An air-blowing harvesting platform for reducing corn harvest losses

Abstract

The present invention discloses an air-blown harvesting platform for reducing corn harvest losses, belonging to the technical field of agricultural machinery. The device includes a straw-separating and feeding device, an auger conveying device, a suspended ear-picking device, and an air-blown assisted harvesting device. The suspended ear-picking device is located below the straw-separating and feeding device, and the air-blown assisted harvesting device is fixed to the bottom of the suspended ear-picking device via U-bolts. The auger conveying device is located behind the straw-separating and feeding device. The straw-separating and feeding device is used to separate the corn plants and guide feeding. The auger conveying device is used to collect and transport the corn ears picked by the suspended ear-picking device. The suspended ear-picking device is used to pick corn ears with low loss. The air-blown assisted harvesting device is used to reduce harvest losses and prevent weed blockage. The present invention reduces the possibility of blockage and the additional power loss of the harvesting platform, thereby improving the straw passing rate.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to an air-blowing type harvesting platform for reducing corn harvest losses. Background Art

[0002] Corn is one of my country's three major grain crops. With the continuous improvement of agricultural mechanization and the expansion of cultivated areas in recent years, combine harvesters have been increasingly used for corn harvesting, greatly facilitating the process. During the operation of a combine harvester, grain loss and ear damage are inevitable. Damage caused by the collision of ears with the picking plate during harvesting is a key indicator of harvest quality. During harvesting, weeds can become lodged between the stem rollers and the picking plate, causing blockages and increasing the combine's power loss.

[0003] Collision loss occurs when the stalks, pulled downward by the pull rollers during the harvesting process, are blocked by the picking plates, preventing the ears from passing through. This collision causes grain loss during the picking process.

[0004] The main focus of existing corn harvesters in reducing losses is on entrainment loss and incomplete threshing loss, and there are few designs for reducing ear picking loss. At present, most domestic corn harvesters use plate-type ear-picking devices. In order to reduce collision losses, Chinese patent CN 202122293995.3 discloses an ear-picking plate, a cutting table and a corn harvester with a bidirectional buffer device to reduce collision losses and the problem of cutting table blockage; Patent CN202311417081.0 discloses a rotary ear-picking plate mechanism for a corn harvester cutting table to reduce corn damage rate and the situation of broken stalks and choking stalks; "Design and Test of Reverse Flexible Fresh Corn Ear-picking Device_Chen Bo" designed a reverse flexible fresh corn ear-picking device to reduce the damage rate of corn ears; "Li Yinian, Yi Yingwu, Du Shiwei et al. Design and Test of Air-blown Cutting Table for Plot Grain Combine Harvester [J]. Journal of Agricultural Machinery, 2017, 48(06):79-87." The air-blown cutting table of the plot grain combine harvester solves the problem of grain residue and difficulty in cleaning the machine. John Deere's Y210 corn harvester uses a low-angle, four-row header to reduce kernel damage, while the R230 combine harvester uses a three-speed, continuously variable, all-axial flow drum to reduce kernel breakage. Cressoin's Cressoni 830 series features an Air-Flow system to reduce ear loss.

[0005] Currently, research and technology for corn harvester collision losses lags behind that for entrainment and incomplete threshing. This is primarily because collision losses are smaller than the latter two types of losses. Header collision losses account for approximately 10% of total losses, and investment in these costs is relatively low. Therefore, a pneumatic header that reduces corn harvest losses is needed to address collision losses in harvesters. Summary of the Invention

[0006] The purpose of the present invention is to provide an air-blown harvesting platform for reducing corn harvest losses, comprising a straw-separating and feeding device, an auger conveying device, a suspended ear-picking device, and an air-blown assisted harvesting device; the suspended ear-picking device is located below the straw-separating and feeding device, and the air-blown assisted harvesting device is fixed to the bottom of the suspended ear-picking device by U-shaped bolts; the auger conveying device is located behind the straw-separating and feeding device;

[0007] The straw-separating and feeding device includes a straw divider, a straw chain, and straw teeth, which are used to separate the corn plants and guide feeding. The straw chain is located below the straw divider and engages with a straw sprocket fixed to the frame via a key connection. The straw teeth are regularly distributed on the straw chain.

[0008] The auger conveying device includes an auger housing, an auger, and a bearing, and is used to centrally suspend the corn ears picked by the ear picking device and transport them; the auger is fixed to the auger housing through the bearing;

[0009] The suspended ear-picking device includes an ear-picking plate, a cover plate, an adjusting device, a fixing frame, a stem-pulling roller, a frame, a spacing limiting device, and a buffer device, and is used for low-loss picking of corn ears; the suspended ear-picking device is connected to the straw sprocket through a key; the ear-picking plate is installed on the adjusting device, the cover plate is set on the frame, the adjusting device is connected to the fixing frame, and the adjusting device and the stem-pulling roller are both installed on the frame; the stem-pulling roller is located below the ear-picking plate; buffer devices are installed at the front and rear ends of the gap formed between the ear-picking plate and the frame; the spacing limiting device is installed on one side of the ear-picking plate and fixed to the frame by bolts, and the maximum spacing of the ear-picking plates is adjusted by adjusting the spacing limiting device, and the entire suspended ear-picking device has a symmetrical structure;

[0010] The air-assisted harvesting device includes a fan, a main air duct, a wind manifold and a nozzle device, which are used to reduce harvest losses and prevent weed blockage; the fan is located on one side of the auger shell, the head end of the wind manifold is connected to the main air duct, and the nozzle device is arranged at the end of the wind manifold and is located in the gap between the ear picking plate and the stem pulling roller.

[0011] The adjusting device includes an adjusting device fixing frame, a spring rear fixing shaft, a spring housing, an adjusting spring, left and right adjusting device housings, a front fixing pin, a fixing screw, an upper and lower adjusting fixing pins, and an adjusting device shaft; the spring rear fixing shaft fixes the adjusting device fixing frame and the spring housing to the adjusting device shaft, an adjusting spring is arranged inside the spring housing, left and right adjusting device housings are arranged outside the spring housing, and a front fixing pin is arranged at the tail end of the left and right adjusting device housings; the ear picking plate is connected to the upper and lower adjusting fixing pins by fixing screws; the adjusting device is connected to the frame through the adjusting device fixing frame and the fixing frame.

[0012] The buffer device includes a buffer device back cover, a buffer device support shell, a buffer device front cover, a buffer spring, and a button; the buffer device front cover and the buffer device back cover are transitionally matched with the buffer device support shell, the button and the buffer device back cover are clearance matched, one end of the buffer spring is matched with the threaded groove inside the button, and the other end is in contact with the inner boss of the buffer device front cover; the buffer device back cover, the buffer device support shell, the buffer device front cover and the button form a space length equal to the free length of the buffer spring.

[0013] The front end of the straw divider is semi-conical and the rear end is semi-prismatic.

[0014] The ratio of the number of ear picking plates to the number of wind manifolds is 1:2.

[0015] The nozzle device includes a first air nozzle, a second air nozzle, a third air nozzle, and a fourth air nozzle; the first air nozzle and the fourth air nozzle are on the same side, and the second air nozzle and the third air nozzle are on the same side; the distance between the first air nozzle, the second air nozzle, the fourth air nozzle, and the third air nozzle in sequence is 50 to 70 mm.

[0016] The included angles between the axes of the first air nozzle, the second air nozzle, the third air nozzle and the fourth air nozzle and the horizontal plane are 30° to 50°, and the included angles between the axes of the first air nozzle, the second air nozzle, the third air nozzle and the fourth air nozzle and the side plane are 10° to 30°.

[0017] The distance between the two stem pulling rollers in a symmetrical structure is 13 to 16 mm.

[0018] The spacing between the two ear-picking plates in a symmetrical structure can be adjusted in the range of 30 to 35 mm.

[0019] The invention discloses a method for using an air-blown harvesting platform to reduce corn harvesting losses. When the harvester moves forward, the corn stalks are forced to separate into rows by the straw divider. The stalks enter the suspended ear picking device with the support of the picking teeth. The stalks are introduced into the working section by the stalk-pulling roller. At the same time, due to the entry of the stalks and under the action of the adjusting device, the gap between the ear picking plates increases, thereby improving the straw passing rate. The spacing limiting device can only increase the spacing of the ear picking plates to a pre-adjusted distance; under the action of the stalk-pulling roller, the stalks are pulled downward, and then the diameter of the stalks will gradually decrease. The adjusting device will gradually return to its original state under the action of the adjusting spring; as the stalk-pulling roller rotates, the stalks will continue to move downward. The diameter of the ear is larger than the distance between the ear picking plates, and the ear contacts the ear picking plates. The ear picking plates move downward with the ear under the action of the adjusting device. When the ear picking plates contact the buffer device, the buffer spring is compressed under the action of the impact force. After the ear is picked, the buffer device and the adjusting device are restored, and the corn ear is sent to the auger conveying device under the action of the picking teeth; the grains that fall due to collision fall through the gap between the ear picking plates, and the air flow generated by the air-blowing auxiliary harvesting device is ejected through the nozzle device, blowing the fallen grains onto the ear picking plates, and are pushed to the auger conveying device under the action of the picking teeth, or are directly blown to the auger conveying device under the action of the air flow.

[0020] The beneficial effects of the present invention are:

[0021] 1. The present invention adds an air-blowing auxiliary harvesting device, which reduces the harvest loss during ear picking, improves the harvest quality, and achieves low-loss harvesting; the generated airflow can also blow away weeds, reducing the possibility of blockage and the additional power loss of the harvesting table, and improving the straw passing rate.

[0022] 2. In view of the shortcomings of traditional ear picking devices that cannot float up and down and move left and right, the present invention designs a suspended ear picking device; a pair of buffer devices are added between the ear picking plate and the frame to reduce the impact force between the corn ears and the ear picking plate, thereby reducing the damage to the ears and achieving low-loss corn harvesting; the adjustment device can also make the ear picking plate move left and right to increase the passing rate of corn stalks and reduce the possibility of blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an overall structural diagram of an air-blowing harvesting platform for reducing corn harvest losses according to the present invention;

[0024] Figure 2 This is a bottom view of the overall structure of an air-blowing harvesting platform for reducing corn harvest losses according to the present invention;

[0025] Figure 3 This is an exploded schematic diagram of an air-blowing harvesting platform for reducing corn harvest losses according to the present invention;

[0026] Figure 4 This is a schematic diagram of the exploded structure of a suspended ear-picking device of an air-blowing harvesting platform for reducing corn harvest losses according to the present invention;

[0027] Figure 5 This is a schematic diagram of the exploded structure of an adjustment device of an air-blowing harvesting table for reducing corn harvest losses according to the present invention;

[0028] Figure 6 This is a schematic diagram of the explosion structure of a buffer device of an air-blowing harvesting platform for reducing corn harvest losses according to the present invention;

[0029] Figure 7 This is a schematic structural diagram of an air-assisted harvesting device of an air-blown harvesting table for reducing corn harvest losses according to the present invention;

[0030] Figure 8 This is a schematic structural diagram of a nozzle device of an air-blowing harvesting platform for reducing corn harvest losses according to the present invention;

[0031] Figure 9 This is a structural schematic diagram of an auger conveying device of an air-blowing harvesting table for reducing corn harvest losses according to the present invention;

[0032] In the figure: 1-1, grain divider; 1-2, grain chain; 1-3, shifting teeth; 2-1, auger housing; 2-2, auger; 2-3, bearing; 3-1, fan; 3-2, main air duct; 3-3, wind manifold; 3-4, nozzle device; 3-41, first air nozzle; 3-42, second air nozzle; 3-43, third air nozzle; 3-44, fourth air nozzle; 4, ear picking device; 4-1, ear picking plate; 4-2, cover plate; 4-3, adjustment device; 4-31, adjustment device fixing bracket; 4-32, spring Rear fixed shaft; 4-33, spring housing; 4-34, adjustment spring; 4-35, left and right adjustment device housing; 4-36, front fixed pin; 4-37, fixing screw; 4-38, up and down adjustment fixed pin; 4-39, adjustment device shaft; 4-4, fixing frame; 4-5, stem pulling roller; 4-6, frame; 4-7, spacing limiting device; 4-8, buffer device; 4-81, buffer device rear cover; 4-82, buffer device support shell; 4-83, buffer device front cover; 4-84, buffer spring; 4-85, button. DETAILED DESCRIPTION

[0033] The present invention provides an air-blowing harvesting platform for reducing corn harvest losses, which will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1 、 2, 3 are respectively the overall structure diagram, the overall structure bottom view, and the exploded schematic diagram of an air-blown harvesting platform for reducing harvest losses provided by the present invention, comprising: a straw-dividing and feeding device, including a straw divider 1-1, a straw chain 1-2, and a straw tooth 1-3. The straw divider 1-1 is located above the straw chain 1-2. The straw divider 1-1 is divided into two sections, front and back. The front end is semi-conical and is used to divide and guide corn plants. The rear end is mainly used to protect the straw chain 1-2. The front and rear ends are hinged together, and the front end can be folded around the hinge point. The rear end is hinged to the auger housing 2-1 and can also be folded to facilitate maintenance of the straw chain 1. The plowing chain 1-2 is linked to the shaft on the frame 4-6 through a key connection, and the plowing teeth 1-3 are evenly distributed on the plowing chain 1-2; the auger conveying device is located at the rear of the entire machine and is connected to the power unit; the suspended ear picking device is located at the lower end of the straw dividing and feeding device and is bolted to the straw divider 1-1, and each suspended ear picking device is evenly distributed at the front end of the auger conveying device; the air-assisted harvesting device is located at the bottom of the entire machine, the main air duct 3-2 is located below the auger housing 2-1 and is fixed with U-bolts, and the wind manifolds 3-3 are symmetrically distributed along the edge of the frame 4-6, and each suspended ear picking device is equipped with a wind manifold 3-3 on both sides.

[0035] like Figure 4 As shown, the suspended ear picking device consists of an ear picking plate 4-1, a cover plate 4-2, an adjustment device 4-3, a fixed frame 4-4, a stem pulling roller 4-5, a frame 4-6, a spacing limiting device 4-7 and a buffer device 4-8. The ear picking plates 4-1 of each suspended ear picking device are symmetrically distributed and fixed with fixing screws 4-37 and upper and lower adjustment fixing pins 4-38. The upper and lower adjustment fixing pins 4-38 are installed on the adjustment device shaft 4-39, and the adjustment device shaft 4-39 cooperates with the fixed frame 4-4 to be fixed to the ear picking frame. The gap between the ear picking plates 4-1 can be enlarged by the adjustment device 4-3. Two threaded holes are symmetrically opened on both sides of the frame 4-6 so that the spacing limiting device 4-7 can be installed at the arc transition of the ear picking plate 4-1 to limit the spacing of the ear picking plates 4-1 during ear picking. Four slots are symmetrically opened on both sides of the frame 4-6 so that a buffer device 4-8 can be installed at the front and rear ends of the ear picking plate 4-1 to achieve a buffering effect on the corn ears when picking, thereby realizing suspended ear picking. The front end of the stem pulling roller 4-5 is a guide area and the rear end is a working area. The front end is conical and has spiral blades on it, and the rear end is a cylindrical roller with six stem pulling edges evenly distributed on it. The stem pulling rollers 4-5 exist in pairs and are located at the lower end of the suspended ear picking device. There is a spacing of 13mm between the two stem pulling rollers 4-5. The shaft at the rear end of the stem pulling roller 4-5 is matched with the hole at the rear end of the frame 4-6 through a bearing. The stem pulling roller 4-5 is rotated inward relative to each other by the power device of the machine to guide and pull the corn stalks downward, thereby completing the picking of the corn ears.

[0036] like Figure 5As shown, the adjustment device 4-3 consists of an adjustment device mounting bracket 4-31, a spring rear fixing shaft 4-32, a spring housing 4-33, an adjustment spring 4-34, left and right adjustment device housings 4-35, a front fixing pin 4-36, a fixing screw 4-37, upper and lower adjustment fixing pins 4-38, and an adjustment device shaft 4-39. The adjustment device 4-3 is mounted on both sides of the ear picking frame via the mounting bracket 4-4. When corn stalks enter the gap, the ear picking plates 4-1 move relative to each other, causing the upper and lower adjustment fixing pins 4-38 to rotate in the extended holes of the adjustment device shaft 4-39. The adjustment spring 4-34 stretches, increasing the gap between the ear picking plates 4-1 and improving the passability of the corn stalks. The spacing limiting device 4-7 adjusts the maximum spacing between the ear picking plates 4-1, limiting the maximum spacing between the ear picking plates 4-1 during ear picking. When the diameter of the corn stalks is smaller than the gap between the ear picking plates 4-1, the gap is restored under the tension of the adjustment spring 4-34. By adjusting the spacing limiting device 4-7, the spacing between the ear picking plates can be adjusted to 30-35 mm. The ear picking plates 4-1 move downward under the impact of the ear. When they come into contact with the buffer device 4-8, the movement speed of the ear picking plates 4-1 is slowed down due to the presence of the adjustment spring 4-34, thereby achieving low-loss ear picking.

[0037] like Figure 6 As shown, the buffer device 4-8 includes a buffer device back cover 4-81, a buffer device support shell 4-82, a buffer device front cover 4-83, a buffer spring 4-84 and a button 4-85. The buffer device 4-8 is installed in the gap between the ear picking plate 4-1 and the frame 4-6. A buffer device 4-8 is installed at the front and rear ends of the gap formed by each ear picking plate 4-1 and the frame 4-6. The buffer devices 4-8 on the left and right sides of the same suspended ear picking device are symmetrically arranged. The front cover 4-83 and the rear cover 4-81 of the buffer device are both transitionally fitted with the buffer device support shell 4-82, the button 4-85 is clearance-fitted with the rear cover 4-81 of the buffer device, one end of the buffer spring 4-84 is fitted with the threaded groove inside the button 4-85, and the other end is in contact with the inner boss of the front cover 4-83 of the buffer device; the rear cover 4-81 of the buffer device, the support shell 4-82 of the buffer device, the front cover 4-83 of the buffer device and the button 4-85 form a spatial length equal to the free length of the buffer spring 4-84.

[0038] like Figure 7As shown, the air-assisted harvesting device includes a fan 3-1, a main air duct 3-2, a wind manifold 3-3, and a nozzle assembly 3-4. The fan 3-1 is fixed to the auger housing 2-1 and connected to the tractor's power output shaft via a coupling. The number of fans 3-1 is determined by the number of rows being worked. When the number of rows exceeds six, two fans are required, symmetrically located at the other end of the auger housing 2-1. The wind manifolds 3-3 are paired, with a pair of wind manifolds 3-3 on either side of each suspended ear-picking device. In this embodiment, there are three suspended ear-picking devices, so six pairs of wind manifolds 3-3 are required. Each wind manifold 3-3 is terminated with an air nozzle to control the wind pressure and direction. The wind generated by the fan passes through the main air duct 3-2 and the wind manifold 3-3 to the air nozzle and is blown out. When the corn ears come into contact with the ear picking plate 4-1, the kernels will be knocked off the ears due to the impact force and then fall from the ear picking plate 4-1. At this time, the wind sprayed from the nozzle can blow the kernels obliquely backward and upward, and finally fall on the ear picking plate 4-1 or fall into the auger conveying device.

[0039] like Figure 8 As shown, a first air nozzle 3-41, a second air nozzle 3-42, a third air nozzle 3-43, and a fourth air nozzle 3-44 are provided at the end of the wind manifold 3-3, which are distributed in pairs on both sides of the suspended ear picking device. The four air nozzles are staggered to ensure the continuity of the ejected airflow, and the angle between the axis of the air nozzle and the horizontal plane is set to 40°, and the angle with the side plane is 20° to achieve effective use of wind.

[0040] like Figure 9 As shown, the auger conveying device includes an auger housing 2-1, an auger 2-2 and a bearing 2-3. The auger 2-2 is fixed to the auger housing 2-1 through the bearing 2-3, and the auger 2-2 adopts a single-side transmission method to collect grains in the middle.

[0041] The air-blown harvesting platform for reducing corn harvest losses in this embodiment operates as follows: when the harvester advances, the corn stalks are forcibly separated into rows by the straw divider 1-1. The stalks enter the suspended ear picking device with the support of the shifting teeth 1-3. The stalks are introduced into the working section by the introduction section of the stalk-pulling roller 4-5. At the same time, the ear-pulling plates 4-1 move to both sides due to the entry of the stalks and under the action of the adjusting device 4-3, thereby increasing the gap between the ear-pulling plates 4-1 and improving the stalk passing rate. However, due to the presence of the spacing limiting device 4-7, the spacing between the ear-pulling plates 4-1 does not increase excessively. The stalks are pulled downward by the pulling edge of the working section of the stalk-pulling roller 4-5. As the stalks are pulled downward, the diameter of the stalks gradually decreases. The adjusting device 4-3 slowly returns to its original state under the action of the adjusting spring 4-34. As the stem-pulling roller 4-5 rotates, the stem continues to move downward. Since the diameter of the corn ear is larger than the distance between the corn picking plates 4-1 and cannot pass through the gap, the corn ear contacts the corn picking plates 4-1. Under the action of the adjusting device 4-3, the corn picking plates 4-1 move downward along with the corn ear. When the corn picking plates 4-1 contact the buffer device 4-8, the buffer spring 4-84 of the buffer device 4-8 is compressed under the action of the impact force. After the corn ear is picked, the buffer device 4-8 and the adjusting device 4-3 are restored, completing the picking of the corn ear. The presence of the buffer device 4-8 reduces the impact force between the corn ear and the corn picking plates 4-1, reducing the corn ear breakage rate. Despite the presence of the buffer device 4-8, the corn ear will still inevitably break, resulting in dropped grains. The fallen grains fall through the gap between the picking plates 4-1. At this time, the air flow generated by the air-blowing auxiliary harvesting device is ejected through the nozzle device 3-4, which can blow the fallen grains onto the picking plates 4-1, and then be pushed to the auger conveying device under the action of the picking teeth 1-3, or directly blown to the auger conveying device by the air flow.

[0042] The above embodiment reduces the breakage of corn ears through the regulating device, and then uses the airflow generated by the fan to blow the fallen kernels into the rear grain collecting auger to reduce harvest losses. At the same time, the weeds attached to the corn stalks are blown to the rear to reduce the possibility of clogging of the ear picking device, thereby improving the harvest quality of the cutting table.

Claims

1. An air-blown harvesting platform for reducing corn harvest losses, characterized in that: It includes a straw-separating and feeding device, an auger conveying device, a suspended ear-picking device, and an air-assisted harvesting device; the suspended ear-picking device is located below the straw-separating and feeding device, and the air-assisted harvesting device is fixed to the bottom of the suspended ear-picking device by U-shaped bolts; the auger conveying device is located behind the straw-separating and feeding device; The straw dividing and feeding device comprises a straw divider (1-1), a straw chain (1-2), and a straw tooth (1-3), and is used for separating and feeding corn plants; the straw chain (1-2) is located below the straw divider (1-1) and is engaged with a straw sprocket fixed to a frame (4-6) via a key connection; The plowing teeth (1-3) are regularly distributed on the plowing chain (1-2); The auger conveying device comprises an auger housing (2-1), an auger (2-2), and a bearing (2-3), and is used for centrally suspending and conveying corn ears picked by the ear picking device; the auger (2-2) is fixed to the auger housing (2-1) via the bearing (2-3); The suspended ear picking device comprises an ear picking plate (4-1), a cover plate (4-2), an adjusting device (4-3), a fixing frame (4-4), a stem pulling roller (4-5), a frame (4-6), a spacing limiting device (4-7), and a buffer device (4-8), and is used for low-loss picking of corn ears; the suspended ear picking device is connected to the reed sprocket via a key; the ear picking plate (4-1) is mounted on the adjusting device (4-3), the cover plate (4-2) is arranged on the frame (4-6), the adjusting device (4-3) is connected to the fixing frame (4-4), and the adjusting device (4-3) and the stem pulling roller (4-5) are both installed on the frame (4-6); the stem pulling roller (4-5) is located below the ear picking plate (4-1); buffer devices (4-8) are installed at the front and rear ends of the gap formed between the ear picking plate (4-1) and the frame (4-6); the spacing limiting device (4-7) is installed on one side of the ear picking plate (4-1) and is fixed to the frame (4-6) by bolts, and the maximum spacing of the ear picking plate (4-1) is adjusted by adjusting the spacing limiting device (4-7), and the entire suspended ear picking device has a symmetrical structure; The air-assisted harvesting device comprises a fan (3-1), a main air duct (3-2), a wind manifold (3-3) and a nozzle device (3-4), and is used to reduce harvest losses and prevent weed blockage; the fan (3-1) is located on one side of the auger housing (2-1), the head end of the wind manifold (3-3) is connected to the main air duct (3-2), and the nozzle device (3-4) is arranged at the end of the wind manifold (3-3) and is located in the gap between the ear picking plate (4-1) and the stem pulling roller (4-5).

2. The air-blown harvesting platform for reducing corn harvest losses according to claim 1, characterized in that: The adjusting device (4-3) comprises an adjusting device fixing frame (4-31), a spring rear fixing shaft (4-32), a spring housing (4-33), an adjusting spring (4-34), left and right adjusting device housings (4-35), a front fixing pin (4-36), a fixing screw (4-37), an upper and lower adjusting fixing pin (4-38), and an adjusting device shaft (4-39); the spring rear fixing shaft (4-32) fixes the adjusting device fixing frame (4-31) and the spring housing (4-33) to the adjusting device. The invention relates to a method for producing a seedling with an ear picking plate and a seedling frame, wherein the seedling picking plate is mounted on a shaft (4-39), an adjusting spring (4-34) is arranged in a spring housing (4-33), a left and right adjusting device housing (4-35) is arranged outside the spring housing (4-33), and a front fixing pin (4-36) is arranged at the tail end of the left and right adjusting device housing (4-35); the ear picking plate (4-1) is connected to the upper and lower adjusting fixing pins (4-38) through a fixing screw (4-37); and the adjusting device is connected to the frame (4-6) through an adjusting device fixing frame (4-31) and a fixing frame (4-4).

3. The air-blown harvesting platform for reducing corn harvest losses according to claim 2, characterized in that: The buffer device (4-8) comprises a buffer device rear cover (4-81), a buffer device support shell (4-82), a buffer device front cover (4-83), a buffer spring (4-84), and a button (4-85); the buffer device front cover (4-83) and the buffer device rear cover (4-81) are both transitionally matched with the buffer device support shell (4-82); the button (4-85) and the buffer device rear cover (4-81) are clearance-matched; one end of the buffer spring (4-84) is matched with a threaded groove inside the button (4-85), and the other end is in contact with an inner boss of the buffer device front cover (4-83); the buffer device rear cover (4-81), the buffer device support shell (4-82), the buffer device front cover (4-83), and the button (4-85) form a space with a length equal to the free length of the buffer spring (4-84).

4. The air-blown harvesting platform for reducing corn harvest losses according to claim 1, characterized in that: The front end of the straw divider (1-1) is semi-conical, and the rear end is semi-prismatic.

5. The air-blown harvesting platform for reducing corn harvest losses according to claim 1, characterized in that: The ratio of the number of the ear picking plates (4-1) to the number of the wind manifolds (3-3) is 1:

2.

6. The air-blown harvesting platform for reducing corn harvest losses according to claim 1, characterized in that: The nozzle device (3-4) comprises a first air nozzle (3-41), a second air nozzle (3-42), a third air nozzle (3-43), and a fourth air nozzle (3-44); the first air nozzle (3-41) and the fourth air nozzle (3-44) are on the same side, and the second air nozzle (3-42) and the third air nozzle (3-43) are on the same side; and the distances between the first air nozzle (3-41), the second air nozzle (3-42), the fourth air nozzle (3-44), and the third air nozzle (3-43) are all in a range of 50 to 70 mm.

7. The air-blown harvesting platform for reducing corn harvest losses according to claim 6, characterized in that: The included angles between the axes of the first air nozzle (3-41), the second air nozzle (3-42), the third air nozzle (3-43) and the fourth air nozzle (3-44) and the horizontal plane are 30° to 50°, and the included angles between the axes of the first air nozzle (3-41), the second air nozzle (3-42), the third air nozzle (3-43) and the fourth air nozzle (3-44) and the side plane are 10° to 30°.

8. The air-blown harvesting platform for reducing corn harvest losses according to claim 1, characterized in that: The distance between the two stem pulling rollers (4-5) in a symmetrical structure is 13-16 mm.

9. The air-blown harvesting platform for reducing corn harvest losses according to claim 1, characterized in that: The spacing between the two ear-picking plates (4-1) in a symmetrical structure can be adjusted within a range of 30 to 35 mm.

10. A method for using the air-blown harvesting platform for reducing corn harvest losses according to claim 3, characterized in that: When the harvester moves forward, the corn stalks are forced to separate into rows by the straw divider (1-1), and the stalks enter the suspended ear picking device with the support of the teeth (1-3). The stalks are introduced into the working section by the stem pulling roller (4-5). At the same time, due to the entry of the stalks and under the action of the adjusting device (4-3), the gap between the ear picking plates (4-1) increases, thereby improving the straw passing rate. The spacing limiting device (4-7) can only increase the spacing of the ear picking plates (4-1) to a pre-adjusted distance; under the action of the stem pulling roller (4-5), the stalks are pulled down, and then the diameter of the stalks gradually decreases. The adjusting device (4-3) gradually returns to its original state under the action of the adjusting spring (4-34); as the stem pulling roller (4-5) rotates, the stalks continue to move downward. Since the diameter of the ear is larger than the distance between the ear picking plates (4-1), the distance between the ear picking plates (4-1) increases. The distance between the corn ears and the ear picking plate (4-1) is greater than 100°, and the ear picking plate (4-1) moves downward with the corn ears under the action of the adjusting device (4-3). When the ear picking plate (4-1) contacts the buffer device (4-8), the buffer spring (4-84) is compressed under the action of the impact force. After the corn ears are picked, the buffer device (4-8) and the adjusting device (4-3) are restored, and the corn ears are sent to the auger conveying device under the action of the picking teeth (1-3); the kernels dropped due to the collision fall through the gap between the ear picking plates (4-1), and the airflow generated by the air-blowing auxiliary harvesting device is ejected through the nozzle device (3-4), blowing the dropped kernels onto the ear picking plate (4-1), and being pushed to the auger conveying device under the action of the picking teeth (1-3), or being directly blown to the auger conveying device under the action of the airflow.

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