A wood chipper knife with a strong cutting force

Abstract

The utility model discloses a wood chipper blade of strong cutting force relates to timber processing equipment field. It includes shaft body and a plurality of blade, and the middle part of shaft body is equipped with polygonal mounting section (preferably regular hexagon), and the middle part of blade is opened adaptive polygonal inner hole and is set on the shaft body, and the outer periphery of blade is crescent and forms two outward curved arc cutting edges, and a plurality of blade contains a plurality of different outer diameter specifications, and is stacked along the shaft body axial direction and constitutes multilayer grading cutting structure, and the both ends of shaft body are equipped with the cylindrical section of the diameter less than the opposite side distance of polygonal mounting section. This structure passes through polygonal cooperation and stably transfers torque, and arc blade enhances cutting force, and grading stacks adapt different timber, and the cylindrical section is convenient to assemble, solves the problem of traditional blade torque instability, cutting force deficiency, grading effect is poor and the assembly is inconvenient, and is suitable for high -efficient wood operation.

Description

Technical Field

[0001] This utility model provides a wood chipper blade, and particularly relates to a wood chipper blade with strong cutting force. Background Technology

[0002] Wood chipper blades are the core components of wood processing equipment used for crushing wood. Their main function is to cut and pulverize wood through high-speed rotation. They are widely used in forestry logging residue treatment, papermaking raw material pretreatment, biomass energy processing and other fields. The rationality of their structure directly affects the wood chipping efficiency and the stability of equipment operation.

[0003] Existing wood chipper blades typically consist of a shaft and blades mounted on the shaft. The shaft is usually a smooth cylindrical structure, with a circular inner hole in the center of the blade that mates with the shaft. The outer periphery of the blade usually features a single cutting edge or a simple symmetrical straight cutting edge, and the assembled blades are often of the same outer diameter. The two ends of the shaft also often use a cylindrical structure with the same diameter as the center. However, this structure has significant drawbacks: the circular fit between the shaft and the blade can easily cause circumferential slippage of the blade during high-speed rotation, resulting in unstable torque transmission and affecting cutting efficiency; the single straight or simple arc-shaped cutting edge has a limited contact area with the wood, resulting in dispersed cutting force and difficulty in handling harder or coarser wood; blades of the same outer diameter cannot achieve graded crushing of wood of different sizes, requiring multiple crushing operations to achieve the desired particle size; and the structure of the shaft with the same diameter at both ends and the center increases the difficulty of positioning the blades during assembly, affecting installation efficiency and stability. Utility Model Content

[0004] In order to solve the above problems, this application provides a wood chipper blade with strong cutting force, which solves the problems of unstable torque transmission, insufficient cutting force, poor grading and crushing effect and inconvenient assembly of traditional wood chipper blades.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a wood chipper blade with strong cutting force, comprising:

[0006] Shaft body: extending axially, the shaft body has a polygonal mounting section in the middle;

[0007] Several blades: Each blade has a polygonal inner hole in the middle that is adapted to the polygonal mounting section, and the blade is sleeved on the polygonal mounting section of the shaft through the polygonal inner hole;

[0008] The outer periphery of the blade is crescent-shaped, and the crescent-shaped outer periphery forms two outwardly protruding cutting edges.

[0009] Preferably, the polygonal mounting segment is a regular hexagonal mounting segment, and the polygonal inner hole is a regular hexagonal inner hole.

[0010] Preferably, the plurality of blades includes blades with different outer diameters, and the plurality of blades are stacked sequentially along the axial direction of the shaft to form a multi-layer graded cutting structure.

[0011] Preferably, the shaft has cylindrical segments at both ends, and the diameter of the cylindrical segments is smaller than the distance between opposite sides of the polygonal mounting segment.

[0012] Preferably, the two cutting edges of the crescent-shaped outer periphery of the blade have an outwardly curved arc-shaped blade structure.

[0013] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0014] This high-cutting-force wood chipper blade addresses the problems of unstable torque transmission, insufficient cutting force, poor grading and crushing effect, and inconvenient assembly inherent in traditional wood chipper blades. It avoids circumferential slippage of the blade by adapting the polygonal mounting section of the shaft to the polygonal inner hole of the blade, thus stably transmitting wood-crushing torque. The crescent-shaped outer periphery of the blade and the outwardly curved arc cutting edge increase the cutting contact area and blade strength, enhancing cutting force. Multiple blades with different outer diameters are stacked sequentially along the shaft axis to form a multi-layered grading cutting structure, adapting to the crushing needs of different sized wood materials. Cylindrical sections at both ends of the shaft, with a diameter smaller than the distance between opposite sides of the polygonal mounting section, assist in assembly positioning and improve overall installation stability, achieving multi-dimensional optimization of torque, cutting, grading, and assembly.

[0015] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0016] Figure 1 This is a three-dimensional installation diagram of a wood chipper blade with strong cutting force according to this utility model;

[0017] Figure 2 This is a diagram showing the explosion of a wood chipper blade with high cutting force according to this utility model.

[0018] Figure 3 This is an exploded view of the shaft portion of a wood chipper blade with high cutting force according to this utility model.

[0019] Figure 4 This is a three-dimensional schematic diagram of a wood chipper blade with strong cutting force according to this utility model.

[0020] As shown in the figure:

[0021] 1. Shaft; 11. Polygonal mounting section; 2. Blade; 21. Polygonal inner hole; 22. Cutting edge; 12. Cylindrical section; Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] like Figure 1 and Figure 2 As shown, a wood chipper blade with strong cutting force includes a shaft 1 extending along the axial direction, with a regular hexagonal mounting section 11 in the middle of the shaft 1; a plurality of blades 2 have regular hexagonal inner holes 21 in the middle that are adapted to the regular hexagonal mounting section 11, and are sleeved on the regular hexagonal mounting section 11 through the inner holes; the outer periphery of the blades 2 is crescent-shaped, and the crescent-shaped outer periphery forms two outwardly curved arc-shaped cutting edges 22.

[0026] In this implementation scheme, the hexagonal mounting section 11 of the shaft 1 and the hexagonal inner hole 21 of the blade 2 form a tight geometric fit, preventing the blade 2 from rotating relative to the shaft 1 in the circumferential direction when it is fitted onto the shaft 1, thus ensuring that the shaft 1 can stably transmit torque to the blade 2 when rotating. The crescent-shaped outer periphery of the blade 2 surrounds the outside of the shaft 1, and two outwardly curved arc-shaped cutting edges 22 are symmetrically distributed along the outer periphery and protrude from the blade body. From the implementation points, the hexagonal fit structure eliminates the slippage phenomenon that easily occurs when the traditional circular shaft and blade fit together, ensuring the stability of power transmission. The design of the crescent-shaped outer periphery and the arc-shaped cutting edges 22 increases the contact area between the blade and the wood on the one hand, and disperses the cutting stress by utilizing the curved surface characteristics of the arc-shaped edge on the other hand, improving the impact resistance and cutting force of the blade. Through structural shape optimization and fit enhancement, the problems of unstable torque transmission and insufficient cutting force of existing wood chipper blades are effectively solved, significantly improving wood chipping efficiency and equipment operation reliability.

[0027] like Figure 3 and Figure 4 As shown, several blades 2 include various specifications with different outer diameters. The various blades 2 are stacked sequentially along the axial direction of the shaft 1 to form a multi-layer graded cutting structure. The two ends of the shaft 1 are provided with cylindrical sections 12, the diameter of which is smaller than the distance between opposite sides of the regular hexagonal mounting section 11.

[0028] In this embodiment, multiple blades 2 with different outer diameters are stacked sequentially along the axial direction of the shaft 1, so that during the wood-chopping process, the blades 2 at different positions can act on wood of different sizes. The outer layer of large outer diameter blades 2 first performs preliminary cutting on the coarser wood, and the inner layer of small outer diameter blades 2 further crushes the finer wood after preliminary cutting, forming an orderly multi-layer graded cutting. The cylindrical sections 12 at both ends of the shaft 1 are located on both sides of the regular hexagonal mounting section 11. Because their diameter is smaller than the distance between opposite sides of the regular hexagonal mounting section 11, they can play a preliminary role in axially limiting the blades 2 when assembling them, preventing the blades 2 from slipping off from both ends of the shaft 1. From the perspective of implementation, the multi-layer graded cutting structure changes the situation where the outer diameter of the blades in traditional wood chippers is single and multiple crushing operations are required to process wood of different sizes, thus improving the overall efficiency of wood chipping. The cylindrical sections 12 at both ends of the shaft 1 solve the problem of difficult assembly and positioning of the blades 2 caused by the equal diameter of the ends and the middle of the traditional shaft, making the assembly process more convenient and stable. Through these structural designs, the performance of the wood chipper blades is further optimized, and its applicability in practical applications is improved.

[0029] In actual use, this device needs to be installed in the frame bearing seat of the wood chipper. The cylindrical section 12 of the shaft body 1 cooperates with the rolling bearing in the bearing seat to achieve rotational support. One end of the shaft body 1 needs to be connected to the output shaft of the drive motor of the wood chipper through a coupling to obtain power. The shaft body 1 can be made of 45 steel, and the blade 2 can be made of 65Mn spring steel. It also needs to be equipped with a lock nut and a washer. The blade 2 is axially fastened by the washer fitting against the end face of the outermost blade 2 and the lock nut threaded to the unmarked threaded section of the cylindrical section 12 at the end of the shaft body 1, so as to ensure the stable operation of the overall structure when the wood is being chipped at high speed.

[0030] Specifically, when installing the high-cutting-force wood chipper blades, first insert the cylindrical sections 12 at both ends of the shaft 1 into the pre-set bearing seats on the wood chipper frame. The shaft 1 is rotated and supported by deep groove ball bearings within the bearing seats. Then, connect one end of the cylindrical section 12 of the shaft 1 to the output shaft of the wood chipper's drive motor via a flexible pin coupling to ensure stable power transmission from the motor to the shaft 1. When assembling the blades 2, arrange the various blades 2 sequentially on the hexagonal mounting section 11 of the shaft 1 in descending order of outer diameter. After stacking, place washers on the cylindrical sections 12 at both ends of the shaft 1, then tighten the round nuts until the washers are tightly fitted against the end face of the outermost blade 2, thus axially fixing the blades 2. During operation, start... The drive motor drives the shaft 1 and the blades 2 mounted on it to rotate at high speed through a coupling. The wood to be crushed enters the crushing chamber through the feed hopper of the wood chipper. It first contacts the cutting edge 22 of the outer large-diameter blade 2 and is initially cut into larger pieces. These pieces move inward under the action of gravity and centrifugal force, and come into contact with the cutting edge 22 of the middle and inner small-diameter blades 2 and are further crushed. Finally, the crushed wood fragments are discharged through the discharge port at the bottom of the crushing chamber. Throughout the process, the bearing seat bears the radial force of the shaft 1, and the round nut and washer cooperate to prevent the blades 2 from moving axially when rotating at high speed. The speed of the drive motor is adjusted by the frequency converter of the wood chipper to adapt to the crushing requirements of wood with different hardness.

[0031] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A wood chipper blade with high cutting force, characterized in that, include: Shaft (1): Extending axially, the shaft (1) has a polygonal mounting section (11) in the middle; A plurality of blades (2): Each blade (2) has a polygonal inner hole (21) in the middle that is adapted to the polygonal mounting section (11), and the blade (2) is sleeved on the polygonal mounting section (11) of the shaft (1) through the polygonal inner hole (21); The outer periphery of the blade (2) is crescent-shaped, and the crescent-shaped outer periphery forms two outwardly protruding cutting edges (22).

2. The wood chipper blade with high cutting force according to claim 1, characterized in that: The polygonal mounting segment (11) is a regular hexagonal mounting segment, and the polygonal inner hole (21) is a regular hexagonal inner hole.

3. The wood chipper blade with high cutting force according to claim 1, characterized in that: The plurality of blades (2) include blades with different outer diameters, and the plurality of blades (2) are stacked sequentially along the axial direction of the shaft (1) to form a multi-layer graded cutting structure.

4. A wood chipper blade with high cutting force according to claim 1, characterized in that: The shaft (1) has cylindrical sections (12) at both ends, and the diameter of the cylindrical section (12) is smaller than the distance between opposite sides of the polygonal mounting section (11).

5. A wood chipper blade with high cutting force according to claim 1, characterized in that: The two cutting edges (22) on the crescent-shaped outer periphery of the blade (2) have an outwardly curved arc-shaped blade structure.

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