiting column 41, a first side 511 is vertically arranged on the first anti-reverse-seeding poking piece 51, a second side 531 and a third side 532 are vertically arranged on the second anti-reverse-seeding poking piece 53, the first side 511 and the second side 531 are connected through a poking piece reset spring 56, and a stop block 42 for abutting against the third side 532 is arranged on the frame plate 40; when the frame plate 40 drives the anti-back-seeding finger-clamping structure 50 to rotate, the first anti-back-seeding poking piece 51 touches the raised edge 31 of the fixed central cam 30 and swings.

In the present embodiment, when the wheel rim body 20 is rotated forward by an external force, i.e. sowing seeds in a forward direction, the rim body 20 drives the shelf plate 40 to rotate in a forward direction, and at this time, the anti-back-seeding finger-clamping structure 50 mounted on the shelf plate 40 rotates in a forward direction around the central cam 30, when the first anti-back-seeding paddle 51 makes a positive contact with the convex edge 31 of the central cam 30, at this time, the first anti-back-seeding toggle piece 51 drives the second anti-back-seeding toggle piece 53 to swing counterclockwise together with the bolt 52 as the center, namely, the first anti-back-seeding toggle piece 51 and the second anti-back-seeding toggle piece 53 do not move relatively, the second anti-back-seeding piece 53 opens the finger clamp 55 through the support operating lever 54 in the swinging process and completes the clamping and seed taking actions, and the seeds clamped by the finger clamp 55 finally fall into the duckbilled seeding opening to wait for seeding; when the rim body 20 rotates backwards under the action of an external force, that is, when sowing is performed in a reverse direction (back sowing), the rim body 20 drives the frame plate 40 to rotate in a reverse direction, at this time, the anti-back-sowing finger-clamping structure 50 installed on the frame plate 40 rotates around the central cam 30 in a reverse direction, when the first anti-back-sowing poking piece 51 contacts with the protruding edge 31 of the central cam 30 in a reverse direction, the first anti-back-sowing poking piece 51 swings clockwise around the bolt 52, at this time, the stopper 42 abuts against the third edge 532 of the second anti-back-sowing poking piece 53, so that the first anti-back-sowing poking piece 51 cannot drive the second anti-back-sowing poking piece to swing together, and at this time, the finger-clamping lever cannot open the finger clamp 55 to complete the seed clamping and fetching action. In this embodiment, the first anti-reverse-seeding paddle 51 swings and then returns to the initial position under the action of the paddle return spring 56.

The anti-back-seeding finger-clamping type precision seeder provided by the embodiment has the characteristics of seed saving, uniform seeding and stable plant spacing; particularly, the anti-back-seeding finger clamp structure is designed, so that the precision of the precision seeder is more stable, the reliability is greatly improved, and the service life is longer.

In some embodiments, as shown in fig. 2, the second anti-reverse-playing paddle 53 is an L-shaped paddle, the second side 531 is perpendicularly disposed on the outer side of the short side of the L-shaped paddle, the third side 532 is perpendicularly disposed on the outer side of the long side of the L-shaped paddle and at the end far away from the short side, a slot is disposed at the end of the third side 532 close to the short side, and a first through hole connected to the finger-clip lever 54 is further disposed on the long side of the L-shaped paddle; the first anti-reverse-seeding push piece 51 is located between the second side 531 and the third side 532, and one end of the first anti-reverse-seeding push piece 51 is inserted into the slot; the first side 511 is disposed at an end of the first anti-back-seeding paddle 51 close to the central cam 30.

In some embodiments, as shown in fig. 2, one end of the finger clamp 55 is fixed on the frame plate 40 by a bolt, the other end of the finger clamp 55 is provided with a second through hole, and one end of the finger clamp operating lever 54 is inserted into the second through hole; the side of the finger clamp 55 becomes to be provided with an arc-shaped concave surface 552 for grabbing seeds, and the arc-shaped concave surface 552 facilitates stable grabbing of seeds.

In some embodiments, as shown in fig. 1 to 4, a plurality of duckbill seeding holes 21 are uniformly formed on the rim body 20, a seed guiding ring 22 is arranged inside the rim body 20, a plurality of seed guiding holes 23 are uniformly formed on the seed guiding ring 22, and the seed guiding holes 23 are inserted into the duckbill seeding holes 21 in a one-to-one correspondence manner. In this embodiment, the number of seed introduction ports 23 is the same as the number of duckbill sowing ports 21. In some embodiments, the number of the duckbill sowing openings is 6 to 12, but is not limited thereto.

In some embodiments, as shown in fig. 1-6, a seed box structure 60 and a duckbill opener structure 70 are fixedly disposed on the left and right sides of the central shaft 10, respectively. The seed box structure 60 comprises a seed box body 61 for storing seeds, a seed guide block 62 arranged below the seed box body 61, and a first handle or an agricultural machine connecting block 63 arranged on the seed box body 61; the inner side of the seed box body 61 is also provided with a seed fixing cover 80 fixed on a central shaft, and the seed fixing cover 80 comprises an annular edge 81 closely attached to the seed guiding ring 22 and a seed cover surface 82 which is close to the seed box body 61 and is integrally formed with the annular edge 81; the annular edge 81 is provided with an opening 83 for guiding seeds to the seed guiding opening 23, the seed guiding block 62 is fixed on the seed covering surface 82 through a screw, and a through hole 84 is arranged on the seed covering surface 82 at a position corresponding to the seed guiding block 62.

Specifically, as shown in fig. 1 and 5, a seed cover side cover plate 201 and a mouth-gag side cover plate 202 are respectively installed on both sides of the rim body 20, and the seed cover side cover plate 201 and the mouth-gag side cover plate 202 are used to close both sides of the rim body 20 to form an inner closed space. Seeds stored in the seed container body pass along the seed guide block 62 and the seed through holes 84 on the seed cover surface 82 into the space formed by the fixed seed cover 80 and the shelf plate 40.

In some embodiments, as shown in fig. 7, the annular edge 81 of the seed fixing cover 80 is provided with a seed selection ring 90 with a step structure 91, the seed selection ring 90 is a non-closed circular ring, that is, there is a gap at both ends of the seed selection ring 90, and the gap can allow seeds to fall into the seed introduction port 23. By way of example, two step structures 91 are provided on the seed ring 90.

Specifically, when the anti-back-seeding finger-clamping type precision seeder seeds in the forward direction, the second anti-back-seeding piece 53 opens the finger clamp 55 through the support operating rod 54 during the swinging process and completes the clamping and seed taking action, the finger clamp 55 slides relative to the fixed seed selection ring 90 with the step structure 91 under the driving of the support disc, and the step structure on the seed selection ring 90 can screen off the excess seeds clamped by the finger clamp 55, so that the finger clamp 55 clamps a fixed number of seeds and enters the seed guiding opening 23 through the gap of the seed selection ring 90, and finally falls into the duckbill seeding opening 21 to wait for seeding.

In some embodiments, as shown in fig. 5 and 8, the duckbill opener structure 70 includes a second handle or agricultural connecting block 71, a opener body 72 fixedly disposed on the second handle or agricultural connecting block, and a duckbill manipulator 73 uniformly disposed on the rim body 20 for controlling the opening and closing of the duckbill sowing opening 21. The duckbill manipulator 73 includes a fixed block 74 fixedly disposed on the rim body 20, a duckbill operating lever 76 having one end connected to the fixed block 74 through a duckbill return spring 75, and a duckbill stopper 77 connected to the other end of the duckbill operating lever 76.

Specifically, the number of the duckbill manipulators 73 is the same as that of the duckbill sowing openings 21, when the wheel rim body drives the duckbill operating rod 76 to move to the position of the mouth gag body 72, the mouth gag body 72 shifts the duckbill operating rod 76, and the duckbill operating rod 76 drives the duckbill blocking plate 77 to move in a direction away from the duckbill sowing openings, so that the duckbill sowing openings 21 are opened for sowing; when the wheel rim body drives the duckbill operating rod 76 to rotate to pass through the position of the mouth gag body 72, the duckbill operating rod 76 resets under the action of the duckbill reset spring 75, and the duckbill operating rod 76 drives the duckbill separation blade 77 to move towards the direction close to the duckbill sowing port 21 in the resetting process, so that the duckbill sowing port 21 is closed.

In some embodiments, the number of the duckbill sowing openings 21 is 6 to 12, but is not limited thereto. By way of example, as shown in fig. 1, the number of duckbill sowing openings 21 is 7.

In some embodiments, as shown in fig. 1, a cover 100 for isolating the seeds is further disposed on the frame plate 40, the cover 100 covers the central cam and the first and second anti-back-seeding paddles, such that the cover 100 can prevent seeds from entering the gap between the anti-back-seeding paddles and the central cam to cause seeding failure, and a gap is disposed at the bottom of the cover 100 for allowing the finger lever 54 to reciprocate through the finger lever 54.

The anti-back-seeding finger-clamping type precision seeder of the invention is further explained by the following specific embodiment:

example 1

Agricultural machine seeding

The agricultural machinery connecting rod is inserted into the handles at the left side and the right side or the agricultural machinery connecting block, and the movement of the agricultural machinery drives the wheel ring body to rotate. When the seeds are sowed in the forward direction, a back-seeding prevention finger-clamp structure arranged on a rotating frame disc rotates around a central cam, when a first back-seeding prevention shifting piece touches a convex edge of the central cam in the forward direction, the first back-seeding prevention shifting piece drives a second back-seeding prevention shifting piece to swing anticlockwise together by taking a bolt as the center, namely the first back-seeding prevention shifting piece and the second back-seeding prevention shifting piece do not move relatively, the second back-seeding prevention shifting piece opens a finger clamp through a frame control rod in the swinging process and finishes clamping and seed taking actions, the finger clamp is driven by the frame disc to continuously slide relative to a fixed seed selection ring with a step structure, and the step structure on the seed selection ring can screen off the excess clamping seeds of the finger clamp so that the excess clamping seeds with the fixed number enter a seed guide port through a gap of the seed selection ring, finally dropping the duck bill seeding port to wait for seeding; the anti-back-seeding finger-clamping type precision seeder is characterized in that the anti-back-seeding finger-clamping type precision seeder is arranged outside the wheel ring body drives the duckbill control rod to move to the position of the mouth gag body, the mouth gag body is stirred with the duckbill control rod, the duckbill control rod drives the duckbill separation blade to move in the direction away from the duckbill seeding port, and therefore the duckbill seeding port is opened for seeding. Work as the wheel rim body drives the duckbilled control rod passes through during opener body position, the duckbilled control rod is in reset under duckbilled reset spring's the effect, the duckbilled control rod drives at the in-process that resets the duckbilled separation blade is to being close to the direction motion of duckbilled seeding mouth, thereby close duckbilled seeding mouth. When the wheel ring body rotates backwards under the action of external force, namely, the seeding is reversely performed (back seeding), the wheel ring body drives the frame disc to reversely rotate, at the moment, the back seeding prevention finger-clamping structure arranged on the frame disc reversely rotates around the central cam, when the first back seeding prevention shifting piece reversely touches the convex edge of the central cam, the first back seeding prevention shifting piece clockwise swings around the bolt, at the moment, the stop block abuts against the third side edge of the second back seeding prevention shifting piece, so that the first back seeding prevention shifting piece cannot drive the second back seeding prevention shifting piece to swing together, and at the moment, the finger-clamping control lever cannot open the finger-clamping to complete the seed clamping and taking action.

Example 2

Hand-held seeding

The handles are inserted into the handles on the left side and the right side or the agricultural machinery connecting block, and the handles are pushed, so that the wheel rim body rotates. When the forward seeding, inside preventing that the back-seeding indicates the double-layered smart disseminator, the back-seeding prevention who installs on the rotatory frame dish indicates the clamp device to rotate around central cam, two prevent that the back-seeding plectrum does not take place relative motion, and by central cam jack-up, drive and indicate the clamp control lever to open and indicate the clamp and accomplish the centre gripping action of getting kind, the seed of centre gripping is used for sifting unnecessary seed through leading the seed circle and installing the seed selection circle of taking the stair structure, and get into through seed selection circle space and lead the kind of a hole, finally drop to wait to sow in the duckbilled. When the duckbill control rod rotates to the position of the mouth gag body, the mouth gag shifts the duckbill control rod to control the duckbill to be opened outside the anti-back-seeding finger-clamping type precision seeder; when the duckbill operating rod rotates to pass through the position of the mouth gag body, the duckbill operating rod resets under the action of the duckbill retracting return spring, so that the duckbill is closed. When the back seeding prevention finger-clamping type precision seeder is used for back seeding prevention, the back seeding prevention finger-clamping device arranged on the rotating frame disc rotates around the central cam, the two back seeding prevention shifting pieces move relatively, and the central cam cannot drive the finger-clamping control rod through the back seeding prevention shifting pieces. The above is the case when the hand-held anti-back-seeding fixing chuck is not installed. When the hand-held anti-back-seeding fixing chuck fixedly connected to the mouth gag body in the modes of clamping teeth, screws and the like is installed, the anti-back-seeding finger-clamping type precision seeder cannot be inverted.

In conclusion, the anti-back-seeding finger-clamping type precision seeder provided by the invention comprises a plurality of anti-back-seeding finger-clamping structures uniformly arranged on the frame disc, when seeds in the seed box structure reach the inside of the fixed seed cover through the seed guide block, the wheel ring body is driven by a handle or an agricultural machine to rotate, the wheel ring body drives the frame disc to rotate, and the anti-back-seeding finger-clamping structures arranged on the frame disc are contacted with the central cam, so that the anti-back-seeding finger-clamping structures have the functions of positively clamping the seeds and reversely (back-seeding) protecting the finger-clamping control rod; the seed accessible of centre gripping takes stair structure's seed selection circle to keep the precision of centre gripping number on the finger presss from both sides, drops in the duckbilled seeding mouth via leading kind of a hole when the seed passes through seed selection circle space to realize the seeding action through the duckbilled seeding mouth that the mouth gag controlled. Therefore, the anti-back-seeding finger-clamping type precision seeder provided by the invention has the characteristics of seed saving, uniform seeding and stable plant spacing; particularly, the anti-back-seeding finger clamp structure is designed, so that the precision of the precision seeder is more stable, the reliability is greatly improved, and the service life is longer.

It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.

Claims (10)

1. A finger-clamping type precision seeder capable of preventing back seeding is characterized by comprising a central shaft, a wheel rim body movably connected with the central shaft through a bearing, and a central cam fixedly arranged on the central shaft; a frame disc is arranged in the wheel rim body, a limiting column and a plurality of anti-back-seeding finger-clamping structures which are uniformly distributed are arranged on the frame disc, each anti-back-seeding finger-clamping structure comprises a first anti-back-seeding shifting piece, a second anti-back-seeding shifting piece which is positioned below the first anti-back-seeding shifting piece and partially overlapped with the first anti-back-seeding shifting piece, and a finger clamp which is connected with the second anti-back-seeding shifting piece through a finger-clamping operating rod; the overlapped part of the first anti-back-seeding stirring sheet and the second anti-back-seeding stirring sheet is sleeved on the limiting column and can rotate around the limiting column, a first side edge is vertically arranged on the first anti-back-seeding stirring sheet, a second side edge and a third side edge are vertically arranged on the second anti-back-seeding stirring sheet, the first side edge and the second side edge are connected through a stirring sheet reset spring, and a stop block for abutting against the third side edge is arranged on the frame disc; when the frame disc drives the anti-back-seeding finger clamp structure to rotate, the first anti-back-seeding poking piece touches the convex edge of the fixed central cam and swings.

2. The anti-back-seeding finger-clamping type precision seeder according to claim 1, wherein one end of the finger clamp is fixed on a frame disc through a bolt, the other end of the finger clamp is provided with a through hole, and one end of the finger-clamp operating lever is inserted into the through hole; the side of the finger clamp is provided with an arc-shaped concave surface for grabbing seeds.

3. The anti-back-seeding finger-clip type precision seeder according to claim 1, wherein a plurality of duckbill seeding holes are uniformly arranged on the wheel ring body, a seed guiding ring is arranged inside the wheel ring body, a plurality of seed guiding holes are uniformly arranged on the seed guiding ring, and the seed guiding holes are correspondingly inserted into the duckbill seeding holes.

4. The anti-back-seeding finger-clip type precision seeder according to claim 3, wherein a seed box structure and a duckbill opener structure are respectively fixedly arranged on the left side and the right side of the central shaft.

5. The anti-back-seeding finger-clip type precision seeder according to claim 4, wherein the seed box structure comprises a seed box body, a seed guide block arranged below the seed box body, and a first handle or an agricultural machine connecting block arranged on the seed box body.

6. The anti-back-seeding finger-clip type precision seeder according to claim 5, wherein the inside of the seed box body is further provided with a seed fixing cover fixed on the central shaft, the seed fixing cover comprises an annular edge arranged to be closely attached to the seed guiding ring and a seed cover surface adjacent to the seed box body and integrally formed with the annular edge; the annular edge is provided with the opening that is used for leading the seed to the seed guide mouth, it is fixed through the screw seed guide piece seed cover on the surface, seed cover on the surface with the position that seed guide piece corresponds is provided with the through-hole.

7. The anti-back-seeding finger-clip type precision seeder according to claim 6, wherein the annular edge is provided with a seed selection ring with a step structure, and the seed selection ring is an unclosed circular ring.

8. The anti-back-seeding finger-clip type precision seeder according to claim 4, wherein the duckbill opener structure comprises a second handle or an agricultural machine connecting block, a mouth opener fixedly arranged on the second handle or the agricultural machine connecting block, and a duckbill manipulator uniformly arranged on the wheel rim body for controlling the opening and closing of the duckbill seeding opening.

9. The anti-back-seeding finger-clip type precision seeder according to claim 8, wherein the duckbill manipulator comprises a fixed block fixedly arranged on the wheel rim body, a duckbill operating rod having one end connected with the fixed block through a duckbill return spring, and a duckbill catch connected with the other end of the duckbill operating rod.

10. The anti-back-seeding finger-clip type precision seeder according to claim 1, wherein the frame disc is further provided with a cover for isolating seeds.

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