Bionic rotary blade based on lateral profile curve of mouthpart of tiger beetles

Abstract

The invention discloses a bionic rotary blade based on lateral profile curves of mouthparts of tiger beetles, and belongs to the technical field of agricultural machinery. The tiger beetle mouth part bionic knife is composed of a knife handle and a knife body, the knife body comprises a bionic knife edge, and the bionic knife edge is manufactured in the mode that lateral profile curves of front three teeth of a tiger beetle mouth part are amplified and stretched in an equal proportion to obtain bionic tooth-shaped structures, and then the bionic tooth-shaped structures are arrayed in the outer profile curve direction of the bionic knife edge. The bionic rotary blade manufactured on the basis of the method has the good cutting and crushing characteristics of a tiger beetle mouthpart, the total torque of the rotary blade and the torque in the knife roll direction can be remarkably reduced, and then power consumption in the rotary tillage operation process is reduced; test results show that under different tilling depths (8-12 cm) and rotation speeds (250-350 r / min), compared with a traditional rotary blade, the total torque of the rotary blade can be reduced by 9.81%, the torque in the direction of the blade roller can be reduced by 8.50%, the power consumption is reduced by 8.35%, the efficiency of rotary tillage operation is remarkably improved, the energy consumption is reduced, and the rotary blade is suitable for rotary tillage operation of various types of soil.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural tillage machinery and equipment, in particular to a bionic rotary tiller based on the lateral contour curve of a tiger beetle's mouthparts. Background Art

[0002] Rotary tillage is a crucial agricultural activity. The performance of the tiller blade, a key component of the tiller, directly impacts the quality and efficiency of the operation. Traditional tillers interact with the soil, generating significant resistance and torque. This increases energy consumption and blade wear, while also placing a heavy load on power equipment like tractors, reducing their service life.

[0003] Although there are some improved rotary tillers on the market that attempt to reduce resistance and power consumption by changing blade shape or increasing the number of teeth, the results are still unsatisfactory. Therefore, developing a new rotary tiller that can effectively reduce soil cutting resistance, torque, and power consumption is of great significance for reducing operating costs and improving agricultural production efficiency. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a bionic rotary tiller based on the lateral contour curve of the tiger beetle mouthparts. The bionic rotary tiller produced based on the present invention can significantly reduce the total torque of the rotary tiller and the torque in the direction of the blade roller, thereby reducing the power consumption during the rotary tillage operation.

[0005] The technical solution adopted by the present invention is: a bionic rotary tiller based on the lateral contour curve of the tiger beetle's mouthparts, consisting of a handle and a blade, characterized in that: the blade includes a bionic blade, which is a bionic tooth-shaped structure obtained by proportionally amplifying and stretching the lateral contour curve of the front three teeth of the tiger beetle's mouthparts, and then arraying the obtained bionic tooth-shaped structure along the direction of the outer contour curve of the bionic blade.

[0006] As a preferred solution, the bionic tooth-shaped structures are three tooth-shaped structures obtained by proportionally enlarging and stretching six bionic curves.

[0007] As a preferred solution, the equations of the six bionic curves are: I-1 is y=-0.1962x 3 +2.883x 2 -14.468x+40.746, the value range of x is 3.527 mm ≤ x ≤ 6.2159 mm; I-2 is y=-0.0047x 6 +0.1817x 5 -2.6515x 4 +19.27x 3-74.873x 2 +148.7x-103.76, the value range of x is 2.6987 mm≤x≤6.2117 mm, and the first tooth in the bionic tooth structure is formed by curve I-1 and curve I-2; II-1 is y=-0.0691x 3 +0.8201x 2 -3.9027x+19.128, the value range of x is 2.5244 mm≤x≤4.7788 mm; Ⅱ-2 is y=-0.0464x 6 +1.0055x 5 -8.8129x 4 +40.026x 3 -99.322x 2 +127.46x-54.547, the value range of x is 1.6642 mm≤x≤4.779 mm, and the curve II-1 and curve II-2 constitute the second tooth in the bionic tooth structure; III-1 is y=-0.0403x 3 +0.4542x 2 -2.221x+13.159, the value range of x is 2.0776 mm≤x≤5.5311 mm; III-2 is y=0.0047x 6 -0.1116x 5 +1.0344x 4 -4.5647x 3 +8.9858x 2 -3.7023x+0.2147, the value range of x is 2.7978 mm≤x≤6.7981 mm; the third tooth in the bionic tooth structure is formed by curve III-1 and curve III-2.

[0008] As a preferred solution, the bionic blade is composed of 4 to 10 groups of identical bionic tooth-shaped structures.

[0009] As a preferred solution, the tooth height and tooth width of each group of bionic tooth structures of the bionic blade are the same.

[0010] As a preferred solution, the bionic blade is composed of 8 groups of identical bionic tooth-shaped structures.

[0011] As a preferred solution, each group of bionic tooth structures of the bionic blade consists of three teeth, with a tooth height H of 5.11 mm and a tooth width L of 8.16 mm.

[0012] The beneficial effects of the present invention are: The present invention optimizes the design of a bionic rotary tiller based on the lateral contour curve of the tiger beetle's mouthparts, and applies the lateral contour curve of the first three teeth of the tiger beetle's mouthparts to the blade design of the rotary tiller. The good bionic blade structure can reduce the total torque and the directional torque of the blade roller during rotary tillage operations, thereby reducing the power consumption of the rotary tillage process.

[0013] The experimental research results show that under different tillage depths (8-12 cm) and different blade roller speeds (250-350 r / min), the use of the bionic rotary tiller based on the lateral contour curve of the tiger beetle mouthparts can reduce the total torque of the rotary tillage operation by 9.81%, the blade roller directional torque by 8.50%, and the power consumption by 8.35%. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 A dotted diagram of the lateral outline of the first three teeth of the tiger beetle's mouthparts; Figure 2 An axonometric view of one embodiment of the bionic rotary tiller according to the present invention; Figure 3 This is a comparison chart of the total torque of the bionic rotary tiller (SSL) of the present invention and the traditional rotary tiller (CT) at different tillage depths; Figure 4 A comparison diagram of the torque in the x-axis direction (towards the blade roller) of the bionic rotary tiller (SSL) of the present invention and the traditional rotary tiller (CT) at different tillage depths; Figure 5 This is a comparison chart of power consumption of the bionic rotary tiller (SSL) of the present invention and the traditional rotary tiller (CT) at different tillage depths; Figure 6 This is a comparison chart of the total torque of the bionic rotary tiller (SSL) of the present invention and the traditional rotary tiller (CT) at different blade roller speeds; Figure 7 This is a comparison diagram of the torque in the x-axis direction (towards the blade roller) of the bionic rotary tiller (SSL) of the present invention and the traditional rotary tiller (CT) at different blade roller speeds; Figure 8 This is a comparison chart of power consumption of the bionic rotary tiller (SSL) of the present invention and the traditional rotary tiller (CT) at different blade roller speeds; Figure 9 Axonometric drawings of the bionic rotary tiller blade based on the lateral contour curve of the tiger beetle mouthparts and the traditional rotary tiller blade with different numbers of bionic tooth groups; Figure 10 A comparison of the total torque of the bionic rotary tiller based on the lateral profile curve of the tiger beetle mouthparts and the traditional rotary tiller with different numbers of bionic tooth groups; Figure 11 A comparison chart of the torque in the x-axis direction (blade roller direction) of the bionic rotary tiller based on the lateral profile curve of the tiger beetle mouthparts and the traditional rotary tiller with different numbers of bionic tooth groups; Figure 12 This is a comparison chart of the power consumption of the bionic rotary tiller based on the lateral contour curve of the tiger beetle mouthparts and the traditional rotary tiller with different numbers of bionic tooth groups. DETAILED DESCRIPTION

[0016] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that elements, structures, and features in one embodiment may also be beneficially combined in other embodiments without further description.

[0017] It should be noted that: unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons having ordinary skills in the field to which the invention belongs. The words "one", "an" or "the" and the like used in the patent application specification and claims of the present invention do not express a quantitative limitation, but rather indicate the presence of at least one. Words such as "include" or "comprise" indicate that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalents, but do not exclude other elements or objects with the same function.

[0018] Example 1 The specific structural composition, involved processes and technical effects of the bionic rotary tiller blade based on the lateral contour curve of the tiger beetle mouthparts of the present invention are described in detail below with reference to the accompanying drawings: It should be noted that the research foundation of this invention is based on the tooth structure of the tiger beetle. Tiger beetles are well-known insects found in tropical to temperate regions and are renowned for their vibrant metallic luster and agile predation. Their well-developed and hardy mouthparts are highly capable of cutting and shredding, thereby fragmenting and chewing captured food. The first three teeth of their mouthparts are primarily used for cutting and crushing food, while the fourth tooth is used for picking up and holding food. Therefore, the application of these first three teeth to the blade design of the rotary tiller has a strong theoretical basis.

[0019] The bionic rotary tiller blade based on the lateral contour curve of the tiger beetle mouthparts consists of a handle 1 and a blade body 2, wherein the blade body includes a bionic blade 3. The main innovation of the present invention lies in the design of the bionic blade 3, which will be described in detail as follows with reference to the accompanying drawings: like Figure 1 As shown, Figure 1The lateral contour of the front three teeth of the tiger beetle's mouthparts (i.e., i, ii, and iii) was drawn. The point cloud coordinates of the six bionic curves of the front three teeth of the tiger beetle's mouthparts (i.e., Ⅰ-1, Ⅰ-2, Ⅱ-1, Ⅱ-2, Ⅲ-1, and Ⅲ-2) were obtained using AutoCAD. The curves were then imported into Excel for curve fitting. The fitting equations are: I-1 is y=-0.1962x 3 +2.883x 2 -14.468x+40.746, the value range of x is 3.527 mm ≤ x ≤ 6.2159 mm; I-2 is y=-0.0047x 6 +0.1817x 5 -2.6515x 4 +19.27x 3 -74.873x 2 +148.7x-103.76, the value range of x is 2.6987 mm≤x≤6.2117 mm, and the first tooth in the bionic tooth structure is composed of bionic curve I-1 and bionic curve I-2; II-1 is y=-0.0691x 3 +0.8201x 2 -3.9027x+19.128, the value range of x is 2.5244 mm≤x≤4.7788 mm; Ⅱ-2 is y=-0.0464x 6 +1.0055x 5 -8.8129x 4 +40.026x 3 -99.322x 2 +127.46x-54.547, the value range of x is 1.6642 mm≤x≤4.779 mm, and the second tooth in the bionic tooth structure is composed of the bionic curve II-1 and the bionic curve II-2; III-1 is y=-0.0403x 3 +0.4542x 2 -2.221x+13.159, the value range of x is 2.0776 mm≤x≤5.5311 mm; Ⅲ-2 is y=0.0047x 6 -0.1116x 5 +1.0344x 4 -4.5647x 3 +8.9858x 2-3.7023x+0.2147, the value range of x is 2.7978 mm≤x≤6.7981 mm; the third tooth in the bionic tooth structure is composed of the bionic curve III-1 and the bionic curve III-2.

[0020] The determination coefficients (R 2 ) are all greater than 0.95, indicating that the fitting curve is very close to the outer contour curve of the first three teeth and can accurately describe the outer contour characteristics of the first three teeth of the tiger beetle mouthparts; Six bionic curves are obtained through the above steps, and the three tooth shapes composed of the six bionic curves are proportionally enlarged and stretched to obtain a complete bionic tooth shape structure. The obtained bionic tooth shape structure is then arrayed along the direction of the bionic blade outer contour curve, so that several groups of bionic tooth shape structures cover the entire bionic blade outer contour.

[0021] Figure 2 A bionic rotary tiller blade obtained based on the above steps, in this embodiment, comprises a handle 1 and a blade body 2, wherein the blade body 2 has a bionic blade 3; the bionic blade 3 is obtained by proportionally amplifying and laterally stretching the contour curve of the first three teeth of the tiger beetle's mouthparts using SolidWorks software to obtain a bionic tooth-shaped structure. Finally, eight groups of bionic tooth-shaped structures are arranged along the entire outer contour curve of the bionic blade, each group of bionic tooth-shaped structures having the same tooth height and tooth width, with a tooth width of L = 8.16 mm and a tooth height of H = 5.11 mm. In order to verify the effectiveness of the rotary tiller blade prepared by the present invention, the total torque, blade roller direction torque, and power consumption of the rotary tiller blade (SSL) composed of eight groups of bionic tooth structures prepared in this embodiment were studied under different operating parameters. The test results are as follows: Figure 3 The figure shows a comparison of the total torque of the bionic rotary tiller (SSL) of the present invention and the traditional rotary tiller (CT) at different tillage depths; Figure 4 A comparison diagram of the torque in the blade roller direction of the bionic rotary tiller (SSL) of the present invention and the traditional rotary tiller (CT) at different tillage depths; Figure 5 This is a power comparison chart of the bionic rotary tiller (SSL) of the present invention and the traditional rotary tiller (CT) at different tillage depths; Figure 6 The figure is a comparison of the total torque of the bionic rotary tiller (SSL) of the present invention and the traditional rotary tiller (CT) at different blade roller speeds (250-350 r / min); Figure 7 This is a comparison diagram of the torque in the blade roller direction of the bionic rotary tiller (SSL) of the present invention and the traditional rotary tiller (CT) at different blade roller speeds; Figure 8 This is a power comparison chart of the bionic rotary tiller (SSL) and the traditional rotary tiller (CT) described in the present invention; The test results show that under different tillage depths and different blade roller speeds, compared with the traditional rotary tiller (CT), the bionic rotary tiller (SSL) described in the present invention can reduce the total torque of the rotary tillage operation by 9.81%, the blade roller direction torque by 8.50%, and the power consumption by 8.35%.

[0022] The bionic rotary tiller (SSL) described in the above embodiment is obtained by using an array of 8 bionic tooth structures. It should be noted that in the present invention, the bionic blade of the rotary tiller can be composed of 4 to 10 groups of the same bionic tooth structure. In order to verify the performance of the bionic rotary tiller based on the lateral profile curve of the tiger beetle mouthparts with different numbers of bionic tooth groups, the following specific analysis is conducted: When designing different numbers of bionic teeth for the entire blade profile, it is necessary to consider that: since the bionic teeth are scaled proportionally, the width of the blade curve of the rotary blade remains unchanged when designing the bionic blade, and the bionic tooth shape structure set needs to cover the entire blade curve width. Therefore, when setting different numbers of groups, the bionic teeth will produce different tooth heights and tooth widths. The following description takes the bionic blade 1 with 4, 5, 6, 7, 9, and 10 groups of bionic teeth as comparative examples. Figure 9 As shown, Figure 9 (a)-(f) are the axonometric views of rotary tillers with 4, 5, 6, 7, 9, and 10 sets of bionic teeth, respectively. Figure 9 Middle (g) is the axonometric view of the conventional rotary tiller (CT); Combined with attachment Figure 10-12 The comparison chart of total torque, blade roller direction torque and power consumption of the bionic rotary tiller (SSL) of the present invention, the bionic rotary tiller defined in 6 comparative examples and the traditional rotary tiller (CT) is analyzed; wherein, Figure 10 This is a comparison chart of the total torque of the bionic rotary tiller (SSL) based on the lateral profile curve of the tiger beetle mouthparts of the present invention, the traditional rotary tiller (CT), comparative example 1 (DBL-1), comparative example 2 (DBL-2), comparative example 3 (DBL-3), comparative example 4 (DBL-4), comparative example 5 (DBL-5), and comparative example 6 (DBL-6). Figure 11 The figure is a comparison of the torque in the blade roller direction of the present invention (SSL), the traditional rotary tiller (CT), and comparative examples 1 to 6 (DBL-1 to DBL-6). Figure 12 The figure shows a comparison of power consumption among the present invention (SSL), the conventional rotary tiller (CT), and comparative examples 1 to 6 (DBL-1 to DBL-6).

[0023] Comparative Example 1 Figure 9(a) is comparative example 1 of the present invention. The bionic blade 1 adopts 4 groups of bionic tooth structures. The tooth width of the bionic tooth structure is L=19.84 mm and the tooth height is H=10.36 mm. Combined with the test results, it is shown that when the tillage depth is 10 cm and the blade roller speed is 300 r / min, compared with the traditional rotary tiller (CT), the total torque of this comparative example is reduced by 2.77%, the torque in the blade roller direction is increased by 0.15%, and the power consumption is reduced by 2.85%.

[0024] Comparative Example 2 Figure 9 Middle (b) is comparative example 2 of the present invention. The bionic blade 1 adopts 5 groups of bionic tooth structures. The tooth width of the bionic tooth structure is L=16.67 mm and the tooth height is H=8.71 mm. The experimental research results show that when the tillage depth is 10 cm and the blade roller speed is 300 r / min, compared with the traditional rotary tiller (CT), the total torque of the comparative example is reduced by 4.73%, the torque in the blade roller direction is reduced by 3.16%, and the power consumption is reduced by 6.19%.

[0025] Comparative Example 3 Figure 9 Middle (c) is Comparative Example 3 of the present invention. The bionic blade 1 adopts 6 groups of bionic tooth structures. The tooth width of the bionic tooth structure is L=11.11 mm and the tooth height is H=6.96 mm. The experimental research results show that when the tillage depth is 10 cm and the blade roller speed is 300 r / min, compared with the traditional rotary tiller (CT), the total torque of the comparative example is reduced by 4.10%, the torque in the blade roller direction is reduced by 2.20%, and the power consumption is reduced by 3.02%.

[0026] Comparative Example 4 Figure 9 Middle (d) is comparative example 4 of the present invention. The bionic blade 1 adopts 7 groups of bionic tooth structures. The tooth width of the bionic tooth structure is L=10.20 mm and the tooth height is H=6.39 mm. The experimental research results show that when the tillage depth is 10 cm and the blade roller speed is 300 r / min, compared with the traditional rotary tiller (CT), the total torque of the comparative example is reduced by 3.39%, the torque in the blade roller direction is reduced by 1.06%, and the power consumption is reduced by 3.74%.

[0027] Comparative Example 5 Figure 9 Middle (e) is comparative example 5 of the present invention. The bionic blade 1 adopts 9 groups of bionic tooth structures. The tooth width of the bionic tooth structure is L=6.80 mm and the tooth height is H=4.26 mm. The experimental research results show that when the tillage depth is 10 cm and the blade roller speed is 300 r / min, compared with the traditional rotary tiller (CT), the total torque of the comparative example is reduced by 3.45%, the torque in the blade roller direction is reduced by 2.17%, and the power consumption is reduced by 3.63%.

[0028] Comparative Example 6 Figure 9 Middle (f) is Comparative Example 6 of the present invention. The bionic blade 1 adopts 10 groups of bionic tooth structures. The tooth width of the bionic tooth structure is L=6.17 mm and the tooth height is H=3.87 mm. The experimental research results show that when the tillage depth is 10 cm and the blade roller speed is 300 r / min, compared with the traditional rotary tiller (CT), the total torque of the comparative example is reduced by 2.54%, the torque in the blade roller direction is reduced by 0.68%, and the power consumption is reduced by 2.17%.

[0029] In summary, it can be seen that in the present invention, compared with the traditional rotary tiller (CT), the total torque of the bionic rotary tiller (SSL) obtained by using 8 groups of bionic tooth profile structure arrays is reduced by 9.81%, the torque in the blade roller direction is reduced by 8.50%, and the power consumption is reduced by 8.35%. It can be seen that the technical effect achieved by the bionic rotary tiller (SSL) obtained by using 8 groups of bionic tooth profile structure arrays is better than that of the above 6 comparative examples. When the bionic blade is composed of 8 groups of identical bionic tooth profile structures, the comprehensive performance of the bionic rotary tiller is optimal.

[0030] It should be noted that the conventional rotary tiller (CT) described in this article is an existing technology, wherein the cutting edge curve used by the conventional rotary tiller (CT) is: y = 0.0084x³ + 0.2289x² + 4.1766x - 177.24 Among them, 6.71 mm ≥ x ≥ -13.26 mm.

[0031] Parts not described in detail in this embodiment are prior art.

[0032] It should be noted that although the present invention has been described with reference to the above embodiments, the present invention may also have other various embodiments. Without departing from the spirit and scope of the present invention, it is obvious that those skilled in the art may make various corresponding changes and modifications to the present invention, and such changes and modifications shall fall within the scope of protection of the appended claims and their equivalents.

Claims

1. A bionic rotary tiller blade based on the lateral contour curve of the tiger beetle's mouthparts, consisting of a handle and a blade, characterized by: The blade includes a bionic blade, which is obtained by proportionally enlarging and stretching the lateral contour curve of the front three teeth of the tiger beetle's mouthparts to obtain a bionic tooth-shaped structure, and then arraying the obtained bionic tooth-shaped structures along the direction of the bionic blade's outer contour curve.

2. The bionic rotary tiller blade based on the lateral contour curve of the tiger beetle mouthparts according to claim 1, characterized in that: The bionic tooth-shaped structures are three tooth-shaped structures obtained by enlarging and stretching six bionic curves in equal proportions.

3. The bionic rotary tiller blade based on the lateral contour curve of the tiger beetle mouthparts according to claim 2, characterized in that: The equations of the six bionic curves are: I-1 is y=-0.1962x 3 +2.883x 2 -14.468x+40.746, the value range of x is 3.527 mm≤x≤6.2159 mm; I-2 is y=-0.0047x 6 +0.1817x 5 -2.6515x 4 +19.27x 3 -74.873x 2 +148.7x-103.76, the value range of x is 2.6987 mm≤x≤6.2117 mm, and the first tooth in the bionic tooth structure is formed by curve I-1 and curve I-2; II-1 is y=-0.0691x 3 +0.8201x 2 -3.9027x+19.128, the value range of x is 2.5244 mm≤x≤4.7788 mm; Ⅱ-2 is y=-0.0464x 6 +1.0055x 5 -8.8129x 4 +40.026x 3 -99.322x 2 +127.46x-54.547, the value range of x is 1.6642 mm≤x≤4.779 mm, and the curve II-1 and curve II-2 constitute the second tooth in the bionic tooth structure; III-1 is y=-0.0403x 3 +0.4542x 2 -2.221x+13.159, the value range of x is 2.0776 mm≤x≤5.5311 mm; III-2 is y=0.0047x 6 -0.1116x 5 +1.0344x 4 -4.5647x 3 +8.9858x 2 -3.7023x+0.2147, the value range of x is 2.7978 mm≤x≤6.7981 mm; the third tooth in the bionic tooth structure is formed by curve III-1 and curve III-2.

4. The bionic rotary tiller blade based on the lateral contour curve of the tiger beetle mouthparts according to claim 1 or 2, characterized in that: The bionic blade is composed of 4 to 10 groups of identical bionic tooth-shaped structures.

5. The bionic rotary tiller blade based on the lateral contour curve of the tiger beetle mouthparts according to claim 4, characterized in that: The tooth height and tooth width of each group of bionic tooth structures of the bionic blade are the same.

6. The bionic rotary tiller blade based on the lateral contour curve of the tiger beetle mouthparts according to claim 4, characterized in that: The bionic blade is composed of 8 groups of identical bionic tooth-shaped structures.

7. The bionic rotary tiller blade based on the lateral contour curve of the tiger beetle mouthparts according to claim 6, characterized in that: Each group of bionic tooth structures of the bionic blade consists of three teeth, with a tooth height H of 5.11 mm and a tooth width L of 8.16 mm.

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