A cutting mechanism of a wood crusher

Abstract

The present invention provides a cutting mechanism of a wood crusher, belonging to the technical field of wood crushing equipment, comprising a main shaft and a cutting disc, wherein the cutting end of the cutting disc is provided with a plurality of groups of circumferentially distributed cutting components, wherein the cutting components comprise a cutting knife, a roughening roller and a sanding sheet arranged in sequence along the opposite direction of rotation of the cutting disc, the distances by which the cutting knife, the roughening roller and the sanding sheet protrude from the end face of the cutting end of the cutting disc decrease in sequence, the cutting knife is floatingly arranged in the discharge groove, the end face of the cutting end of the cutting disc is provided with a mounting groove, and the roughening roller is floatingly arranged in the mounting groove; when the wood is harder, the cutting knife can shrink inwards, and the roughening nails on the roughening roller squeeze the surface of the wood to make the surface of the wood loose, and when there are hard metals such as iron nails on the wood, the cutting knife and the roughening roller are squeezed inwards and shrink, and the iron nails are ground with sanding sheets to avoid the iron nails causing the cutting knife to break.

Description

Technical Field

[0001] The invention belongs to the technical field of wood crushing equipment, and in particular relates to a cutting mechanism of a wood crusher. Background Art

[0002] Wood crusher is a widely used equipment for wood processing. It is designed to crush logs, branches, old furniture and other wood waste into wood chips or particles quickly and efficiently. The crushed wood particles are discharged from the crusher in a timely and effective manner through the discharge system for subsequent processing and utilization. The working principle is that the original wood is conveyed to the feed port of the crusher through a conveyor belt or other means. After entering the crusher, it is cut and hit by rotating knives and hammers to break it into small pieces or particles for the subsequent production of wood pulp and wood pulp fiber.

[0003] At present, the cutting blade of the wood crusher is fixed on the cutting disc. The cutting blade cuts the wood through the rotation of the cutting disc. However, the texture of the raw materials is not uniform. For example, the scars formed by the broken branches of the logs are of high hardness. For another example, the recycled wood may contain hard metals such as nails. When cutting raw materials with uneven texture, the load on the motor is unstable, which can easily lead to problems such as reduced motor efficiency and increased torque fluctuations. This will not only reduce the overall performance of the motor, but also may affect the stability and accuracy of the mechanical system connected to it. When encountering metals such as nails, it may even cause the cutting blade to break. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a cutting mechanism of a wood crusher, which at least partially solves the above problem.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a cutting mechanism of a wood crusher, comprising a main shaft and a cutting disc fixed at one end of the main shaft, the cutting disc is provided with a cutting end and a discharging end, and the cutting disc is provided with a plurality of discharging grooves penetrating the cutting end and the discharging end;

[0006] The cutting end of the cutting disc is provided with a plurality of groups of circumferentially distributed cutting parts for cutting wood;

[0007] The cutting component comprises a cutting knife, a roughening roller and a sanding sheet arranged in sequence in the opposite direction of the rotation of the cutting disc, and the distances of the cutting knife, the roughening roller and the sanding sheet protruding from the end surface of the cutting end of the cutting disc decrease in sequence;

[0008] The cutting blade is floatingly arranged in the discharge groove, and a first supporting component for applying elastic supporting force to the cutting blade is arranged in the discharge groove. When the impact force applied to the cutting blade is greater than the supporting force of the first supporting component, the cutting blade shrinks into the discharge groove;

[0009] The cutting end face of the cutting disk is provided with a mounting groove, the roughening roller is floatingly arranged in the mounting groove and can rotate, and the axial direction of the roughening roller is arranged along the radial direction of the cutting disk, and the side of the roughening roller is provided with roughening nails for roughening the surface of the wood, and the mounting groove is provided with a second supporting component for applying an elastic supporting force to the roughening roller, when the impact force applied to the roughening roller is greater than the supporting force of the second supporting component, the roughening roller shrinks into the mounting groove.

[0010] Furthermore, the first supporting component includes a knife root, a pressure hoop and a first elastic support seat, the knife root is integrally formed on the cutting knife, the pressure hoop is fixed in the discharge groove, the knife root slides in the pressure hoop, the first elastic support seat is arranged in the discharge groove, and the knife root is connected to the first elastic support seat.

[0011] Furthermore, the second supporting component includes two symmetrically arranged bearing seats and second elastic supporting seats, the two bearing seats are respectively connected to the two second elastic supporting seats, and the two ends of the napping roller are respectively connected to the two bearing seats.

[0012] Furthermore, the napping roller includes a rotating roller and a supporting shaft, and the supporting shaft is rotatably connected to a plurality of the rotating rollers along the length direction.

[0013] Furthermore, the cutting end surface of the cutting disk is provided with magnetic plates corresponding to the number of the sand sheets, and the magnetic plates are embedded and fixed on the cutting end surface of the cutting disk and covered by the sand sheets.

[0014] Furthermore, the sand sheet and the magnetic plate are both arranged in a fan shape, and the areas of the sand sheet and the magnetic plate are the same.

[0015] Furthermore, the cross-section of the discharge groove is set to a V-shaped structure, so that two symmetrical inclined surfaces are formed in the discharge groove, and the narrowed end of the discharge groove faces the cutting end of the cutting disk, and the enlarged end of the discharge groove faces the discharge end of the cutting disk.

[0016] Furthermore, the cutting blade is arranged on the inclined surface on the side of the discharge groove opposite to the rotation direction, and is arranged parallel to the inclined surface.

[0017] Furthermore, the depth of the mounting groove is greater than the diameter of the napping roller.

[0018] Furthermore, a mounting frame is fixed on the main shaft, and a plurality of hammer blades for wood breaking are movably connected to the mounting frame.

[0019] The beneficial effects achieved by the present invention using the above structure are as follows:

[0020] 1. By setting a cutting knife, a roughening roller and a sanding disc with decreasing cutting heights on the cutting end face of the cutting disc, and the cutting knife and the roughening roller are set in a floating manner, when the wood is hard, the cutting knife can shrink inward, and the roughening nails on the roughening roller squeeze the surface of the wood to make the surface of the wood loose, so that the cutting knife can cut the surface of the wood, avoiding the large resistance of the cutting disc causing an increase in the motor load, and improving the stability of the load on the motor;

[0021] 2. When there are hard metals such as nails on the wood, the cutting knife and the roughening roller are squeezed inward and contracted, and the nails are ground with sandpaper to prevent the cutting knife from breaking due to the nails. At the same time, there is no need to stop the machine to remove the nails, thus improving the continuity of equipment production. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a cutting mechanism of a wood crusher proposed in an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of a cutting mechanism of a wood crusher according to an embodiment of the present invention from another perspective;

[0024] Figure 3 A schematic diagram of the structure of the cutting end face of a cutting disc in a cutting mechanism of a wood crusher proposed in an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the position distribution of a cutting knife, a roughening roller and abrasive sheets in a cutting mechanism of a wood crusher proposed in an embodiment of the present invention;

[0026] Figure 5 A schematic structural diagram of a napping roller and a second supporting component in a cutting mechanism of a wood crusher proposed in an embodiment of the present invention;

[0027] Figure 6 A schematic structural diagram of a cutting blade and a first supporting component in a cutting mechanism of a wood crusher proposed in an embodiment of the present invention;

[0028] Figure 7 A schematic diagram of the position distribution of the roughening nails in the cutting mechanism of a wood crusher proposed in an embodiment of the present invention;

[0029] Figure 8 A schematic diagram of the installation position of a magnetic plate in a cutting mechanism of a wood crusher proposed in an embodiment of the present invention.

[0030] Among them, 1. main shaft; 2. cutting disc; 201. discharge trough; 202. mounting groove; 3. mounting frame; 31. hammer blade; 4. cutting knife; 41. knife root; 42. pressure hoop; 43. first elastic support seat; 5. roughening roller; 501. roughening nail; 51. rotating roller; 52. supporting shaft; 53. bearing seat; 54. second elastic support seat; 6. sanding sheet; 7. magnetic plate.

[0031] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0034] like Figure 1 As shown, the present invention proposes a cutting mechanism of a wood crusher, including a main shaft 1 and a cutting disc 2, the cutting disc 2 is coaxially fixed at one end of the main shaft 1, the end of the cutting disc 2 away from the main shaft 1 is the cutting end, and the other end is the discharging end, the cutting end of the cutting disc 2 is provided with a plurality of groups of circumferentially distributed cutting components for cutting wood, the main shaft 1 is driven by an external motor, so that the main shaft 1 drives the cutting disc 2 to rotate, and the cutting disc 2 is provided with a plurality of discharging grooves 201 penetrating the cutting end and the discharging end, the wood chips cut by the cutting end of the cutting disc 2 are transported to the discharging end of the cutting disc 2 via the discharging grooves 201, and finally enter the machine chamber of the cutting machine.

[0035] Furthermore, a mounting frame 3 is fixed on the main shaft 1, and a plurality of hammer blades 31 for wood crushing are movably connected to the mounting frame 3. The mounting frame 3 and the hammer blades 31 are located in a machine chamber of the cutting machine. The mounting frame 3 and the hammer blades 31 are driven to rotate by the main shaft 1. After the wood fragments transported through the discharge chute 201 enter the machine chamber, the rotating hammer blades 31 further strike and crush the wood fragments until the wood fragments can pass through the screen.

[0036] Combination Figure 1 , Figure 3 and Figure 4 As shown, the cutting component includes a cutting knife 4, a roughening roller 5 and a sanding sheet 6 arranged in sequence in the opposite direction of the rotation of the cutting disc 2, and the distances of the cutting knife 4, the roughening roller 5 and the sanding sheet 6 protruding from the cutting end surface of the cutting disc 2 decrease in sequence (the cutting height decreases in sequence);

[0037] Furthermore, the cutting blade 4 is floatingly arranged in the discharge groove 201, and a first supporting component for applying elastic supporting force to the cutting blade 4 is arranged in the discharge groove 201. The supporting force of the first supporting component is relatively large, which satisfies the supporting force required by the cutting blade 4 for cutting ordinary wood. When the impact force on the cutting blade 4 is greater than the supporting force of the first supporting component, the cutting blade 4 can slide and shrink into the discharge groove 201.

[0038] Furthermore, the cutting end face of the cutting disc 2 is provided with a mounting groove 202, the roughening roller 5 is floatingly arranged in the mounting groove 202 and can rotate, and the axial direction of the roughening roller 5 is arranged along the radial direction of the cutting disc 2, and the side of the roughening roller 5 is provided with a roughening nail 501 for roughening the wood surface. When the cutting blade 4 is retracted, the roughening roller 5 can contact the wood and roll along the wood surface. At this time, under the action of pressure, the roughening nail 501 on the roughening roller 5 squeezes the wood surface to make the wood surface soft (such as Figure 7 shown);

[0039] A second supporting component for applying elastic supporting force to the napping roller 5 is provided in the installation groove 202. The second supporting component has a large supporting force, which satisfies the supporting force required by the napping nail 501 to squeeze the wood surface to soften the wood surface. When the impact force on the napping roller 5 is greater than the supporting force of the second supporting component, the napping roller 5 can shrink into the installation groove 202.

[0040] Furthermore, the sanding disc 6 is fixed to the cutting end surface of the cutting disc 2 .

[0041] In this way, when the cutting disc 2 rotates to cut the wood, the cutting blade 4 cuts the wood. When the wood is hard, the cutting blade 4 contracts inward. At this time, the roughening roller 5 can contact the wood and roll along the surface of the wood. The roughening nails 501 on the roughening roller 5 squeeze the surface of the wood, so that holes are generated on the surface of the wood, thereby making the texture of the wood loose, so that the cutting blade 4 can cut the surface of the wood, avoiding the large resistance of the cutting disc 2 to increase the motor load, and improving the stability of the load on the motor.

[0042] When there are hard metals such as iron nails on the wood, the cutting knife 4 and the roughening roller 5 cannot cut them, and the cutting knife 4 and the roughening roller 5 are squeezed inward and contracted. At this time, the sand sheet 6 fixed on the cutting disc 2 can contact the iron nails, and the iron nails are ground by the sand sheet 6 to prevent the iron nails from causing the cutting knife 4 to break. At the same time, there is no need to stop the machine to remove the iron nails, thereby improving the continuity of equipment production.

[0043] In a specific embodiment, the first supporting member includes a blade root 41, a pressure hoop 42 and a first elastic support seat 43, the blade root 41 is integrally formed on the cutting blade 4, the pressure hoop 42 is fixed in the discharge groove 201, and the blade root 41 slides in the pressure hoop 42 (such as Figure 6 As shown in the figure), when the cutting knife 4 is extended and retracted, the blade root 41 slides in the pressure hoop 42, and the pressure hoop 42 guides the sliding of the cutting knife 4. The first elastic support seat 43 is arranged in the discharge groove 201, and the blade root 41 is connected to the first elastic support seat 43, and the first elastic support seat 43 provides elastic support force to the cutting knife 4.

[0044] In an optional embodiment, the first elastic support seat 43 includes a leaf spring, and the blade root 41 is connected to the middle position of the leaf spring (such as Figure 6 As shown in the figure, the leaf spring has a large supporting force, and the supporting force can be increased by stacking multiple leaf springs, thereby satisfying the supporting force required by the cutting knife 4 for cutting ordinary wood. When the impact force received by the cutting knife 4 is greater than the supporting force of the leaf spring, the leaf spring deforms to store force and absorbs the impact force. When the impact force received by the cutting knife 4 is less than the supporting force of the leaf spring, the leaf spring pushes the cutting knife 4 outward to cut the wood again.

[0045] In a specific embodiment, the second supporting component includes two symmetrically arranged bearing seats 53 and a second elastic supporting seat 54. The two bearing seats 53 are respectively connected to the two second elastic supporting seats 54. The two ends of the roughening roller 5 are respectively connected to the two bearing seats 53. The second elastic supporting seat 54 provides elastic supporting force to the roughening roller 5.

[0046] In an optional embodiment, the second elastic support seat 54 includes a leaf spring, which has a large supporting force and can be increased by stacking multiple leaf springs to meet the supporting force required for the roughening nail 501 to squeeze the wood surface to soften the wood surface. When the pressure applied to the roughening roller 5 is greater than the supporting force of the leaf spring, the leaf spring deforms and accumulates force, and always applies pressure to the roughening roller 5 in the direction of the wood, so that the roughening nail 501 can gradually squeeze the wood surface to soften it.

[0047] Combination Figure 4 As shown, the first elastic support seat 43 and the second elastic support seat 54 have sufficient elastic travel, so that the cutting knife 4 and the roughening roller 5 can be completely retracted to below the cutting height of the sanding sheet 6, so that the sanding sheet 6 can grind the nails in the wood.

[0048] Combination Figure 2 As shown, the cutting blades 4 in each discharge groove 201 are arranged in plurality rather than being arranged as a whole. When the cutting blade 4 is damaged by collision, only the corresponding cutting blade 4 needs to be replaced, thereby reducing the maintenance cost. The number of first supporting components in each discharge groove 201 corresponds to the number of cutting blades 4, and the multiple cutting blades 4 are independently supported to avoid mutual influence between the multiple cutting blades 4.

[0049] Combination Figure 3 As shown, a plurality of roughening rollers 5 can be provided in each group of cutting components, and the plurality of roughening rollers 5 are distributed along the circumference of the cutting disk 2. Accordingly, the mounting grooves 202 for installing the roughening rollers 5 and the second supporting components for supporting the roughening rollers 5 are both arranged to correspond to the number of the roughening rollers 5.

[0050] Combination Figure 5 As shown, the roughening roller 5 includes a rotating roller 51 and a supporting shaft 52. The supporting shaft 52 is rotatably connected to a plurality of rotating rollers 51 along the length direction. The roughening roller 5 is composed of a plurality of rotating rollers 51 which are shorter in length and can rotate independently of each other. When in contact with the wood, the rotation speed is adapted according to the shape of the wood to avoid the roughening nails 501 from breaking due to the consistent rotation speed.

[0051] Combination Figure 8 As shown, the cutting end surface of the cutting disc 2 is provided with a magnetic plate 7 corresponding to the number of sand sheets 6. The magnetic plate 7 is embedded and fixed on the cutting end surface of the cutting disc 2 and is covered by the sand sheets 6. When the sand sheets 6 grind the nails, the metal debris generated can be adsorbed on the sand sheets 6 under the magnetic attraction of the magnetic plate 7, thereby reducing the mixing of magnetic metal debris into the wood chips, thereby reducing the workload for subsequent wood chip removal.

[0052] Furthermore, the sand sheet 6 and the magnetic plate 7 are both arranged in a sector shape, and the areas of the sand sheet 6 and the magnetic plate 7 are the same, so that the areas of the sand sheet 6 and the magnetic plate 7 are larger, thereby increasing the coverage area.

[0053] In an optional embodiment, the magnetic plate 7 is a neodymium iron boron magnet, which has a strong magnetic force and can generate a strong magnetic attraction to the magnetic metal debris, causing it to adhere to the sand sheet 6.

[0054] Combination Figure 2 As shown, the cross-section of the discharge trough 201 is set to a V-shaped structure, so that two symmetrical inclined surfaces are formed in the discharge trough 201, and the narrowed end of the discharge trough 201 faces the cutting end of the cutting disk 2, and the enlarged end of the discharge trough 201 faces the discharge end of the cutting disk 2. The smaller narrowed end can maintain the rigidity of the cutting disk 2, and the larger enlarged end can increase the discharge space to avoid wood chips from clogging in the discharge trough 201.

[0055] Furthermore, the cutting blade 4 is arranged on the inclined surface on the opposite side of the discharge groove 201 close to the rotation direction, and is arranged parallel to the inclined surface. The inclined cutting blade 4 can better cut the wood during the rotational cutting process, and can shrink quickly when subjected to a large impact force, thereby reducing the probability of the cutting blade 4 being broken.

[0056] Combination Figure 8 As shown, the depth of the mounting groove 202 is greater than the diameter of the roughening roller 5. In a specific embodiment, the depth of the mounting groove 202 can allow the roughening roller 5 and the roughening nail 501 to be completely retracted into the mounting groove 202, thereby preventing the roughening roller 5 from colliding with the bottom of the mounting groove 202 when it is retracted.

[0057] The working principle of the present invention is as follows: the main shaft 1 is driven by an external motor, so that the main shaft 1 can drive the cutting disc 2 to rotate, and the cutting knife 4 cuts the wood first. When the wood is hard, the cutting knife 4 can shrink inwards. At this time, the roughening roller 5 can contact the wood and roll along the surface of the wood. The roughening nails 501 on the roughening roller 5 squeeze the surface of the wood, so that holes are generated on the surface of the wood, thereby making the texture of the wood loose, so that the cutting knife 4 can cut the surface of the wood, avoiding the large resistance of the cutting disc 2 to increase the motor load, and improving the stability of the load on the motor;

[0058] When there are hard metals such as nails on the wood, the cutting knife 4 and the roughening roller 5 cannot cut them, and the cutting knife 4 and the roughening roller 5 are squeezed inward and contracted. At this time, the sand sheet 6 fixed on the cutting disc 2 can contact the nails, and the nails are ground by the sand sheet 6 to avoid the cutting knife 4 from breaking due to the nails. At the same time, there is no need to stop the machine to remove the nails, thereby improving the continuity of equipment production. The cutting disc 2 is provided with a plurality of discharge grooves 201 that pass through the cutting end and the discharge end. The wood fragments cut by the cutting end of the cutting disc 2 are transported to the discharge end of the cutting disc 2 via the discharge groove 201, and finally enter the machine room of the cutting machine, and the rotating hammer blade 31 further hits and crushes the wood fragments until the wood fragments can pass through the screen.

[0059] In summary of the above embodiments: by arranging the cutting blade 4, the roughening roller 5 and the sanding sheet 6 with decreasing cutting heights on the cutting end face of the cutting disc 2, and the cutting blade 4 and the roughening roller 5 are floatingly arranged, when the wood is hard, the cutting blade 4 can be retracted inward, and the roughening nails 501 on the roughening roller 5 squeeze the surface of the wood to make the surface of the wood loose, so that the cutting blade 4 can cut the surface of the wood, avoiding the cutting disc 2 from being subjected to greater resistance and causing the motor load to increase, thereby improving the stability of the load on the motor;

[0060] When there are hard metals such as nails on the wood, the cutting blade 4 and the roughening roller 5 are squeezed inward and contracted, and the nails are ground with sandpaper 6 to prevent the cutting blade 4 from breaking due to the nails. At the same time, there is no need to stop the machine to remove the nails, thereby improving the continuity of equipment production.

[0061] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0063] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A cutting mechanism of a wood crusher, characterized in that: It comprises a main shaft (1) and a cutting disc (2) fixed to one end of the main shaft (1), the cutting disc (2) being provided with a cutting end and a discharge end, and the cutting disc (2) being provided with a plurality of discharge grooves (201) penetrating the cutting end and the discharge end; The cutting end of the cutting disc (2) is provided with a plurality of groups of circumferentially distributed cutting components for cutting wood; The cutting component comprises a cutting knife (4), a roughening roller (5) and a sanding sheet (6) which are arranged in sequence in the opposite direction of rotation of the cutting disc (2), and the distances by which the cutting knife (4), the roughening roller (5) and the sanding sheet (6) protrude from the cutting end surface of the cutting disc (2) decrease in sequence; The cutting blade (4) is arranged in a floating manner in the discharge groove (201), and a first supporting component for applying an elastic supporting force to the cutting blade (4) is provided in the discharge groove (201); when the impact force applied to the cutting blade (4) is greater than the supporting force of the first supporting component, the cutting blade (4) contracts into the discharge groove (201); The cutting end surface of the cutting disc (2) is provided with a mounting groove (202), the depth of the mounting groove (202) is greater than the diameter of the roughening roller (5), the roughening roller (5) is floatingly arranged in the mounting groove (202) and is rotatable, and the axial direction of the roughening roller (5) is arranged along the radial direction of the cutting disc (2), and the side surface of the roughening roller (5) is provided with a roughening nail (501) for roughening the surface of the wood, and a second supporting component for applying an elastic supporting force to the roughening roller (5) is provided in the mounting groove (202), and when the impact force on the roughening roller (5) is greater than the supporting force of the second supporting component, the roughening roller (5) shrinks into the mounting groove (202); The first supporting component comprises a blade root (41), a pressure hoop (42) and a first elastic support seat (43); the blade root (41) is integrally formed on the cutting blade (4); the pressure hoop (42) is fixed in the material discharge groove (201); the blade root (41) slides in the pressure hoop (42); the first elastic support seat (43) is arranged in the material discharge groove (201); and the blade root (41) is connected to the first elastic support seat (43); The second supporting component comprises two symmetrically arranged bearing seats (53) and a second elastic supporting seat (54), the two bearing seats (53) are respectively connected to the two second elastic supporting seats (54), and the two ends of the napping roller (5) are respectively connected to the two bearing seats (53); The napping roller (5) comprises a rotating roller (51) and a support shaft (52); the support shaft (52) is rotatably connected to a plurality of the rotating rollers (51) along a length direction; The cutting end surface of the cutting disc (2) is provided with magnetic plates (7) corresponding to the number of the sand sheets (6); the magnetic plates (7) are embedded and fixed on the cutting end surface of the cutting disc (2) and covered by the sand sheets (6); the sand sheets (6) and the magnetic plates (7) are both arranged in a sector shape, and the areas of the sand sheets (6) and the magnetic plates (7) are the same; The cross section of the discharge groove (201) is arranged to be a V-shaped structure, so that two symmetrical inclined surfaces are formed in the discharge groove (201), and the narrowed end of the discharge groove (201) faces the cutting end of the cutting disc (2), and the enlarged end of the discharge groove (201) faces the discharge end of the cutting disc (2), and the cutting blade (4) is arranged on the inclined surface on the side of the discharge groove (201) opposite to the rotation direction, and is arranged parallel to the inclined surface; A mounting frame (3) is fixed on the main shaft (1), and a plurality of hammer blades (31) for breaking wood are movably connected to the mounting frame (3).

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