Orchard mower bionic three-jaw flail knife based on six-gill shark teeth

Abstract

The utility model relates to an orchard mower bionic three-jaw flail knife based on six-gill shark teeth, a blade of an inclined knife head comprises a conical first blade part, a conical second blade part and a conical third blade part, the inclination angle of the third blade part is larger than that of the second blade part, the third blade part and the second blade part are both in a sawtooth shape, and the third blade part and the second blade part are both in a sawtooth shape. The height and span of sawteeth of the third blade part are smaller than those of sawteeth of the second blade part. When the grass chopper is used, the first blade part has piercing and partial cutting functions, the second blade part has cutting and section trimming functions, and the third blade part is used for further chopping grass. Compared with a common mowing flail knife, the scheme has the advantages that the cutting efficiency is higher, the resistance is smaller, the cutting surface is smoother, the anti-seismic property is better, the geometrical shape curve of the sawteeth simulates the teeth of the six-gill shark, and when the rotating shaft rotates at a high speed, the condition that the six-gill shark bite a prey can be simulated, so that the inclined knife can easily cut weeds, and the orchard pruning operation is realized.

Description

Technical Field

[0001] This utility model relates to the field of weed control, and more particularly to the field of mowing technology, specifically referring to a biomimetic three-clawed blade for an orchard mower based on the teeth of a sixgill shark. Background Technology

[0002] Orchard mowers are essential tools in mechanized orchard production, used to trim weeds. Their emergence and development stemmed from the demands of agricultural modernization. With the expansion of orchard areas and changes in crop cultivation patterns, manual weeding has become increasingly difficult and inefficient. To improve labor efficiency while protecting fruit tree root systems from damage, a specialized orchard mower is urgently needed.

[0003] Bionics is an ancient yet ever-evolving discipline. It involves studying the structure and function of living organisms to invent new devices, tools, and technologies, creating advanced technologies applicable to production, learning, and daily life. Common examples of bionics include bats and radar, vibrating gyroscopes, and voltaic batteries. Sharks possess sharp teeth, and since both shark teeth and grass-cutting involve tearing and cutting, studying shark teeth can be used to find bionic solutions for grass-cutting.

[0004] Sixgill sharks typically have multiple rows of teeth, approximately 20 to 30 teeth per mouth. The multi-row arrangement of the teeth means that when they lose a tooth, the next tooth quickly moves forward to replace it, ensuring they always have enough cutting tools when hunting. Sixgill shark teeth are relatively sharp and serrated. This serrated edge makes them more efficient at capturing and tearing prey, especially mollusks and fish, easily ripping their flesh. Sharp cutting edges: The edges of the teeth are very sharp, suitable for tearing and cutting prey, especially effectively handling thick-fleshed prey. The serrated structure of shark teeth increases the cutting surface area, allowing for efficient cutting and tearing of prey during hunting. Therefore, this design improves cutting efficiency by mimicking the bionic cutting blade of the sixgill shark's teeth. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a biomimetic three-clawed blade for an orchard lawn mower based on the teeth of a sixgill shark, which improves mowing efficiency and protects the root system of fruit trees from damage.

[0006] This utility model is achieved through the following technical solution: a biomimetic three-clawed blade for an orchard lawn mower based on the teeth of a sixgill shark, comprising a blade assembly mounted on a rotating shaft. The blade assembly includes a slanted blade bent to one side. The blade head of the slanted blade includes a conical first cutting edge, a second cutting edge located to the left of the first cutting edge and inclined upward from left to right, and a third cutting edge located to the right of the first cutting edge and inclined upward from right to left, and located below the second cutting edge. The inclination angle of the third cutting edge is greater than that of the second cutting edge. Both the third and second cutting edges are serrated, and the height and span of the serrations in the third cutting edge are smaller than those in the second cutting edge.

[0007] In use, this invention involves rotating the blade head so that its right side is positioned at the lower left end. The rotating shaft then drives the oblique blade to rotate, thus cutting weeds at an angle. The first blade has a piercing and partial cutting function, the second blade cuts and trims the cut surface, and the third blade further shreds the weeds. Compared to ordinary lawnmowers, this design offers higher cutting efficiency, less resistance, a smoother cut surface, and better shock resistance. The geometric curves of the serrations mimic the teeth of a sixgill shark, simulating the shark's bite when the shaft rotates at high speed, allowing the oblique blade to easily cut weeds and facilitate orchard pruning.

[0008] As a preferred option, the equation for the third cutting edge is:

[0009] in: .

[0010] Preferably, the equation of the hypotenuse connecting the first and third cutting edges is:

[0011] in: .

[0012] Preferably, the curve of the second cutting edge is fitted with a sawtooth wave equation.

[0013] Preferably, the cutter assembly includes a support frame, and two oblique blades and one straight blade detachably connected to the support frame. The straight blade is located between the two oblique blades, and the two oblique blades are symmetrically arranged about the straight blade. The oblique blades are bent away from the straight blade.

[0014] This preferred design, with its combination of a straight blade and two angled blades, allows the cutting assembly to cover a larger area during rotation, enabling rapid cutting of vegetation. The centrifugal force generated by the high-speed rotation further enhances the cutting power, easily handling weeds of varying densities.

[0015] Preferably, the angle between the straight cutter and the bevel cutter is 45-50°.

[0016] Preferably, a number of cutter groups are evenly arranged on the rotating shaft in the circumferential direction to form a cutter unit. The cutter units are arranged on the rotating shaft in the axial direction, and the cutter groups between two adjacent cutter units are staggered in the axial direction. The axis of the rotating shaft extends laterally or longitudinally.

[0017] This preferred solution improves mowing efficiency by setting up a cutter assembly and a cutter unit. The vertical rotation of the mowing unit offers a significant improvement in safety compared to the horizontal rotation of the turntable, while also greatly reducing damage to tree roots.

[0018] The beneficial effects of this invention are as follows: the rotating shaft drives the oblique blades to rotate, thereby achieving the oblique blades' ability to cut weeds. Simultaneously, the first blade has a piercing and partial cutting function, the second blade has a cutting and trimming function, and the third blade further shreds the weeds. Compared to ordinary lawnmowers, this design offers higher cutting efficiency, lower resistance, a smoother cutting surface, and better shock resistance. The geometric curves of the serrations mimic the teeth of a sixgill shark, simulating the sixgill shark's bite when the shaft rotates at high speed, allowing the oblique blade assembly to easily cut weeds and facilitate orchard pruning operations. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the present invention;

[0020] Figure 2 This is a three-dimensional view of the oblique cutter head of this utility model;

[0021] Figure 3 This is a plan view of the oblique cutter head of this utility model;

[0022] Figure 4 This is a curve diagram of the oblique cutter head of this utility model;

[0023] Figure 5 This is a utility model Figure 4 Coordinate graph of the ef segment curve;

[0024] Figure 6 This is a utility model Figure 4 Coordinate graph of the middle fh segment curve;

[0025] Figure 7 This is a utility model Figure 4 The coordinate graph of the middle segment of the curve;

[0026] Figure 8 This is a diagram showing the usage state of this utility model;

[0027] As shown in the figure:

[0028] 1. Angled blade, 2. Straight blade, 3. Support frame, 4. Bolt, 5. Blade of the blade head, 6. Cutting blade assembly, 7. Rotary shaft, 201. Second cutting edge, 202. First cutting edge, 203. Third cutting edge, 204. Tail tooth of the third cutting edge. Detailed Implementation

[0029] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0030] See attached document Figure 1-8 This utility model discloses a biomimetic three-clawed blade for an orchard mower based on the teeth of a sixgill shark. It includes a blade assembly 6, which extends radially along a rotating shaft 7. Two blade assemblies 6 arranged circumferentially along the rotating shaft 7 form a blade unit. Several blade units are arranged axially along the rotating shaft 7. The blade assemblies 6 on two adjacent blade units are arranged at intervals. On the projection along the rotating shaft 7 axially, the four blade assemblies 6 in two adjacent blade units are evenly arranged circumferentially.

[0031] The axis of the rotating shaft 7 is located on a horizontal plane, and the rotating shaft 7 extends laterally or longitudinally on the horizontal plane.

[0032] The cutting blade assembly 6 includes a support frame 3, and two oblique blades 1 and one straight blade 2 detachably connected to the support frame 3. The straight blade 2 is located between the two oblique blades 1, and the two oblique blades 1 are symmetrically arranged about the straight blade 2. The oblique blade 1 includes a handle arranged parallel to the straight blade 2, a blade head bent to the side, and a transition section connecting the blade head and the handle.

[0033] The blade tip bends away from the straight blade 2. The straight blade 2 and the handle have through holes for the bolt 4 to pass through. The bolt 4 is threaded onto the support frame 3. There is a gap between the straight blade 2 and the handle, so the straight blade 2 and the handle rotate on the bolt 4, thus having a retraction characteristic, effectively preventing hard objects from damaging the equipment and reducing the risk of flying fragments.

[0034] The angle between the handle and the blade is 45-50°.

[0035] The blade 5 of the cutter head includes a conical first cutting edge, a second cutting edge 203 located to the left of the first cutting edge and inclined upward from left to right, and a third cutting edge located to the right of the first cutting edge and inclined upward from right to left and located below the second cutting edge. The inclination angle of the third cutting edge 201 is greater than that of the second cutting edge. Both the third cutting edge 201 and the second cutting edge are serrated. The height and span of the serrations of the third cutting edge 201 are smaller than those of the serrations of the second cutting edge. The height of the serration refers to the distance between the vertex of the serration and the bottom edge, and the span of the serration refers to the length of the bottom edge of the serration.

[0036] The second cutting edge of the blade is close to the transition section, and during use, the second cutting edge is located between the first cutting edge and the transition section.

[0037] The second cutting edge is located between the first cutting edge and the pivot 7, see attached. Figure 5 The first cutting edge is the gh segment, the second cutting edge is the hi segment, and the third cutting edge is the ef segment. The length of the first cutting edge is 0.15-0.2 times the length of the cutting edge, the length of the second cutting edge is 0.5-0.6 times the length of the cutting edge, and the length of the third cutting edge 201 is 0.05-0.15 times the length of the cutting edge. The hi segment is made of high-speed tool steel, and the eh segment is made of alloy tool steel.

[0038] The equation for the third cutting edge, i.e., segment ef, is:

[0039] in: .

[0040] The hypotenuse connecting the first and third cutting edges, which is the gh segment, has the following equation:

[0041] in: .

[0042] The curve equation of the second cutting edge, i.e. the curve equation of hi, is fitted into a sawtooth wave equation.

[0043] In use, the rotating shaft drives the cutting blade assembly to rotate. When the oblique blade rotates, the first cutting edge cuts first, followed by the second cutting edge, and finally the third cutting edge. The geometric curve of the blade is biomimetic to the teeth of a sixgill shark, which simulates the sixgill shark biting its prey when the rotating shaft rotates at high speed. This allows the blade to easily cut weeds and improve the efficiency of orchard pruning. The retraction characteristics of the straight and oblique blades allow the blade to retract when it encounters hard objects, greatly reducing the wear and tear on the blade.

[0044] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A biomimetic three-clawed blade for an orchard lawnmower based on the teeth of a sixgill shark, characterized in that: The cutter assembly (6) is mounted on a rotating shaft (7). The cutter assembly (6) includes a slanted blade (1) bent to one side. The blade (5) of the slanted blade (1) includes a conical first blade (202), a second blade (203) located to the left of the first blade and inclined upward from left to right, and a third blade (201) located to the right of the first blade and inclined upward from right to left and located below the second blade. The inclination angle of the third blade (201) is greater than that of the second blade. Both the third blade (201) and the second blade are serrated. The height and span of the serrations of the third blade (201) are smaller than those of the second blade.

2. The orchard lawnmower bionic three-clawed blade based on sixgill shark teeth as described in claim 1, characterized in that: The curve fitting of the second cutting edge is a sawtooth wave equation.

3. The orchard lawnmower bionic three-clawed blade based on sixgill shark teeth as described in claim 1, characterized in that: The cutting blade assembly (6) includes a support frame (3) and two oblique blades (1) and one straight blade (2) detachably connected to the support frame (3). The straight blade (2) is located between the two oblique blades (1) and the two oblique blades (1) are symmetrically arranged about the straight blade (2). The oblique blades (1) bend away from the straight blade (2).

4. The orchard lawnmower bionic three-clawed blade based on sixgill shark teeth according to claim 3, characterized in that: The angle between the straight cutter (2) and the oblique cutter (1) is 45-50°.

5. The orchard lawnmower bionic three-clawed blade based on sixgill shark teeth according to claim 3, characterized in that: A number of cutter groups (6) are uniformly arranged on the rotating shaft (7) along the circumference to form a cutter unit. The cutter units are arranged on the rotating shaft (7) along the axial direction. The cutter groups (6) between two adjacent cutter units are staggered in the axial direction. The axis of the rotating shaft (7) extends laterally or longitudinally.

6. The orchard lawnmower bionic three-clawed blade based on sixgill shark teeth according to claim 3, characterized in that: The length of the first cutting edge is 0.15-0.2 times the blade length, the length of the second cutting edge is 0.5-0.6 times the blade length, and the length of the third cutting edge (201) is 0.05-0.15 times the blade length.

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