CN113647254B - Bionic chopping knife, straw chopping device and combine harvester - Google Patents
Bionic chopping knife, straw chopping device and combine harvester Download PDFInfo
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- CN113647254B CN113647254B CN202110986419.9A CN202110986419A CN113647254B CN 113647254 B CN113647254 B CN 113647254B CN 202110986419 A CN202110986419 A CN 202110986419A CN 113647254 B CN113647254 B CN 113647254B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
- A01F29/00—Cutting apparatus specially adapted for cutting hay, straw or the like
- A01F29/02—Cutting apparatus specially adapted for cutting hay, straw or the like having rotating knives with their cutting edges in a plane perpendicular to their rotational axis
- A01F29/04—Cutting apparatus specially adapted for cutting hay, straw or the like having rotating knives with their cutting edges in a plane perpendicular to their rotational axis with feeding direction transverse to axis
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
- A01F29/00—Cutting apparatus specially adapted for cutting hay, straw or the like
- A01F29/09—Details
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Abstract
The invention relates to a bionic chopping knife, a straw chopping device and a combined harvester, wherein the characteristic curve of the cutting edge of the bionic chopping knife is the profile curve of left cutting teeth and/or right cutting teeth of a locust-simulated mouthpart; the left cutting tooth or the right cutting tooth comprises one or more same bionic contour curves, each bionic contour curve comprises 5 sections of fitted convex curves, the straw chopping device comprises the bionic chopping knife, the bionic chopping knife of the straw chopping device of the combined harvester comprises a bionic chopping movable knife and a bionic chopping fixed knife, the locust is referred to chew teeth of food, crop stalks such as rice, wheat, rape and the like are chopped through the supporting action of the movable knife and the fixed knife rotating at high speed, and the cutting mode of the bionic chopping knife and the cutting edge of the movable fixed knife in a staggered combination mode can effectively reduce the resistance of cutting straws, reduce the power consumption of the device and solve the problems of poor chopping quality and high power consumption of the conventional straw chopping device.
Description
Technical Field
The invention belongs to the technical field of agricultural engineering bionics, and particularly relates to a bionic shredding knife, a straw shredding device and a combine harvester.
Background
Crop straws belong to important biomass energy resources of an agricultural ecosystem, along with the development of domestic agricultural machinery in recent years, a large amount of straws generated by crops far exceed the requirements of traditional agriculture, a straw chopping device matched with crop harvesting mainly by a combine harvester has the problems of low chopping quality, high power consumption and the like, and domestic related researches are few in engineering application of optimal design of chopping knives of the straw chopping device.
Disclosure of Invention
Aiming at the technical problems, the invention provides a bionic chopping knife, a straw chopping device and a combined harvester, wherein the characteristic curve of the cutting edge of the bionic chopping knife is the profile curve of left cutting teeth and/or right cutting teeth of a locust-simulated mouthpart; the left cutting tooth or the right cutting tooth comprises one or more same bionic contour curves, and each bionic contour curve comprises 5 sections of fitted convex curves; the straw chopping device comprises the bionic chopping knife; referring to teeth of locust chewing food, the bionic chopping knife of the straw chopping device of the combined harvester comprises a bionic chopping movable knife and a bionic chopping fixed knife, crop stalks such as rice, wheat, rape and the like are chopped through the supporting action of the movable knife and the fixed knife which rotate at a high speed, and the cutting mode of the bionic chopping knife and the cutting edge of the movable and fixed knife blades in a staggered combination mode can effectively reduce the resistance of cutting straws, reduce the power consumption of the device, and solve the problems of poor chopping quality and high power consumption of the conventional straw chopping device.
Eastern Asian locusts, commonly known as locust or locust, for domestic common agricultural pest, distribute in Huang Huai Hai plain and coastal area mostly, use multiple gramineous plants such as wheat, rice, maize as the food, adult period appetite is very big, accounts for more than three fourths of a lifetime total food intake, and this biological chewing mouthpart is extremely flourishing, has good cutting performance, wherein the jawbone of mouthpart mainly is used for cutting off plant stem leaf, promptly before food gets into the mouthpart, the jawbone of right tooth and left tooth uses head mouthpart as axle center outwards to expand again to the inboard shrink of tooth closed cutting off plant fiber. The bionic shredding knife and the combined cutting mode which can be matched with a straw shredding device of a combined harvesting machine are provided by utilizing a bionic technology, combining actual working conditions and a biological habitat, taking the upper jaw cutting teeth of the locust as a bionic prototype, taking the outline curve of the cutting teeth of the locust as the basis of the structural design of a knife edge, and combining the movement mode that the cutting teeth mutually support and cut stem leaves in the same direction when the locust eats, so that the straw cutting quality and the grass chopping effect can be effectively improved, and the power consumption of machines and tools can be reduced.
The technical scheme of the invention is as follows: a bionic chopping knife has a characteristic curve of a cutting edge of the bionic chopping knife, which is a profile curve of a locust-simulated upper jaw left cutting tooth and/or right cutting tooth;
the right cutting teeth comprise one or more same bionic contour curves, each bionic contour curve comprises 5 sections of fitted convex curves, and a fitting equation with y as a vertical coordinate and x as a horizontal coordinate is expressed as follows:
the first curve satisfies: y =2.325 × 10 -3 x 4 -0.104x 3 +0.5733x 2 -0.1767x-5.129×10 -3 Wherein: x is more than or equal to 0 and less than or equal to 6;
the second curve satisfies: y =1.775 × 10 -2 x 3 -0.3623x 2 +0.9243x +0.1306, wherein: x is more than or equal to 0 and less than or equal to 3;
the third curve satisfies: y =9.218 × 10 -3 x 4 -0.1226×10 -2 x 3 +0.1878x 2 +1.399x +0.1168, wherein: x is more than or equal to 0 and less than or equal to 6;
the fourth curve satisfies: y = -0.0115x 5 +0.1985x 4 -1.143x 3 +2.34x 2 -0.8964x +0.7477, wherein: x is more than or equal to 0 and less than or equal to 5;
the fifth curve satisfies: y =2.01 × 10 -3 x 4 -3.578×10 -2 x 3 +9.198×10 -2 x 2 +0.6101x-3.072×10 -2 Wherein: x is more than or equal to 0 and less than or equal to 8;
the left cutting tooth comprises one or more same bionic contour curves, each bionic contour curve comprises 5 sections of fitted convex curves, and a fitting equation with y as a vertical coordinate and x as a horizontal coordinate is expressed as follows:
the first curve satisfies: y =0.2617x 3 -1.564x 2 +2.41x+4.764×10 -3 Wherein: x is more than or equal to 0 and less than or equal to 3;
the second curve satisfies: y =1.657 × 10 -2 x 5 -0.2283x 4 +1.177x 3 -2.83x 2 +2.944x +0.2293, wherein: x is more than or equal to 0 and less than or equal to 5;
the third curve satisfies: y =1.568 × 10 -2 x 5 -0.1955x 4 +0.8693x 3 -1.73x 2 +1.533x +0.4956, wherein: x is more than or equal to 0 and less than or equal to 5;
the fourth curve satisfies: y = -8.063 × 10 -2 x 4 +0.6782x 3 -1.903x 2 +1.911x +0.3612, wherein: x is more than or equal to 0 and less than or equal to 4;
the fifth curve satisfies: y = -7.002 × 10 -4 x 5 +1.883×10 -2 x 4 -0.168x 3 +0.5143x 2 -0.1218x +0.3272, wherein: x is more than or equal to 0 and less than or equal to 11.
The invention also provides a cutting device which comprises the bionic chopping knife.
The invention also provides an agricultural implement which comprises the cutting device.
The invention also provides a straw chopping device of the combine harvester, which comprises the bionic chopping knife, wherein the bionic chopping knife comprises a bionic chopping movable knife and a bionic chopping fixed knife; the bionic chopping moving knife is respectively connected with the moving knife hubs which are uniformly distributed on the moving knife roll shaft along the circumferential direction, the bionic chopping fixed knife is connected with the fixed knife bottom plate, and the bionic chopping moving knife passes through the space between the adjacent bionic chopping fixed knives in the rotation process.
In the above scheme, the cutting edge characteristic curve of the bionic chopping moving knife is an locust-simulated right-cutting profile curve or a locust-simulated left-cutting profile curve, and the cutting edge characteristic curve of the bionic chopping fixed knife is an locust-simulated left-cutting profile curve or a locust-simulated right-cutting profile curve.
Furthermore, when the bionic chopping fixed knife and the bionic chopping movable knife are used for setting the knife, each bionic contour curve of the outermost edge of the bionic chopping fixed knife begins to extend from the fifth curve to the first curve along the edge of the cutting edge, and each bionic contour curve of the outermost edge of the bionic chopping movable knife begins to extend from the first curve to the fifth curve along the edge of the cutting edge.
Furthermore, the bionic contour curves of the bionic chopping fixed knife and the bionic chopping movable knife are the same in horizontal length.
Furthermore, the first curve peak of the right cutting gear profile curve is located at the trough between the first curve and the second curve of the left cutting gear profile curve, the second curve peak of the right cutting gear profile curve is located at the trough between the second curve and the third curve of the left cutting gear profile curve, the third curve of the right cutting gear profile curve peak is located at the trough between the third curve and the fourth curve of the left cutting gear profile curve, and the fourth curve of the right cutting gear profile curve peak is located at the trough between the fourth curve and the fifth curve of the left cutting gear profile curve.
The invention also provides a combined harvester which comprises the straw chopping device of the combined harvester.
Compared with the prior art, the invention has the beneficial effects that: compared with the traditional straw chopping device, the straw chopping device has the advantages that the bionic chopping movable knife and the bionic chopping fixed knife are mutually opposite to each other to cut the straws in a mode of mutually engaging the left teeth and the right teeth when the grasshopper is simulated to feed, and the combination mode of the movable knife and the fixed knife can improve the chopping quality of the straws. Due to the excellent stem leaf cutting characteristic of the locust teeth, the straw can be effectively cut, and the cutting edge curves of the movable cutter and the fixed cutter corresponding to different tooth-shaped structures of the locust left teeth and the locust right teeth are designed, so that the straw cutting resistance can be effectively reduced, and the power consumption of the straw cutting device can be reduced. In addition, the special tooth-shaped structure of the locust has a self-sharpening effect, so that the service life of the bionic chopping knife can be prolonged, and the grinding effect is improved to a certain extent.
Drawings
FIG. 1 is an isometric view of the overall construction of the straw chopper of the present invention.
FIG. 2 is an isometric view of the rear side of the shredding member of the present invention.
FIG. 3 is the profile curve of the right tooth of the locust-simulated and the front view of the bionic chopping moving blade.
Fig. 4 is an enlarged view of a portion a in fig. 3.
FIG. 5 is the contour curve of the locust-simulated left tooth and the front view of the bionic chopping knife.
Fig. 6 is an enlarged view at B in fig. 5.
FIG. 7 is a schematic diagram of the combined cutting of the bionic cutting stationary blade and the bionic cutting movable blade of the present invention during the blade setting.
Fig. 8 is an enlarged view at C in fig. 7.
In the figure: 1-bionic cutting fixed knife; 2-chopping the front supporting plate; 3-fixing a cutter bottom plate; 4-bionic chopping moving blades; 5-moving the blade wheel hub; 6-moving knife roll shaft; 7-an outer side cover plate of the straw chopping device; 8-cutter shaft balance block; 9-chopping a rear baffle; 10-a handle; 11-cutting up the rear grass guide plate; 12-chopping the back supporting plate;
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example 1
A bionic chopping knife has a characteristic curve of a cutting edge of the bionic chopping knife, which is a profile curve of a locust-simulated upper jaw left cutting tooth and/or right cutting tooth;
the right cutting tooth comprises one or more same bionic contour curves, each bionic contour curve comprises 5 sections of fitted convex curves, and a fitting equation with y as a vertical coordinate and x as a horizontal coordinate is expressed as follows:
the first curve satisfies: y =2.325 × 10 -3 x 4 -0.104x 3 +0.5733x 2 -0.1767x-5.129×10 -3 Wherein: x is more than or equal to 0 and less than or equal to 6;
the second curve satisfies: y =1.775 × 10 -2 x 3 -0.3623x 2 +0.9243x +0.1306, wherein: x is more than or equal to 0 and less than or equal to 3;
the third curve satisfies: y =9.218 × 10 -3 x 4 -0.1226×10 -2 x 3 +0.1878x 2 +1.399x +0.1168, wherein: x is more than or equal to 0 and less than or equal to 6;
the fourth curve satisfies: y = -0.0115x 5 +0.1985x 4 -1.143x 3 +2.34x 2 -0.8964x +0.7477, wherein: x is more than or equal to 0 and less than or equal to 5;
the fifth curve satisfies: y =2.01 × 10 -3 x 4 -3.578×10 -2 x 3 +9.198×10 -2 x 2 +0.6101x-3.072×10 -2 Wherein: x is more than or equal to 0 and less than or equal to 8;
the left cutting tooth comprises one or more same bionic contour curves, each bionic contour curve comprises 5 sections of fitted convex curves, and a fitting equation with y as a vertical coordinate and x as a horizontal coordinate is expressed as follows:
the first curve satisfies: y =0.2617x 3 -1.564x 2 +2.41x+4.764×10 -3 Wherein: x is more than or equal to 0 and less than or equal to 3;
the second curve satisfies: y =1.657 × 10 -2 x 5 -0.2283x 4 +1.177x 3 -2.83x 2 +2.944x +0.2293, wherein: x is more than or equal to 0 and less than or equal to 5;
the third curve satisfies: y =1.568 × 10 -2 x 5 -0.1955x 4 +0.8693x 3 -1.73x 2 +1.533x +0.4956, wherein: x is more than or equal to 0 and less than or equal to 5;
the fourth curve satisfies: y = -8.063 × 10 -2 x 4 +0.6782x 3 -1.903x 2 +1.911x +0.3612, wherein: x is more than or equal to 0 and less than or equal to 4;
the fifth curve satisfies: y = -7.002 × 10 -4 x 5 +1.883×10 -2 x 4 -0.168x 3 +0.5143x 2 -0.1218x +0.3272, wherein: x is more than or equal to 0 and less than or equal to 11.
Example 2
A cutting device comprising the biomimetic mincing knife of embodiment 1, thereby
The beneficial effects of embodiment 1 are achieved, and are not described in detail herein.
Example 3
An agricultural implement comprising the cutting device of embodiment 2, thereby having the advantages of embodiment 2, and the details are not repeated herein.
Example 4
As shown in fig. 1, a straw chopping device of a combine harvester comprises a bionic chopping knife in the embodiment 1, wherein the bionic chopping knife comprises a bionic chopping movable knife and a bionic chopping fixed knife; the bionic chopping moving knife is respectively connected with the moving knife hubs which are uniformly distributed on the moving knife roll shaft along the circumferential direction, the bionic chopping fixed knife is connected with the fixed knife bottom plate, and the bionic chopping moving knife passes through the space between the adjacent bionic chopping fixed knives in the rotation.
According to the embodiment, preferably, four groups of moving blades are uniformly distributed on the moving blade roller shaft 6 along the circumferential direction, moving blade hubs 5 are spirally mounted at intervals of 90 degrees, the bionic chopping moving blades 4 are connected to the moving blade hubs 5 through bolts, and seven bionic chopping moving blades 4 are mounted on each group in the embodiment, so that twenty-eight bionic chopping moving blades are mounted in total. The bionic chopping fixed knife 1 is correspondingly arranged and matched with the bionic chopping movable knife 4 to cut straws, the bionic chopping fixed knife 1 is connected to a fixed knife bottom plate 3 through bolts and is connected with the same plane with the chopping front supporting plate 2, and the plane and the horizontal plane form a certain included angle, more specifically 20-30 degrees. One end of the moving blade roll shaft 6 is provided with a blade shaft balance block 8, so that the vibration amplitude of the moving blade chopping component under high-speed rotation is reduced. The outer side cover plate 7 of the straw chopping device is connected with two ends of the movable cutter roller shaft 6, and one end of the movable cutter roller shaft 6 is connected with a front-stage transmission device of the combine harvester through a belt pulley.
As shown in figure 2, a part of the chopped straws is discharged through a chopped supporting plate 12, and a part of the chopped straws is thrown onto a chopped straw guide plate 9 by a movable cutter rotating at a high speed and then discharged through a chopped straw baffle plate 11.
The cutting edge characteristic curve of the bionic chopping movable cutter is an locust-simulated right-cutting profile curve or a locust-simulated left-cutting profile curve, and the cutting edge characteristic curve of the bionic chopping fixed cutter is an locust-simulated left-cutting profile curve or a locust-simulated right-cutting profile curve. According to the preferred of this embodiment, the cutting edge characteristic curve of bionical comminution moving knife is imitative locust right side cutting profile curve, the cutting edge characteristic curve of bionical comminution stationary knife is imitative locust left side cutting profile curve.
According to the embodiment, the cutting edge of the bionic chopping moving blade 4 shown in fig. 3 and 4 has an locust-simulated right cutting tooth profile, and the cutting edge of the bionic chopping fixed blade 1 has a locust-simulated left cutting tooth profile as shown in fig. 5 and 6; three groups of bionic contours are designed according to the length of the cutting edge of the cutter, the angle of the cutting edge of the cutter is about 25 degrees, the cutting edge is quenched, 65 manganese steel is preferably selected as a blade material, and the wear-resistant and impact-resistant characteristics of the blade are more suitable for complex working conditions in the straw chopping device.
According to the preferred embodiment, when the bionic chopping fixed knife and the bionic chopping movable knife are used for setting the knife, each bionic contour curve of the outermost edge of the bionic chopping fixed knife starts to extend from the fifth curve to the first curve along the edge of the cutting edge, and each bionic contour curve of the outermost edge of the bionic chopping movable knife starts to extend from the first curve to the fifth curve along the edge of the cutting edge.
According to the present embodiment, preferably, the bionic contour curves of the bionic chopping fixed knife and the bionic chopping movable knife are the same in horizontal length.
According to the preferred embodiment, the first curve peak of the right-hand cutting profile curve is located at the trough between the first curve and the second curve of the left-hand cutting profile curve, the second curve peak of the right-hand cutting profile curve is located at the trough between the second curve and the third curve of the left-hand cutting profile curve, the third curve of the right-hand cutting profile curve peak is located at the trough between the third curve and the fourth curve of the left-hand cutting profile curve, and the fourth curve of the right-hand cutting profile curve peak is located at the trough between the fourth curve and the fifth curve of the left-hand cutting profile curve, so that on one hand, the contact surface between the blade and the stalk is increased, the cutting efficiency is improved, on the other hand, the direct contact between the peak of the right-hand cutting profile curve and the peak of the left-hand cutting profile curve is prevented, and the abrasion between the bionic chopping moving blade and the bionic chopping stationary blade is reduced.
The lengths of the cutting teeth of each section on the bionic chopping moving knife 4 and the bionic chopping fixed knife 1 are basically the same. The left tooth and the right tooth move oppositely at the same side when the organism eats, and the movable knife and the fixed knife are oppositely arranged at different sides when the straw is cut, so the bionic contour curve is also designed oppositely.
When the bionic chopping moving knife 4 and the bionic chopping fixed knife 1 shown in fig. 7 and 8 are used for knife setting, the lengths of the cutting edges of each section of the two knives are the same or similar, and the convex curves of the two cutting edges are cut at the intersection notch of the two convex curves of the knife setting in a staggered manner to ensure excellent resistance reducing effect and cutting quality.
When the impurities enter the straw chopping device, a cutting motion without fixed knife support is completed when a group of bionic chopping moving knives 4 rotate at a high speed to contact the impurities, and after the bionic chopping moving knives 4 and most of the impurities simultaneously pass through the bionic chopping fixed knife group fixed on the rack, the cutting motion with fixed knife support is completed. Besides the matching cutting modes of different tooth shapes of the movable and fixed cutters, the cutting mode of the movable and fixed cutters similar to the bionic right tooth or the cutting mode of the movable and fixed cutters similar to the bionic left tooth can be designed, or the cutting mode can be applied to the cutting edges of other agricultural chopping cutters.
The working principle and the process of the straw chopping device of the combine harvester are as follows:
the bionic chopping moving knife 4 is connected to the moving knife wheel hub 5 through a fastener, the moving knife wheel hubs 5 are uniformly distributed on the moving knife roll shaft 6 and are perpendicular to the axis of the knife roll, and the bionic chopping fixed knife 1 is connected to the fixed knife bottom plate 3 through a fastener. The bionic chopping moving knife 4 is circumferentially arranged along the moving knife roller shaft 6 and is oppositely arranged with the bionic chopping fixed knife 1, a certain distance is reserved between the two knife positions, the bionic chopping fixed knife 1 is vertical to the fixed knife bottom plate 3 and forms a certain inclination angle with the horizontal plane, the mutual overlapping of the moving knife and the fixed knife is ensured to cut straws, and the contact range of the blades for cutting straws is enlarged. The front support plate 2 and the bottom plate 3 of the fixed knife are connected and placed at the front end of a chopping component of the device, and the straw falling on the support plate and the base of the fixed knife is assisted to enter the cutting range of the blade. The chopping rear supporting plate 12 is arranged at the rear side of the chopping assembly and connected with the outer side cover plate 7 of the straw chopping device, and the machine frame protects the internal blades from being separated from the external environment, so that the cutting effect of the straw is improved, and the service life of the blades is prolonged. Crop stalks such as rice, wheat, rape and the like are chopped through the supporting action of the bionic chopping movable knife 4 and the bionic chopping fixed knife 1 which rotate at a high speed, and the cutting mode of the staggered combination of the cutting edges of the bionic chopping movable knife 4 and the bionic chopping fixed knife 1 can effectively reduce the resistance of cutting the stalks and reduce the power consumption of the device.
When the bionic fixed chopping knife works, the moving knife roll shaft 6 is driven by a motor to rotate at a high speed, and the bionic chopping moving knife 4 connected with the knife rest on the knife roll continuously passes through the bionic chopping fixed knife 1. When the straws enter the straw chopping device, the bionic chopping movable knife 4 rotating at a high speed strikes and crushes the straws, when the straws contact the bionic chopping fixed knife 1 again, the bionic chopping movable knife 4 and the bionic chopping fixed knife 1 simultaneously perform cutting motion mutually to cut off the straws again, and the chopped straws are thrown into the field from the chopped supporting plate.
The cutting mode that the bionic cutting fixed knife 1 and the bionic cutting movable knife 4 cut left and right cutting teeth mutually when being similar to locust feeding can increase the contact area of cutting edge and cut plant stem leaf by the cutting mode that the convex curve of the right cutting tooth part intersects with the notch of the junction of the two convex curves of the left cutting tooth, and the cutting mode similar to double shearing can reduce the cutting resistance, and the cutting efficiency can be effectively improved by the cutting modes of multiple groups.
A mechanical property tester is used for carrying out a rape stem cutting test, and compared with a blade manufactured by the locust-simulated right cutting tooth profile curve cutting edge and the locust-simulated left cutting tooth profile curve cutting edge of the invention, the blade is the same as a common flat-edge blade and a common sawtooth blade, after a plurality of groups of tests and finishes, as shown in table 1, the average cutting force of the locust-simulated right cutting tooth blade is reduced by 16.4 percent compared with that of the sawtooth blade, the average cutting force of the locust-simulated left cutting tooth blade is reduced by 16.7 percent compared with that of the sawtooth blade, the average cutting force of the locust-simulated right cutting tooth blade is reduced by 10.2 percent compared with that of the flat blade, and the average cutting force of the locust-simulated left cutting tooth blade is reduced by 10.5 percent compared with that of the sawtooth blade in the rape stem cutting test. The bionic blade is smaller than average cutting force of a common flat knife and a common serrated knife, the cutting stem can be more labor-saving on the whole, in addition, the stem can be effectively beaten by the larger instant cutting force, the chopping quality is better, and the service life of the cutter is shortened due to the fact that the blade is abraded.
TABLE 1 comparison of cutting force when the blades of different edge types cut rape stalks
Example 5
A combine harvester comprising the combine harvester straw chopper of embodiment 4. Therefore, the beneficial effects of embodiment 1 are obtained, and the description is omitted here.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.
The above-listed detailed description is only a specific description of possible embodiments of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (9)
1. A bionic chopping knife is characterized in that the bionic chopping knife comprises a bionic chopping movable knife and a bionic chopping fixed knife; the cutting mode of the bionic cutting fixed knife and the bionic cutting movable knife is a mode that left and right cutting teeth cut with each other when the locust eats;
the characteristic curve of the cutting edge of the bionic chopping knife is a contour curve of a left cutting tooth and/or a right cutting tooth of an upper jaw of an locust-simulated, and the locust is an east Asian migratory locust;
the right cutting tooth comprises one or more same bionic contour curves, each bionic contour curve comprises 5 sections of fitted convex curves, and a fitting equation with y as a vertical coordinate and x as a horizontal coordinate is expressed as follows:
the first curve satisfies: y =2.325 × 10 -3 x 4 -0.104x 3 +0.5733x 2 -0.1767x-5.129×10 -3 Wherein: x is more than or equal to 0 and less than or equal to 6;
the second curve satisfies: y =1.775 × 10 -2 x 3 -0.3623x 2 +0.9243x +0.1306, wherein: x is more than or equal to 0 and less than or equal to 3;
the third curve satisfies: y =9.218 × 10 -3 x 4 -0.1226×10 -2 x 3 +0.1878x 2 +1.399x +0.1168, wherein: x is more than or equal to 0 and less than or equal to 6;
the fourth curve satisfies: y = -0.0115x 5 +0.1985x 4 -1.143x 3 +2.34x 2 -0.8964x+0.7477, wherein: x is more than or equal to 0 and less than or equal to 5;
the fifth curve satisfies: y =2.01 × 10 -3 x 4 -3.578×10 -2 x 3 +9.198×10 -2 x 2 +0.6101x-3.072×10 -2 Wherein: x is more than or equal to 0 and less than or equal to 8;
the left cutting tooth comprises one or more same bionic contour curves, each bionic contour curve comprises 5 sections of fitted convex curves, and a fitting equation with y as a vertical coordinate and x as a horizontal coordinate is expressed as follows:
the first curve satisfies: y =0.2617x 3 -1.564x 2 +2.41x+4.764×10 -3 Wherein: x is more than or equal to 0 and less than or equal to 3;
the second curve satisfies: y =1.657 × 10 -2 x 5 -0.2283x 4 +1.177x 3 -2.83x 2 +2.944x +0.2293, wherein: x is more than or equal to 0 and less than or equal to 5;
the third curve satisfies: y =1.568 × 10 -2 x 5 -0.1955x 4 +0.8693x 3 -1.73x 2 +1.533x +0.4956, wherein: x is more than or equal to 0 and less than or equal to 5;
the fourth curve satisfies: y = -8.063 × 10 -2 x 4 +0.6782x 3 -1.903x 2 +1.911x +0.3612, wherein: x is more than or equal to 0 and less than or equal to 4;
the fifth curve satisfies: y = -7.002 × 10 -4 x 5 +1.883×10 -2 x 4 -0.168x 3 +0.5143x 2 -0.1218x +0.3272, wherein: x is more than or equal to 0 and less than or equal to 11.
2. A cutting device comprising the biomimetic chopper of claim 1.
3. An agricultural implement comprising the cutting device of claim 2.
4. A combine straw chopping device, characterized by comprising the bionic chopping knife of claim 1, wherein the bionic chopping knife comprises a bionic chopping movable knife (4) and a bionic chopping fixed knife (1);
the bionic cutting moving knife (4) is respectively connected with moving knife hubs (5) which are uniformly distributed on the moving knife roll shaft (6) along the circumferential direction, the bionic cutting fixed knife (1) is connected with the fixed knife bottom plate (3), and the bionic cutting moving knife (4) passes between the adjacent bionic cutting fixed knives (1) in the rotation process.
5. The straw chopping device of the combine harvester according to claim 4, wherein the characteristic curve of the cutting edge of the bionic chopping movable cutter (4) is a locust-simulated right-cutting gear profile curve or a locust-simulated left-cutting gear profile curve, and the characteristic curve of the cutting edge of the bionic chopping stationary cutter (1) is a locust-simulated left-cutting gear profile curve or a locust-simulated right-cutting gear profile curve.
6. The straw chopper of the combine harvester according to claim 5, wherein when the bionic chopping stationary blade (1) and the bionic chopping movable blade (4) are set, each bionic contour curve of the outermost cutting edge of the bionic chopping stationary blade (1) extends from the fifth curve to the first curve along the edge, and each bionic contour curve of the outermost cutting edge of the bionic chopping movable blade (4) extends from the first curve to the fifth curve along the edge.
7. The straw chopper of the combine harvester according to claim 5, wherein the bionic contour curves of the bionic chopping fixed knife (1) and the bionic chopping movable knife (4) are the same in horizontal length.
8. The combine straw chopper of claim 5, wherein the first curve peak of the right-hand cutting profile curve is located at a trough between the first curve and the second curve of the left-hand cutting profile curve, the second curve peak of the right-hand cutting profile curve is located at a trough of the second curve and the third curve of the left-hand cutting profile curve, the third curve peak of the right-hand cutting profile curve is located at a trough of the third curve and the fourth curve of the left-hand cutting profile curve, and the fourth curve peak of the right-hand cutting profile curve is located at a trough of the fourth curve and the fifth curve of the left-hand cutting profile curve.
9. A combine harvester comprising the combine harvester straw chopper of claim 4.
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| CN114009214B (en) * | 2021-12-15 | 2023-12-22 | 中国农业科学院茶叶研究所 | Bionic tea-picking cutter, tea-picking device and tea-picking method |
| CN114208523A (en) * | 2021-12-15 | 2022-03-22 | 中国农业科学院茶叶研究所 | Pruning cutter is picked in bionic structure tea garden |
| CN114698474B (en) * | 2022-04-12 | 2023-04-07 | 中国农业大学 | Bionic special-shaped cutter for silage forage grass |
| CN115643891A (en) * | 2022-10-11 | 2023-01-31 | 海南大学 | Vertical three-shaft distribution beveling two-stage crushing returning machine |
| CN116918572B (en) * | 2023-08-17 | 2024-05-14 | 云南农业大学 | Self-propelled under-forest pseudo-ginseng stem leaf harvester based on armyworm upper jaw bionical |
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| CN202019572U (en) * | 2011-01-14 | 2011-11-02 | 东北农业大学 | Cutting edge structure possessing bionic geometric characteristics |
| CN103069971B (en) * | 2013-01-22 | 2015-07-01 | 吉林大学 | Saw-blade saw bit with bionic sawteeth for cutting maize straws |
| CN206100942U (en) * | 2016-09-27 | 2017-04-19 | 约翰迪尔（天津）有限公司 | Pulverator and combine thereof |
| CN108337993A (en) * | 2017-12-06 | 2018-07-31 | 李兰慧 | A kind of crops packaging facilities |
| AU2020102241A4 (en) * | 2020-09-14 | 2020-10-29 | Heilongjiang Academy Of Agricultural Machinery Sciences | A special test bed for potato digging shovel |
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