Forage harvesting header profiling detection mechanism

Abstract

The invention provides a profiling detection mechanism of a pasture harvesting header, and relates to the technical field of pasture harvesting. The profiling detection mechanism of the pasture harvesting header comprises a second detection mechanism, the second detection mechanism comprises a supporting frame, a plurality of connecting rods are fixedly arranged on one side of the supporting frame, a plurality of profiling rods are fixedly arranged on the sides, close to the outside, of the connecting rods at equal intervals, and the profiling rods simulate human fingers to simply separate pasture; a supporting cylinder is fixedly arranged in the middle of the interior of the supporting frame, and a meshing block is fixedly arranged at the top of the interior of the supporting cylinder. The plurality of profiling rods are connected to the same connecting rod to form a group, and in one group of the plurality of groups of profiling rods, ultrasonic detectors are arranged in every other group of profiling rods; and the first detection mechanism and the second detection mechanism are the same in structure and are symmetrical. The distance between the profiling rods can be dynamically adjusted according to the forage density, detection is free of blind areas, the structure is stable and resistant to deformation, the harvesting efficiency and the forage utilization rate are improved, and energy consumption and equipment damage can be reduced.

Description

Technical Field

[0001] This invention relates to the field of forage harvesting technology, specifically to a forage harvesting cutter contour detection mechanism. Background Technology

[0002] In forage harvesting operations, the harvesting header, as a core executing component, directly affects harvesting efficiency and forage integrity due to its compatibility with the forage. Existing forage harvesting headers typically feature contoured structures with fixed intervals to guide the forage into the header and assist in the cutting and conveying process. However, in actual harvesting scenarios, forage growth density varies significantly. For example, in areas with abundant water and fertilizer, forage grows densely with small spacing between individual plants, while in arid or infertile areas, forage grows sparsely with large spacing between individual plants. Fixed-spacing contouring structures are ill-suited to the aforementioned density differences: when dealing with high-density forage, fixed spacing can cause congestion as the forage enters the header, increasing the header load and even leading to forage entanglement in the contouring components, thus reducing harvest continuity; when dealing with low-density forage, fixed spacing cannot effectively gather the scattered forage, and some forage can easily leak out from the gaps in the contouring structure, resulting in harvest losses. Meanwhile, existing detection mechanisms mostly lack the ability to sense pasture density in real time, making it impossible to dynamically adjust structural parameters according to the actual pasture conditions on site. Some mechanisms with adjustment functions require manual intervention, which is cumbersome and slow to respond, making it difficult to meet the needs of large-scale, high-efficiency pasture harvesting operations. Furthermore, traditional contour-following structures lack sufficient support stability and are prone to deformation due to vibration or load during long-term operation, further affecting detection accuracy and guidance effectiveness, thus limiting the quality of pasture harvesting and the lifespan of the equipment. Summary of the Invention

[0003] Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a forage harvesting header contour detection mechanism, which solves the problems of traditional header contour detection mechanisms having fixed spacing, being unable to adapt to changes in forage density leading to congestion or leakage, and having many blind spots and easily deformable structures.

[0004] Technical solution To achieve the above objectives, the present invention provides the following technical solution: a forage harvesting platform contour detection mechanism, comprising: The second detection mechanism includes a support frame, on one side of which multiple connecting rods are fixedly arranged. On the side of the multiple connecting rods near the outside, multiple contour rods are fixedly arranged at equal intervals. The multiple contour rods imitate human fingers to simply separate the grass. A support cylinder is fixedly arranged in the middle of the inside of the support frame, and an engagement block is fixedly arranged at the top of the inside of the support cylinder. Multiple contour rods connected to the same connecting rod form a group, and in one of the groups of contour rods, an ultrasonic detector is installed inside each of the groups that are spaced apart. The first detection mechanism has the same and symmetrical structure as the second detection mechanism. The two symmetrical connecting rods slide to each other, and the two close-to-each contour rods combine to form a complete cylinder. The positions of the ultrasonic detectors set in the two groups are staggered. An adjustment mechanism includes a support main shaft, an adjustment shaft rotatably mounted inside the support main shaft, adjustment threads at both ends of the adjustment shaft with opposite directions, the two adjustment threads respectively engaging with two meshing blocks, and a connecting flywheel fixedly mounted at one end of the adjustment shaft, the outer ring of the connecting flywheel driving the inner ring to rotate only when the outer ring rotates clockwise; An auxiliary motor is fixedly connected to the outer ring of the connecting flywheel. When the auxiliary motor drives the connecting flywheel to rotate clockwise, it will drive the adjusting shaft to rotate. The support connecting frame has two symmetrically arranged at both ends of the adjustment mechanism, including a drive motor. The drive motor has an output end located in the middle position inside, and the output end is fixedly connected to both ends of the support cylinder. The drive motor drives the adjustment mechanism, the first detection mechanism, and the second detection mechanism to rotate counterclockwise. The output end of the auxiliary motor remains stationary. When the output end of the auxiliary motor rotates clockwise, it drives the adjustment shaft to rotate. The adjustment shaft drives the two support frames to move in opposite directions, thereby causing the two sets of contour rods to be misaligned, reducing the spacing between the original equidistant contour rods.

[0005] Preferably, two support rods are fixedly provided on one side of each drive motor, and a connecting block is fixedly provided at the other end of each of the two support rods, and multiple connecting blocks are connected to the harvesting table.

[0006] Preferably, multiple connecting posts are fixedly provided on opposite sides of the two drive motors, and one side of the auxiliary motor is fixed to one side of the drive motor by a set of connecting posts.

[0007] Preferably, a plurality of inner support frames are slidably arranged between the second detection mechanism and the adjustment mechanism, and the plurality of inner support frames support the second detection mechanism to reduce deformation.

[0008] Preferably, the supporting spindle is hollow inside and has a groove at its upper end, and the meshing block is slidably disposed inside the groove.

[0009] Preferably, the two drive motors are hollow at their internal center positions, and the two ends of the adjustment shaft extend through the interior to the exterior.

[0010] Beneficial effects This invention provides a contour-following detection mechanism for forage harvesting headers. It has the following beneficial effects: 1. This invention provides a contour-following detection mechanism for a forage harvesting cutter. This mechanism utilizes staggered ultrasonic detectors embedded in the contour-following rods, combined with a symmetrical structure of a first and second detection mechanism, to achieve real-time and accurate sensing of forage density in the area passing through the contour-following rods. Based on the density sensing results, an adjustment mechanism can drive the two sets of contour-following rods to move in a staggered manner, dynamically changing the spacing between the rods to adapt the spacing to the forage density: in high-density forage scenarios, a smaller spacing avoids forage congestion, ensuring smooth forage entry into the cutter; in low-density forage scenarios, a reasonable adjustment of the spacing effectively gathers the forage, reducing loss. This design significantly improves the mechanism's adaptability to different forage densities, optimizes the continuity and integrity of harvesting operations, and reduces harvest loss rates.

[0011] 2. This invention provides a contour-following detection mechanism for a forage harvesting cutter. This mechanism uses a drive motor on a supporting connecting frame to provide rotational power, causing the first detection mechanism, the second detection mechanism, and the adjustment mechanism to rotate counter-clockwise as a whole, providing directional guidance for forage entering the cutter. An auxiliary motor, in conjunction with a unidirectional transmission flywheel, ensures that the adjustment shaft rotates only when the auxiliary motor rotates clockwise, avoiding abnormal spacing caused by unintended adjustments. Simultaneously, the sliding limit of the internal groove of the supporting main shaft on the meshing block, and the support of the inner support frame for the second detection mechanism, significantly enhance the overall structural stability of the mechanism, reduce deformation caused by vibration or load during operation, ensure detection accuracy and adjustment reliability, extend equipment lifespan, and reduce maintenance costs. Attached Figure Description

[0012] Figure 1 This is an isometric view of the present invention; Figure 2 This is an axonometric schematic diagram of the second detection mechanism of the present invention; Figure 3 This is an isometric view of the support frame of the present invention; Figure 4 This is a schematic diagram of the adjusting mechanism of the present invention from an isometric perspective. Figure 5 This is a partial isometric view of the adjustment mechanism of the present invention.

[0013] The components include: 1. First detection mechanism; 2. Second detection mechanism; 3. Support connecting frame; 4. Auxiliary motor; 5. Adjustment mechanism; 6. Inner support frame; 201. Support frame; 202. Support cylinder; 203. Engaging block; 204. Connecting rod; 205. Contouring rod; 301. Connecting block; 302. Support rod; 303. Drive motor; 304. Connecting column; 305. Output end; 501. Support spindle; 502. Adjustment shaft; 503. Adjustment thread; 504. Connecting flywheel. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] like Figure 1-5 As shown, this embodiment of the invention provides a contour-following detection mechanism for a forage harvester, comprising: The second detection mechanism 2 includes a support frame 201. A plurality of connecting rods 204 are fixedly arranged on one side of the support frame 201. A plurality of contour rods 205 are arranged at equal intervals on the side of the plurality of connecting rods 204 near the outside. The plurality of contour rods 205 imitate human fingers to simply separate the grass. A support cylinder 202 is fixedly arranged in the middle position inside the support frame 201. A meshing block 203 is fixedly arranged at the top inside the support cylinder 202. Among the multiple contour rods 205, those connected to the same connecting rod 204 form a group. In one of the multiple groups of contour rods 205, an ultrasonic detector is installed inside each of the groups that are spaced apart. The first detection mechanism 1 has the same and symmetrical structure as the second detection mechanism 2. The two symmetrical connecting rods 204 are slidably connected to each other, and the two closely spaced contour rods 205 are combined to form a complete cylinder. The positions of the ultrasonic detectors set in the two groups are staggered. Specifically, in the above-described embodiment, the support frame 201 serves as the basic load-bearing structure of the second detection mechanism 2. The connecting rods 204 form an orderly array of contour rods 205 for detection. The separation effect of the contour rods 205 prevents large-scale entanglement of the forage before it enters the cutter, providing stable conditions for subsequent density detection and transport. The symmetrical design of the first detection mechanism 1 and the second detection mechanism 2 allows the closely spaced contour rods 205 to form a complete cylindrical structure. This structure provides bidirectional wrapping guidance for the forage, reducing the probability of forage leakage through the detection gaps. The staggered distribution of the detectors fills the blind spots of a single detection mechanism, ensuring that every patch of forage within the detection area is covered by ultrasonic signals, improving the comprehensiveness of density detection. This symmetrical and staggered detection layout not only solves the problem of incomplete coverage in traditional single-group detection mechanisms but also enhances the guiding effect on the forage through the combined structure of the contour rods 205, laying the foundation for subsequent dynamic adjustment of the spacing.

[0016] The adjustment mechanism 5 includes a support spindle 501, an adjustment shaft 502 rotatably mounted inside the support spindle 501, and adjustment threads 503 at both ends of the adjustment shaft 502, with the two adjustment threads 503 in opposite directions. The two adjustment threads 503 are respectively engaged with two meshing blocks 203. A connecting flywheel 504 is fixedly mounted at one end of the adjustment shaft 502. When the outer ring of the connecting flywheel 504 rotates clockwise, it can drive the inner ring to rotate. The support spindle 501 is hollow inside and has a sliding groove at its upper end. The meshing blocks 203 are slidably mounted inside the sliding groove. Specifically, in the above-described embodiment, the core function of the adjusting mechanism 5 is to convert the rotational power of the auxiliary motor 4 into the relative movement of the first and second detection mechanisms. Its principle is based on the reverse thread design of the adjusting shaft 502: when the adjusting shaft 502 rotates, the opposing adjusting threads 503 at both ends exert opposite forces on the two meshing blocks 203, causing the meshing blocks 203 to synchronously move closer or further away along the groove of the supporting main shaft 501. The groove structure of the supporting main shaft 501 provides a stable sliding trajectory for the meshing blocks 203, preventing deviation during adjustment and ensuring the movement accuracy of the two sets of detection mechanisms. The unidirectional transmission characteristic of the connecting flywheel 504 prevents unintended adjustment—when the auxiliary motor 4 rotates in the opposite direction, the outer ring cannot drive the inner ring and the adjusting shaft 502 to rotate, thereby locking the current spacing of the contour rod 205 and preventing abnormal spacing due to motor malfunction during operation, ensuring the stability of detection and conveying. This adjustment principle achieves dynamic controllability of the spacing and improves the safety of the mechanism's operation through the unidirectional transmission design, adapting to the complex working conditions required in harvesting operations.

[0017] The auxiliary motor 4 is fixedly connected to the outer ring of the connecting flywheel 504. When the auxiliary motor 4 drives the connecting flywheel 504 to rotate clockwise, it will drive the adjusting shaft 502 to rotate. Specifically, in the above embodiment, the auxiliary motor 4 serves as the adjustment power source, and its operation is controlled by the density signal fed back by the ultrasonic detector, forming a closed-loop control logic of "detection-judgment-adjustment": when the detector detects that the forage density is too high, the control module triggers the auxiliary motor 4 to rotate clockwise, driving the adjustment shaft 502 through the connecting flywheel 504, thereby reducing the spacing of the contour rods 205 and preventing high-density forage from clogging; when the density decreases and no adjustment is needed, the motor stops running, and the spacing remains stable. The cooperation between the auxiliary motor 4 and the connecting flywheel 504 ensures that the adjustment action is initiated only when needed, reducing ineffective energy consumption. At the same time, the power output by the motor is more stable after being transmitted through the flywheel, preventing damage to the adjustment shaft 502 due to instantaneous impact. This dynamic adjustment method based on density signals breaks the limitations of traditional fixed-spacing mechanisms, enabling the detection mechanism to adapt to changes in forage density in real time, improving the flexibility and efficiency of harvesting operations.

[0018] The support connecting frame 3 has two symmetrically arranged at both ends of the adjustment mechanism 5, including a drive motor 303. The drive motor 303 has an output end 305 located in the middle position inside. The output end 305 is fixedly connected to both ends of the support cylinder 202. Two support rods 302 are fixedly arranged on one side of each drive motor 303. A connecting block 301 is fixedly arranged on the other end of each of the two support rods 302. Multiple connecting blocks 301 are connected to the harvesting platform. Multiple connecting columns 304 are fixedly arranged on opposite sides of the two drive motors 303. One side of the auxiliary motor 4 is fixed to one side of the drive motor 303 through a set of connecting columns 304. The interior center of the two drive motors 303 is hollow, and both ends of the adjustment shaft 502 pass through its interior to the outside. Among them, the drive motor 303 drives the adjustment mechanism 5, the first detection mechanism 1 and the second detection mechanism 2 to rotate counterclockwise, the output end 305 of the auxiliary motor 4 remains stationary, and when the output end 305 of the auxiliary motor 4 rotates clockwise, it drives the adjustment shaft 502 to rotate. The adjustment shaft 502 drives the two support frames 201 to move in opposite directions, thereby causing the two sets of contour rods 205 to be misaligned, reducing the spacing of the original equidistant contour rods 205. Specifically, in the above-described embodiment, the support connecting frame 3 undertakes the functions of fixing the entire mechanism and transmitting power: through the connection of the connecting block 301 to the harvesting platform, the detection mechanism and the platform form a stable integrated structure, preventing the mechanism from shifting due to vibration during operation; the symmetrical distribution design of the support rods 302 can evenly distribute the weight of the mechanism and the working load, improving the overall structure's resistance to deformation. The drive motor 303 drives the detection mechanism and the adjustment mechanism to rotate counterclockwise through the output end 305. Its rotation direction is consistent with the direction in which the forage enters the platform, forming an active guiding force to promote the smooth entry of the forage into the area enclosed by the contour rod 205, reducing the accumulation of forage at the entrance. The hollow design inside the drive motor 303 provides a through space for the adjustment shaft 502, ensuring that the adjustment shaft 502 is not obstructed by the motor structure when rotating. At the same time, the connecting column 304 fixes the auxiliary motor 4, keeping the auxiliary motor 4 and the adjustment shaft 502 coaxial, ensuring power transmission efficiency. This structural design not only achieves stable assembly of the mechanism and the cutting platform, but also optimizes the guiding effect of the forage through rotational power, providing a guarantee for the coordinated operation of density detection and spacing adjustment.

[0019] Multiple inner support frames 6 are slidably arranged between the second detection mechanism 2 and the adjustment mechanism 5, and the multiple inner support frames 6 support the second detection mechanism 2 to reduce deformation; Specifically, in the above specific embodiments, the function of the inner support frame 6 is to strengthen the structural stability of the second detection mechanism 2. Its principle is based on the "multi-point support + follow-up sliding" design: the inner support frame 6 connects the second detection mechanism 2 and the adjustment mechanism 5. When the detection mechanism moves along with the adjustment shaft 502, the support frame can slide synchronously without affecting the adjustment action. At the same time, the support frame forms a vertical support for the support frame 201, dispersing the stress generated by the centrifugal force during the rotation of the support frame 201, and preventing the support frame 201 from bending or breaking. In the high-density forage operation scenario, the profiling rod 205 will be subjected to a large forage extrusion force. This force is transmitted to the support frame 201 through the connecting rod 204. The inner support frame 6 can effectively offset part of the force, preventing the deformation of the support frame 201 from causing abnormal spacing of the profiling rods 205 and ensuring the accuracy of density detection. This support design not only does not interfere with the core adjustment function of the mechanism but also significantly improves the anti-load capacity of the mechanism, extends the service life of the equipment, and ensures the stability of long-term operation.

[0020] In addition, the detailed principle of ultrasonic detection of forage density in this mechanism is as follows: The ultrasonic detector emits ultrasonic signals from the transmitting end to the forage area outside the profiling rod (205). After the ultrasonic signals encounter the forage, they are reflected and received by the receiving end. The distance between the detector and the forage surface is calculated based on the propagation time of the ultrasonic wave. The formula is: d=(c×t) / 2 Where d is the distance between the detector and the forage surface (unit: m), c is the propagation speed of ultrasonic waves in the air (340 m / s at room temperature), and t is the time from the emission to the reception of the ultrasonic wave (unit: s).

[0021] Since the positions of the ultrasonic detectors in the first detection mechanism (1) and the second detection mechanism (2) are staggered, and the detectors on the same connecting rod (204) are arranged at intervals, a grid-like detection point can be formed within the area enclosed by the profiling rods (205). This layout can cover every space within the detection area, avoiding density misjudgment caused by detection blind spots. Regarding the area corresponding to each detection point as a rectangular unit, based on the measured distance d of the detector and the length L of the profiling rod (205), the filling height h of the forage in the unit can be calculated as h = L - d (there is forage when d < L, and there is no forage when d ≥ L). Then, the unit volume can be obtained from the unit area and the filling height. The sum of all unit volumes is the total volume V of the forage within the detection area, V = ΣV0. Combining with the pre-measured stacking density ρ of the forage, the mass m of the forage within the detection area can be calculated as m = V×ρ. Finally, the forage density ρgrass = m / S is obtained through the total area S of the detection area, realizing quantitative detection. The advantages of this detection principle are: first, the staggered detection point design enhances the comprehensiveness of density detection, avoiding the limitations of traditional single-point detection; second, the non-contact detection based on ultrasound will not cause compression or damage to the forage, ensuring the quality of forage harvest; and third, the formulaic calculation achieves quantitative feedback of density, providing accurate numerical basis for spacing adjustment and avoiding subjective errors from manual judgment. The control module adjusts the spacing of the contour rods 205 according to the density of the grass (ρgrass). When ρgrass > 400 kg / m² (high density), the spacing is reduced to prevent congestion; when ρgrass < 200 kg / m² (low density), the spacing is maintained or restored to ensure a gathering effect, forming a "precise detection - dynamic adaptation" operation mode, significantly improving harvesting efficiency and forage utilization.

[0022] Working principle: When this mechanism is in operation, it is first fixed to the harvesting table through the connecting block 301 of the support connecting frame 3. After the drive motor 303 is started, its output end 305 drives the support cylinder 202 to rotate, thereby causing the first detection mechanism 1, the second detection mechanism 2 and the adjustment mechanism 5 to rotate in a counterclockwise direction, forming a directional guide for the forage and promoting the forage to gather in the area enclosed by the contour rod 205.

[0023] During this process, the ultrasonic detectors inside the contour rod 205 continuously operate: because the ultrasonic detectors in the first detection mechanism 1 and the second detection mechanism 2 are staggered, and the contour rods 205 on the same connecting rod 204 are spaced apart, comprehensive detection of the pasture passing through the contour rod 205 area can be achieved. The real-time pasture density is calculated based on the distance data fed back by the detectors. When a change in pasture density is detected, the auxiliary motor 4 starts and drives the connecting flywheel 504 to rotate clockwise. The inner ring of the connecting flywheel 504 rotates synchronously with the outer ring, thereby driving the adjusting shaft 502 to rotate. The reverse adjusting threads 503 at both ends of the adjusting shaft 502 engage with the meshing blocks 203 inside the support cylinder 202, causing the two support frames 201 to move in opposite directions along the internal sliding groove of the support main shaft 501. This causes the contour rods 205 of the first detection mechanism 1 and the second detection mechanism 2 to be misaligned, changing the original equidistant spacing of the contour rods 205 to match the current pasture density.

[0024] During adjustment, the inner support frame 6 supports the second detection mechanism 2, reducing the deformation of the support frame 201 caused by force. The sliding groove inside the support main shaft 501 limits the sliding trajectory of the meshing block 203, ensuring the stability of the movement direction of the support frame 201 when the adjustment shaft 502 rotates, and avoiding deviations in the adjustment of the spacing of the contour rod 205. When the auxiliary motor 4 stops or rotates in the reverse direction, the unidirectional transmission characteristic of the connecting flywheel 504 keeps the inner ring stationary, the adjustment shaft 502 stops rotating, and the spacing of the contour rod 205 remains in its current state until the next density detection triggers the adjustment command, thus achieving dynamic adaptation to the forage harvesting process.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A contour-following detection mechanism for a forage harvesting platform, characterized in that: include: The second detection mechanism (2) includes a support frame (201). A plurality of connecting rods (204) are fixedly provided on one side of the support frame (201). A plurality of contour rods (205) are fixedly arranged at equal intervals on the side of the plurality of connecting rods (204) near the outside. The plurality of contour rods (205) imitate human fingers to perform simple separation of pasture. A support cylinder (202) is fixedly provided in the middle position inside the support frame (201). A meshing block (203) is fixedly provided at the top inside the support cylinder (202). Among the multiple contour rods (205), those connected to the same connecting rod (204) form a group. In one of the multiple groups of contour rods (205), an ultrasonic detector is installed inside each of the groups with a gap in the number of rods. The first detection mechanism (1) has the same and symmetrical structure as the second detection mechanism (2). The two symmetrical connecting rods (204) are slidably connected to each other, and the two close-to-each contour rods (205) are combined to form a complete cylinder. The positions of the ultrasonic detectors set in the two groups are staggered. The adjustment mechanism (5) includes a support spindle (501), an adjustment shaft (502) is rotatably provided inside the support spindle (501), and adjustment threads (503) are provided at both ends of the adjustment shaft (502), and the two adjustment threads (503) are in opposite directions. The two adjustment threads (503) are respectively engaged with two meshing blocks (203). A connecting flywheel (504) is fixedly provided at one end of the adjustment shaft (502). When the outer ring of the connecting flywheel (504) rotates clockwise, it can drive the inner ring to rotate. The auxiliary motor (4) is fixedly connected to the outer ring of the connecting flywheel (504). When the auxiliary motor (4) drives the connecting flywheel (504) to rotate clockwise, it will drive the adjusting shaft (502) to rotate. The support connecting frame (3) has two symmetrically arranged at both ends of the adjustment mechanism (5), including a drive motor (303). The drive motor (303) has an output end (305) in the middle position inside, and the output end (305) is fixedly connected to both ends of the support cylinder (202). Among them, the drive motor (303) drives the adjustment mechanism (5), the first detection mechanism (1) and the second detection mechanism (2) to rotate counterclockwise. The output end (305) of the auxiliary motor (4) remains stationary. When the output end (305) of the auxiliary motor (4) rotates clockwise, it drives the adjustment shaft (502) to rotate. The adjustment shaft (502) drives the two support frames (201) to move in opposite directions, thereby causing the two sets of contour rods (205) to be misaligned, reducing the spacing of the original equidistant contour rods (205).

2. The forage harvesting platform contour detection mechanism according to claim 1, characterized in that: Two support rods (302) are fixedly installed on one side of the drive motor (303), and a connecting block (301) is fixedly installed on the other end of each of the two support rods (302). Multiple connecting blocks (301) are connected to the harvesting table.

3. The contour-following detection mechanism for a forage harvesting platform according to claim 1, characterized in that: Multiple connecting posts (304) are fixedly provided on opposite sides of the two drive motors (303), and one side of the auxiliary motor (4) is fixed to one side of the drive motor (303) by a set of connecting posts (304).

4. The contour-following detection mechanism for a forage harvester as described in claim 1, characterized in that: Multiple inner support frames (6) are slidably arranged between the second detection mechanism (2) and the adjustment mechanism (5), and the multiple inner support frames (6) support the second detection mechanism (2) to reduce deformation.

5. The contour detection mechanism for a forage harvester as described in claim 1, characterized in that: The supporting spindle (501) is hollow inside and has a groove at the upper end. The meshing block (203) is slidably disposed inside the groove.

6. The contour-following detection mechanism for a forage harvesting platform according to claim 1, characterized in that: The two drive motors (303) are hollow at their internal center positions, and the two ends of the adjustment shaft (502) extend from their interior to the exterior.

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