Bionic chopping outer cutter surface with micro-nano structure on tooth crown surface

Abstract

The invention relates to a bionic chopping outer cutter face of a tooth crown face micro-nano structure, and belongs to the technical field of agricultural mechanical cutter design. The tool comprises a tool bit, a tool body and a locking sleeve. The tool bit comprises a tooth crown surface, cutting particles, a blade surface bulge, a mounting sliding block, a locking hole and a main cutting blade; the cutter body comprises a mounting sliding groove, a connecting sliding rail, a near-cutter-holder curved surface and a far-cutter-holder curved surface. The locking sleeve comprises an arc-shaped hole and a locking through hole. The tooth crown surface is obtained by simulating the inferior tooth incisor tooth curve of the civets in the natural world; the cutting particles are obtained by combining natural honeycombs with the incisor microstructure of the masked civets in a bionic manner, and are tightly arranged on the tooth crown surface; the blade surface bulges are distributed on the tooth crown surfaces and are inserted among the cutting particles; the mounting sliding block and the mounting sliding groove are matched to complete disassembly and assembly of the tool bit and the tool body, and the connecting sliding rail and the arc-shaped hole assist in fixing of the locking sleeve. Compared with a common agricultural chopping knife, the chopping efficiency is improved, the abrasion of the knife is reduced, and the service life is prolonged. Meanwhile, the detachable structure can solve the problem that an existing shredding device is frequent and complex in cutter replacement.

Description

Technical Field

[0001] This invention relates to a biomimetic cutting outer surface with a micro-nano structure on the crown surface, belonging to the field of agricultural machinery cutting tool design technology. Background Technology

[0002] With the large-scale development of animal husbandry, higher demands are placed on the operational flexibility and ease of maintenance of forage harvesters. Furthermore, the cutting performance of the shredder directly affects the palatability and utilization rate of the forage. Currently, shredders on the market generally suffer from several problems: such as insufficient material chopping, easily forming large lumps, leading to decreased animal digestibility and absorption; and inconvenient installation and adjustment. Most shredder blades use a fixed bolt connection between the blade head and the blade body, making disassembly and assembly cumbersome and time-consuming when the blade head is worn significantly or when different blade sizes need to be replaced depending on the type of forage. Therefore, shredders have a very broad prospect in the field of agricultural machinery.

[0003] Based on the above background, this invention designs a detachable shredder with a biomimetic micro / nano structure on its tooth crown surface for assisted cutting. This design draws inspiration from the compact hexagonal structure of a bee's hive and the microscopic structure of a beaver's incisors, and incorporates Chinese mortise and tenon joinery to improve the existing shredder's tooth crown surface and blade structure. This enhances the shredder's ability to shred materials and reduces the complexity of replacing and disassembling the blade, thereby improving the working efficiency of forage harvesters and providing a new technological path and innovative ideas for future agricultural harvesting machinery. Summary of the Invention

[0004] The main technical problem this invention aims to solve is to overcome the shortcomings of the prior art, specifically by providing a biomimetic shredding outer blade with a micro / nano-structured tooth crown. The cutting particles and protrusions on the tooth crown of this blade can further shred the material laterally and longitudinally after the initial cutting by the cutting edge. This not only reduces cutting resistance and improves shredding efficiency, saving energy, but also reduces material particle size and accelerates animal digestion. Furthermore, the installation and disassembly of this invention are simple and convenient, facilitating blade maintenance and replacement, and allowing for easy adjustment of the gap between the moving and fixed blades. This effectively simplifies the complex disassembly and assembly process after blade wear or when dealing with different cutting length requirements, saving time and labor costs.

[0005] The technical solution of this invention is: a micro-nano structured biomimetic cutting outer blade surface, including a blade head 1, a blade body 2, and a locking sleeve 3;

[0006] The cutter head 1 includes a crown surface 1-1, cutting particles 1-2, a cutting edge protrusion 1-3, a mounting slider 1-4, a locking hole 1-5, and a main cutting edge 1-6; the cutter body 2 includes a mounting groove 2-1, a connecting slide rail 2-2, a near-tool holder curved surface 2-3, and a far-tool holder curved surface 2-4; the locking sleeve 3 includes an arc-shaped hole 3-1 and a locking through hole 3-2.

[0007] The main cutting edge 1-6 and the far tool holder curved surface 2-4 are arranged from front to back as follows: tooth crown surface 1-1, cutting particles 1-2, cutting edge protrusion 1-3, mounting slider 1-4, locking hole 1-5, mounting slide groove 2-1, connecting slide rail 2-2, arc-shaped hole 3-1, locking through hole 3-2, and near tool holder curved surface 2-3;

[0008] The tooth crown surface 1-1, cutting particles 1-2, cutting edge protrusion 1-3, and main cutting edge 1-6 together constitute the cutting part, which performs rapid cutting and deep shredding of materials to meet the requirements of fine and uniform feed processing. The mounting slider 1-4, locking hole 1-5, mounting groove 2-1, connecting slide rail 2-2, arc hole 3-1, and locking through hole 3-2 together constitute the locking part, which uses the locking sleeve 3 and the structural features of the cutter head 1 and cutter body 2 to realize the disassembly and assembly of the cutter, giving the cutter a detachable characteristic, which facilitates later maintenance and replacement operations. The near-tool holder curved surface 2-3 and the far-tool holder curved surface 2-4 together constitute the mounting part, which is tightly fitted to the cutter holder 4 and cutter mounting plate 5 by three parallel bolts to achieve reliable positioning and installation.

[0009] As a further embodiment of the present invention, the cutting particles 1-2 include a hexagonal stepped structure 1-2-1, an acute-angled cutting edge 1-2-2, and a back ridge cutting edge 1-2-3; the cutting surface protrusion 1-3 includes a sharp cutting end 1-3-1 and two irregular curved surfaces: a left curved surface 1-3-2 and a right curved surface 1-3-3.

[0010] The crown surface 1-1 is biomimetic to the curve of the lower incisor of a beaver in nature. The cutting particles 1-2 and the cutting edge protrusions 1-3 are fixedly connected to the outer surface of the crown surface 1-1. The cutting particles 1-2 are biomimetic to the microstructure of a honeycomb and a beaver incisor. The six sides of the bottom hexagon are closely fitted with the sides of the adjacent particles, forming a compact and uniformly stressed array of cutting units. The cutting edge protrusions 1-3 are generally shaped along the arc of the main cutting edge 1-6. The blades are arranged in an equidistant array to ensure that the sharp edges 1-3-1 of all the protruding blades 1-3 are coplanar on the same cutting arc surface and are evenly interspersed in the dense array of cutting particles 1-2. The left curved surface 1-3-2 is tangent to the right side, right front side, and right rear sidewall of the left cutting particle 1-2, and the right curved surface 1-3-3 is tangent to the left side, left front side, and left rear sidewall of the right cutting particle 1-2. The back of the cutting edge of the main cutting blade 1-6 is fixedly connected to the front edge of the crown surface 1-1.

[0011] The mounting slider 1-4 is located on the rear side of the cutter head 1. The outer wall of the mounting track, which consists of four segments—a straight line, a trapezoidal boss, a straight line, and an arc—fits against the inner wall of the mounting groove 2-1 at the front end of the cutter body 2. The cutter head 1 and the cutter body 2 are detached and assembled through a sliding connection. The locking holes 1-5 are located on the left and right side walls of the mounting slider 1-4 and are bolted to the locking through holes 3-2 located on the side walls of the locking sleeve 3 to prevent the cutter head 1 and the cutter body 2 from moving laterally. The connecting slide rail 2-2 is located on the back of the cutter body 2, starting from the outer side of the mounting groove 2-1 and ending at the curved surface 2-3 near the cutter seat. It slides with the arc-shaped hole 3-1 that penetrates the front and rear end faces of the locking sleeve 3 to restrict the sliding trajectory of the locking sleeve 3 and assist in the lateral fixation of the cutter head 1 and the cutter body 2.

[0012] The near-blade holder curved surface 2-3 is located at the rear end of the blade body 2, and the far-blade holder curved surface 2-4 is located below the near-blade holder curved surface 2-3. Both of them are smoothly connected to the outer side of the mounting groove 2-1, and the left and right sides are flush with the two sides of the blade head 1, so that the blade is curved as a whole, which effectively reduces material slippage during the chopping process, reduces cutting resistance, and improves chopping quality.

[0013] The locking sleeve 3 is installed to the tool body via the near tool holder curved surface 2-3 and the far tool holder curved surface 2-4. The auxiliary locking sleeve 3 is fixed to the outside of the tool body 2 by fitting the connecting slide rail 2-2 and the arc-shaped hole 3-1.

[0014] The cutting particles 1-2 are closely arranged on the outer surface of the crown surface 1-1. The bottom surface of the hexagonal stepped structure 1-2-1 is fixedly attached to the crown surface 1-1. Each layer has an acute-angled cutting edge 1-2-2, which extends along the edge of the hexagonal stepped structure 1-2-1. The back ridge blade 1-2-3 stands vertically on the top layer of the cutting particles 1-2, with the blade surface parallel to the material flow direction. The size of the nine blades decreases from the center line of the hexagon to the two sides. The largest blade is located on the center line of the hexagon, and the remaining blades are symmetrically distributed along the center line.

[0015] The sharp cutting edge 1-3-1 is located at the leading edge of the blade protrusion 1-3. The two sides of the blade protrusion 1-3 are irregular curved surfaces, namely the left curved surface 1-3-2 and the right curved surface 1-3-3.

[0016] As a further aspect of the present invention, the crown surface 1-1 draws inspiration from the natural arc-shaped contour of the beaver's mandibular incisor, and the crown surface is basically fitted to the arc of the beaver's incisor cusp, in the spatial rectangular coordinate system O. In xyz, with the midpoint of the leading edge of the crown surface 1-1 as the origin O, the x-axis is forward, the y-axis is to the right, and the z-axis is upward. The mathematical expression of its cutting edge curve on the plane xOz is as follows:

[0017] .

[0018] As a further aspect of the present invention, the cutting particles 1-2 adopt a four-layer stepped hexagonal cutting structure:

[0019] The cutting particles 1-2 are arranged with the material feeding direction as the negative x-axis and the perpendicular y-axis as the feeding direction. Each layer is distributed in a gradually decreasing manner along the negative x-axis, that is, the size decreases from bottom to top, forming a hexagonal stepped structure 1-2-1. This structure draws on the characteristics of the close arrangement of hexagons in the honeycomb of bees in nature, making the most of space and ensuring the stability of the particle structure.

[0020] The material contact edges of the cutting particles 1-2 from the bottom to the third layer are all provided with acute-angle cutting edges 1-2-2, with a cutting edge angle of 30°, which facilitates stress concentration. Combined with the squeezing and shearing action provided by the rapid rotation of the cutter roller during the cutting process, it induces the generation of transverse initial cracks parallel to the direction of the material stem.

[0021] The cutting particles 1-2 have nine back ridge blades 1-2-3 symmetrically distributed along the x-axis, with the blade direction parallel to the x-axis. The size of the main cutting edge decreases along both positive and negative sides of the y-axis. The overall back ridge blade spatial arrangement is approximately arched, which can directionally expand and break the initial crack.

[0022] The acute-angle cutting edge 1-2-2 and the back blade 1-2-3 of the cutting particles 1-2 mimic the uneven and angular microstructure of beaver incisors, giving the crown surface of the shredder teeth high-efficiency cutting characteristics. This helps to achieve progressive fine shredding of feed and effectively solves the problems of high material size and insufficient fineness of existing shredders. At the same time, it improves the structural strength and cutting efficiency of the blade.

[0023] The hexagonal stepped structure 1-2-1 provides a stable structural framework through its honeycomb arrangement and also serves as a basic carrier for the acute-angle cutting edges 1-2-2 and the back ridge blades 1-2-3, adapting to their spatial arrangement. During the cutting process, the material first contacts the acute-angle cutting edges 1-2-2 of the first three layers, using the sharp angle characteristics and the squeezing and shearing action to create initial transverse cracks, providing a cutting starting point for subsequent crack propagation. The material with initial cracks continues to be fed to the top layer, where the nine back ridge blades 1-2-3 receive the cracked area and, through the cutting action of the blades, propagate the initial cracks along the fracture direction, or even completely split them. The overall feature achieves fine crushing of the material through the smooth connection between the initial crack creation and the subsequent crack propagation, ultimately solving the problem of insufficient crushing degree in traditional structures.

[0024] As a further aspect of the present invention, the blade protrusions 1-3 adopt a streamlined profile, and the protrusions are arranged at intervals along the length direction of the tooth crown surface. Each protrusion has a sharp blade tip 1-3-1 at its front end, which forms concentrated stress on the material and generates transverse initial cracks.

[0025] The smooth curved surfaces on both sides of the protrusions 1-3 utilize the "streamlined drag reduction" characteristic in fluid mechanics to guide the material along the protrusion contour towards the blade body. Simultaneously, through the combined effects of compression and shearing of the curved surfaces, the already generated transverse cracks are further expanded and penetrated. In the spatial rectangular coordinate system O... In xyz, the mathematical expression of the left curved surface 1-3-2 on the projection plane xOy is: x 13.370039 0.118766]; The mathematical expression of the right-side curved surface 1-3-3 on the projection plane xOy is: x 13.362826, 0.085890];

[0026] The sharp cutting edge 1-3-1 of the protruding blade 1-3 and the curved edges on both sides complete the coordinated cutting of "crack creation and crack expansion", ultimately achieving fine crushing of materials.

[0027] As a further aspect of the present invention, the opening angle of the main cutting edges 1-6 is set to 30°-32°, which matches the actual cutting edge angle of the beaver incisor, thus forming an optimal stress concentration effect. During cutting, the initial cutting crack is first generated through the acute-angled cutting edge, and then the crack is further expanded by the beaver incisor-type arc-shaped surface, thereby achieving efficient cutting of the material.

[0028] As a further embodiment of the present invention, the mounting slider 1-4, the mounting groove 2-1, the connecting slide rail 2-2, and the locking sleeve 3 together form a mortise and tenon quick-release locking structure:

[0029] The cutter head 1 has a circular mounting slider 1-4 on its rear side. This slider and the corresponding mounting groove 2-1 on the cutter body 2 form a mortise and tenon sliding fit. The contour of the mounting groove 2-1 is precisely matched with the shape of the mounting slider 1-4, which not only guides the mounting slider 1-4 to slide along the mounting groove 2-1 in a directional manner to avoid misalignment during assembly, but also bears the radial cutting load of the shredder during operation through the surface contact between the mounting slider 1-4 and the mounting groove 2-1, reducing local stress concentration.

[0030] Two connecting slide rails 2-2 are provided on the outer side of the mounting slide groove 2-1. Their arched contours are adapted to the arc-shaped holes 3-1 opened at the corresponding positions of the locking sleeve 3, and the two form a fitting sliding pair. When disassembling the cutter head, the arc-shaped holes 3-1 slide along the arched slide rails, constraining the locking sleeve 3 to always move smoothly in a straight line, eliminating the problem of trajectory deviation caused by sliding during the disassembly and assembly of the locking sleeve 3, and at the same time making the force of the locking sleeve 3 evenly transmitted along the curved surface of the slide rail, avoiding local wear.

[0031] Locking holes 1-5 and locking through holes 3-2 are provided on both sides of the cutting head 1 and the locking sleeve 3. After the mounting slider 1-4 slides along the mounting groove 2-1 to the assembly station and the locking sleeve 3 reaches the locking position, the transverse fastening is achieved by threaded connection to prevent the cutting head 1 from moving axially along the mounting groove 2-1, which effectively improves the reliability of the connection.

[0032] As a further aspect of the present invention, the tail of the tool body 2 is composed of a near-tool holder curved surface 2-3 and a far-tool holder curved surface 2-4, which match the contour of the tool holder and the contour of the tool mounting plate. This enables reliable positioning of the tool body and the tool holder, further improving the stability of the installation. Simultaneously, the arc-shaped curved profile disperses the cutting reaction force during operation, avoiding stress concentration at the tail and improving the structural durability of the tool body 2. In the spatial rectangular coordinate system O-xyz, the mathematical expression of the near-tool holder curved surface 2-3 on the projection plane xOz is:

[0033] ;

[0034] The mathematical expression for the far-end surface 2-4 on the projection plane xOz is:

[0035] .

[0036] The biomimetic shredding outer blade with micro-nano structure on the crown surface provided by this invention has the following advantages compared with existing shredding blades:

[0037] (1) The natural arc-shaped profile of the crown surface 1-1 described in this invention, combined with the opening angle of the main cutting edge of 30°-32°, can form an optimal stress concentration effect, making it easier to generate and expand cutting cracks during cutting, thus achieving efficient cutting of materials.

[0038] (2) The cutting particles described in this invention, through a four-layer hexagonal stepped structure, acute-angle cutting edges and back ridge cutting edge, can maximize the use of space and induce transverse cracks to generate and expand, thereby improving the structural strength and cutting efficiency of the cutting head.

[0039] (3) The blade protrusion described in this invention reduces material flow resistance and reduces the risk of blockage through the high-efficiency cracking ability of the tip and the streamlined cracking characteristics of the curved edge. At the same time, it realizes the fine chopping of feed and effectively improves the uniformity and palatability of the material.

[0040] (4) The mortise and tenon quick-installation locking structure composed of the mounting slider, mounting groove, connecting slide rail and locking sleeve described in this invention simplifies the disassembly and assembly of the shredder, reduces the skill requirements of the operator, and saves more than 80% of maintenance time compared with the traditional structure. It solves the defects of the existing shredder disassembly and assembly being cumbersome and the maintenance efficiency being low, and greatly improves the maintenance efficiency of the equipment.

[0041] (5) The mortise and tenon quick-release locking structure composed of the mounting slider, mounting groove, connecting rail and locking sleeve described in this invention can replace different blades according to different feed chopping length requirements, without disassembling the blade body, and is quick to assemble and disassemble, adapting to a variety of operating modes.

[0042] (6) The mounting slider and mounting groove, the connecting slide rail and the arc hole of the present invention all adopt the surface contact force method, which avoids the problem of local stress concentration in the structure, evenly disperses the cutting load, reduces component wear, and extends the overall service life of the tool.

[0043] (7) The mortise and tenon quick-installation locking structure composed of the mounting slider, mounting groove, connecting rail and locking sleeve described in this invention ensures stability during operation through a dual fixing mechanism of locking and threaded connection, achieving a unity of ease of disassembly and assembly, structural durability and connection stability, and is suitable for the high-efficiency operation requirements of large-scale forage harvesting. Attached Figure Description

[0044] Figure 1 This is an overall schematic diagram of the biomimetic cutting outer blade surface of the micro-nano structure of the tooth crown surface of the present invention;

[0045] Figure 2 This is a schematic diagram of the cutting head of the present invention;

[0046] Figure 3 This is a schematic diagram of the arrangement of cutting particles and protrusions on the cutting edge in this invention;

[0047] Figure 4 This is a schematic diagram of the cutting particles of the present invention;

[0048] Figure 5 This is a schematic diagram of the blade body of the present invention;

[0049] Figure 6 This is a schematic diagram of the locking sleeve of the present invention;

[0050] Figure 7 This is a schematic diagram of the overall installation of the present invention.

[0051] Figure 1-7 The following are the labels: 1-cutter head, 2-cutter body, 3-locking sleeve, 4-tool holder, 5-tool mounting plate, 1-1-tooth crown surface, 1-2-cutting particles, 1-3-edge protrusion, 1-4-mounting slider, 1-5-locking hole, 1-6-main cutting edge, 2-1-mounting groove, 2-2-connecting slide rail, 2-3-near tool holder curved surface, 2-4-far tool holder curved surface, 3-1-arc hole, 3-2-locking through hole, 1-2-1-hexagonal stepped structure, 1-2-2-acute angled cutting edge, 1-2-3-back spine cutting edge, 1-3-1-sharp cutting edge, 1-3-2-left side curved surface, 1-3-3-right side curved surface. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0053] See Figure 1-7 The present invention provides a micro-nano structured biomimetic cutting outer blade for tooth crowns;

[0054] See Figure 1 The embodiments of the present invention include a blade head 1, a blade body 2, and a locking sleeve 3;

[0055] The cutter head 1 includes a crown surface 1-1, cutting particles 1-2, a cutting edge protrusion 1-3, a mounting slider 1-4, a locking hole 1-5, and a main cutting edge 1-6; the cutter body 2 includes a mounting groove 2-1, a connecting slide rail 2-2, a near-tool holder curved surface 2-3, and a far-tool holder curved surface 2-4; the locking sleeve 3 includes an arc-shaped hole 3-1 and a locking through hole 3-2.

[0056] As a further embodiment of the present invention, such as Figure 1 As shown, the tooth crown surface 1-1, cutting particles 1-2, cutting edge protrusion 1-3, and main cutting edge 1-6 together constitute the cutting part, which performs rapid cutting and deep shredding of materials to meet the requirements of fine and uniform feed processing; the mounting slider 1-4, locking hole 1-5, mounting groove 2-1, connecting slide rail 2-2, arc hole 3-1, and locking through hole 3-2 together constitute the locking part, which uses the locking sleeve 3 and the structural features of the cutter head 1 and cutter body 2 to realize the disassembly and assembly of the cutter, giving the cutter a detachable characteristic, which facilitates later maintenance and replacement operations; the near-tool holder curved surface 2-3 and the far-tool holder curved surface 2-4 together constitute the mounting part, which is tightly fitted to the cutter holder 4 and cutter mounting plate 5 by three parallel bolts to achieve reliable positioning and installation.

[0057] As a further embodiment of the present invention, such as Figure 1 As shown, from front to back, the main cutting edge 1-6 and the far tool holder curved surface 2-4 are: tooth crown surface 1-1, cutting particles 1-2, cutting edge protrusion 1-3, mounting slider 1-4, locking hole 1-5, mounting groove 2-1, connecting slide rail 2-2, arc-shaped hole 3-1, locking through hole 3-2, and near tool holder curved surface 2-3.

[0058] See Figure 2The crown surface 1-1 is biomimetic to the curve of the lower incisor of a beaver in nature. The cutting particles 1-2 and the cutting edge protrusions 1-3 are fixedly connected to the outer surface of the crown surface 1-1. The mounting slider 1-4 is located on the rear side of the cutter head 1. The outer wall of the mounting track, which consists of four segments: a straight line, a trapezoidal boss, a straight line, and an arc, fits against the inner wall of the mounting groove 2-1 at the front end of the cutter body 2. The cutter head 1 and the cutter body 2 are detached and assembled through a sliding connection. The locking holes 1-5 are located on the left and right side walls of the mounting slider 1-4 and are connected to the locking through holes 3-2 located on the side walls of the locking sleeve 3 by bolts to prevent the cutter head 1 and the cutter body 2 from moving laterally.

[0059] As a further embodiment of the present invention, such as Figure 2 As shown, the crown surface 1-1 is based on the natural arc-shaped contour of the beaver's mandibular incisor, and the crown surface is basically fitted with the arc of the beaver's incisor cusp. In the spatial rectangular coordinate system O In xyz, with the midpoint of the leading edge of the crown surface 1-1 as the origin O, the x-axis is forward, the y-axis is to the right, and the z-axis is upward. The mathematical expression of its cutting edge curve on the plane xOz is as follows:

[0060] .

[0061] The back of the cutting edge of the main cutting edge 1-6 is fixedly connected to the front edge of the crown surface 1-1, and the opening angle is set to 30°-32°. Matching the actual cutting edge angle of the beaver incisor, it can form an optimal stress concentration effect. During cutting, the initial cutting crack is first generated through the acute-angle cutting edge, and then the crack is further expanded by the arc-shaped curved surface of the beaver incisor, so as to achieve efficient cutting of the material.

[0062] See Figure 3 As a detailed enlarged view of the blade head 1 of the present invention, the blade protrusion 1-3 includes a sharp blade tip 1-3-1 and two irregular curved surfaces: a left curved surface 1-3-2 and a right curved surface 1-3-3; the sharp blade tip 1-3-1 is located at the leading edge of the blade protrusion 1-3, and the two sides of the blade protrusion 1-3 are irregular curved surfaces, namely the left curved surface 1-3-2 and the right curved surface 1-3-3.

[0063] As a further embodiment of the present invention, such as Figure 3As shown, the cutting particles 1-2 are biomimetic to the microstructure of honeycombs and beaver incisors in nature. The six sides of the bottom hexagon are closely attached to the sides of the adjacent particles, forming a compact and uniformly stressed array of cutting units. The blade protrusions 1-3 are arranged in an equidistant array along the arc of the main cutting edge 1-6, ensuring that the sharp blade ends 1-3-1 of all blade protrusions 1-3 are coplanar on the same cutting arc surface and are evenly interspersed in the dense array of cutting particles 1-2. The left curved surface 1-3-2 is tangent to the right, right front, and right rear sidewalls of the left cutting particle 1-2, and the right curved surface 1-3-3 is tangent to the left, left front, and left rear sidewalls of the right cutting particle 1-2.

[0064] As a further embodiment of the present invention, such as Figure 3 As shown, the blade protrusions 1-3 have a streamlined profile and are arranged at intervals along the length of the tooth crown surface. Each protrusion has a sharp blade tip 1-3-1 at its front end, which forms concentrated stress on the material and generates transverse initial cracks.

[0065] The smooth curved surfaces on both sides of the protrusions 1-3 utilize the "streamlined drag reduction" characteristic in fluid mechanics to guide the material along the protrusion contour towards the blade body. Simultaneously, through the combined effects of compression and shearing of the curved surfaces, the already generated transverse cracks are further expanded and penetrated. In the spatial rectangular coordinate system O... In xyz, the mathematical expression of the left curved surface 1-3-2 on the projection plane xOy is: x 13.370039 0.118766]; The mathematical expression of the right-side curved surface 1-3-3 on the projection plane xOy is: x 13.362826, 0.085890];

[0066] The sharp cutting edge 1-3-1 of the protruding blade 1-3 and the curved edges on both sides complete the coordinated cutting of "crack creation and crack expansion", ultimately achieving fine crushing of materials.

[0067] See Figure 4 The cutting particles 1-2 are biomimetic to the microstructure of honeycomb and beaver incisors in nature, which can improve the wear resistance and cutting efficiency of the tool. Specifically, they include a hexagonal stepped structure 1-2-1, an acute-angled cutting edge 1-2-2, and a back ridge cutting edge 1-2-3.

[0068] The cutting particles 1-2 are closely arranged on the outer surface of the crown surface 1-1. The bottom surface of the hexagonal stepped structure 1-2-1 is fixedly attached to the crown surface 1-1. Each layer has an acute-angled cutting edge 1-2-2, which extends along the edge of the hexagonal stepped structure 1-2-1. The back ridge blade 1-2-3 stands vertically on the top layer of the cutting particles 1-2, with the blade surface parallel to the material flow direction. The size of the nine blades decreases from the center line of the hexagon to the two sides. The largest blade is located on the center line of the hexagon, and the remaining blades are symmetrically distributed along the center line.

[0069] As a further embodiment of the present invention, such as Figure 4 As shown, the cutting particles 1-2 adopt a four-layer stepped hexagonal cutting structure:

[0070] The cutting particles 1-2 are arranged with the material feeding direction as the negative x-axis and the perpendicular y-axis as the feeding direction. Each layer is distributed in a gradually decreasing manner along the negative x-axis, that is, the size decreases from bottom to top, forming a hexagonal stepped structure 1-2-1. This structure draws on the characteristics of the close arrangement of hexagons in the honeycomb of bees in nature, making the most of space and ensuring the stability of the particle structure.

[0071] The material contact edges of the cutting particles 1-2 from the bottom to the third layer are all provided with acute-angle cutting edges 1-2-2, with a cutting edge angle of 30°, which facilitates stress concentration. Combined with the squeezing and shearing action provided by the rapid rotation of the cutter roller during the cutting process, it induces the generation of transverse initial cracks parallel to the direction of the material stem.

[0072] The cutting particles 1-2 have nine back ridge blades 1-2-3 symmetrically distributed along the x-axis, with the blade direction parallel to the x-axis. The size of the main cutting edge decreases along both positive and negative sides of the y-axis. The overall back ridge blade spatial arrangement is approximately arched, which can directionally expand and break the initial crack.

[0073] The acute-angle cutting edge 1-2-2 and the back blade 1-2-3 of the cutting particles 1-2 mimic the uneven and angular microstructure of beaver incisors, giving the crown surface of the shredder teeth high-efficiency cutting characteristics. This helps to achieve progressive fine shredding of feed and effectively solves the problems of high material size and insufficient fineness of existing shredders. At the same time, it improves the structural strength and cutting efficiency of the blade.

[0074] The hexagonal stepped structure 1-2-1 provides a stable structural framework through its honeycomb arrangement and also serves as a basic carrier for the acute-angle cutting edges 1-2-2 and the back-ridge cutting edges 1-2-3, adapting to their spatial layout. During the cutting process, the material first contacts the acute-angle cutting edges 1-2-2 of the first three layers. Utilizing the characteristics of the sharp angles and the squeezing and shearing action, initial transverse cracks are created, providing a cutting starting point for subsequent crack propagation. The material with the initial cracks continues to be fed to the top layer, where the nine back-ridge cutting edges 1-2-3 receive the cracked area. Through the cutting action of the blades, the initial cracks are propagated along the fracture direction, or even completely split. The overall feature achieves fine crushing of the material through the smooth connection between the initial crack creation and the subsequent crack propagation, ultimately solving the problem of insufficient chopping power in traditional structures.

[0075] See Figure 5 The cutter body 2 includes a mounting groove 2-1, a connecting slide rail 2-2, a near-tool holder curved surface 2-3, and a far-tool holder curved surface 2-4;

[0076] The connecting slide rail 2-2 is located on the back of the blade body 2, starting from the outside of the mounting groove 2-1 and ending at the near-blade holder curved surface 2-3. It slides in cooperation with the arc-shaped hole 3-1 that passes through the front and rear end faces of the locking sleeve 3, restricting the sliding trajectory of the locking sleeve 3 and assisting in the lateral fixation of the blade head 1 and the blade body 2. The near-blade holder curved surface 2-3 is located at the rear end of the blade body 2, and the far-blade holder curved surface 2-4 is located below the near-blade holder curved surface 2-3. Both of them are smoothly connected to the outer side of the mounting groove 2-1, and the left and right sides are flush with the two sides of the blade head 1, making the blade as a whole curved, effectively reducing material slippage during the chopping process, reducing cutting resistance, and improving chopping quality.

[0077] See Figure 6 The locking sleeve 3 includes an arc-shaped hole 3-1 and a locking through hole 3-2; the locking sleeve 3 is installed to the tool body via the near tool holder curved surface 2-3 and the far tool holder curved surface 2-4, and the connecting slide rail 2-2 fits into the arc-shaped hole 3-1 to install the auxiliary locking sleeve 3 and fix it to the outside of the tool body 2.

[0078] As a further aspect of the present invention, comprehensive Figure 2 , Figure 5 and Figure 6 The mounting slider 1-4, mounting groove 2-1, connecting slide rail 2-2, and locking sleeve 3 work together to form a mortise and tenon quick-installation locking structure: the mounting slider 1-4 and the mounting groove 2-1 cooperate to complete the disassembly and assembly of the cutter head 1 and the cutter body 2, and the connecting slide rail 2-2 and the arc-shaped hole 3-1 assist the locking sleeve 3 in fixing;

[0079] As a further aspect of the present invention, comprehensive Figure 2 , Figure 5 and Figure 6The cutter head 1 has a circular mounting slider 1-4 on its rear side. This slider and the corresponding mounting groove 2-1 on the cutter body 2 form a mortise and tenon sliding fit. The contour of the mounting groove 2-1 is precisely matched with the shape of the mounting slider 1-4, which not only guides the mounting slider 1-4 to slide along the mounting groove 2-1 in a directional manner to avoid misalignment during assembly, but also bears the radial cutting load of the shredder during operation through the surface contact between the mounting slider 1-4 and the mounting groove 2-1, reducing local stress concentration.

[0080] Two connecting slide rails 2-2 are provided on the outer side of the mounting slide groove 2-1. Their arched contours are adapted to the arc-shaped holes 3-1 opened at the corresponding positions of the locking sleeve 3, forming a fitted sliding pair. When disassembling the cutter head, the arc-shaped holes 3-1 slide along the arched slide rails, constraining the locking sleeve 3 to always move smoothly in a straight line, eliminating the problem of trajectory deviation caused by sliding during the disassembly and assembly of the locking sleeve 3. At the same time, it makes the force of the locking sleeve 3 evenly transmitted along the curved surface of the slide rail, avoiding local wear.

[0081] Locking holes 1-5 and locking through holes 3-2 are provided on both sides of the cutting head 1 and the locking sleeve 3. After the mounting slider 1-4 slides along the mounting groove 2-1 to the assembly station and the locking sleeve 3 reaches the locking position, the transverse fastening is achieved by threaded connection to prevent the cutting head 1 from moving axially along the mounting groove 2-1, which effectively improves the reliability of the connection.

[0082] The tail of the tool body 2 is mainly composed of a near-tool holder curved surface 2-3 and a far-tool holder curved surface 2-4, which match the contours of the tool holder and the tool mounting plate. This allows for reliable positioning of the tool body and the tool holder, further improving installation stability. Simultaneously, the arc-shaped curved profile disperses the cutting reaction force during operation, preventing stress concentration at the tail and enhancing the structural durability of the tool body 2. In the spatial rectangular coordinate system O-xyz, the mathematical expression of the near-tool holder curved surface 2-3 on the projection plane xOz is:

[0083] ;

[0084] The mathematical expression for the far-end surface 2-4 on the projection plane xOz is:

[0085] .

[0086] See Figure 7 24 shredding blades are installed on the blade holder 4 and fixed by the blade mounting plate 5, arranged symmetrically in a herringbone pattern on the blade roller.

[0087] The working principle of this invention is as follows:

[0088] This invention specifically relates to a biomimetic micro-nano structured cutting blade with a tooth crown. In its specific structure, cutting particles and edge protrusions are attached to the tooth crown. The tooth crown is biomimetic to the curve of a beaver's mandibular incisor; the cutting particles, biomimetic to the microstructure of a honeycomb and beaver incisors, are densely arranged on the tooth crown; the edge protrusions are distributed on the tooth crown and interspersed among the cutting particles. The cutting particles and edge protrusions induce and expand transverse cracks, assisting the main cutting edge in cutting the material, thus improving the structural strength and cutting efficiency of the blade. Furthermore, a mounting slider and mounting groove cooperate to complete the assembly and disassembly of the blade head and body, with connecting rails and arc-shaped holes assisting in locking the blade. The detachable function of the blade head and body simplifies the assembly and disassembly of the cutting blade, significantly improving the maintenance efficiency of the equipment, and adapting to various operating modes.

[0089] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A biomimetic shredding outer blade with a micro / nano structure on the crown surface, characterized in that: Includes the cutter head (1), the cutter body (2), and the locking sleeve (3); The cutter head (1) includes a crown surface (1-1), cutting particles (1-2), a cutting edge protrusion (1-3), a mounting slider (1-4), a locking hole (1-5), and a main cutting edge (1-6); the cutter body (2) includes a mounting groove (2-1), a connecting slide rail (2-2), a near-tool holder curved surface (2-3), and a far-tool holder curved surface (2-4); the locking sleeve (3) includes an arc-shaped hole (3-1) and a locking through hole (3-2). The main cutting edge (1-6) and the far tool holder curved surface (2-4) are arranged from front to back as follows: tooth crown surface (1-1), cutting particles (1-2), cutting edge protrusion (1-3), mounting slider (1-4), locking hole (1-5), mounting groove (2-1), connecting slide rail (2-2), arc-shaped hole (3-1), locking through hole (3-2), and near tool holder curved surface (2-3). The tooth crown surface (1-1), cutting particles (1-2), blade protrusion (1-3), and main cutting edge (1-6) together constitute the cutting part, which performs rapid cutting and deep crushing of materials to meet the requirements of fine and uniform feed processing; the mounting slider (1-4), locking hole (1-5), mounting groove (2-1), connecting slide rail (2-2), arc hole (3-1), and locking through hole (3-2) together constitute the locking part, which uses the locking sleeve (3) and the structural features of the cutter head (1) and cutter body (2) to realize the disassembly and assembly of the cutter, giving the cutter detachable characteristics, which facilitates later maintenance and replacement operations; the near cutter holder curved surface (2-3) and the far cutter holder curved surface (2-4) together constitute the mounting part, which is tightly fitted with the cutter holder (4) and cutter mounting plate (5) by three parallel bolts to achieve reliable positioning and installation.

2. The biomimetic shredding outer blade with micro / nano structure on the crown surface according to claim 1, characterized in that: The cutting particles (1-2) include a hexagonal stepped structure (1-2-1), an acute-angled cutting edge (1-2-2), and a back ridge cutting edge (1-2-3); the cutting edge protrusion (1-3) includes a sharp cutting tip (1-3-1) and two irregular curved surfaces: a left curved surface (1-3-2) and a right curved surface (1-3-3). The crown surface (1-1) is biomimetic to the curve of the lower incisor of a beaver in nature. The cutting particles (1-2) and the cutting edge protrusions (1-3) are fixedly connected to the outer surface of the crown surface (1-1). The cutting particles (1-2) are biomimetic to the microstructure of a honeycomb and a beaver incisor. The six sides of the bottom hexagon are closely fitted with the sides of the adjacent particles, forming a compact and uniformly stressed array of cutting units. The cutting edge protrusions (1-3) are equidistant along the arc of the main cutting edge (1-6). The array is arranged to ensure that the sharp edges (1-3-1) of all the protruding edges (1-3) are coplanar on the same cutting arc surface and are evenly interspersed in the dense array of cutting particles (1-2). The left curved surface (1-3-2) is tangent to the right side, right front side, and right rear sidewall of the left cutting particle (1-2), and the right curved surface (1-3-3) is tangent to the left side, left front side, and left rear sidewall of the right cutting particle (1-2). The back of the cutting edge of the main cutting edge (1-6) is fixedly connected to the front edge of the crown surface (1-1). The mounting slider (1-4) is located on the rear side of the cutter head (1). The outer wall of the mounting track, which consists of four segments: a straight line, a trapezoidal boss, a straight line, and an arc, fits against the inner wall of the mounting groove (2-1) at the front end of the cutter body (2). The cutter head (1) and the cutter body (2) can be disassembled and assembled through a sliding connection. The locking hole (1-5) is located on the left and right side walls of the mounting slider (1-4). It is connected to the locking through hole (3-2) on the side walls of the locking sleeve (3) by bolts to prevent the cutter head (1) and the cutter body (2) from moving laterally. The connecting slide rail (2-2) is located on the back of the cutter body (2). It starts from the outside of the mounting groove (2-1) and ends at the curved surface (2-3) near the cutter seat. It slides with the arc hole (3-1) that runs through the front and rear end faces of the locking sleeve (3) to restrict the sliding trajectory of the locking sleeve (3) and help to fix the cutter head (1) and the cutter body (2) laterally. The near-blade holder curved surface (2-3) is located at the rear end of the blade body (2), and the far-blade holder curved surface (2-4) is located below the near-blade holder curved surface (2-3). Both of them are smoothly connected to the outer side of the mounting groove (2-1), and the left and right sides are flush with the two sides of the blade head (1), so that the blade is curved as a whole, which effectively reduces material slippage during the chopping process, reduces cutting resistance, and improves chopping quality. The locking sleeve (3) is installed to the tool body via the near tool holder curved surface (2-3) and the far tool holder curved surface (2-4). The auxiliary locking sleeve (3) is fixed to the outside of the tool body (2) by fitting the connecting slide rail (2-2) and the arc hole (3-1). The cutting particles (1-2) are closely arranged on the outer surface of the crown surface (1-1). The bottom surface of the hexagonal stepped structure (1-2-1) is fixedly attached to the crown surface (1-1). Each layer has an acute-angled cutting edge (1-2-2) on its edge, which extends along the edge of the hexagonal stepped structure (1-2-1). The back ridge blade (1-2-3) stands vertically on the top layer of the cutting particles (1-2). The blade surface is parallel to the material flow direction. The size of the nine blades decreases from the center line of the hexagon to the two sides. The largest blade is located on the center line of the hexagon, and the remaining blades are symmetrically distributed along the center line. The sharp cutting edge (1-3-1) is located at the leading edge of the blade protrusion (1-3). The two sides of the blade protrusion (1-3) are irregular curved surfaces, namely the left curved surface (1-3-2) and the right curved surface (1-3-3).

3. The biomimetic shredding outer blade with micro / nano structure on the crown surface according to claim 1, characterized in that: The crown surface (1-1) is inspired by the natural curved contour of the beaver's mandibular incisors. The crown surface is basically fitted to the cusp curve of the beaver incisors. In the spatial rectangular coordinate system O In xyz, with the midpoint of the leading edge of the crown surface (1-1) as the origin O, the x-axis is forward, the y-axis is to the right, and the z-axis is upward. The mathematical expression of its cutting edge curve on the plane xOz is as follows: 。 4. The biomimetic shredding outer blade with micro / nano structure on the crown surface according to claim 1, characterized in that: The cutting particles (1-2) adopt a four-layer stepped hexagonal cutting structure: The cutting particles (1-2) are arranged with the material feeding direction as the negative x-axis and the perpendicular y-axis as the feeding direction. Each layer is distributed in a gradually decreasing manner along the negative x-axis, that is, the size decreases from bottom to top, forming a hexagonal stepped structure (1-2-1). This structure draws on the characteristics of the close arrangement of hexagons in the honeycomb of bees in nature, making the most of space and ensuring the stability of the particle structure. The material contact edges of the cutting particles (1-2) from the bottom to the third layer are all provided with acute-angle cutting edges (1-2-2) with a cutting edge angle of 30°, which facilitates stress concentration. Combined with the squeezing and shearing action provided by the rapid rotation of the cutter roller during the cutting process, it induces the generation of transverse initial cracks parallel to the direction of the material stem. The cutting particles (1-2) have nine back ridge blades (1-2-3) symmetrically distributed along the x-axis, with the blade direction parallel to the x-axis. The size of the main cutting edge decreases along both positive and negative sides of the y-axis. The overall back ridge blade spatial arrangement is approximately arched, which can directionally expand and break the initial crack. The hexagonal stepped structure (1-2-1) provides a stable structural framework through honeycomb arrangement and also provides a basic carrier for the features of acute-angle cutting edges (1-2-2) and back ridge cutting edges (1-2-3), adapting to their spatial arrangement. During the cutting process, the material first contacts the acute-angle cutting edges (1-2-2) of the first three layers. Utilizing the sharp angle characteristics and the squeezing and shearing action, it creates an initial transverse crack, providing a cutting starting point for subsequent crack propagation. The material with the initial crack continues to be fed to the top layer, where the nine back ridge cutting edges (1-2-3) receive the cracked area. Through the cutting action of the blades, the initial crack is propagated along the fracture direction, or even completely split.

5. The biomimetic shredding outer blade with micro / nano-structured tooth crown surface according to claim 1, characterized in that: The blade protrusions (1-3) have a streamlined profile and are arranged at intervals along the length of the tooth crown surface. Each protrusion has a sharp blade tip (1-3-1) at its front end, which forms concentrated stress on the material and generates transverse initial cracks. The smooth curved surfaces on both sides of the protruding cutting edge (1-3) utilize the "streamlined drag reduction" characteristic in fluid mechanics to guide the material to flow along the protruding contour towards the blade body. Simultaneously, through the combined effects of compression and shearing of the curved surfaces, the already generated transverse cracks are further expanded and penetrated. In the spatial rectangular coordinate system O... In xyz, the mathematical expression of the left curved surface (1-3-2) on the projection plane xOy is: x 13.370039 0.118766]; The mathematical expression of the right-side curved surface (1-3-3) on the projection plane xOy is: x 13.362826, 0.085890]; The sharp cutting edge (1-3-1) of the protruding blade (1-3) and the curved edges on both sides complete the "crack-expansion" collaborative cutting, ultimately achieving fine crushing of the material.

6. The biomimetic shredding outer blade with micro / nano structure on the crown surface according to claim 1, characterized in that: The opening angle of the main cutting edge (1-6) is set to 30°-32°, matching the actual cutting edge angle of the beaver incisor.

7. The biomimetic shredding outer blade with micro / nano structure on the crown surface according to claim 1, characterized in that: The mounting slider (1-4), mounting groove (2-1), connecting slide rail (2-2), and locking sleeve (3) work together to form a mortise and tenon quick-release locking structure: The blade head (1) has a circular mounting slider (1-4) on its rear side. The slider and the corresponding mounting groove (2-1) on the blade body (2) form a mortise and tenon sliding fit. The outline of the mounting groove (2-1) is precisely matched with the shape of the mounting slider (1-4). This not only guides the mounting slider (1-4) to slide along the mounting groove (2-1) in a directional manner, avoiding deviation during assembly, but also allows the mounting slider (1-4) to bear the radial cutting load of the shredder during operation through the surface contact between the mounting slider (1-4) and the mounting groove (2-1), reducing local stress concentration. Two connecting slide rails (2-2) are provided on the outside of the mounting slide groove (2-1). Their arched contours are adapted to the arc-shaped holes (3-1) opened at the corresponding positions of the locking sleeve (3), and the two form a fitting sliding pair. When disassembling the cutter head, the arc-shaped holes (3-1) slide along the arched slide rails, constraining the locking sleeve (3) to always move smoothly in a straight line direction, eliminating the problem of trajectory deviation caused by sliding during the disassembly and assembly of the locking sleeve (3), and at the same time, making the force of the locking sleeve (3) evenly transmitted along the curved surface of the slide rail, avoiding local wear. Locking holes (1-5) and locking through holes (3-2) are opened on both sides of the cutting head (1) and the locking sleeve (3). After the mounting slider (1-4) slides along the mounting groove (2-1) to the assembly station and the locking sleeve (3) reaches the locking position, the transverse fastening is achieved by threaded connection to prevent the cutting head (1) from moving axially along the mounting groove (2-1) and effectively improve the reliability of the connection.

8. The biomimetic shredding outer blade with micro / nano structure on the crown surface according to claim 1, characterized in that: The tail of the cutter body (2) is composed of a near-tool holder curved surface (2-3) and a far-tool holder curved surface (2-4), which match the contour of the tool holder and the contour of the tool mounting plate. This enables reliable positioning of the cutter body and the tool holder, further improving the stability of the installation. At the same time, the arc-shaped curved line can disperse the cutting reaction force during operation, avoid stress concentration at the tail, and improve the structural durability of the cutter body (2). In the spatial rectangular coordinate system O-xyz, the mathematical expression of the near-tool holder curved surface (2-3) on the projection plane xOz is: ； The mathematical expression for the far-end surface (2-4) on the projection plane xOz is: 。

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