CN218473806U - Crops cut off device and agricultural machinery - Google Patents

Abstract

The utility model discloses a crops cut off device and agricultural machinery, crops cut off device include sieving mechanism, cutting knife and cutting drive arrangement, it can make to wait to cut off the mesh that the object passed and wait to remain the unable object of passing to have a plurality of on the sieving mechanism, and its at least surface is planar structure in order to form the cutting surface, the cutting knife is in can be at the plane removal that is on a parallel with the cutting surface under cutting drive arrangement's the drive, in order to pass the crop of mesh cuts off. The object to be cut and the object to be reserved are cut through the belt cutting object after the object to be cut and the object to be reserved are screened through the screening device, so that the object to be reserved cannot be cut by mistake, and damage to crops due to excessive cutting of irrelevant organs in the topping or picking process can be avoided.

Description

Crops cut off device and agricultural machinery

Technical Field

The application relates to the technical field of agricultural machinery, in particular to a crop cutting device and an agricultural machine.

Background

Crops are subjected to various conditions needing to be cut in the growth period, for example, some crops need to be topped in the growth period in order to inhibit the apical dominance of the crops, some crops need to be picked at the mature period, traditional farmers usually carry out topping or fruit picking in a manual mode, but the manual topping and picking efficiency is low, the labor intensity of workers is high, and the modern farms are not suitable for large-scale use.

The prior art provides equipment for achieving topping and picking, which is generally of a horizontal flail knife type, and topping or fruit picking is performed by driving a knife to rotate or translate horizontally, however, the equipment usually performs undifferentiated excision on all organs in a certain range on crops, and many unrelated organs are excised, so that adverse effects are easily caused on the growth of the crops.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an aim at: provided are a crop cutting device and an agricultural machine, which can solve the above problems in the prior art.

In order to achieve the purpose, the following technical scheme is adopted in the application:

in one aspect, the crop cutting device comprises a screening device, a cutting knife and a cutting driving device, wherein the screening device is provided with a plurality of meshes through which objects to be cut can pass but objects to be reserved cannot pass, at least one surface of the screening device is of a planar structure to form a cutting surface, and the cutting knife can move on a plane parallel to the cutting surface under the driving of the cutting driving device so as to cut crops passing through the meshes.

Optionally, the cutting surface is a side surface of the screening device facing the crop or a side surface of the screening device facing away from the crop during operation, and the cutting knife is disposed at a side of the screening device where the cutting surface is formed.

Optionally, the screening device includes a support and a screen plate with the mesh, a mounting hole is formed on the support, and the screen plate is disposed in the mounting hole.

Optionally, the screen plate is of a rectangular structure, and the cutting knife can horizontally move in a plane parallel to the cutting surface under the driving of the cutting driving device.

Optionally, the cutting driving device is a linear motor, the linear motor has a motor fixing part and a motor moving part, the motor fixing part is fixedly mounted on the support, and the cutting knife is mounted on the motor moving part.

Optionally, the mesh plate is of a circular structure, and the cutter can rotate in a plane parallel to the cutting surface under the driving of the cutting driving device.

Optionally, the support is of a conical structure, the mounting hole is located at the bottom of the support, the cutting driving device is a motor, a main body of the motor is fixed on the support, an output shaft of the motor faces the screen plate, and the cutting knife is arranged at the end of the output shaft.

Optionally, the net plate has a plurality of lattice bars, the lattice bars are arranged in a staggered manner to form the meshes, and cutting edges are arranged on one side of each lattice bar facing to the adjacent lattice bar.

Optionally, a guiding structure is further formed on one side of the screening device facing the crop.

Optionally, the surface of one side of the lattice bar, which faces the crop, is provided with a pointed structure to form the guide structure.

Optionally, one side of the net plate facing the crop surface is of an overall convex arc-shaped or V-shaped structure to form the guide structure.

Optionally, the crop center detection device is further included, and the center detection device is arranged on the surface of the screening device, which faces away from the crops.

Optionally, the center detecting device is an infrared detecting device, a photoelectric detecting sensor, a pressure sensor, a millimeter wave radar or an image sensor.

Optionally, the screening device further comprises a turnover device for driving the screening device to turn over.

On the other hand, the agricultural machine is provided with the crop cutting device.

The beneficial effect of this application does: the application discloses crops cut off device, can be used to select the object that the crops part needs to be cut off and cut off it, it is concrete, it has the sieving mechanism that can be used for treating to cut off the object and divide the sieve, still be equipped with the cutting knife that is driven by cutting drive arrangement simultaneously, during the operation, will treat to cut off the object through the sieving mechanism and sift out the back, can directly will be sieved treats to cut off the object excision through the cutting knife, with this can accomplish the screening and cut off the operation, again can remain other objects that need remain to the at utmost, the object of avoiding too much needs to remain is amputated and is caused great loss. When the method is particularly applied to cotton topping, the top center can be screened out and cut off, and more other leaves are reserved, so that the phenomenon that the other leaves needing to be reserved are cut off to cause excessive crop damage is avoided.

In addition, this scheme is the plane with cutting knife complex cutting surface on sieving mechanism, for the surface of cambered surface or other shapes, adds man-hour at the equipment manufacturing, changes the laminating degree that improves planar cutting surface and cutting knife, based on the higher laminating degree of cutting surface and cutting knife, the smooth degree when can improving the cutting apical center of cutting knife to optimize cutting effect, improve cutting efficiency.

Drawings

The present application will be described in further detail below with reference to the accompanying drawings and examples.

FIG. 1 is a schematic view of the structure of one embodiment of the crop removing apparatus of this embodiment;

FIG. 2 is an exploded schematic view of the structure of FIG. 1;

FIG. 3 is a schematic structural view of another embodiment of the crop cutting apparatus according to the present embodiment;

FIG. 4 is an exploded schematic view of the structure of FIG. 3;

FIG. 5 is a schematic structural view of another embodiment of a mesh plate according to the present embodiment;

fig. 6 is a schematic structural view of another embodiment of the mesh plate of this embodiment.

In the figure:

1. a screen plate; 11. mesh openings; 12. cutting the surface; 2. a support; 3. a cutting drive device; 31. a motor fixing part; 32. a motor moving part; 4. and (5) cutting the knife.

Detailed Description

In order to make the technical problems solved, technical solutions adopted, and technical effects achieved by the present application clearer, the following describes technical solutions of embodiments of the present application in further detail, and it is obvious that the described embodiments are only a part of embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly and may for example be fixedly connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 to 6, the crop cutting device of the present embodiment includes a screening device, a cutting knife 4 and a cutting driving device 3, the screening device has a plurality of meshes 11 through which objects to be cut can pass but objects to be kept can not pass, at least one surface of the screening device is a planar structure to form a cutting surface 12, and the cutting knife 4 is driven by the cutting driving device 3 to move in a plane parallel to the cutting surface 12 to cut the crops passing through the meshes 11.

The object to be cut and the object to be reserved are cut through the belt cutting object after the object to be cut and the object to be reserved are screened through the screening device, so that the object to be reserved cannot be cut by mistake, and damage to crops due to excessive cutting of irrelevant organs in the topping or picking process can be avoided.

For convenience of description, the structure of the device in the present scheme is described in this embodiment by taking cotton topping as an example, the spirit of the invention aims to remove objects to be cut out by a cutting knife after screening the objects by arranging a screening device with a screening function, and the invention can be applied to topping of cotton plants and topping operation of other crops; in addition, this embodiment still can be used to fields such as reaping the fruit, and when specifically using, only need as the fruit and reap the object, set the mesh 11 size of sieving mechanism to be greater than the size of fruit and be less than the size of blade, make the fruit can pass mesh 11 smoothly and the blade can't pass mesh 11 can.

Specifically, when cotton is topped, the top center (i.e., the object to be cut) of the cotton needs to be cut, and other blades (i.e., the object to be reserved) are reserved.

As shown in fig. 1-2, the screening device is used for cutting off crops to be cut off, the principle of the screening device is equal to that of screening by a screen, and particularly, when cotton topping is carried out, the size of the top center of the cotton is far smaller than that of other blades, so that the size of the mesh 11 is set to be larger than that of the top center and smaller than that of the blades.

During operation, the screening device is sleeved on the cotton plants from top to bottom, the top centers of the tops of the cotton plants can penetrate through the meshes 11 to be screened out by the screening device, and other blades cannot penetrate through the meshes 11 to be blocked below the screening device.

The shape of the mesh 11 can be any shape such as a circle, a rectangle, a parallelogram, etc., as long as the object to be cut can pass through the mesh by screening the crop, and the object to be reserved cannot pass through the mesh.

Need utilize cutting knife 4 to cut it off after sifting out the center of a roof, it is concrete, cutting knife 4 and sieving mechanism's cutting surface 12 of this scheme is parallel and the laminating, after the mesh 11 that passes of center of a roof, its pole portion can be restricted in the region of this mesh 11, therefore, in this embodiment, when cutting drive arrangement 3 drives cutting knife 4 lateral shifting, cutting knife 4 will promote the lateral shifting by the center of a roof of sifting out, when leaning on the frame of this mesh 11 to the pole portion top of this center of a roof, this pole portion can't continue lateral shifting, cutting knife 4 and the mesh 11 cooperation of continuing lateral shifting at this moment cut off the pole portion of this center of a roof, thereby realize excising this center of a roof.

In the sieving mechanism of this embodiment, the one side that corresponds with cutting knife 4 is cutting surface 12, and cutting surface 12 is the plane, for the surface of cambered surface or other shapes, changes and guarantees cutting surface 12 and cutting knife 4's laminating degree, based on cutting surface and the higher laminating degree of cutting knife 4, does not keep the dead angle when can guaranteeing cutting knife 4 cutting apical centers, can effectively cut off whole cutting surface's all apical centers to optimize cutting effect, improve cutting efficiency.

As for the position of the cutting surface 12, optionally, the cutting surface 12 is a side surface of the screening device facing the crop or a side surface facing away from the crop during operation, and the cutting knife 4 is disposed at a side of the screening device where the cutting surface 12 is formed.

Specifically, as one of the embodiments, referring to fig. 1, the cutting surface 12 is provided on the surface of the side facing away from the crop, the cutter blade 4 is provided on the side of the cutting surface 12, and in operation, the stem portion of the center is completely cut through the cutting surface 12, and the portion below the cutting surface 12 (including the portion corresponding to the side wall of the mesh 11) remains.

As another mode (not shown), the cutting surface 12 is provided only on the surface of the side facing the crop, the cutter blade 4 is provided on the side of the cutting surface 12, and in operation, the portion of the stem portion of the center is completely cut through the cutting surface 12 (including the portion corresponding to the side wall of the mesh 11), and the portion below the cutting surface 12 remains.

As a further alternative, the cutting surfaces 12 may be provided on both sides of the screening device, wherein each cutting surface 12 is provided with a cutting blade 4, and during operation, the cutting blades 4 on the upper and lower sides may be moved simultaneously or individually to perform the cutting operation.

As for the structure of the screening device, the screening device comprises a bracket 2 and a screen plate 1 with the meshes 11, wherein the bracket 2 is provided with mounting holes, and the screen plate 1 is arranged in the mounting holes.

Preferably, the mesh plate 1 is a detachable structure, and when the mesh plate 1 is damaged or deformed, the mesh plate 1 can be detached from the bracket 2 and then repaired or replaced, thereby reducing the cost of repairing and replacing.

As one of the preferred embodiment, the mounting hole in the support 2 is a stepped hole, the screen plate 1 is directly placed in the mounting hole during installation, the mounting hole can support the screen plate 1 and can limit the periphery of the screen plate 1, and the mode has the advantage of convenience and quickness in disassembly and assembly.

In this embodiment, the screen plate 1 and the cutter 4 work together, so the structure of the screen plate 1 needs to be designed in accordance with the structure and cutting manner of the cutter 4, and for this reason, the following preferred embodiments are provided in this embodiment:

referring to fig. 1-2, the mesh plate 1 has a rectangular structure, and the cutter 4 is driven by the cutting driving device 3 to move horizontally in a plane parallel to the cutting surface 12. That is, in this mode, the cutter 4 is moved in a lateral translational movement, and the area through which it moves forms a rectangular area, so that the screen plate 1 is configured in a rectangular configuration to be adaptable to the cutting area of the cutter 4, ensuring that the center of the screen plate 1 screened can be cut by the cutter 4.

Specifically, in this manner, in order to drive the screen plate 1 to move laterally, the cutting driving device 3 is a linear motor having a motor fixing portion 31 and a motor moving portion 32, the motor fixing portion 31 is fixedly installed on the bracket 2 and located in a motor installation groove on one side of the screen plate, a knife slot is provided perpendicular to the motor installation groove, the cutting knife 4 is installed on the motor moving portion 32, and the cutting knife 4 is located in the knife installation groove in a state where the motor is not started to perform cutting.

The linear motor can output linear motion without any intermediate conversion mechanism, and when the linear motor is applied, the cutting knife 4 is directly connected with the linear motor, so that the structure of the device is simplified, and the maintenance of equipment is facilitated. Wherein, a linear motor connected with the cutting knife 4 can be arranged at one end of the cutting knife 4, and a synchronous linear motor connected with the cutting knife 4 can be arranged at both ends of the cutting knife 4.

Under the structure, after the top center passes through the screen plate 1, the linear motor drives the cutting knife 4 to move to the second end from the first end, the moving track of the cutting knife 4 covers the whole screen plate 1 to cut off the top center, and after the cutting is finished, the cutting knife 4 is driven by the linear motor to retreat to the first end so as to be convenient for the next cutting.

It should be noted that the movement of the cutting knife 4 is not limited to the above-mentioned need to be moved back to the first end after cutting once, in other embodiments, the cutting knife 4 may be set to have a blade on both sides, when it is moved from the first end to the second end, the blade towards the second end is cut, the cutting knife 4 stays at the second end after cutting, when there is a center of thrust in the screen plate 1 again through the need to cut, the linear motor drives the cutting knife to move back to the first end from the second end, and the blade towards the first end of the cutting knife is cut in the process.

According to the scheme, bidirectional cutting can be realized, and waste caused by cutter idle running in the cutter retracting process is avoided.

Meanwhile, the structure with the double-sided cutting edge can also avoid the phenomenon that the center of the top is not completely cut in the first cutting process, and the back of the knife cannot be cut in the knife withdrawing process, so that the knife is blocked.

A linear motor is a transmission device that directly converts electric energy into mechanical energy for linear motion without any intermediate conversion mechanism. The rotary motor can be seen as being formed by cutting a rotary motor in the radial direction and expanding the rotary motor into a plane. The linear motor is a novel motor which directly converts electric energy into linear motion mechanical energy without any intermediate conversion device, and has the advantages of simple system structure, less abrasion, low noise, strong combination, convenient maintenance and the like. The linear motor in the scheme can be a flat linear motor or a cylindrical linear motor.

As another embodiment, referring to fig. 3 to 4, the mesh plate 1 has a circular structure, and the cutter 4 is rotated in a plane parallel to the cutting surface 12 by the cutting driving device 3. In this way, the cutting knife 4 moves in a circumferential direction, and the area covered by the rotation is a circular area, so that the screen plate 1 is arranged in a circular structure to be suitable for the cutting area of the cutting knife 4, and the top center screened by the screen plate 1 can be cut off by the cutting knife 4. However, compared with the above-mentioned cutting method of cutting by the cutter 4 moving in a transverse translation manner, the cutting method can block the center of the top from passing through the mesh 11 at the rotating shaft of the cutter 4, so that the cutting leakage of the center of the top is easily caused, and the problem can be solved by setting the cutter 4 to move in a transverse translation manner.

Specifically, in this mode, the support 2 is a conical structure, the mounting hole is located at the bottom of the support 2, the cutting driving device 3 is a motor, a main body of the motor is fixed on the support 2, an output shaft of the motor is arranged toward the screen plate 1, and the cutting knife 4 is arranged at an end of the output shaft.

In the embodiment, the motor is also directly utilized to drive the cutting knife 4 to rotate, other transmission devices are not needed to be arranged in the middle, and the structure of the device is simplified. Meanwhile, the bracket 2 is arranged to be of a conical structure, the bottom of the bracket 2 can be used for installing the screen plate 1, and the motor is installed at the arched part in the middle of the bracket 2, so that the motor can be supported and protected.

As for the specific structure of the mesh plate 1, as a preferred embodiment, the mesh plate 1 has a plurality of grid strips, the grid strips are arranged in a staggered manner to form the meshes 11, and one side of each grid strip facing to the adjacent grid strip is provided with a cutting edge. The lattice bars are preferably flat lattice bars, the width direction of the lattice bars is vertical, the mesh plate 1 woven by the flat lattice bars is adopted, the thickness of the lattice bars is small, and the probability of missed cutting caused by blocking the top center under the mesh plate 1 can be reduced.

In the further preferred embodiment of this application can also be provided with the cutting edge respectively towards adjacent check strip in the both sides of check strip, utilizes the cutting edge to cooperate the cutting knife 4's cutting, can form the structure similar to the two-way shearing of scissors to guarantee to cut off the heart of a top smoothly, improve cutting efficiency.

Further, in this embodiment, a guiding structure is further formed on a side of the screening device facing the crop. The guiding structure arranged in the embodiment can provide guiding for the top center, so that the top center can smoothly enter the meshes 11 of the screen plate 1; or can provide a guide for other blades needing to be reserved to expand outwards so as to avoid the damage caused by the compression and bending of the net plate 1.

Specifically, referring to fig. 5, as one embodiment, the surface of the lattice bar facing the crop is provided with a pointed structure to form the guiding structure. It should be noted that fig. 5 shows a side of the net 1 as the side of the net 1 facing the crop, and the side of the net 1 facing away from the crop should be selected as the cutting surface 12. In this embodiment, the lattice bar is the closed angle towards one side of the crop, and this structure can reduce the area of the terminal surface of lattice bar towards the crop to the at utmost, and when the heart of the top of the crop contacts the lattice bar, will slide to mesh 11 under the direction of the lateral wall of lattice bar to guarantee that the heart of the top can get into mesh 11 smoothly, avoided the heart of the top to be extruded by the lattice bar and buckled and cause the hourglass and cut.

Referring to fig. 6, as another embodiment, the side of the net plate 1 facing the surface of the crop is of an overall convex arc or V-shaped structure to form the guide structure. This structure can lead the blade that needs remain, namely, when otter board 1 pushes down, the apical lamella pierces into mesh 11, when the lower surface of otter board 1 is leaned on in the blade top of apical lamella week portion, will extend to the direction of otter board 1 center dorsad along otter board 1 lower surface under the guiding action of otter board 1 lower surface, compare in otter board 1 surface towards the crop and be planar structure, the blade receives the downward effort of otter board 1 and does not produce the component of horizontal direction, thereby the blade is changeed to slide in this scheme and has avoided the extrusion of blade when otter board 1 pushes down and make the blade buckle the damage, the blade slides open simultaneously and has reduced the resistance that the blade caused to the otter board whereabouts, make the otter board push down more smoothly, guarantee the apical lamella and cut off the effect.

In order to guarantee the effectiveness of cutting, this embodiment still includes apical heart detection device, apical heart detection device sets up the surface of sieving mechanism crop dorsad. That is, whether the center is screened out can be detected by the center detection device, and when the center is detected, the cutting drive device 3 is started to drive the cutting knife 4 to move for cutting, so that the effectiveness of the cutting operation of the cutting knife 4 is ensured. Further, the length of the top heart of excision is confirmed to accessible adjustment top heart detection device's detection position and cutting surface 12's distance, promptly, only when the top heart stretches into certain length in the sieving mechanism, top heart detection device could detect the top heart, sends cutting signal to cutting drive arrangement 3 this moment and cuts the operation to enough length's top heart has been guaranteed to amputate.

Optionally, the center detecting device is an infrared detecting device, a photoelectric detecting sensor, a pressure sensor, a millimeter wave radar, an image sensor, or the like, as long as the center can be effectively identified.

Further, owing to with the heart of a top excision back, the heart of a top can persist on sieving mechanism, and the heart of a top on the sieving mechanism can obstruct other top heart of treating the excision to pass mesh 11, for solving this problem, this embodiment has still set up and has been used for the drive the turning device of sieving mechanism upset. That is, when a certain amount of the cut-off center cores are stacked on the screening device, the screening device can be driven by the turnover device to rotate and turn over to pour out the stacked center cores.

In summary, the crop cutting device provided by the embodiment can be used for operations such as topping and picking fruits on crops, and in actual operation, the screening device is pressed towards the crops, the parts (such as top cores and fruits) of the crops which need to be cut are screened by the screening device, and then the screened parts are cut by the cutting knife 4, so that the screening and cutting operations are realized. The scheme can complete the screening and cutting operation, can reserve other objects to be reserved to the maximum extent, and avoids great loss caused by cutting off excessive objects to be reserved. When the method is particularly applied to cotton topping, the top center can be screened out and cut off, and more other leaves are reserved, so that excessive loss caused by cutting off of other leaves needing to be reserved is avoided.

The embodiment also provides an agricultural machine which is provided with the crop cutting device. The agricultural machine with the crop cutting device can ensure the effectiveness and the reasonability of cutting and the cutting efficiency, and is suitable for topping and picking fruits of crops planted on a large scale.

In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are used merely for convenience of description and simplicity of operation, and do not indicate or imply that the device or element so referred to must be in a particular orientation, constructed and operated in a particular manner, and thus should not be considered limiting. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have a special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principles of the present application have been described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the present application and is not to be construed in any way as limiting the scope of the application. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present application without inventive effort, which shall fall within the scope of the present application.

Claims (15)

1. The crop cutting device is characterized by comprising a screening device, a cutting knife (4) and a cutting driving device (3), wherein the screening device is provided with a plurality of meshes (11) which can enable objects to be cut to pass through but can not enable objects to be reserved to pass through, at least one surface of the screening device is of a plane structure so as to form a cutting surface (12), and the cutting knife (4) can move on a plane parallel to the cutting surface (12) under the driving of the cutting driving device (3) so as to cut crops passing through the meshes (11).

2. The crop removal apparatus according to claim 1, wherein the cutting surface (12) is a side surface of the sifting apparatus that faces toward the crop or a side surface that faces away from the crop during operation, and the cutting knife (4) is provided on a side of the sifting apparatus where the cutting surface (12) is formed.

3. The crop cutting apparatus according to claim 1, wherein the screening device comprises a bracket (2) and a net plate (1) having the net holes (11), the bracket (2) having mounting holes formed thereon, the net plate (1) being disposed in the mounting holes.

4. Crop removal apparatus according to claim 3, wherein the screen (1) is of rectangular configuration, and the cutter (4) is horizontally movable in a plane parallel to the cutting surface (12) by the cutting drive (3).

5. The crop removal apparatus as claimed in claim 4, wherein the cutting drive (3) is a linear motor having a motor fixing portion (31) and a motor moving portion (32), the motor fixing portion (31) being fixedly mounted on the bracket (2), and the cutting blade (4) being mounted on the motor moving portion (32).

6. Crop removal apparatus according to claim 3, wherein the screen (1) is of circular configuration, and the cutter (4) is rotatable in a plane parallel to the cutting surface (12) by the cutting drive (3).

7. The crop cutting device according to claim 6, characterized in that the bracket (2) is a conical structure, the mounting hole is located at the bottom of the bracket (2), the cutting driving device (3) is a motor, the main body of the motor is fixed on the bracket (2), the output shaft of the motor is arranged towards the screen plate (1), and the cutting knife (4) is arranged at the end of the output shaft.

8. Crop removal apparatus according to claim 3, wherein the net panel (1) has a plurality of bars, the bars being arranged in a staggered manner to form the net openings (11), and the bars having cutting edges on the sides facing adjacent bars.

9. The crop removal apparatus of claim 8, wherein the side of the screen facing the crop is further formed with a guide structure.

10. The crop removal apparatus of claim 9, wherein a surface of the lattice bars on a side facing the crop is pointed to form the guide structure.

11. Crop removal apparatus according to claim 9, wherein the side of the net panel (1) facing the crop surface is of generally convex arcuate or V-shaped configuration to form the guide structure.

12. The crop removal apparatus as claimed in claim 1, further comprising a center-of-gravity detection device disposed on a surface of the screening device facing away from the crop.

13. The crop removal apparatus of claim 12, wherein the apex detection device is an infrared detection device, a photoelectric detection sensor, a pressure sensor, a millimeter wave radar, or an image sensor.

14. The crop removal apparatus of claim 1, further comprising a flipping mechanism for driving the sifting mechanism to flip.

15. An agricultural machine having a crop removal apparatus as claimed in any one of claims 1 to 14.

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