Anti-drag subsoiler imitating crabs and chops

Abstract

The invention discloses a crab-claw-imitating anti-drag subsoiler, and relates to the technical field of agricultural farming mechanical equipment. The subsoiler comprises an arc-shaped shovel handle, a shovel tip is arranged at the lower end of the shovel handle, and wing shovels are symmetrically arranged on the two sides close to the shovel tip. The soil touching working face of the shovel tip is manufactured through equal-proportion amplification and transverse stretching on the basis of a crab-claw profile curve, the section of the soil touching working face is a specific curve, and tillage resistance can be reduced. The wing shovel is composed of a resistance reduction plate and bamboo shoot tip-like resistance reduction structures, the bamboo shoot tip-like resistance reduction structures are distributed at equal intervals in the length direction of the wing shovel, the section of the upper surface of each bamboo shoot tip-like resistance reduction structure is a specific curve, and resistance can be further reduced and soil blocks can be further crushed. An inner cutting edge and an outer cutting edge are arranged on the inner side face of a shovel handle arc section of the arc shovel handle, the thickness of a resistance reducing plate of the wing shovel is 3-5 mm, and the edge of the resistance reducing plate is S-shaped. Through optimization design, the resistance and energy consumption of deep scarification operation are reduced by utilizing a bionic technology, the tillage mechanical property is optimized, and the energy-saving deep scarification device has a remarkable energy-saving effect and a good application prospect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural tillage machinery equipment, in particular to a crab claw imitating resistance reducing deep scarification shovel design. BACKGROUND

[0002] Deep scarification is an important soil tillage technology in modern agriculture. Through deep scarification shovels and other special components, deep scarification can effectively break the hardpan and compact plough bottom layer, improve soil structure permeability, promote water infiltration and root growth, and create favorable conditions for high yield. As the core touch component, the shovel tip area is prone to blade wear and structural deformation due to long-term contact with hard soil, resulting in increased tillage energy consumption and increased mechanical failure rate. Therefore, reducing the soil tillage resistance of deep scarification shovels, reducing the wear of deep scarification shovel tips, and prolonging the service life of deep scarification shovels are urgent problems in deep scarification technology.

[0003] The crab claw limb has a unique streamline profile and clamping force distribution mechanism formed in long-term evolution. The arc curvature of the outer edge can disperse the excavation resistance. This biomechanical characteristic enables crabs to not only penetrate dense soil layers but also to direct the throwing of soil along a specific trajectory, greatly reducing energy consumption. Therefore, applying crab claw curves to deep scarification shovel tip design has a strong theoretical basis.

[0004] The Chinese invention patent with publication number CN115735436A, which was applied for by the applicant in 2022, is a bionic deep scarification shovel based on the lateral profile curve of the golden chrysalis head, which can reduce the average horizontal tillage resistance of deep scarification by 11.33%, which is beneficial to energy saving. However, the working efficiency of this patent still needs to be improved in actual work. SUMMARY

[0005] To solve the above technical problems, the present application proposes a crab claw imitating resistance reducing deep scarification shovel to further reduce the tillage resistance of deep scarification shovels, reduce the wear of deep scarification shovel tips, and prolong the service life of deep scarification shovels.

[0006] The technical solution adopted by the present application is: a crab claw imitating resistance reducing deep scarification shovel, comprising a circular arc shaped shovel handle, the lower end of the shovel handle is provided with a shovel tip, the lower end of the shovel handle is provided with wing shovels on both sides near the shovel tip, the shovel tip comprises a soil contact working surface, the soil contact working surface is a curve, and the curve equation Y1 is: In the formula, the value range of X1 is 2596mm≤X1≤2685mm; Further, the wing shovel is composed of a drag reduction plate connected to the side of the shovel handle and a plurality of imitation bamboo shoot tip drag reduction structures, one side of the drag reduction plate is connected to the shovel handle, the other side is in contact with the soil, the imitation bamboo shoot tip drag reduction structures are arranged equidistantly along the length direction of the wing shovel on the drag reduction plate, the upper surface profile of the imitation bamboo shoot tip drag reduction structures is a curve, and the curve equation Y2 is: In the formula, the value range of X2 is 3536mm≤X2≤3578mm.

[0007] As a preferred solution, the soil-contacting working surface of the wing shovel is obtained by equal-scale magnification and transverse stretching based on the crab claw profile curve, the distance between the two endpoints of the curve is L0, the obtained curve is equal-scale magnified with a magnification ratio of L / L0, and the profile curve after magnification is transversely stretched by a distance B to obtain the soil-contacting working surface of the wing shovel.

[0008] As a preferred solution, the connecting shovel handle surface is further provided with a first shovel tip connecting hole and a second shovel tip connecting hole for fixing with the circular-arc-shaped shovel handle, and the two are vertically arranged from top to bottom.

[0009] As a preferred solution, the imitation bamboo shoot tip drag reduction structures are arranged in three columns on the upper surface of the wing shovel and equidistantly distributed along the length direction of the wing shovel, and the top of the protrusion is circular-arc-shaped.

[0010] As a preferred solution, the circular-arc-shaped shovel handle comprises a shovel handle straight handle section, a shovel handle circular-arc section and a connecting shovel tip section, the three sections are sequentially connected from top to bottom to form the circular-arc-shaped shovel handle, the shovel handle straight handle section is provided with a plurality of deep loosening shovel fixing holes for fixing, and the connecting shovel tip section is provided with a first shovel handle connecting hole and a second shovel handle connecting hole for fixing the shovel tip from top to bottom.

[0011] As a preferred solution, the inner side surface of the shovel handle circular-arc section is provided with an inner cutting edge and an outer cutting edge, the radius R1 of the inner cutting edge is 303-308mm, and the radius R2 of the outer cutting edge is 318-322mm.

[0012] As a preferred solution, the thickness of the drag reduction plate in the wing shovel is 3-5mm, and the edge of the drag reduction plate is S-shaped.

[0013] The beneficial effects of the present application are: Firstly, the drag reduction deep loosening shovel based on the crab claw can reduce the deep loosening operation resistance and energy consumption through optimized design. The indoor soil tank test and discrete element simulation test results show that, compared with the bionic drag reduction deep loosening shovel based on the lateral profile curve of the golden crab head in the patent with the publication number CN115735436A, the use of the imitation crab claw drag reduction deep loosening shovel can reduce the deep loosening operation resistance by an average of 12.955% under different tillage depths (250-350mm) and tillage speeds (0.5-2.5m / s).

[0014] Secondly, the wing blade edge in the application is designed as S-shaped, the working surface of which is integrated with a resistance-reducing structure in the shape of a bamboo shoot tip, which greatly improves the service life of the wing blade through stress dispersion mechanism; the mechanical crushing of soil clods is realized by the interaction of the protrusions with the soil; the relative contact position of the wing blade surface and the soil shear surface is changed, the soil movement on the wing blade surface is changed from sliding to rolling, and the tillage resistance of the soil is reduced, thereby greatly optimizing the tillage mechanical properties. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0016] Figure 1 It is a front view of the crab claw resistance-reducing deep scarifier of the present application; Figure 2 It is an axonometric view of the blade tip of the crab claw resistance-reducing deep scarifier of the present application; Figure 3 It is a plan view of the blade tip of the crab claw resistance-reducing deep scarifier of the present application; Figure 4 It is a plan view of the wing blade of the crab claw resistance-reducing deep scarifier of the present application; Figure 5 It is a crab claw profile curve diagram; Figure 6 It is a bamboo shoot tip profile curve diagram; Figure 7 It is a horizontal tillage resistance comparison diagram of the crab claw resistance-reducing deep scarifier of the present application and the bionic resistance-reducing deep scarifier based on the lateral profile curve of the head of the golden cicada under different tillage depths; Figure 8 It is a horizontal tillage resistance comparison diagram of the crab claw resistance-reducing deep scarifier of the present application and the bionic resistance-reducing deep scarifier based on the lateral profile curve of the head of the golden cicada under different tillage speeds.

[0017] In the figure: 1, circular-arc-shaped blade handle, 101, deep scarifier fixing hole, 102, straight handle section of blade handle, 103, circular-arc section of blade handle, 104, connecting blade tip section, 105, first blade handle connecting hole, 106, second blade handle connecting hole, 2, blade tip, 201, connecting blade handle surface, 202, soil-contacting working surface, 203, first blade tip connecting hole, 204, second blade tip connecting hole, 205, left side surface of blade tip, 206, right side surface of blade tip, 207, wear-resistant surface, 3, wing blade, 301, resistance-reducing plate, 302, bionic bamboo shoot tip resistance-reducing structure. DETAILED DESCRIPTION

[0018] The application will now be described in greater detail by way of example only with reference to the accompanying drawings in which:

[0019] It should be noted that the technical terms or scientific terms used herein should be understood as the common meanings understood by those with ordinary skill in the art to which the present application pertains unless otherwise defined. The terms "one", "an" or "the" and similar words used in the specification and claims of the present patent application are not meant to refer to only one instance but rather to one or more instances; the terms "include", "including", "contain", "containing" and similar words are meant to encompass the elements or objects listed after the terms "include", "including", "contain", "containing" and similar words and their equivalents, but do not exclude other elements or objects.

[0020] Reference Figures 1 to 3 The crab claw resistance reduction deep scarification shovel of the present application is composed of a circular arc shaped shovel handle 1 and a shovel tip 2, wherein the circular arc shaped shovel handle 1 is a national standard heavy duty circular arc shaped shovel handle, including a deep scarification shovel fixing hole 101, a shovel handle straight handle section 102, a shovel handle circular arc section 103, a connecting shovel tip section 104, a first shovel handle connecting hole 105 and a second shovel handle connecting hole 106, the shovel handle width a is 80mm, the total height H is 706.5mm, the outer circular arc radius R0 is 320mm, the inner side of the shovel handle circular arc section is provided with an inner cutting edge and an outer cutting edge, wherein the radius R1 of the inner cutting edge is 303-308mm, and the radius R2 of the outer cutting edge is 318-322mm. The length L of the shovel tip 2 is 165mm, and the width B is 40mm, including a connecting shovel handle surface 201, a soil working surface 202, a first shovel tip connecting hole 203, a second shovel tip connecting hole 204, a left side surface of the shovel tip 205, a right side surface of the shovel tip 206, and a wear-resistant surface 207, wherein the shovel tip 2 is enclosed by the connecting shovel handle surface 201, the soil working surface 202, the left side surface of the shovel tip 205, the right side surface of the shovel tip 206, and the wear-resistant surface 207, wherein the wear-resistant surface 207 is located at the tip of the shovel tip 2, and the wear-resistant surface 207 is connected with the left side surface of the shovel tip 205 and the right side surface of the shovel tip 206; the shovel tip 2 and the circular arc shaped shovel handle 1 are connected by the first shovel handle connecting hole 105, the second shovel handle connecting hole 106, the first shovel tip connecting hole 203 and the second shovel tip connecting hole 204, and are connected by bolts.

[0021] In this embodiment, the soil-contacting working surface 202 is obtained by proportionally enlarging and stretching the outline curve of a crab claw. The specific process is as follows: two marked dots are made on the crab claw, the actual distance between the two points is recorded, a photo of the crab claw outline is taken, and the image is imported into AutoCAD software. The dimensions between the two marked points are marked, and the entire image is scaled proportionally. The scaling ratio is the ratio of the actual dimension between the two marked points to the marked dimension. Points are plotted on the scaled crab claw outline, and then curve fitting is performed using Excel software. The curve equation Y1 obtained by fitting is: In the formula, the value of X1 ranges from 2596mm to 2685mm. The crab claw contour curve obtained by fitting is as follows: Figure 5 As shown, the distance between the two endpoints of the curve is L0. The obtained curve is enlarged proportionally by a ratio of L / L0; the enlarged contour curve is stretched laterally by a distance of B, thus obtaining the soil contact working surface 202 of the shovel tip 2.

[0022] The working surface of the wing shovel 3 of this invention, which is designed to mimic the drag reduction of a bamboo shoot tip, integrates a bamboo shoot tip-shaped drag-reducing structure 302. The cross-section of the upper surface is curved, and the equation of the curve Y2 is: In the formula, the value of X2 ranges from 3536mm to 3578mm. The fitted contour curve of the bamboo shoot tip is as follows: Figure 6 As shown.

[0023] In this embodiment, the wing shovel 3 is provided with three sets of longitudinally arranged bamboo shoot-tip drag-reducing structures 301. The bamboo shoot-tip drag-reducing structures 302 are arranged in a regular array on the upper surface of the drag-reducing plate 301, and the top of each protrusion adopts an arc design. The drag-reducing plate 301 in the wing shovel 3 is 4mm thick and has an S-shaped edge, which guides the soil and helps to reduce tillage resistance.

[0024] Figure 7 and Figure 8 The figures show a comparison of the horizontal tillage resistance of the crab claw-inspired drag-reducing deep loosening shovel and the biomimetic drag-reducing deep loosening shovel based on the lateral contour curve of a cicada's head under different tillage depths and tillage speeds. Indoor soil trough experiments and discrete element simulation experiments show that, compared with the biomimetic drag-reducing deep loosening shovel based on the lateral contour curve of a cicada's head published in patent CN115735436A, the crab claw-inspired drag-reducing deep loosening shovel of this invention can reduce the average horizontal tillage resistance by 13.16% at different tillage depths (250-350mm); and at different tillage speeds (0.5-2.5m / s), it can reduce the average horizontal tillage resistance by 12.75%.

[0025] It should be noted that, although the application has been described by way of example with reference to the above embodiments, the application can be embodied in other ways. Various modifications and changes can be apparent to those skilled in the art without departing from the spirit and scope of the application, and such modifications and changes should be construed as falling within the scope of the appended claims and equivalents thereof.

Claims

1. A crab claw-inspired drag-reducing deep-loosening shovel, characterized in that: The shovel includes an arc-shaped handle (1), with a shovel tip (2) at the lower end of the handle. Symmetrical wing blades (3) are located on both sides of the lower end of the handle near the shovel tip. The shovel tip (2) includes a soil-contacting working surface (202), the cross-section of which is a curve, and its curve equation Y1 is... The value of X1 in the formula is 2596mm≤X1≤2685mm; The wing shovel (3) is composed of a drag-reducing plate (301) connected to the side of the shovel handle and several imitation bamboo shoot-tip drag-reducing structures (302). The imitation bamboo shoot-tip drag-reducing structures (302) are equidistantly distributed on the drag-reducing plate (301) along the length of the wing shovel (3), and the cross-section of its upper surface is a curve, the equation of which is Y2. The value of X2 in the formula is in the range of 3536mm≤X2≤3578mm.

2. The crab claw-inspired drag-reducing deep-loosening shovel according to claim 1, characterized in that, The soil contact working surface (202) is obtained by proportionally enlarging and laterally stretching the contour curve of the crab claw. The distance between the two endpoints of the curve is L0. The obtained curve is enlarged proportionally, and the enlargement ratio is L / L0. The enlarged contour curve is laterally stretched by a distance of B to obtain the soil contact working surface (202) of the shovel tip (2).

3. The crab claw-inspired drag-reducing deep-loosening shovel according to claim 1, characterized in that, The shovel tip (2) is formed by the connecting shovel handle surface (201), the soil contact working surface (202), the left side surface (205) of the shovel tip, the right side surface (206) of the shovel tip, and the wear-resistant surface (207). The wear-resistant surface (207) is located at the lower end of the upper surface of the shovel tip (2). The soil contact working surface (202) is connected to the wear-resistant surface (207) and is set together on the upper surface of the shovel tip (2). The soil contact working surface (202) together with the left side surface (205) and the right side surface (206) of the shovel tip forms the shovel tip (2).

4. The crab claw-inspired drag-reducing deep-loosening shovel according to claim 3, characterized in that, The connecting shovel handle surface (201) is also provided with a first shovel tip connecting hole (203) and a second shovel tip connecting hole (204) for fixing to the arc-shaped shovel handle (1), and the two are arranged vertically from top to bottom.

5. The crab claw-inspired drag-reducing deep-loosening shovel according to claim 1, characterized in that, The imitation bamboo shoot tip drag reduction structure (302) is fixed in three rows on the upper surface of the wing shovel (3) and is distributed at equal intervals along the length of the wing shovel (3). The top of the imitation bamboo shoot tip drag reduction structure (302) is arc-shaped.

6. The crab claw-inspired drag-reducing deep-loosening shovel according to claim 1, characterized in that, The arc-shaped shovel handle (1) includes a straight handle section (102), an arc-shaped handle section (103), and a connecting shovel tip section (104), which are connected from top to bottom to form the arc-shaped shovel handle (1). The straight handle section (102) is provided with a plurality of deep loosening shovel fixing holes (101) for fixing. The connecting shovel tip section (104) is provided with a first shovel handle connecting hole (105) and a second shovel handle connecting hole (106) for fixing the shovel tip (2) from top to bottom.

7. The crab claw-inspired drag-reducing deep-loosening shovel according to claim 6, characterized in that, The inner side of the arc segment (103) of the shovel handle is provided with an inner cutting edge and an outer cutting edge.

8. The crab claw-inspired drag-reducing deep-loosening shovel according to claim 7, characterized in that, The radius R1 of the inner cutting edge is 303-308 mm, and the radius R2 of the outer cutting edge is 318-322 mm.

9. The crab claw-inspired drag-reducing deep-loosening shovel according to claim 1, characterized in that, The drag-reducing plate (301) in the wing shovel (3) has a thickness of 3-5mm and the edge of the drag-reducing plate (301) is S-shaped.

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