Self-adapting mechanism for ear picking height of corn harvester

Abstract

This invention discloses an adaptive height adjustment mechanism for picking ears in a corn harvester. The picking roller is mounted on the rear frame and can slide up and down. It also includes a height adjustment component, which comprises a drive mechanism and a vision sensor. The vision sensor is located at the front of the picking roller, and the drive mechanism, mounted on the rear frame, adjusts the roller's vertical position. During use, the vision sensor detects changes in ground height. When a change is detected, a feedback signal triggers the drive mechanism to raise or lower the picking roller to adapt to the ground level. This invention uses a front-mounted vision sensor to detect ground height changes and then adjusts the picking roller's height in real time. This ensures the picking roller is at a suitable height while avoiding damage from impacts with the ground, preventing missed harvesting or ear erosion.

Description

Technical Field

[0001] This invention relates to an agricultural machinery device, and more specifically to an adaptive adjustment mechanism for the ear-picking height of a corn harvester. Background Technology

[0002] The existing corn harvester uses a cutting and picking structure where, after the corn stalks are fed into the feed channel, a cutting roller below chops the stalks and drags them downwards. The ears then detach from the chopped stalks and fall onto the picking roller plate, and are then transported to the subsequent collection mechanism. The cutting and picking structure has several picking units arranged in parallel, each with a fixed height. However, given that corn plants have different growth patterns (i.e., uneven crop height) and the terrain is uneven, traditional picking units are placed at relatively high positions to avoid collisions with undulating ground. But this can lead to problems such as missed harvesting or ears being gnawed. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide an adaptive adjustment mechanism for the ear-picking height of a corn harvester. This mechanism uses a front-mounted visual sensor to detect any changes in the ground height and then adjusts the height of the ear-picking rollers to ensure they are at a suitable height, thus preventing crop misses or ear nibbling.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a corn harvester ear-picking height adaptive adjustment mechanism, including an ear-picking roller plate, with a feeding channel formed in the middle of the ear-picking roller plate for the stalk to enter, and cutting rollers for cutting the stalk are arranged on both sides of the feeding channel below the ear-picking roller plate. As the stalk enters the feeding channel and moves towards the output end, the pair of cutting rollers rotate to drag the stalk downward and continuously cut the stalk. When the ears on the stalk descend to the ear-picking roller plate, they are blocked and output to the output end. The ear-picking roller plate is slidably mounted on the rear frame and also includes a height adjustment component. The height adjustment component includes a drive mechanism and a vision sensor. A vision sensor is arranged at the front of the ear-picking roller plate, and the drive mechanism is arranged on the rear frame to drive the ear-picking roller plate to adjust its vertical position. When in use, the vision sensor detects whether there is a change in the height of the ground in front. When there is a change in height, a feedback signal is sent to the drive mechanism to make the ear-picking roller plate rise or fall to the corresponding height to adapt to the ground height.

[0005] As an improvement, the usage of the adaptive adjustment mechanism for ear-picking height in corn harvesters includes: S1: Set the initial height of the picking roller plate above the ground; S2: The drive unit moves towards the planted corn, and the vision sensor detects whether there are any changes in the ground height ahead; S3: When there is a change in height, a feedback signal is sent to the drive mechanism to make the picking rollers rise or fall to the corresponding height to adapt to the ground height.

[0006] As an improvement, the drive mechanism includes a drive motor, a drive gear, and a drive rack. The drive rack is vertically mounted on the ear-picking roller plate. The drive motor is connected to the drive gear, and the drive gear meshes with the drive rack for transmission. When the drive motor starts, it rotates forward or backward, thereby driving the ear-picking roller plate to rise or fall.

[0007] As an improvement, the picking rollers are arranged in multiple sets at intervals on a horizontal track, and the height and position of the multiple sets of picking rollers are adjusted by their respective height adjustment components.

[0008] As an improvement, a telescopic cutting assembly is also included. The telescopic cutting assembly includes a cutting blade, a first force sensor, and a second force sensor. The ear-picking roller plate includes an upper plate and a lower plate arranged vertically. Several first force sensors are spaced upward along the conveying direction on both sides of the upper plate of the feeding channel. Several second force sensors are spaced upward along the conveying direction on both sides of the lower plate of the feeding channel. The positions of the first force sensors and the second force sensors correspond one-to-one vertically. The cutting blades are arranged in pairs between the upper plate and the cutting roller and can be telescopic to move towards the feeding channel. As the stalk enters the feeding channel and moves towards the output end, the stalk touches the second force sensor to detect the force value. When the first force sensor above the second force sensor detects the force value and the force value exceeds a predetermined value, the feedback signal drives the cutting blade to move towards the feeding channel once to cut the ear stalk and stalk.

[0009] As an improvement, the usage of the adaptive adjustment mechanism for ear-picking height in corn harvesters also includes: S4: The movement of the equipment causes the corn stalks to enter the feed channel; S5: The rotating cutting roller cuts the corn stalks and drags them downwards to continue cutting the stalks; S6: The second force sensor on the side detects the force value when the stem touches it, thus determining the position of the stem; S7: When the first force sensor above the second force sensor detects a force value and the force value exceeds a predetermined value, it is determined that the corn ear has come into contact with the first force sensor. The feedback signal drives the cutting blade to move into the feed channel once to cut the ear stalk and stem. S8: The cut ears of fruit are supported by the upper plate and output to the output end.

[0010] As an improvement, the cutting blade is located between the upper plate and the lower plate.

[0011] As an improvement, the cutting blade is driven to move by a telescopic power mechanism, which includes a cylinder, a linkage gear assembly, and an inclined push block. The cylinder is arranged in a front-to-back orientation, and the cylinder shaft, linkage gear assembly, and inclined push block are connected in sequence. When the cylinder reciprocates, it drives the inclined push block to move back and forth. The rear of the cutting blade is equipped with a push roller that cooperates with the inclined push block. The inclined surface of the inclined push block pushes the push roller toward the feed channel. The cutting blade is also connected to an elastic element. When the cutting blade is pushed out, the elastic element deforms and stores force. When the inclined push block returns to its original position, the cutting blade is quickly reset by the release of elastic force from the elastic element.

[0012] As an improvement, the linkage gear set includes a first rack, a gear, and a second rack. The first rack and the second rack are arranged in parallel and are meshed and driven by the gear. The first rack is connected to the cylinder shaft of the cylinder, and a slanted push block is provided on the second rack.

[0013] As an improvement, two sets of inclined push blocks are arranged on the second rack; two sets of elastic elements are arranged at the front and rear positions of the cutting blade; and rails or sliding grooves are provided on both sides of the cutting blade for reciprocating sliding engagement.

[0014] The beneficial effects of this invention are as follows: by using a visual sensor at the front to detect whether there is a change in the height of the ground in front, the height of the picking roller is adjusted in real time. This ensures that the picking roller is at a suitable height while avoiding collisions and damage to the ground, thus preventing problems such as missed harvesting or nibbling of the ears of crop. Attached Figure Description

[0015] Figure 1 This is a top view of the structure of the present invention.

[0016] Figure 2 This is a longitudinal cross-sectional view of the telescopic cutting assembly of the present invention.

[0017] Figure 3 This is a schematic diagram of the telescopic power mechanism of the present invention.

[0018] Figure 4 This is a three-dimensional structural diagram of a picking roller in the prior art.

[0019] In the diagram: 1. Harvesting roller; 101. Upper plate; 102. Lower plate; 11. Feed channel; 12. Cutting roller; 2. Telescopic cutting assembly; 21. Cutting blade; 211. Push roller; 212. Elastic element; 22. First force sensor; 23. Second force sensor; 3. Telescopic power mechanism; 31. Cylinder; 32. Linkage gear assembly; 321. First rack; 322. Gear; 323. Second rack; 33. Inclined push block; 4. Rear frame; 5. Height adjustment assembly; 51. Drive mechanism; 511. Drive motor; 512. Drive gear; 513. Drive rack; 52. Vision sensor. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] like Figure 1 , 2 Figures 3 and 4 show specific embodiments of the adaptive adjustment mechanism for ear-picking height of the corn harvester of the present invention. The figures only illustrate the mutual cooperation between the structures. The position and size ratio of the specific structures can be reasonably adjusted according to the actual product situation, and do not limit the scope of protection of the present invention.

[0022] The specific embodiment includes a picking roller plate 1, with a feeding channel 11 formed in the middle of the picking roller plate 1 for the stalks to enter. Cutting rollers 12 for cutting the stalks are arranged on both sides of the feeding channel 11 below the picking roller plate 1. As the stalks enter the feeding channel 11 and move towards the output end, the pair of cutting rollers 12 rotate to drag the stalks downward and continuously cut the stalks. When the ears of fruit on the stalks descend to the picking roller plate 1, they are blocked and output to the output end. The picking roller plate 1 is slidably mounted on the rear frame 4 and also includes a height adjustment component 5. The height adjustment component 5 includes a drive mechanism 51 and a vision sensor 52. The vision sensor 52 is arranged at the front of the picking roller plate 1, and the drive mechanism 51 is arranged on the rear frame 4 to drive the picking roller plate 1 to adjust its vertical position. When in use, the vision sensor 52 detects whether there is a change in the height of the ground in front. When there is a change in height, a feedback signal is sent to the drive mechanism 51 to make the picking roller plate 1 rise or fall to the corresponding height to adapt to the ground height.

[0023] The usage of the adaptive adjustment mechanism for ear-picking height on a corn harvester includes: S1: Set the initial height of the picking roller 1 above the ground; S2: The drive unit moves towards the planted corn, and the vision sensor 52 detects whether there is a change in the ground height ahead; S3: When there is a change in height, the feedback signal causes the drive mechanism 51 to work, causing the picking roller 1 to rise or fall to the corresponding height to adapt to the ground height.

[0024] In use, the user drives a corn harvester to the corresponding corn plant. The front cutting and ear-picking structure of the corn harvester has several parallel ear-picking units, each with an ear-picking roller 1 as described above. Multiple sets of ear-picking rollers 1 are arranged at intervals in the horizontal direction, and their height positions are adjusted by their respective height adjustment components 5. A vision sensor 52 at the front of the ear-picking roller 1 detects any changes in ground height. When a change in height occurs, such as the presence of debris, the vision sensor 52 detects it and, based on the height of the debris, sends a feedback signal to activate the drive mechanism 51, driving the ear-picking roller 1 to rise to the corresponding height. This avoids the ear-picking roller 1 hitting debris if the initial height is set too low. After the ear-picking roller 1 passes the debris, it is lowered back to the initial height, ensuring it reaches the corn stalk at a lower position for cutting, thus preventing missed harvesting or ear-biting. In practical applications, each picking roller plate 1 can be initially set at a lower position to improve the efficiency of stalk cutting and collection and avoid the problems of missed picking or ear biting. Each picking roller plate 1 can be independently detected and adjusted in height. Therefore, there is no need to perform linkage adjustment of height at the picking roller plate 1 where there are no debris. This improves the flexibility of independent height adjustment of each picking roller plate 1 and reduces the equipment wear and energy loss caused by frequent overall operation.

[0025] As an improved specific implementation, the drive mechanism 51 includes a drive motor 511, a drive gear 512 and a drive rack 513. The drive rack 513 is vertically arranged on the ear-picking roller plate 1. The drive motor 511 is connected to the drive gear 512. The drive gear 512 meshes with the drive rack 513 for transmission. When the drive motor 511 is started, it rotates forward or reverses, thereby driving the ear-picking roller plate 1 to rise or fall.

[0026] like Figure 1 As shown, the drive motor 511 can specifically be a servo motor, thereby precisely controlling the lifting and lowering of the picking roller plate 1. It can flexibly rise or fall by rotating forward or backward. Specifically, it is configured with a drive gear 512 and a drive rack 513 meshing transmission to ensure transmission stability and maintain accurate displacement distance during reciprocating motion. The picking roller plate 1 can be stably mounted on the rear frame 4 of the equipment via a track structure for lifting and adjustment.

[0027] As an improved specific implementation, it also includes a telescopic cutting assembly 2, which includes a cutting blade 21, a first force sensor 22, and a second force sensor 23. The picking roller plate 1 includes an upper plate 101 and a lower plate 102 arranged vertically. The upper plate 101 has several first force sensors 22 spaced upwards along the conveying direction on both sides of the feeding channel 11. The lower plate 102 has several second force sensors 23 spaced upwards along the conveying direction towards the feeding channel 11 on both sides of the feeding channel 11. The positions of the force sensors 23 are aligned vertically. The cutting blades 21 are arranged in pairs between the upper plate 101 and the cutting roller 12 and can extend and retract to move towards the feed channel 11. As the stalk enters the feed channel 11 and moves towards the output end, the stalk touches the second force sensor 23 to detect the force value. When the first force sensor 22 above the second force sensor 23 detects the force value and the force value exceeds a predetermined value, the feedback signal drives the cutting blade 21 to move towards the feed channel 11 to cut the ear stalk and stalk.

[0028] The usage of the adaptive adjustment mechanism for ear-picking height on a corn harvester also includes: S4: The equipment travels forward, causing the corn stalks to enter the feed channel 11; S5: The rotating cutting roller 12 cuts the corn stalks and drags the stalks downwards to continue cutting the stalks; S6: The stem touches the second force sensor 23 on the side, detects the force value, and determines the position of the stem; S7: When the first force sensor 22 above the second force sensor 23 detects the force value and the force value exceeds the predetermined value, it is determined that the corn ear has come into contact with the first force sensor 22. The feedback signal drives the cutting blade 21 to move into the feed channel 11 once to cut the ear stalk and stem. S8: The cut ear of fruit is supported by the upper plate 101 and output to the output end.

[0029] Existing corn harvesters use a cutting and picking structure where, after the corn stalks are fed into the feed channel, a cutting roller below chops the stalks and drags them downwards. The ears then detach from the chopped stalks and fall onto the picking roller plate before being transported to subsequent collection mechanisms. However, this structure involves a forced pulling action on the stalks after the ears descend to the picking roller plate, which poses a risk of damage to the ears and affects harvest quality. Therefore, it is necessary to optimize the structure to protect the corn ears and reduce damage to the corn.

[0030] like Figure 1 , 2As shown, to address the squeezing damage to the ears caused by the forced pulling and separation of the ears and stalks, a retractable cutting blade 21 is installed to actively cut between the ears and stalks at appropriate times, thereby avoiding squeezing damage to the ears and ensuring ear quality. Firstly, several first force sensors 22 installed on the upper plate 101 can detect the force at each conveying position; simultaneously, several second force sensors 23 installed on the lower plate 102 can detect the presence of the stalk at each conveying position. When a first force sensor 22 detects a force exceeding a predetermined value at a certain location, and a corresponding second force sensor 23 detects the force, it indicates that the corn ear at that location is being pulled downwards. This triggers a feedback signal to activate the cutting blade 21, which moves towards the feed channel 11 to cut the ear stalk and stalk, achieving active cutting and separation of the ear stalk. This avoids continuous downward pulling of the corn ear, allowing the ear to separate from the stalk more smoothly and without damage. After the ears of corn separate from the stalks, they fall onto the upper plate 101 and continue to be transported to the output end. Subsequently, the first force sensor 22 detects the ears being transported backwards. Since the contact between these ears and the first force sensor 22 does not exceed a predetermined value, the telescopic cutting action is not triggered. On the other hand, due to the time difference between plant input and forward / backward transport, and the complexity of the plant, there may be accumulation of corn ears or scattered debris and stalks falling onto the upper plate 101. This may cause the instantaneous resistance force to exceed the predetermined value set by the first force sensor 22. In this case, the second force sensor 23... This configuration ensures that the aforementioned error will not trigger the telescopic cutting action. Even if the first force sensor 22 exceeds the predetermined value, the corresponding second force sensor 23 cannot detect the presence of a stalk causing contact and generating force. Since there is no stalk at that point, the detected force is not caused by the contact during corn-stalk separation, thus preventing the telescopic cutting action from being triggered. This ensures that during non-corn ear separation, the stalks in the entire feed channel 11 can be smoothly and continuously pulled down and cut by the cutting roller 12, reducing equipment wear and energy consumption caused by frequent cutting blade 21 movements. By setting multiple force sensors at intervals along the corn conveying direction, full coverage of the sensing function is achieved. Furthermore, the use of force sensors at both the top and side positions avoids misjudgments caused by the force generated when corn falls onto the upper plate 101 after harvesting, or by the force generated when fragmented stalks or debris fall onto the upper plate 101, improving the accuracy of the telescopic cutting.

[0031] As an improved specific implementation, the cutting blade 21 is located between the upper plate 101 and the lower plate 102.

[0032] like Figure 2As shown, the cutting blade 21 is positioned close to the upper plate 101, making the cutting position closer to the ear stalk, reducing stalk residue on the ear, and reducing the difficulty of subsequent ear processing. The lower plate 102 serves two purposes: it houses the second force sensor 23 and it blocks the lower cutting roller 12, effectively preventing crushed stalks or debris from the ground from contaminating or affecting the telescopic cutting assembly 2.

[0033] As an improved specific implementation, the cutting blade 21 is driven to move by a telescopic power mechanism 3. The telescopic power mechanism 3 includes a cylinder 31, a linkage gear group 32, and an inclined push block 33. The cylinder 31 is arranged in a front-to-back orientation. The cylinder shaft of the cylinder 31, the linkage gear group 32, and the inclined push block 33 are connected in sequence. When the cylinder 31 performs reciprocating motion, it drives the inclined push block 33 to move back and forth. The rear of the cutting blade 21 is provided with a push roller 211 that cooperates with the inclined push block 33. The inclined surface of the inclined push block 33 pushes the push roller 211 toward the feed channel 11. The cutting blade 21 is also connected to an elastic element 212. The elastic element 212 deforms and stores force when the cutting blade 21 is pushed out. When the inclined push block 33 is reset, the cutting blade 21 releases the elastic force by the elastic element 212 to quickly reset.

[0034] The linkage gear set 32 ​​includes a first rack 321, a gear 322, and a second rack 323. The first rack 321 and the second rack 323 are arranged in parallel and are meshed and driven by the gear 322. The first rack 321 is connected to the cylinder shaft of the cylinder 31, and the second rack 323 is provided with a slanted push block 33.

[0035] like Figure 1 As shown, the ear-picking roller plate 1 has a relatively long front-to-back length. However, in order to adapt to the current planting spacing of corn, its width is relatively small. Therefore, the setting of the telescopic power mechanism 3 needs to make reasonable use of the space in the front-to-back direction to avoid the problem of the small width.

[0036] like Figure 2 , 3As shown, utilizing the spatial advantage in the front-to-back direction, a cylinder 31 is set up to transmit power through the back-to-back movement of the cylinder shaft; the linkage gear assembly 32 is specifically configured as a first rack 321, a gear 322, and a second rack 323 meshing sequentially, wherein the gear 322 is rotated through a shaft structure, and the first rack 321 and the second rack 323 on both sides parallel to each other realize the reciprocating motion of the cylinder 31 on the inclined push block 33; the inclined surface of the inclined push block 33 pushes the push roller 211 perpendicular to the direction of movement of the inclined push block 33, thereby driving the cutting blade 21 out to complete the cutting action of the stem. When the inclined push block 33 is reset, the push roller 211 and the cutting blade 21 are not linked with the inclined push block 33, but are quickly reset by releasing the elastic force through the elastic element 212. The overall action is smooth and stable, and the cutting blade 21 does not have a rigid connection state. When the stem or debris in the feed channel 11 comes into contact with the cutting blades 21 on both sides, the cutting blade 21 has the flexibility to float back and forth, which can reduce the possibility of damage to the cutting blade 21.

[0037] As an improved specific implementation, the inclined push block 33 is arranged in two sets on the second rack 323; the elastic element 212 is arranged in two sets at the front and rear positions of the cutting blade 21; and the cutting blade 21 is provided with rails or sliding grooves on both sides for reciprocating sliding cooperation.

[0038] like Figure 3 As shown, the cutting blade 21 itself has a large span, and two sets of inclined push blocks 33 can be set at the front and rear positions to push the cutting blade 21, thereby improving the stability of the cutting blade 21 in pushing out and cutting; two sets of elastic elements 212 are set at the front and rear positions to elastically limit and reset the cutting blade 21, thereby improving the stability of the reciprocating motion of the cutting blade 21; a track or sliding groove is set to set the cutting blade 21, thereby improving the stability of the movement of the cutting blade 21.

[0039] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A corn harvester ear-picking height adaptive adjustment mechanism, comprising an ear-picking roller plate (1), wherein a feeding channel (11) for stalks to enter is formed in the middle of the ear-picking roller plate (1), and cutting rollers (12) for cutting stalks are arranged on both sides of the feeding channel (11) below the ear-picking roller plate (1). During the process of the stalks entering the feeding channel (11) and moving towards the output end, the pair of cutting rollers (12) rotate to drag the stalks downward and continuously cut the stalks. When the ears on the stalks descend to the ear-picking roller plate (1), they are blocked and output to the output end; characterized in that: The picking roller plate (1) is mounted on the rear frame (4) and can slide up and down. It also includes a height adjustment component (5). The row adjustment component (5) includes a drive mechanism (51) and a vision sensor (52). The vision sensor (52) is set at the front of the picking roller plate (1). The drive mechanism (51) is set on the rear frame (4) to drive the picking roller plate (1) to adjust its position up and down. When in use, the vision sensor (52) detects whether there is a change in the height of the ground in front. When there is a change in the height, the feedback signal causes the drive mechanism (51) to work and make the picking roller plate (1) rise or fall to the corresponding height to adapt to the ground height.

2. The adaptive adjustment mechanism for ear-picking height of a corn harvester according to claim 1, characterized in that: The method of using the adaptive adjustment mechanism for ear-picking height of the corn harvester includes: S1: Set the initial height of the picking roller (1) from the ground; S2: The drive device moves toward the planted corn, and the vision sensor (52) detects whether there is a change in the ground height in front; S3: When there is a change in height, the feedback signal causes the drive mechanism (51) to work and causes the picking roller (1) to rise or fall to the corresponding height to adapt to the ground height.

3. The adaptive adjustment mechanism for ear-picking height of a corn harvester according to claim 2, characterized in that: The drive mechanism (51) includes a drive motor (511), a drive gear (512), and a drive rack (513). The drive rack (513) is vertically mounted on the ear-picking roller plate (1). The drive motor (511) is connected to the drive gear (512). The drive gear (512) meshes with the drive rack (513) for transmission. When the drive motor (511) starts, it rotates forward or backward, thereby driving the ear-picking roller plate (1) to rise or fall.

4. The adaptive adjustment mechanism for ear-picking height of a corn harvester according to claim 3, characterized in that: The picking rollers (1) are multiple sets arranged at intervals on the horizontal track (4), and the height position of the multiple sets of picking rollers (1) is adjusted by their respective height adjustment components (5).

5. The adaptive adjustment mechanism for ear-picking height of a corn harvester according to claim 2, 3, or 4, characterized in that: It also includes a telescopic cutting assembly (2), which includes a cutting blade (21), a first force sensor (22), and a second force sensor (23). The picking roller plate (1) includes an upper plate (101) and a lower plate (102) arranged vertically. The upper plate (101) has several first force sensors (22) spaced upward along the conveying direction on both sides of the feeding channel (11). The lower plate (102) has several second force sensors (23) spaced upward along the conveying direction towards the feeding channel (11) on both sides of the feeding channel (11). The first force sensors (22) and The positions of the second force sensor (23) are one-to-one correspondences between the upper and lower parts. The cutting blades (21) are arranged in pairs between the upper plate (101) and the cutting roller (12) and can be extended and retracted to move towards the feed channel (11). When the stalk enters the feed channel (11) and moves towards the output end, the stalk touches the second force sensor (23) to detect the force value. When the first force sensor (22) above the second force sensor (23) that detects the force value detects the force value and the force value exceeds the predetermined value, the feedback signal drives the cutting blade (21) to move towards the feed channel (11) once to cut the ear stalk and stalk.

6. The adaptive adjustment mechanism for ear-picking height of a corn harvester according to claim 5, characterized in that: The method of using the adaptive adjustment mechanism for ear-picking height of the corn harvester also includes: S4: The movement of the equipment causes the corn stalks to enter the feed channel (11); S5: The rotating cutting roller (12) cuts the corn stalk and drags the stalk downward to continue cutting the stalk; S6: The stem touches the second force sensor (23) on the side and detects the force value to determine the position of the stem; S7: When the first force sensor (22) above the second force sensor (23) that detects the force value detects the force value and the force value exceeds the predetermined value, it is determined that the corn ear has come into contact with the first force sensor (22), and the feedback signal drives the cutting blade (21) to move into the feed channel (11) once to cut the ear stalk and stem. S8: The cut ear of fruit is supported by the upper plate (101) and output to the output end.

7. The adaptive adjustment mechanism for ear-picking height of a corn harvester according to claim 6, characterized in that: The cutting blade (21) is located between the upper plate (101) and the lower plate (102).

8. The adaptive adjustment mechanism for ear-picking height of a corn harvester according to claim 6, characterized in that: The cutting blade (21) is driven to move by a telescopic power mechanism (3). The telescopic power mechanism (3) includes a cylinder (31), a linkage gear group (32), and an inclined push block (33). The cylinder (31) is arranged in a front-to-back orientation. The cylinder shaft of the cylinder (31), the linkage gear group (32), and the inclined push block (33) are connected in sequence. When the cylinder (31) is reciprocating, it drives the inclined push block (33) to move back and forth. The rear of the cutting blade (21) is provided with a push roller (211) that cooperates with the inclined push block (33). The inclined surface of the inclined push block (33) pushes the push roller (211) toward the feed channel (11). The cutting blade (21) is also connected to an elastic element (212). The elastic element (212) deforms and stores force when the cutting blade (21) is pushed out. When the inclined push block (33) is reset, the cutting blade (21) is quickly reset by the elastic force released by the elastic element (212).

9. The adaptive adjustment mechanism for ear-picking height of a corn harvester according to claim 8, characterized in that: The linkage gear set (32) includes a first rack (321), a gear (322), and a second rack (323). The first rack (321) and the second rack (323) are arranged in parallel and mesh with each other through the gear (322). The first rack (321) is connected to the cylinder shaft of the cylinder (31), and the second rack (323) is provided with a slanted push block (33).

10. The adaptive adjustment mechanism for ear-picking height of a corn harvester according to claim 9, characterized in that: Two sets of inclined push blocks (33) are arranged on the front and back of the second rack (323); two sets of elastic elements (212) are arranged at the front and back positions of the cutting blade (21); and tracks or sliding grooves are provided on both sides of the cutting blade (21) for reciprocating sliding cooperation.

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