A centrifugal uniform seed-dual-hole interaction type corn plot precision seed-metering device

Abstract

The present application relates to a kind of centrifugal uniform seed - double-hole interaction type corn plot precision seed metering device, including seed metering device front shell, type hole rotating disc, suction hole disc, fixed disc, tooth type seed wheel, driving shaft, connecting key, seed metering device rear shell, fixed pin shaft, edge shaft, driving gear, centrifugal wheel;Type hole rotating disc, suction hole disc, fixed disc, centrifugal wheel jointly formed centrifugal seed - double-hole interaction seed cavity filling area, type hole rotating disc, fixed disc, suction hole disc coaxial installation, type hole rotating disc and tooth type seed wheel fixed connection synchronous rotation, suction hole disc is fixed unmoved;Seed metering device adopts the mode of double-shaft drive, driving shaft, edge shaft is separately installed, does not affect each other, driving gear is installed on driving shaft, driving gear and the inner gear ring of tooth type seed wheel are meshed, centrifugal wheel is installed on edge shaft.The present application adopts the mode of centrifugal uniform seed - compound filling, and the disordered corn seed is sequentially moved, airflow suction hole acts on corn together, and filling effect is improved.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery, specifically relating to a centrifugal uniform seeding-dual-hole interactive precision seed metering device for corn plots. Background Technology

[0002] Currently, precision seeding in corn plots is mainly done manually, and the development of mechanized seeding is slow. The main reason for this is that the precision seed metering devices for corn plots are of limited types, have poor seed filling effect, and have a high rate of missed seed filling. Summary of the Invention

[0003] This invention addresses the problems of limited variety, poor seed filling effect, and high missing seed rate in precision seed metering devices for corn plots by providing a centrifugal uniform seeding-dual-hole interactive precision seed metering device for corn plots. This device can effectively improve the seed filling effect of the seed metering device and ensure single-seed filling effect.

[0004] The technical solution adopted by this invention to solve its technical problem is: a centrifugal uniform seeding-dual-hole interactive precision seed metering device for maize plots, comprising a front housing of the seed metering device, a shaped hole rotating disk, a suction hole disk, a fixed disk, a toothed seed conveying wheel, a drive shaft, a connecting key, a rear housing of the seed metering device, a fixed pin shaft, a prism shaft, a drive gear, and a centrifugal wheel; the shaped hole rotating disk can rotate around the center and is composed of a rotating disk ring, shaped holes, and disturbance fingers; the suction hole disk is fixed around the center and is composed of a notched ring and curved groove suction holes; the fixed disk is fixed around the center and is composed of a fixed disk base, a fixed hole, a right arc plate, a prism shaft hole, a left lower straight plate, and a left upper arc plate; the toothed seed conveying wheel can rotate around the center and is composed of a toothed seed conveying wheel base, a seed conveying groove, a slot, and a... The device consists of an internal gear ring; the centrifugal wheel is composed of a centrifugal wheel base and centrifugal blades; the seed metering device is mounted on a fixed pin shaft through the fixing hole of the fixed plate, which is used for the fixed support of the entire seed metering device; the shaped hole rotating plate, suction hole plate, fixed plate, and centrifugal wheel together form the seed filling area of ​​the centrifugal seeding-dual hole interaction; the seed inlet on the front housing of the seed metering device is located above the centrifugal wheel, guiding the corn seeds into the centrifugal wheel; the fixed plate, suction hole plate, and shaped hole rotating plate are coaxially installed, the shaped hole rotating plate is installed on the outside of the fixed plate base, and the suction hole plate is placed on the stepped circle on the back of the rotating plate ring of the shaped hole rotating plate; the curved groove suction hole of the suction hole plate corresponds to the negative pressure suction chamber of the rear housing of the seed metering device, and the negative pressure suction chamber of the rear housing of the seed metering device... The suction chamber is connected to a negative pressure fan via an airflow duct; the suction plate is fixedly mounted on the rear housing of the seed metering device with screws; the shaped hole rotating plate and the toothed seed conveyor wheel are fixedly connected and rotate synchronously; the seed metering device changes the traditional center-driven method, with the drive shaft and prism shaft installed separately and without interference; the drive gear is mounted on the drive shaft, and the centrifugal wheel is mounted on the prism shaft; the drive shaft is externally connected to a drive mechanism, and the drive gear is mounted on the drive shaft. The rotation of the drive shaft drives the drive gear, which in turn drives the toothed seed conveyor wheel to rotate, and also drives the shaped hole rotating plate to rotate, while the suction plate remains fixed; the prism shaft is externally connected to another drive structure, which can drive the centrifugal wheel to rotate; the rotation speed of the shaped hole rotating plate and the rotation speed of the centrifugal wheel are coordinated with each other, so... When the shaped hole on the rotating disc just contacts the left side of the curved groove suction hole on the suction disc, the blades of the centrifugal wheel just rotate above the left side of the curved groove suction hole on the suction disc. When the seed metering device is working, corn seeds enter the centrifugal wheel through the seed inlet on the front housing of the seed metering device. 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 constraint from the arc plate, the corn seeds are centrifugally thrown out. When the thrown corn passes through the suction disc, the corn seeds will be adsorbed due to the negative pressure suction of the curved groove suction hole. When the shaped hole on the rotating disc passes through the curved groove suction hole, the corn seeds are just adsorbed within the trajectory range of the rotating shaped hole, thus completing the seed filling.If the corn seeds are not adsorbed by the negative pressure airflow of the curved groove suction hole and fall to the bottom of the front housing of the seed metering device, they will flow towards the seed hole under the agitation and tilting guidance of the rotating disc. Simultaneously, the seeds will interact with the curved groove suction hole and the seed hole, thus promoting seed filling. After filling, the corn seeds will rotate upwards and fall into the seed conveying groove of the toothed seed conveying wheel, completing the subsequent seed metering operation.

[0005] The rotating disc of the perforation plate has a stepped ring, with 8 perforations evenly distributed around the outermost circle. The rotation of the perforations forms a semi-enclosed area with the front shell of the seed metering device. Each perforation is equipped with a disturbance finger at the top front end. The disturbance finger is at a certain angle to the plane where the top of the perforation is located, along the tangent of the perforation. It can move and guide the corn seeds into the perforation, preventing the corn scattered at the bottom of the front shell of the seed metering device from failing to be filled with seeds.

[0006] The vertical height of the curved groove suction hole of the suction plate covers the entire area of ​​the shaped hole of the rotating shaped hole disk, and the horizontal range can cover the left and right offset distance of the corn movement after centrifugation. In order to ensure that the corn after centrifugation does not fall to the bottom of the seed metering device as much as possible, but can be attracted within the trajectory range of the shaped 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.

[0007] The lower left straight plate and the upper left protective plate of the fixed plate together form the left arc plate. The left and right arc plates are respectively installed on the left and right sides of the centrifugal wheel to prevent corn seeds from spreading in all directions. The upper notch formed by the left and right arc plates has an angle of 80°, which is used to receive corn seeds falling into the centrifugal wheel. The lower notch formed by the left and right arc plates has an angle of 35°, which is used for corn seeds to fly out under the action of the centrifugal wheel. The included angle between the upper and lower notches formed by the left and right arc plates is 150°. In this case, it can ensure that the seeds can fully enter the centrifugal wheel and fully disperse the seeds in the centrifugal wheel, so that the movement of the corn after centrifugation is absorbed by the airflow. The lower left 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 and away from the seed filling area.

[0008] The slot of the toothed seed conveyor wheel cooperates with the protrusion of the rear housing of the seed metering device to help fix the entire seed metering device and prevent the fixing pin from becoming unstable.

[0009] The centrifugal blades of the centrifugal wheel are evenly distributed around the circumference of the centrifugal wheel base, with a quantity of 5. In order to achieve smooth centrifugal transport and flight of corn and avoid the corn seeds being carried away and difficult to fall, the centrifugal blades are curved.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] This invention employs a centrifugal method, using centrifugal blades to organize the disordered accumulation of corn kernels, thereby increasing the probability of kernel adsorption. It utilizes a combined pneumatic-orifice-disturbance finger-assisted seed filling method. The combined action of pneumatic force and orifice enables rapid seed filling, while the curved groove suction orifice expands the adsorption area, maximizing the adsorption of centrifuged corn kernels. The disturbance finger assist guides the corn kernels falling to the bottom towards the orifice, improving the seed filling effect. Furthermore, this invention replaces the traditional single-drive method with a dual-drive system, where the centrifugal wheel and orifice rotating disk rotate independently, allowing for better innovative optimization of the precision seed metering device. Attached Figure Description

[0012] Figure 1 This is an exploded structural diagram of a centrifugal uniform seeding-dual-hole interactive precision seed metering device for maize plots according to the present invention.

[0013] Figure 2 This is a schematic diagram of the seed filling area of ​​the centrifugal seeding-dual-hole interactive seed metering device for corn plots according to the present invention.

[0014] Figure 3 This is a schematic diagram of the rotating disk of the centrifugal uniform seeding-dual-hole interactive precision seed metering device for maize plots according to the present invention;

[0015] Figure 4 This is a schematic diagram of the suction plate of a centrifugal uniform seeding-dual-hole interactive precision seed metering device for corn plots according to the present invention;

[0016] Figure 5 This is a schematic diagram of the fixed disc of a centrifugal uniform seeding-dual-hole interactive precision seed metering device for maize plots according to the present invention;

[0017] Figure 6 This is a schematic diagram of the toothed seed conveyor wheel of a centrifugal uniform seeding-dual-hole interactive precision seed metering device for maize plots according to the present invention;

[0018] Figure 7 This is a schematic diagram of the centrifugal wheel structure of a centrifugal uniform seeding-dual-hole interactive precision seed metering device for corn plots according to the present invention.

[0019] The attached figures are labeled as follows:

[0020] 1-Front housing of seed meterer; 2-Shaped rotating disc; 3-Suction disc; 4-Fixed disc; 5-Geared seed conveying wheel; 6-Drive shaft; 7-Connecting key; 8-Rear housing of seed meterer; 9-Fixed pin; 10-Piercing shaft; 11-Drive gear; 12-Centrifugal wheel;

[0021] 201-Rotating disk ring; 202-Shaped hole; 203-Disturbance finger;

[0022] 301 - Notched circular ring; 302 - Curved groove suction hole;

[0023] 401-Fixed disc base; 402-Fixed hole; 403-Right side arc plate; 404-Piercing shaft hole; 405-Left side lower straight plate; 406-Left side upper arc plate;

[0024] 501-Geared seed conveyor base; 502-Seed conveyor trough; 503-Slot; 504-Internal gear ring;

[0025] 1201 - Centrifugal wheel base; 1202 - Centrifugal wheel blade.

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] like Figure 1 and Figure 2 As shown, a centrifugal seed metering device for maize plots with a dual-hole interactive mechanism includes a front housing 1, a rotating orifice 2, a suction orifice 3, a fixed disk 4, a toothed seed conveyor wheel 5, a drive shaft 6, a connecting key 7, a rear housing 8, a fixed pin 9, a prism shaft 10, a drive gear 11, and a centrifugal wheel 12. The rotating orifice 2, suction orifice 3, fixed disk 4, and centrifugal wheel 12 together form the seed filling area of ​​the centrifugal seed metering and dual-hole interactive mechanism. The rotating orifice 2, fixed disk 4, and suction orifice 3 are coaxially mounted. The rotating orifice 2 and the toothed seed conveyor wheel 5 are fixedly mounted... Both rotate synchronously; the seed metering device changes the traditional center-driven method, with the drive shaft 6 and the prism shaft 10 installed separately and without affecting each other. The drive gear 11 is installed on the drive shaft 6, and the centrifugal wheel 12 is installed on the prism shaft 10; the drive shaft 6 is externally connected to a drive mechanism, and the drive gear 11 is installed on the drive shaft 6. The rotation of the drive shaft 6 drives the drive gear 11, which in turn drives the toothed seed conveyor wheel 5 to rotate, and also drives the shaped 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 drive structure, which can drive the centrifugal wheel 12 to rotate.

[0028] like Figure 3-7 As shown, the rotating disk 2 with a shaped hole can rotate around the center and is composed of a rotating disk ring 201, a shaped hole 202, and a disturbance finger 203; the suction disk 3 is fixed around the center and is composed of a notched ring 301 and a curved groove 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 arc plate 403, a prism shaft hole 404, a left lower straight plate 405, and a left upper arc plate 406; the toothed seed conveying wheel 5 rotates around the center and is composed of a toothed seed conveying wheel base 501, a seed conveying groove 502, a slot 503, and an internal toothed ring 504; the centrifugal wheel 12 is composed of a centrifugal wheel base 1201 and centrifugal blades 1202.

[0029] The seed metering device is mounted on the fixed pin 9 via the fixed hole 402 of the fixed plate 4, which serves as a fixed support for 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, guiding the corn seeds into the centrifugal wheel 12. The fixed plate 4, the suction plate 3, and the shaped hole rotating plate 2 are coaxially mounted. The shaped hole rotating plate 2 is mounted on the outside of the fixed plate base 401, and the suction plate 3 is placed on the stepped circle on the back of the rotating plate ring 201 of the shaped hole rotating plate 2. The suction plate 3 has a curved groove suction hole. 302 corresponds to the negative pressure suction chamber position of the seed metering device rear housing 8. The negative pressure suction chamber of the seed metering device rear housing 8 is connected to the negative pressure fan through an airflow pipe. The suction plate 3 is fixedly installed on the seed metering device rear housing 8 by screws. The rotation speed of the hole rotating disk 2 and the rotation speed of the centrifugal wheel 12 are coordinated with each other. When the hole 202 on the hole rotating disk 2 just contacts the left side of the curved groove suction hole 302 on the suction plate 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 plate 3.

[0030] When the seed metering device is working, corn seeds enter the centrifugal wheel 12 through the seed inlet on the front housing 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 disperse along the blades; when the centrifugal blades 1202 rotate to the lower notch, due to the lack of constraint from the arc plate, the corn seeds are centrifugally thrown out; when the thrown corn passes through the suction plate 3, due to the negative pressure suction of the curved groove suction hole 302, the corn seeds are adsorbed; when the hole 202 of the hole rotating disk 2 passes through the curved groove suction hole 302, the corn seeds are... The seeds are readily adsorbed within the rotational trajectory of the orifice 202, thus completing the seed filling process. If the corn seeds are not adsorbed by the negative pressure airflow of the curved groove suction hole 302, they fall to the bottom of the front housing 1 of the seed metering device. Under the disturbance and tilting guidance of the rotating orifice disc 203, the corn seeds flow towards the orifice 202, simultaneously interacting with the curved groove suction hole 302 and the orifice 202, thereby promoting seed filling. After the seed filling is completed, the corn seeds rotate upwards and fall into the seed conveying groove 502 of the toothed seed conveying wheel 5, completing the subsequent seed metering operation.

[0031] The rotating disk 2 of the hole rotating disk 2 has a stepped ring 201, with 8 holes 202 evenly distributed around the outermost circle. Each hole 202 has a disturbance finger 203 at the top front end. The disturbance finger 203 is along the tangent direction of the hole 202 and forms an angle of 20 to 50° with the plane where the top end of the hole 202 is located.

[0032] The curved groove suction holes 302 of the suction disc 3 cover the entire area of ​​the shaped holes 202 of the rotating disc 2; to ensure that the centrifuged corn does not fall to the bottom of the seed metering device and is adsorbed within the trajectory range of the shaped holes 202, the centerline fitting formula of the curved groove suction holes 302 is as follows: y =-7E-05 x 5 +0.0078 x 4 -0.342 x 3 +7.4467 x 2 -80.849 x +452.68.

[0033] The lower left straight plate 405 and the upper left guard plate 406 of the fixed disk 4 together form the left arc plate. 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 in all directions. The upper notch angle formed by the upper left 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 lower notch angle formed by the lower left 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 angle between the upper and lower notches formed by the upper left guard plate 406, the lower left straight plate 405 and the right arc plate 403 is 150°. In this case, it can ensure that the seeds can fully enter the centrifugal wheel 12 and that the seeds can be fully dispersed in the centrifugal wheel 12. Then, the movement of the centrifuged corn is absorbed by the airflow. The lower left straight plate 405 cooperates with the orifice 202 to prevent the centrifuged corn from being thrown to the bottom of the seed metering device front housing 1 away from the seed filling area.

[0034] The slot 503 of the toothed seed conveyor wheel 5 cooperates with the protrusion of the rear housing 8 of the seed metering device to help fix the entire seed metering device and prevent the fixing pin 9 from becoming unstable.

[0035] The centrifugal blades 1202 of the centrifugal wheel 12 are evenly distributed around the circumference of the centrifugal wheel base 1201, with a quantity of 5. To achieve smooth centrifugal transport and ejection of the corn, and to prevent the corn seeds from being carried away and difficult to fall, the centrifugal blades 1202 are curved. The fitting formula for the outer curve of the centrifugal blades 1202 is as follows: y =-0.0146 x 2 +1.0518 x +12.307.

[0036] Finally, it should be noted that although the best specific embodiments of the present invention have been described above by way of examples, the scope of protection of the present invention is not limited to the above description. Those skilled in the art will understand that any modifications and variations fall within the scope of protection of the present invention without departing from the spirit and essence of the teachings of the present invention.

Claims

1. A centrifugal seed dispensing-dual-hole interactive precision seed metering device for maize plots, comprising a front housing (1), a shaped hole rotating disk (2), a suction disk (3), a fixed disk (4), a toothed seed conveying wheel (5), a drive shaft (6), a connecting key (7), a rear housing (8), a fixed pin (9), a prism shaft (10), a drive gear (11), and a centrifugal wheel (12); the shaped hole rotating disk (2), the suction disk (3), the fixed disk (4), and the centrifugal wheel (12) together form the seed filling area of ​​the centrifugal seed dispensing-dual-hole interactive seed cavity; the shaped hole rotating disk (2), the fixed disk (4), and the suction disk (3) are coaxially mounted; the shaped hole rotating disk (2) and the toothed seed conveying wheel (5) The fixed synchronous rotation is achieved while the suction plate remains stationary. The seed metering device changes the traditional center-driven method, with the drive shaft (6) and the prism shaft (10) installed separately and without affecting each other. The drive gear (11) is installed on the drive shaft (6), and the centrifugal wheel (12) is installed on the prism shaft (10). The drive shaft (6) is externally connected to a drive mechanism, and the drive gear (11) is installed on the drive shaft (6). The rotation of the drive shaft (6) drives the drive gear (11), which in turn drives the toothed seed conveyor wheel (5) to rotate, and also drives the shaped hole rotating disk (2) to rotate, while the suction plate (3) remains stationary. The prism shaft (10) is externally connected to another drive structure, which can drive the centrifugal wheel (12) to rotate. The rotating disk (2) with a shaped hole can rotate around the center and is composed of a rotating disk ring (201), a shaped hole (202), and a disturbance finger (203); the suction disk (3) is fixed around the center and is composed of a notched ring (301) and a curved groove 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 arc plate (403), a prism shaft hole (404), a left lower straight plate (405), and a left upper arc plate (406); the toothed seed conveyor wheel (5) rotates around the center and is composed of a toothed seed conveyor wheel base (501), a seed conveyor groove (502), a slot (503), and an internal toothed 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 the fixed pin (9) through the fixed hole (402) of the fixed plate (4) for the fixed support of 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 the corn seeds into the centrifugal wheel (12); the fixed plate (4), the suction plate (3), and the shaped hole rotating plate (2) are coaxially mounted, the shaped hole rotating plate (2) is mounted on the outside of the fixed plate base (401), and the suction plate (3) is placed on the stepped circle on the back of the rotating plate ring (201) of the shaped hole rotating plate (2); the curved groove suction hole (302) of the suction 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 the airflow pipe; the suction plate (3) is mounted on the rear housing (8) of the seed metering device with screws and is fixed in place. The rotating disk (2) with the shaped hole 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 force apply force to the corn on different sides, which can adjust the corn posture and facilitate seed filling. The rotation speed of the rotating disk (2) with the rotation speed of the centrifugal wheel (12) are coordinated with each other. When the shaped hole (202) on the rotating disk (2) just contacts the left side of the curved groove suction hole (302) on the suction 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 disk (3). The slot (503) of the toothed seed conveying wheel (5) and the protrusion of the rear housing (8) of the seed metering device cooperate to assist in fixing the entire seed metering device and prevent the instability of the fixing pin (9). The inner tooth ring (504) of the toothed seed conveying wheel (5) meshes with the drive gear (11). When the seed metering device is working, corn seeds enter the centrifugal wheel (12) through the seed inlet on the front housing (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, due to the lack of constraint of the arc plate, the corn seeds are centrifugally thrown out; when the thrown corn passes through the suction plate (3), due to the negative pressure suction of the curved groove suction hole (302), the corn seeds will be adsorbed; when the shaped hole (202) of the shaped hole rotating disk (2) passes through the curved groove suction hole (302), the corn seeds are... The seeds are readily adsorbed within the rotational trajectory of the shaped hole (202), thus completing the seed filling process. If the corn seeds are not adsorbed by the negative pressure airflow of the curved groove suction hole (302), they fall to the bottom of the front housing (1) of the seed metering device. Under the disturbance of the rotating disc (203) and the tilting guidance, the corn seeds flow towards the shaped hole (202), and simultaneously interact with the curved groove suction hole (302) and the shaped hole (202), thus promoting seed filling. After the seed filling is completed, the corn seeds rotate upwards and fall into the seed transport groove (502) of the toothed seed transport wheel (5), completing the subsequent seed metering operation.

2. According to claim 1, the centrifugal uniform seeding-dual-hole interactive precision seed metering device for maize plots is described in that the rotating disc ring (201) of the rotating disc (2) is stepped, and eight holes (202) are evenly distributed around the outermost circle. Each hole (202) has a disturbance finger (203) at the top front end. The disturbance finger (203) is along the tangent direction of the hole (202) and forms an angle of 20 to 50° with the plane where the top end of the hole (202) is located.

3. According to claim 1, the centrifugal uniform seeding-dual-hole interactive precision seed metering device for maize plots has its upper and lower heights of the curved groove suction holes (302) of the suction plate (3) covering the entire area of ​​the shaped holes (202) of the rotating plate (2); in order to ensure that the centrifuged maize does not fall to the bottom of the seed metering device and can be adsorbed within the trajectory range of the shaped holes (202), the centerline fitting formula of the curved groove suction holes (302) is as follows: 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 claim 1, the left lower straight plate (405) and the left upper arc plate (406) of the fixed disk (4) together form the left arc plate. 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 arc plate (406) and the right arc plate (403) is 80°, which is used to receive corn seeds falling into the centrifugal wheel (12). The angle formed by the left lower straight plate (405) and the right arc plate (403) is 80°. The lower notch angle is 35°, which is used for the corn seeds to fly out under the action of the centrifugal wheel (12); the upper notch and lower notch formed by the upper arc plate (406) on the left, the lower straight plate (405) on the left and the arc plate (403) on the right are 150° apart. In this case, it can ensure that the seeds can fully enter the centrifugal wheel (12) and that the seeds can be fully dispersed in the centrifugal wheel (12), so that the movement of the corn after centrifugation is adsorbed by the airflow; the lower straight plate (405) on the left cooperates with the hole (202) to prevent the corn after centrifugation from being thrown to the bottom of the seed metering device front shell (1) away from the seed filling area.

5. According to claim 1, the centrifugal uniform seeding-dual-hole interactive type precision seed metering device for maize plots has five centrifugal blades (1202) evenly distributed around the circumference of the centrifugal wheel base (1201). To achieve smooth centrifugal transport and ejection of the maize seeds, and to prevent the seeds from being carried away and difficult to fall, the centrifugal blades (1202) are curved. The outer curve fitting formula for the centrifugal blades (1202) is as follows: y =-0.0146 x 2 +1.0518 x +12.307.

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