Centrifugal seed uniformizing-double-hole interaction type corn plot precision seed sowing device

Abstract

The invention relates to a centrifugal seed uniformizing-double-hole interaction type corn plot precision seed-metering device which comprises a seed-metering device front shell, a hole rotating disc, a suction hole disc, a fixed disc, a tooth type seed conveying wheel, a driving shaft, a connecting key, a seed-metering device rear shell, a fixed pin shaft, a ridge shaft, a driving gear and a centrifugal wheel. The hole rotating disc, the suction hole disc, the fixed disc and the centrifugal wheel jointly form a centrifugal seed distribution-double-hole interaction seed cavity seed filling area, the hole rotating disc, the fixed disc and the suction hole disc are coaxially mounted, the hole rotating disc and the tooth type seed conveying wheel are fixedly connected and synchronously rotate, and the suction hole disc is fixed; the seed-metering device adopts a double-shaft driving mode, a driving shaft and a ridge shaft are independently installed and do not influence each other, a driving gear is installed on the driving shaft and meshed with an inner gear ring of a tooth type seed conveying wheel, and a centrifugal wheel is installed on the ridge shaft. According to the invention, a centrifugal seed uniformizing-composite seed filling mode is adopted, disorderly stacked corn seeds move orderly, and the airflow suction holes act on corns together, so that the seed filling effect is improved.

Description

Technical Field

[0001] The invention belongs to the field of agricultural machinery, and in particular relates to a centrifugal seed leveling-double-hole interactive type corn plot precision seed metering device. Background Art

[0003] Currently, precision seeding in corn plots is mainly done by manual labor, and mechanized seeding develops slowly. The main reasons are the single type of precision seeders in corn plots, poor seed filling effects, and high leakage rates. Summary of the invention

[0004] In view of the problems of single type, poor seed filling effect and high leakage rate of corn plot precision seeding devices, the present invention provides a centrifugal seed uniforming-double-hole interactive type corn plot precision seeding device, which can effectively improve the seed filling effect of the seeding device and ensure the single-grain effect.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a centrifugal seed-uniforming-double-hole interactive type corn plot precision seeding device, including a front shell of the seeding device, a profile hole rotating disk, a suction hole disk, a fixed disk, a toothed seed transport wheel, a driving shaft, a connecting key, a rear shell of the seeding device, a fixed pin shaft, a prism shaft, a driving gear, and a centrifugal wheel; the profile hole rotating disk can rotate around the center, and is composed of a rotating disk ring, a profile hole and a disturbance finger; the suction hole disk is fixed around the center, and is composed of a notched ring and a curved groove suction hole; the fixed disk is fixed around the center, and is composed of a fixed disk base, a fixed hole, a right side arc plate, a prism shaft hole, a left lower straight plate, and a left upper arc plate; the toothed seed transport wheel can rotate around the center, and is composed of a toothed seed transport wheel base, a seed transport groove, a card slot, The centrifugal wheel is composed of an inner gear ring; the centrifugal wheel is composed of a centrifugal wheel base and centrifugal blades; the seed metering device is installed on a fixed pin shaft through a fixing hole of a fixed disk, and is used for fixed support of the entire seed metering device; the profile hole rotating disk, the suction hole disk, the fixed disk, and the centrifugal wheel together constitute a centrifugal seed separation-double hole interactive seed cavity filling area; the seed inlet on the front shell of the seed metering device is located above the centrifugal wheel to guide the corn seeds into the centrifugal wheel; the fixed disk, the suction hole disk, and the profile hole rotating disk are coaxially installed, the profile hole rotating disk is installed on the outside of the fixed disk base, and the suction hole disk is placed on the stepped circle on the back of the rotating disk ring of the profile hole rotating disk; the curved groove type suction hole of the suction hole disk corresponds to the negative pressure suction chamber position of the rear shell of the seed metering device, and the negative pressure suction chamber of the rear shell of the seed metering device The pressure suction chamber is connected to the negative pressure fan through an air flow duct; the suction hole plate is fixed on the rear shell of the seed metering device by screws; the profile hole rotating disk and the geared seed transport wheel are fixedly connected, and the two rotate synchronously; the seed metering device changes the traditional central drive mode, the driving shaft and the prism shaft are installed separately and do not affect each other, the driving gear is installed on the driving shaft, and the centrifugal wheel is installed on the prism shaft; the driving shaft is externally connected to a driving mechanism, and the driving gear is installed on the driving shaft. The rotation of the driving shaft drives the driving gear, and then drives the geared seed transport wheel to rotate, and also drives the profile hole rotating disk to rotate, while the suction hole plate is fixed and does not rotate; the prism shaft is externally connected to another set of driving structures, which can drive the centrifugal wheel to rotate; the rotation speed of the profile hole rotating disk and the rotation speed of the centrifugal wheel cooperate with each other, so When the shaped hole on the shaped hole rotating disk just contacts the left side of the curved groove type suction hole on the suction hole disk, the blades of the centrifugal wheel just rotate over the left side of the curved groove type suction hole on the suction hole disk; when the seed meter is working, the corn seeds enter the centrifugal wheel through the seed inlet on the front shell of the seed meter; due to the rotation of the centrifugal wheel, the centrifugal blades will drive the corn to rotate and then disperse along the blades; when the centrifugal wheel rotates to the lower notch, due to the lack of the constraint of the arc plate, the corn seeds are centrifugally thrown out; when the thrown corn passes through the suction hole disk, the corn seeds will be adsorbed due to the negative pressure suction of the curved groove type suction hole; when the shaped hole of the shaped hole rotating disk passes through the curved groove type suction hole, the corn seeds are just adsorbed within the area trajectory range of the shaped hole rotation, thereby completing the seed filling;If the corn seeds are not absorbed by the negative pressure airflow of the curved groove suction hole and fall to the bottom of the front shell of the seed metering device, the corn seeds will flow to the shaped hole under the disturbance finger movement and tilt guidance of the shaped hole rotating disk, and the curved groove suction hole and the shaped hole will interact synchronously, thereby promoting seed filling; after the seed filling is completed, the corn seeds rotate to the top and fall into the seed transport groove of the toothed seed transport wheel to complete the subsequent seeding operation. ;

[0006] The rotating disk ring of the hole-forming rotating disk is stepped, with 8 holes evenly distributed around the outermost circle. The holes rotate to form a semi-closed area with the front shell of the seed meter. A disturbance finger is arranged on the front end top of each hole. The disturbance finger is along the tangent direction of the hole and forms a certain angle with the plane where the top of the hole is located. It can move and guide the corn seeds to move toward the hole, so as to avoid the corn scattered at the bottom of the front shell of the seed meter from being unable to be filled.

[0007] The upper and lower heights of the curved groove suction holes of the suction hole plate cover the entire area of ​​the profile hole of the profile hole rotating plate, and the left and right range can cover the left and right offset distance of the corn movement after centrifugation; in order to ensure that the corn does not fall on the bottom of the seed metering device after centrifugation as much as possible and can be adsorbed within the trajectory range of the profile hole movement, the center line of the curved groove suction hole needs to be fitted according to the actual landing point of the corn after centrifugation.

[0008] The left lower straight plate and the left upper guard plate of the fixed disk together constitute a left arc plate, and the left arc plate and the right arc plate are respectively installed on the left and right sides of the centrifugal wheel to prevent corn seeds from spreading around; the upper notch angle formed by the left arc plate and the right arc plate is 80°, which is used to receive corn seeds and fall into the centrifugal wheel; the lower notch angle formed by the left arc plate and the right arc plate is 35°, which is used for corn seeds to fly out under the action of the centrifugal wheel; the upper notch and the lower notch formed by the left arc plate and the right arc plate are 150° apart from each other, in this case, it can ensure that the seeds fully enter the centrifugal wheel and can ensure that the seeds are fully dispersed in the centrifugal wheel, and then the corn after centrifugation moves and is adsorbed by the airflow; the left lower straight plate cooperates with the shaped hole to prevent the corn after centrifugation from being thrown to the bottom of the front shell of the seed metering device away from the seed filling area.

[0009] The clamping groove of the toothed seed transport wheel cooperates with the protrusion of the rear shell of the seed metering device to assist in fixing the entire seed metering device and prevent the instability of the fixing pin shaft.

[0010] The centrifugal blades of the centrifugal wheel are evenly distributed around the circumference of the centrifugal wheel base, and the number is 5; in order to achieve smooth centrifugal movement and flying out of corn and prevent corn seeds from being carried away and difficult to fall, the centrifugal blades are curved.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The present invention adopts a centrifugal method, and uses centrifugal blades to make the disordered corn seeds move in an orderly manner to improve the probability of seed adsorption; the present invention adopts an air-shaped hole-disturbance finger assisted seed filling method, and the air force and the shaped hole work together to quickly fill the seeds, and the curved groove suction hole can expand the adsorption area to adsorb the centrifugal corn seeds as much as possible, and the disturbance finger assists in guiding the corn seeds that fall to the bottom to the shaped hole, thereby improving the seed filling effect; the present invention changes the traditional center single drive method and adopts a dual drive method, and the centrifugal wheel and the shaped hole rotating disk rotate independently, which can better innovate and optimize the precision seed metering device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the composition and structure of a centrifugal seed leveling-double-hole interactive type corn plot precision seed metering device of the present invention; Figure 2 It is a structural schematic diagram of a centrifugal seed division-double-hole interaction seed cavity seed filling area of ​​a centrifugal seed uniformity-double-hole interaction type corn plot precision seed metering device of the present invention; Figure 3 It is a structural schematic diagram of a hole-shaped rotating disk of a centrifugal seed-leveling-double-hole interactive type corn plot precision seed metering device of the present invention; Figure 4 It is a structural schematic diagram of a centrifugal seed leveling-double-hole interactive type corn plot precision seed metering device of the present invention; Figure 5 It is a structural schematic diagram of a fixed disk of a centrifugal seed leveling-double-hole interactive type corn plot precision seed metering device of the present invention; Figure 6 It is a structural schematic diagram of a toothed seed transport wheel of a centrifugal seed leveling-double-hole interactive type corn plot precision seed metering device of the present invention; Figure 7 The invention discloses a schematic structural diagram of a centrifugal wheel of a centrifugal seed leveling and double-hole interactive type corn plot precision seed metering device.

[0013] Wherein, the accompanying drawings are marked as follows: 1- front housing of the seed meter 2- rotating plate with holes 3- suction plate 4- fixed plate 5- toothed seed transport wheel 6- driving shaft 7- connecting key 8- rear housing of the seed meter 9- fixed pin 10- prism shaft 11- driving gear 12- centrifugal wheel; 201- rotating disk ring 202- mold hole 203- disturbance finger; 301- notched ring 302- curved groove suction hole; 401-fixed plate base 402-fixed hole 403-right side arc plate 404-prism axis hole 405-left side lower straight plate 406-left side upper arc plate; 501-toothed seed transport wheel base 502-seed transport groove 503-slot 504-inner gear ring; 1201 - centrifugal wheel base 1202 - centrifugal wheel blades.

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] like Figure 1 and Figure 2 As shown, a centrifugal seed-uniforming-double-hole interactive corn plot precision seeding device comprises a seeding device front housing 1, a hole-shaped rotating disk 2, a suction hole disk 3, a fixed disk 4, a toothed seed transport wheel 5, a driving shaft 6, a connecting key 7, a seeding device rear housing 8, a fixed pin shaft 9, a prism shaft 10, a driving gear 11, and a centrifugal wheel 12; the hole-shaped rotating disk 2, the suction hole disk 3, the fixed disk 4, and the centrifugal wheel 12 together constitute a centrifugal seed-uniforming-double-hole interactive seed cavity filling area, and the hole-shaped rotating disk 2, the fixed disk 4, and the suction hole disk 3 are coaxially installed; the hole-shaped rotating disk 2 and the toothed seed transport wheel 5 are fixed The two rotate synchronously; the seed metering device changes the traditional central drive mode, the driving shaft 6 and the prism shaft 10 are installed separately and do not affect each other, the driving gear 11 is installed on the driving shaft 6, and the centrifugal wheel 12 is installed on the prism shaft 10; the driving shaft 6 is externally connected to a driving mechanism, and the driving gear 11 is installed on the driving shaft 6. The rotation of the driving shaft 6 drives the driving gear 11, and then drives the geared seed transport wheel 5 to rotate, and also drives the hole rotating disk 2 to rotate, while the suction hole disk 3 is fixed and does not rotate; the prism shaft 10 is externally connected to another set of driving structures, which can drive the centrifugal wheel 12 to rotate.

[0016] like Figure 3-7 As shown, the hole rotating disk 2 can rotate around the center, and is composed of a rotating disk ring 201, a hole 202 and a disturbance finger 203; the hole suction disk 3 is fixed around the center, and is composed of a notched ring 301 and a curved groove type suction hole 302; the fixed disk 4 is fixed around the center, and is composed of a fixed disk base 401, a fixed hole 402, a right side arc plate 403, a prism hole 404, a left lower straight plate 405, and a left upper arc plate 406; the geared seed transport wheel 5 rotates around the center, and is composed of a geared seed transport wheel base 501, a seed transport groove 502, a clamping groove 503, and an inner gear ring 504; the centrifugal wheel 12 is composed of a centrifugal wheel base 1201 and centrifugal blades 1202.

[0017] The seed metering device is installed on the fixed pin shaft 9 through the fixing hole 402 of the fixed disk 4, which is used for the fixed support of the entire seed metering device; the seed inlet on the front shell 1 of the seed metering device is located above the centrifugal wheel 12, guiding the corn seeds into the centrifugal wheel 12; the fixed disk 4, the suction hole disk 3, and the hole rotating disk 2 are coaxially installed, the hole rotating disk 2 is installed on the outside of the fixed disk base 401, and the suction hole disk 3 is placed on the stepped circle on the back of the rotating disk ring 201 of the hole rotating disk 2; the curved groove suction holes of the suction hole disk 3 302 corresponds to the position of the negative pressure suction chamber of the rear shell 8 of the seed metering device, and the negative pressure suction chamber of the rear shell 8 of the seed metering device is connected to the negative pressure fan through an air flow duct; the suction hole plate 3 is installed on the rear shell 8 of the seed metering device by screws and is fixed; the rotation speed of the profile hole rotating plate 2 and the rotation speed of the centrifugal wheel 12 cooperate with each other, and when the profile hole 202 on the profile hole rotating plate 2 just contacts the left side of the curved groove type suction hole 302 on the suction hole plate 3, the centrifugal blade 1202 of the centrifugal wheel 12 just rotates over the left side of the curved groove type suction hole 302 on the suction hole plate 3.

[0018] When the seed metering device is working, corn seeds enter the centrifugal wheel 12 through the seed inlet on the front shell 1 of the seed metering device; due to the rotation of the centrifugal wheel 12, the centrifugal blades 1202 will drive the corn to rotate and then disperse along the blades; when the centrifugal blades 1202 rotate to the lower notch, the corn seeds are centrifugally thrown out due to the lack of the constraint of the arc plate; when the thrown corn passes through the suction hole plate 3, the corn seeds will be adsorbed due to the negative pressure suction of the curved groove type suction hole 302; when the shaped hole 202 of the shaped hole rotating disk 2 passes through the curved groove type suction hole 302, the corn seeds are The best position to be adsorbed is within the trajectory range of the rotating area of ​​the shaped hole 202, thereby completing the seed filling; if the corn seeds are not adsorbed by the negative pressure airflow of the curved groove type suction hole 302, and fall into the bottom of the front shell 1 of the seed metering device, under the action of the disturbance finger 203 rotating and tilting and guiding the rotating disk 2 of the shaped hole, the corn seeds flow toward the shaped hole 202, and synchronously interact with the curved groove type suction hole 302 and the shaped hole 202, thereby promoting the seed filling; after the seed filling is completed, the corn seeds rotate to the top and fall into the seed transport groove 502 of the toothed seed transport wheel 5, completing the subsequent seeding operation.

[0019] The rotating disk ring 201 of the hole rotating disk 2 is stepped, and 8 holes 202 are evenly distributed around the outermost circle. A disturbance finger 203 is set at the top of the front end of each hole 202. The disturbance finger 203 is along the tangent direction of the hole 202 and forms an angle of 20~50° with the plane where the top of the hole 202 is located.

[0020] The upper and lower heights of the curved groove suction hole 302 of the suction hole plate 3 cover the entire area of ​​the profile hole 202 of the profile hole rotating plate 2; in order to ensure that the corn after centrifugation does not fall on the bottom of the seed metering device and can be adsorbed within the trajectory range of the profile hole 202, the center line fitting formula of the curved groove suction hole 302 is: y =-7E-05 x 5 +0.0078 x 4 -0.342 x 3 +7.4467 x 2 -80.849 x +452.68.

[0021] The left lower straight plate 405 and the left upper guard plate 406 of the fixed disk 4 together form a left arc plate, and the left arc plate and the right arc plate 403 are respectively installed on the left and right sides of the centrifugal wheel 12 to prevent corn seeds from spreading around; the upper notch angle formed by the left upper guard plate 406 and the right arc plate 403 is 80°, which is used to receive corn seeds and fall into the centrifugal wheel 12; the lower notch angle formed by the left lower straight plate 405 and the right arc plate 403 is 35°, which is used for corn seeds to fly out under the action of the centrifugal wheel 12; the upper notch and the lower notch formed by the left upper guard plate 406, the left lower straight plate 405 and the right arc plate 403 are 150°, which can ensure that the seeds can fully enter the centrifugal wheel 12 and can ensure that the seeds are fully dispersed in the centrifugal wheel 12, so that the corn movement after centrifugation is adsorbed by the airflow; the left lower straight plate 405 cooperates with the shaped hole 202 to prevent the corn after centrifugation from being thrown to the bottom of the front shell 1 of the seed metering device away from the seed filling area.

[0022] The slot 503 of the toothed seed transport wheel 5 cooperates with the protrusion of the rear housing 8 of the seed metering device to assist in fixing the entire seed metering device and prevent the fixing pin 9 from being unstable.

[0023] The centrifugal blades 1202 of the centrifugal wheel 12 are evenly distributed around the circumference of the centrifugal wheel base 1201, and the number is 5; in order to achieve smooth centrifugal movement and flying out of corn and prevent corn seeds from being carried away and difficult to fall, the centrifugal blades 1202 are curved, and the outer curve fitting formula of the centrifugal blades 1202 is: y =-0.0146 x 2 +1.0518 x +12.307.

[0024] Finally, it should be pointed out that: although the above examples have described the best specific implementation of the present invention, the scope of protection of the present invention is not limited to the above description. It can be understood by those skilled in the art that any modifications and changes fall within the scope of protection of the present invention without departing from the essence and spirit taught by the present invention.

Claims

1. A centrifugal seed-leveling and double-hole interactive corn plot precision seed meter, comprising a seed meter front housing (1), a hole-shaped rotating disk (2), a suction hole disk (3), a fixed disk (4), a toothed seed transport wheel (5), a driving shaft (6), a connecting key (7), a seed meter rear housing (8), a fixed pin shaft (9), a prism shaft (10), a driving gear (11), and a centrifugal wheel (12); the hole-shaped rotating disk (2), the suction hole disk (3), the fixed disk (4), and the centrifugal wheel (12) together constitute a centrifugal seed-leveling and double-hole interactive seed cavity filling area; the hole-shaped rotating disk (2), the fixed disk (4), and the suction hole disk (3) are coaxially mounted; the hole-shaped rotating disk (2) and the toothed seed transport wheel (5) The two drive shafts (6) and (10) are fixedly connected and rotate synchronously, while the suction hole disk is fixed; the seed metering device changes the traditional central drive mode, and the driving shaft (6) and the prism shaft (10) are installed separately and do not affect each other, the driving gear (11) is installed on the driving shaft (6), and the centrifugal wheel (12) is installed on the prism shaft (10); the driving shaft (6) is externally connected to a driving mechanism, and the driving gear (11) is installed on the driving shaft (6); the driving shaft (6) rotates to drive the driving gear (11), thereby driving the geared seed transport wheel (5) to rotate, and also drives the hole rotating disk (2) to rotate, while the suction hole disk (3) is fixed and does not rotate; the prism shaft (10) is externally connected to another set of driving structures, which can drive the centrifugal wheel (12) to rotate; The hole-shaped rotating disk (2) is capable of rotating around the center, and is composed of a rotating disk ring (201), a hole-shaped hole (202), and a disturbance finger (203); the hole-absorbing disk (3) is fixed around the center, and is composed of a notched ring (301) and a curved groove-type suction hole (302); the fixed disk (4) is fixed around the center, and is composed of a fixed disk base (401), a fixed hole (402), a right side arc plate (403), a prism hole (404), a left lower straight plate (405), and a left upper arc plate (406); the toothed seed transport wheel (5) is capable of rotating around the center, and is composed of a toothed seed transport wheel base (501), a seed transport groove (502), a clamping groove (503), and an inner gear ring (504); the centrifugal wheel (12) is composed of a centrifugal wheel base (1201) and centrifugal blades (1202); The seed metering device is mounted on a fixed pin shaft (9) through a fixing hole (402) of a fixing plate (4) and is used for fixing and supporting the entire seed metering device; the seed inlet on the front housing (1) of the seed metering device is located above the centrifugal wheel (12) to guide corn seeds into the centrifugal wheel (12); the fixing plate (4), the suction hole plate (3) and the hole-shaped rotating plate (2) are coaxially mounted, the hole-shaped rotating plate (2) is mounted on the outside of the fixing plate base (401), and the suction hole plate (3) is placed on a stepped circle on the back side of the rotating plate ring (201) of the hole-shaped rotating plate (2); the curved groove suction hole (302) of the suction hole plate (3) corresponds to the position of the negative pressure suction chamber of the rear housing (8) of the seed metering device, and the negative pressure suction chamber of the rear housing (8) of the seed metering device is connected to the negative pressure fan through an air flow duct; the suction hole plate (3) is mounted on the rear housing (8) of the seed metering device by screws and is fixed. The hole-shaped rotating disk (2) forms a thrust on the corn, and the curved groove suction hole (302) forms a suction force on the corn that is opposite to the thrust. The suction force and the thrust are applied to the corn at different sides, so that the posture of the corn can be adjusted, which is conducive to seed filling. The rotation speed of the hole-shaped rotating disk (2) and the rotation speed of the centrifugal wheel (12) cooperate with each other. When the hole (202) on the hole-shaped rotating disk (2) just contacts the left side of the curved groove suction hole (302) on the suction hole disk (3), the centrifugal blade (1202) of the centrifugal wheel (12) just rotates over the left side of the curved groove suction hole (302) on the suction hole disk (3). The slot (503) of the toothed seed transport wheel (5) cooperates with the protrusion of the rear shell (8) of the seed metering device to assist in fixing the entire seed metering device and prevent the instability of the fixing pin shaft (9). The inner gear ring (504) of the toothed seed transport wheel (5) meshes with the driving gear (11). When the seed metering device is in operation, corn seeds enter the centrifugal wheel (12) through the seed inlet on the front shell (1) of the seed metering device; due to the rotation of the centrifugal wheel (12), the centrifugal blades (1202) drive the corn to rotate and then disperse along the blades; when the centrifugal blades (1202) rotate to the lower notch, the corn seeds are centrifugally thrown out due to the lack of the constraint of the arc plate; when the thrown corn passes through the suction hole plate (3), the corn seeds are adsorbed due to the negative pressure suction of the curved groove suction holes (302); when the shaped holes (202) of the shaped hole rotating plate (2) pass through the curved groove suction holes (302), the corn seeds are The position where the corn seeds are preferably adsorbed is within the trajectory range of the rotation area of ​​the shaped hole (202), thereby completing the seed filling; if the corn seeds are not adsorbed by the negative pressure airflow of the curved groove type suction hole (302), they fall to the bottom of the front shell (1) of the seed metering device, and under the action of the disturbance finger (203) rotating and tilting and guiding the rotating disk (2) of the shaped hole, the corn seeds flow toward the shaped hole (202), and synchronously interact with the curved groove type suction hole (302) and the shaped hole (202), thereby promoting the seed filling; after the seed filling is completed, the corn seeds rotate to the upper side and fall into the seed transport groove (502) of the toothed seed transport wheel (5), completing the subsequent seeding operation.

2. According to the centrifugal seed leveling-double-hole interactive corn plot precision seed metering device according to claim 1, the rotating disk ring (201) of the hole rotating disk (2) is stepped, and 8 holes (202) are evenly distributed around the outermost circle. A disturbance finger (203) is provided at the top of the front end of each hole (202), and the disturbance finger (203) is along the tangent direction of the hole (202) and forms an angle of 20 to 50 degrees with the plane where the top of the hole (202) is located.

3. According to the centrifugal seed leveling-double-hole interactive corn plot precision seeding device of claim 1, the upper and lower heights of the curved groove suction holes (302) of the suction hole plate (3) cover the entire area of ​​the shaped holes (202) of the shaped hole rotating plate (2); in order to ensure that the corn after centrifugation does not fall on the bottom of the seeding device and can be adsorbed within the trajectory range of the shaped holes (202), the center line fitting formula of the curved groove suction holes (302) is: y =-7E -05 x 5 +0.0078 x 4 -0.342 x 3 +7.4467 x 2 -80.849 x +452.

68.

4. According to the centrifugal seed leveling-double-hole interactive corn plot precision seed metering device of claim 1, the left lower straight plate (405) and the left upper guard plate (406) of the fixed plate (4) together form a left arc plate, and the left arc plate and the right arc plate (403) are respectively installed on the left and right sides of the centrifugal wheel (12) to prevent corn seeds from spreading to the surroundings; the upper notch angle formed by the left upper guard plate (406) and the right arc plate (403) is 80°, which is used to receive corn seeds falling into the centrifugal wheel (12); the left lower straight plate (405) and the right arc plate (403) form a notch angle of 80°. The angle of the lower notch is 35°, so that the corn seeds can fly out under the action of the centrifugal wheel (12); the angle between the upper notch and the lower notch formed by the left upper guard plate (406), the left lower straight plate (405) and the right arc plate (403) is 150°, which can ensure that the seeds can fully enter the centrifugal wheel (12) and can also ensure that the seeds are fully dispersed in the centrifugal wheel (12), so that the corn after centrifugation is moved and adsorbed by the airflow; the left lower straight plate (405) cooperates with the shaped hole (202) to prevent the corn after centrifugation from being thrown to the bottom of the front shell (1) of the seed metering device away from the seed filling area.

5. According to the centrifugal seed leveling-double-hole interactive type corn plot precision seed metering device as described in claim 1, the centrifugal blades (1202) of the centrifugal wheel (12) are evenly distributed around the circumference of the centrifugal wheel base (1201), and the number is 5; in order to achieve smooth centrifugal movement and flying out of corn and prevent corn seeds from being carried away and difficult to fall, the centrifugal blades (1202) are curved, and the outer curve fitting formula of the centrifugal blades (1202) is: y =-0.0146 x 2 +1.0518 x +12.307.

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