A leafy vegetable harvester and a row-by-row profiled harvesting header thereof

Abstract

A leaf vegetable harvester and a row-by-row profiled harvesting header thereof, the leaf vegetable harvester comprising a chassis and a plurality of row-by-row profiled harvesting headers installed in parallel at the front end of the chassis, the row-by-row profiled harvesting header comprising: a cross frame; a driving mechanism installed on the cross frame; a split crankshaft connected with the driving mechanism, comprising crankshaft subsegments and crankshaft half segments connected with each other, the crankshaft half segments being arranged at both ends of the crankshaft subsegments and connected with the cross frame respectively; a plurality of profiled harvesting units, each comprising a profiled arm, a ground wheel and a cutting knife, the profiled arms being symmetrically arranged, the upper ends of the profiled arms being connected with the corresponding crankshaft subsegments, the ground wheels being installed at the lower ends of the profiled arms, and the cutting knives being located between the ground wheels; each profiled harvesting unit independently working and being uniformly driven by the split crankshaft; and a connecting rod, one end of which is connected with the crankshaft subsegment and the other end of which is connected with the cutting knife; the connecting rod making spatial swing under the driving of the split crankshaft and driving the cutting knife to make linear reciprocating motion to complete the cutting of the root of the leaf vegetable.

Description

Technical Field

[0001] This invention relates to leafy vegetable harvesting technology, and in particular to a leafy vegetable harvester and its row-following contour harvesting platform. Background Technology

[0002] Whether leafy vegetables are grown in greenhouses or open fields, inconsistencies in ridge height along the ridge width are a common problem during harvest due to poor soil preparation and uneven watering leading to soil subsidence. Current leafy vegetable harvesters use a single, reciprocating blade that cuts the vegetables at a uniform height along the ridge width. This results in inconsistent cutting on uneven ridge surfaces, and even causes leaf petioles to scatter during cutting on the soil. While some models have added left-right contouring mechanisms, these only partially address the overall ridge tilt and do not solve the problem of unevenness along the ridge width. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a leafy vegetable harvester and its row-following harvesting platform, which addresses the above-mentioned deficiencies of the prior art.

[0004] To achieve the above objectives, the present invention provides a row-following contour harvesting platform for a leafy vegetable harvester, comprising:

[0005] horizontal frame;

[0006] The drive mechanism is mounted on the crossbeam;

[0007] A split crankshaft, connected to the drive mechanism, includes a crankshaft sub-segment and a crankshaft half-section connected to each other. The crankshaft half-section is located at both ends of the crankshaft sub-segment and is respectively connected to the crossbeam.

[0008] Multiple contour-following harvesting units are used to contour the vegetable cutting rows to the ridge height in real time and cut the roots evenly into the soil. Each contour-following harvesting unit includes a contour-following arm, a ground wheel, and a cutting blade. The contour-following arms are symmetrically arranged, with their upper ends connected to corresponding crankshaft segments. The ground wheels are installed at the lower ends of the contour-following arms, and the cutting blades are located between the ground wheels. Each contour-following harvesting unit operates independently but is uniformly driven by the split-type crankshaft.

[0009] A connecting rod is provided for each of the contour-following harvesting units. One end of the connecting rod is connected to the crankshaft segment, and the other end of the connecting rod is connected to the corresponding cutting blade. The connecting rod swings in space under the drive of the split crankshaft and drives the cutting blade to reciprocate linearly to complete the cutting of the leafy vegetable roots.

[0010] The above-mentioned leafy vegetable harvester's row-following contour harvesting platform also includes a guide plate, which is installed at the front of each contour harvesting unit. The guide plate includes a symmetrically arranged left side plate and a right side plate, and the left side plate and the right side plate are spatial curved surface structure plates.

[0011] The above-mentioned leafy vegetable harvester's row-following contour harvesting platform includes a crossbeam comprising a main crossbeam and a gearbox mounting plate, two side bearing mounting plates, seated bearings, a middle bearing mounting plate, and multiple contour spring support arms mounted on the main crossbeam. The contour spring support arms are connected to spring adjusting screws. The gearbox mounting plate is centrally located, and the spacing of the contour spring support arms corresponds to the row spacing of the leafy vegetables to be harvested.

[0012] In the above-mentioned leafy vegetable harvester's row-following harvesting platform, the crankshaft sub-section includes an eccentric crankshaft, a first crankshaft end cap, and a central shaft. The two ends of the central shaft are respectively connected to the first crankshaft end cap. One end of the eccentric crankshaft is connected to the first crankshaft end cap, and the other end of the eccentric crankshaft is connected to the first crankshaft end cap of the adjacent crankshaft sub-section. The eccentric crankshafts at both ends of the same crankshaft sub-section are installed in a staggered manner.

[0013] In the above-mentioned leafy vegetable harvester's row-following harvesting platform, the crankshaft half section includes a central half shaft and a second crankshaft end cover. The second crankshaft end cover is connected to the eccentric crankshaft of the adjacent crankshaft sub-section, and the central half shaft is connected to the outer side bearing of the cross frame.

[0014] In the above-mentioned leafy vegetable harvester's row-following harvesting platform, the connecting holes of the first crankshaft end cap and the second crankshaft end cap, both ends of the central shaft, and the central half shaft are all provided with connecting threads. The threads of the central shaft and the connecting holes on both sides of the cross frame's symmetrical center are distinguished as left-handed and right-handed.

[0015] The above-mentioned leafy vegetable harvester's row-following contour harvesting platform includes, in which each contour harvesting unit further comprises a retainer, a rotating sleeve, a tension spring rod, and a linear motion mechanism. The ground wheel is hinged to the retainer via a pin, the lower end of the contouring arm is hinged to the retainer, the linear motion mechanism is installed in a slot in the retainer, and both sides of the cutting blade are connected to the linear motion mechanism. The middle part of the contouring arm is connected to the rotating sleeve, and the tension spring rod is installed at the upper end of the contouring arm. The rotating sleeve is installed on the central shaft, and the contour harvesting unit rotates around the central shaft under the action of ridge surface undulation.

[0016] In the above-mentioned leafy vegetable harvester's row-following harvesting platform, the linear motion mechanism is a linear slide rail or a rolling bearing and chute structure.

[0017] The above-mentioned leafy vegetable harvester's row-following harvesting platform includes a connecting rod comprising an upper section, a middle transition section, and a lower adjustment section connected in sequence. The middle transition section has an angle with the upper section and the lower adjustment section, respectively. The upper end of the upper section is hinged to the eccentric crankshaft via a bearing, and the lower end of the lower adjustment section is hinged to the side tail fin of the cutting blade via a boss bolt.

[0018] To better achieve the above objectives, the present invention also provides a leafy vegetable harvester, which includes a chassis and a plurality of row-following harvesting cutters installed in parallel at the front end of the chassis, wherein the row-following harvesting cutters are the aforementioned row-following harvesting cutters.

[0019] The technical effects of this invention are as follows:

[0020] The row-following harvesting platform of this invention, under the action of the guide plate, can effectively separate leafy vegetables into rows. As the harvester moves forward, it can comb and gather the leafy vegetables from bottom to top, especially effective for leafy vegetables with early root tillering and abundant upper leaves. This avoids damage to the leaves during harvesting and greatly improves the quality of the leafy vegetables. It enables row-following harvesting of leafy vegetables, with each harvesting unit harvesting one row of leafy vegetables. The cutting depth of each row does not affect the others, solving the problem of inconsistent height of the ridge surface along the ridge width. Different numbers of rows of row-following harvesting platforms can be customized according to different needs. Furthermore, this row-following harvesting method results in good orderliness of the harvested leafy vegetables, providing better conditions for orderly aggregation. The cutting position of the harvesting unit can be real-time contoured along the height of the ridge surface of that row, and the contouring pre-tightening force is adjustable to adapt to different soil conditions. The underground cutting depth remains stable, avoiding different root cutting positions caused by ridge surface undulations, and meeting the requirement of harvesting leafy vegetables at the root.

[0021] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a leafy vegetable harvester according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of a row-following contour harvesting platform structure according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of a crossbeam structure according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of a split crankshaft structure according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of a crankshaft sub-segment structure according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of a crankshaft half structure according to an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of a connecting rod structure according to an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the contour-following harvester unit structure according to an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of a guide vane structure according to an embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of a cutting blade structure according to an embodiment of the present invention.

[0032] Among them, the attached reference numerals

[0033] 1 Chassis

[0034] 2 handrails

[0035] 3 drives

[0036] 4. Orderly conveying mechanism

[0037] 5-row contour harvesting platform

[0038] 51 horizontal frame

[0039] 511 Main Beam

[0040] 512 Gearbox Mounting Plate

[0041] 513 bearing mounting plate

[0042] 514 mounted bearing

[0043] 515 intermediate bearing mounting plate

[0044] 516 Contouring Tension Spring Support Arm

[0045] 517 Spring Adjusting Screw

[0046] 52 contour-following harvester units

[0047] 521 Ground Wheel

[0048] 522 contoured outrigger

[0049] 523 cutting knife

[0050] 524 cage

[0051] 525 Rotary Sleeve

[0052] 526 tension spring rod

[0053] 527 Linear Motion Mechanism

[0054] 528 pin

[0055] 53 deflector

[0056] 531 left side panel

[0057] 532 right side plate

[0058] 533 Installation support studs

[0059] 54-piece split crankshaft

[0060] 541 crankshaft sub-section

[0061] 5411 First Crankshaft End Cover

[0062] 5412 Eccentric Crankshaft

[0063] 5413 central axis

[0064] 542 crankshaft half section

[0065] 5421 Second Crankshaft End Cover

[0066] 5422 center half shaft

[0067] 55-link

[0068] 551 bearing

[0069] 552 upper section

[0070] 553 Intermediate Transition Section

[0071] 554 Lower Adjustment Section

[0072] 6 batteries Detailed Implementation

[0073] The structural and working principles of the present invention will be described in detail below with reference to the accompanying drawings:

[0074] See Figure 1 , Figure 1 This is a schematic diagram of a leafy vegetable harvester according to an embodiment of the present invention. The leafy vegetable harvester of the present invention includes a chassis 1 and multiple row-shaped contour harvesting cutters 5 installed in parallel at the front end of the chassis 1. A handle 2, a battery 6, and a driver 3 are provided at the rear end of the chassis 1. An orderly conveying mechanism 4 is also provided corresponding to each row-shaped contour harvesting cutter 5. Since the composition, structure, relative positions, connections, and functions of other parts of the leafy vegetable harvester are all mature existing technologies, they will not be described in detail here. Only the row-shaped contour harvesting cutters 5 of the present invention will be described in detail below.

[0075] See Figure 2 , Figure 2This is a schematic diagram of the row-following harvesting platform 5 according to an embodiment of the present invention. The row-following harvesting platform 5 of the present invention can be used for both fixed-row planting without ridges and standardized leafy vegetable planting patterns with a ridge width of 1100mm. Each follow-the-line harvesting unit 52 harvests one row of leafy vegetables and can follow the ridge height in real time to cut the vegetable roots evenly into the soil. Each follow-the-line harvesting unit 52 operates independently, driven uniformly by a split-type crankshaft 54, resulting in a simple and compact transmission structure. The profile-following harvesting table 5 includes: a crossbeam 51; a drive mechanism mounted on the crossbeam 51, including a gearbox and a DC motor, the gearbox being driven by the DC motor with adjustable speed to achieve different cutting frequencies at different operating speeds; a split crankshaft 54 ​​connected to the drive mechanism, including interconnected crankshaft segments 541 and crankshaft halves 542, the crankshaft halves 542 being located at both ends of the crankshaft segments 541 and respectively connected to the crossbeam 51; multiple profile-following harvesting units 52, used to follow the contour of the ridge height of the leafy vegetable harvesting row in real time and cut the vegetable roots evenly into the soil; each profile-following harvesting unit 52 includes a profile-following support arm 522, a ground wheel 521, and a cutting blade 523. The support arms 522 are symmetrically arranged, with the upper end of each contouring support arm 522 connected to the corresponding crankshaft segment 541. The ground wheel 521 is installed at the lower end of each contouring support arm 522, and the cutting blade 523 is located between the ground wheels 521. Each contouring harvesting unit 52 operates independently and is uniformly driven by the split crankshaft 54. A connecting rod 55 is also provided for each contouring harvesting unit 52. One end of the connecting rod 55 is connected to the crankshaft segment 541, and the other end of the connecting rod 55 is connected to the corresponding cutting blade 523. The connecting rod 55 swings in space under the drive of the split crankshaft 54 ​​and drives the cutting blade 523 to reciprocate linearly to complete the cutting of the leafy vegetable roots.

[0076] See Figure 3 , Figure 3 This is a schematic diagram of the crossbeam 51 according to an embodiment of the present invention. The crossbeam 51 includes a main crossbeam 511 and a gearbox mounting plate 512, two side bearing mounting plates 513, seated bearings 514, a middle bearing mounting plate 515, and multiple contoured tension spring supports 516 mounted on the main crossbeam 511. Each contoured tension spring support is connected to a spring adjusting screw 517. The crossbeam 51 can be welded together from the main crossbeam 511, the gearbox mounting plate 512, the two side bearing mounting plates 513, the seated bearings 514, the middle bearing mounting plate 515, and eight contoured tension spring supports 516. The gearbox mounting plate 512 is centrally located, and the spacing of the contoured tension spring supports 516 corresponds to the planting row spacing of the leafy vegetables to be harvested.

[0077] See Figures 4-6 , Figure 4 This is a schematic diagram of a split crankshaft 54 ​​according to an embodiment of the present invention. Figure 5 This is a schematic diagram of the crankshaft segment 541 according to an embodiment of the present invention. Figure 6 This is a schematic diagram of a crankshaft half-section 542 according to an embodiment of the present invention. The crankshaft half-section 541 of this embodiment includes an eccentric crankshaft 5412, a first crankshaft end cap 5411, and a central shaft 5413. Both ends of the central shaft 5413 are connected to the first crankshaft end cap 5411. One end of the eccentric crankshaft 5412 is connected to the first crankshaft end cap 5411, and the other end of the eccentric crankshaft 5412 is connected to the first crankshaft end cap 5411 of the adjacent crankshaft half-section 541. The eccentric crankshafts 5412 at both ends of the same crankshaft half-section 541 are installed in a staggered manner. The crankshaft half-section 542 includes a central half-shaft 5422 and a second crankshaft end cap 5421. The second crankshaft end cap 5421 is connected to the eccentric crankshaft 5412 of the adjacent crankshaft half-section 541. The central half-shaft 5422 is connected to the outer side bearing 514 of the crossbeam 51. The connecting holes of the first crankshaft end cover 5411, the connecting holes of the second crankshaft end cover 5421, both ends of the central shaft 5413 and the central half shaft 5422 are all provided with connecting threads. The threads of the central shaft 5413 and the connecting holes on both sides of the center of symmetry of the cross frame 51 are distinguished as left-handed and right-handed.

[0078] In this embodiment, the split crankshaft 54 ​​is fixed and powered by a centrally located reduction gearbox. Power to the crankshaft is provided by the central shaft 5413 of the intermediate crankshaft segment 541, which passes through the central reduction gearbox. The central shaft 5413 is connected to the reduction gearbox via a keyway. The split crankshaft 54 ​​can be assembled from seven crankshaft segments 541 and two end crankshaft halves 542. The segments are connected by eccentric crankshafts 5412 via threads. The two crankshaft halves 542 are mounted at both ends of the crankshaft, supporting the outermost contoured harvesting units. One end is connected to the adjacent crankshaft segment 541 via the eccentric crankshaft 5412, and the other end is connected to the outermost bearing 514 on the crossbeam 51 via its central half-shaft 5422. This connection is detachable for installing each contoured harvesting unit 52. To compensate for the imbalance caused by crankshaft rotation, the eccentric crankshafts 5412 at both ends of the same crankshaft segment 541 are installed in a staggered manner. The crankshaft sub-section 541 consists of two first crankshaft end caps 5411 and a central shaft 5413. The connecting holes of the first crankshaft end caps 5411 and both ends of the central shaft 5413 are threaded, and the two ends of the central shaft 5413 are threaded to the end caps. The crankshaft half-section 542 consists of a second crankshaft end cap 5421 and a central half-shaft 5422, which are threaded together. To prevent loosening of the connections between the crankshaft sub-sections 541, the threads of the central shaft 5413 and the connecting holes of the first crankshaft end caps 5411 and the second crankshaft end caps 5421 on both sides of the gearbox are respectively left-handed and right-handed.

[0079] See Figure 7 , Figure 7 This is a schematic diagram of the connecting rod 55 according to an embodiment of the present invention. To avoid obstructing the rearward transport of the cut leafy vegetables, the middle section of the connecting rod 55 protrudes to one side. That is, the connecting rod 55 includes an upper section 552, an intermediate transition section 553, and a lower adjustment section 554 connected in sequence. The intermediate transition section 553 has an angle with the upper section 552 and the lower adjustment section 554, which is preferably 90 degrees. That is, the intermediate transition section 553 is perpendicular to the upper section 552 and the lower adjustment section 554, respectively, and the upper section 552 and the lower adjustment section 554 are parallel to each other. The upper end of the upper section 552 is hinged to the eccentric crankshaft 5412 through a bearing 551, and the lower end of the lower adjustment section 554 is hinged to the side tail fin of the cutting blade 523 through a boss bolt.

[0080] See Figure 8 , Figure 8 This is a schematic diagram of the structure of a contour-following harvesting unit 52 according to an embodiment of the present invention. In this embodiment, each contour-following harvesting unit 52 further includes a retainer 524, a rotating sleeve 525, a tension spring rod 526, and a linear motion mechanism 527. The ground wheel 521 is hinged to the retainer 524 via a pin 528. The lower end of the contour-following support arm 522 is hinged to the retainer 524. The linear motion mechanism 527 is installed in a slot in the retainer 524. Both sides of the cutting blade 523 are connected to the linear motion mechanism 527. The middle part of the contour-following support arm 522 is connected to the rotating sleeve 525. The tension spring rod 526 is installed at the upper end of the contour-following support arm 522. The rotating sleeve 525 is installed on the central shaft 5413. The contour-following harvesting unit 52 rotates around the central shaft 5413 under the action of ridge surface undulation. The linear motion mechanism 527 can be a linear guide rail or a rolling bearing and groove structure, etc.

[0081] The contour-following harvester 52, through a rear tension spring and its own weight, keeps the cutting section pressed tightly against the ridge surface and conforms to the ridge height variations. The contour-following harvester 52 is hinged to the central shaft 5413 via a contour-following support arm 522, meaning that during contouring, the entire contour-following harvester 52 can rotate around the central shaft 5413. During rotation, the blade experiences a certain forward and backward displacement, which counteracts changes in distance from the crankshaft central shaft 5413. The upper end of the contour-following support arm 522 is suspended from the crossbeam 51 via a tension spring rod 526. The tension spring preload can be adjusted via a flat-head screw mechanism fixed to the crossbeam 51 to ensure that the contour-following harvester 52 can strictly conform to the ridge height even with significant variations, guaranteeing the blade's penetration into the soil.

[0082] See Figure 9 , Figure 9This is a schematic diagram of the flow guide plate 53 according to an embodiment of the present invention. In this embodiment, the row-following harvesting platform 5 also includes flow guide plates 53, which are respectively installed at the front of each of the following harvesting units 52 via a connecting plate. Each flow guide plate 53 includes a symmetrically arranged left side plate 531 and a right side plate 532. The left side plate 531 and the right side plate 532 are completely symmetrical in structure and are spatial curved surface structure plates. The rear side of the left side plate 531 and the right side plate 532 is provided with mounting support studs 533, which can be made by 3D printing or by mold stamping and welding. One end of the connecting plate is fixedly connected to the mounting support stud 533, and the other end is fixedly connected to the retainer 524 of the following harvesting unit 52. This is used to guide and gather the leafy vegetables in the row, making it convenient to feed into each following harvesting unit 52 and preventing the unit from crushing, missing, or breaking the leaves. The guide plate 53 can be set according to the growth characteristics of leafy vegetables. It guides and gathers the leafy vegetables in the vertical direction and along the horizontal direction of the ridge width. The front opening is large and close to the ridge surface, while the rear horizontal opening gradually tightens. The two sides tighten rapidly in the vertical direction, which can comb and gather the scattered leaves and petioles in the same direction and guide them to the middle cutting edge of the cutting blade 523, which facilitates the subsequent conveying after cutting.

[0083] See Figure 10 , Figure 10 This is a schematic diagram of the cutting blade 523 according to an embodiment of the present invention. The cutting blade 523 in this embodiment is a reciprocating blade structure. Each cutting blade 523 is driven by a corresponding connecting rod 55, which is fixedly connected to the tail fin on one side of the blade of the cutting blade 523. The two sides of the blade of the cutting blade 523 are fixedly connected to linear motion mechanisms 527 on both sides. Adjusting the connection position between the blade of the cutting blade 523 and the linear motion mechanism 527 can adjust the cutting depth of the blade into the soil. For small variations in cutting depth, this can be achieved by adjusting the blade mounting hole; for variations in cutting depth exceeding the adjustment range of the blade mounting hole, this can be achieved by replacing the blade with one from the same series.

[0084] During operation, the contour harvester 52, under its own weight and the action of the tension spring, presses the ground wheel 521 against the ridge and moves forward. The connecting rod 55, driven by the eccentric crankshaft 5412, swings in space. Driven by the connecting rod 55, the bottom cutting edge of the cutting blade 523 enters the soil to cut. The depth of entry into the soil is adjustable. The cutting trajectory is a back-and-forth linear motion, which completes the cutting of the roots of leafy vegetables.

[0085] This invention solves the problems existing in the underground cutting and root-bearing harvesting of vegetables in the prior art. The row-following harvesting platform 5, under the action of the guide plate 53, can effectively separate leafy vegetables into rows. That is, as the leafy vegetable harvester moves forward, it can comb and gather the leafy vegetables from bottom to top, especially for leafy vegetables with early root tillering and abundant upper leaves. This effect is more prominent, avoiding damage to the leaves during harvesting and greatly improving the quality of the leafy vegetables. The row-following harvesting platform 5 can achieve row-by-row harvesting of leafy vegetables, with each row of leafy vegetables harvested by the single-row harvesting unit 52. The cutting depth of each row does not affect the others, and can be adjusted according to... Harvesters with different numbers of rows can be customized to meet different needs. Furthermore, this row-harvesting method results in better orderliness of leafy vegetables after harvesting, providing favorable conditions for their orderly collection. The cutting depth of the cutting blade 523 and its height difference with the ground wheel 521 are adjustable, allowing the cutting position of the contour harvesting unit 52 to achieve real-time contouring along the height of the ridge surface. The contour preload is also adjustable to adapt to different soil conditions. The underground cutting depth remains stable, avoiding different root-cutting positions caused by ridge surface undulations and preventing inconsistent ridge surface height along the ridge width from affecting harvesting quality, thus meeting the requirement of harvesting leafy vegetables at the root.

[0086] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A row-following contour harvesting platform for a leafy vegetable harvester, characterized in that, include: horizontal frame; The drive mechanism is mounted on the crossbeam; A split crankshaft, connected to the drive mechanism, includes a crankshaft sub-segment and a crankshaft half-section connected to each other. The crankshaft half-section is located at both ends of the crankshaft sub-segment and is respectively connected to the crossbeam. Multiple contour-following harvesting units are used to contour the vegetable cutting rows according to the height of the ridge surface in real time and cut the vegetable roots deep into the soil. Each contour-following harvesting unit includes a contour-following support arm, a ground wheel, and a cutting blade. The contour-following support arms are symmetrically arranged, with the upper end of the contour-following support arm connected to the corresponding crankshaft segment. The ground wheel is installed at the lower end of the contour-following support arm, and the cutting blade is located between the ground wheels. Each contour-following harvesting unit operates independently and is driven by the split crankshaft. as well as A connecting rod is provided for each of the contour-following harvesting units. One end of the connecting rod is connected to the crankshaft segment, and the other end of the connecting rod is connected to the corresponding cutting blade. The connecting rod swings in space under the drive of the split crankshaft and drives the cutting blade to reciprocate linearly back and forth to complete the cutting of the root of the leafy vegetable. The crankshaft sub-segment includes an eccentric crankshaft, a first crankshaft end cap, and a central shaft. Both ends of the central shaft are connected to the first crankshaft end cap, one end of the eccentric crankshaft is connected to the first crankshaft end cap, and the other end of the eccentric crankshaft is connected to the first crankshaft end cap of the adjacent crankshaft sub-segment. The eccentric crankshafts at both ends of the same crankshaft sub-segment are installed in a staggered manner. Each of the contour-following harvester units further includes a retainer, a rotating sleeve, a tension spring rod, and a linear motion mechanism. The ground wheel is hinged to the retainer via a pin, and the lower end of the contour-following arm is hinged to the retainer. The linear motion mechanism is installed in a slot in the retainer, and both sides of the cutting blade are connected to the linear motion mechanism. The middle part of the contour-following arm is connected to the rotating sleeve, and the tension spring rod is installed at the upper end of the contour-following arm. The upper end of the contour-following arm is suspended from the crossbeam via the tension spring rod. The rotating sleeve is installed on the central axis, and the contour-following harvester unit rotates around the central axis under the action of ridge surface undulation.

2. The row-following contour harvesting platform of the leafy vegetable harvester as described in claim 1, characterized in that, It also includes a guide plate, which is installed at the front of each of the contour-following harvester units. The guide plate includes a left side plate and a right side plate that are symmetrically arranged. The left side plate and the right side plate are spatial curved surface structure plates.

3. The row-following contour harvesting platform of the leafy vegetable harvester as described in claim 1, characterized in that, The crossbeam includes a main crossbeam and a gearbox mounting plate, two side bearing mounting plates, seated bearings, a middle bearing mounting plate, and multiple contoured tension spring supports mounted on the main crossbeam. The contoured tension spring supports are connected to spring adjusting screws. The gearbox mounting plate is centrally located, and the spacing of the contoured tension spring supports corresponds to the planting row spacing of the leafy vegetables to be harvested.

4. The row-following contour harvesting platform of the leafy vegetable harvester as described in claim 1, characterized in that, The crankshaft half section includes a central half shaft and a second crankshaft end cap. The second crankshaft end cap is connected to the eccentric crankshaft of the adjacent crankshaft sub-section. The central half shaft is connected to the outer side bearing of the cross frame.

5. The row-following contour harvesting platform of the leafy vegetable harvester as described in claim 4, characterized in that, The connecting holes of the first crankshaft end cap and the second crankshaft end cap, both ends of the central shaft and the central half shaft are all provided with connecting threads. The threads of the central shaft and the connecting holes on both sides of the center of symmetry of the cross frame are distinguished as left-handed and right-handed.

6. The row-following contour harvesting platform of the leafy vegetable harvester as described in claim 1, characterized in that, The linear motion mechanism is a linear guide rail or a rolling bearing and groove structure.

7. The row-following contour harvesting platform of the leafy vegetable harvester as described in claim 1, characterized in that, The connecting rod includes an upper section, an intermediate transition section, and a lower adjustment section connected in sequence. The intermediate transition section has an angle with the upper section and the lower adjustment section, respectively. The upper end of the upper section is hinged to the eccentric crankshaft via a bearing, and the lower end of the lower adjustment section is hinged to the side tail fin of the cutting blade via a boss bolt.

8. A leafy vegetable harvester, characterized in that, It includes a chassis and multiple row-following harvesting stations mounted in parallel at the front end of the chassis, wherein the row-following harvesting station is the row-following harvesting station as described in any one of claims 1-7.

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