A wear-resistant wood chipper knife

Abstract

The utility model discloses a kind of wear-resistant wood chipper teeth, including tooth body, two symmetrical oblique cutting bosses are equipped on its front end upper portion, outer surface is inclined surface, and the inclined surface of both sides of body is smoothly connected;Body is strip-shaped and both ends are with fillet, bottom is arc surface, upper surface middle part has protruding part, top is provided with hexagonal recess, center has circular through-hole.When installing, it is fixed by through-hole and chipper rotating shaft connection;When operating, it rotates with rotating shaft, cutting boss and inclined surface cooperate to realize efficient cutting, each structure disperses stress, reduces friction, and improves wear resistance.

Description

Technical Field

[0001] This utility model provides a wood chipper tooth, and particularly relates to a wear-resistant wood chipper tooth. Background Technology

[0002] Wood chipper blades are the core components of wood processing equipment, mainly used for cutting and crushing wood raw materials. They achieve material crushing through high-speed contact with wood and are widely used in fields such as artificial board production and biomass energy processing. Their structural design directly affects processing efficiency, chip quality, and equipment lifespan.

[0003] Existing wood chipper blades typically consist of a single, integrated blade body with a single cutting section at the front. They are generally characterized by a regular, blocky structure, with sides that are mostly vertical planes or simple bevels, and a top that is usually flat or a simple protrusion. Furthermore, they lack a dedicated stress-dispersing structure. This type of structure has significant drawbacks: First, due to its simple structure, the cutting section experiences concentrated stress in a localized area, leading to rapid wear at the cutting point. Second, the large contact area between the sides and bottom of the blade body and the wood chips, coupled with a lack of optimized contour design, results in high frictional resistance, exacerbating overall wear. Third, the lack of an effective stress-dispersing structure makes the blade prone to deformation due to stress concentration over long-term use, further reducing wear resistance and structural stability. Utility Model Content

[0004] In order to solve the above problems, this application provides a wear-resistant wood chipper tooth, which solves the problems of rapid local wear of the cutting part, large overall friction loss, and easy deformation due to stress concentration.

[0005] To solve the above technical problems, the present invention provides the following technical solution: a wear-resistant wood chip cutting tooth, comprising a cutting tooth body, wherein two symmetrically distributed cutting protrusions are provided at the upper front end of the cutting tooth body, and an upwardly protruding protrusion is integrally formed in the middle of the upper surface of the cutting tooth body;

[0006] The top of the protrusion is provided with a hexagonal cavity, and a circular through hole is provided at the center of the hexagonal cavity along the thickness direction of the blade body.

[0007] The two sides of the blade body are inclined surfaces that extend outward from the top to the bottom.

[0008] Preferably, the top view of the cutting tooth body is elongated, and the two ends of the elongated shape are provided with rounded corner structures; the cutting protrusion is located above the front end of the elongated shape.

[0009] Preferably, the inner wall of the hexagonal cavity is a hexagonal prism surface, and the inner wall of the circular through hole is a cylindrical surface; the depth of the hexagonal cavity is less than the height of the protrusion.

[0010] Preferably, the bottom contour of the blade body is a downwardly convex arc-shaped surface.

[0011] Preferably, the two cutting protrusions are arranged at an angle, and the outer surface of the protrusions is an inclined surface that smoothly connects with the inclined surfaces on both sides of the cutter tooth body.

[0012] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0013] To address the problems of concentrated cutting force leading to rapid localized wear, insufficient structural strength resulting in easy deformation, and large surface friction area exacerbating wear in existing wood chip cutting tools, this device addresses these issues through: ① The cutting protrusion at the front end of the cutting tool body is angled, with its outer surface smoothly connected to the inclined surfaces on both sides of the body, optimizing the force direction during cutting and dispersing the cutting impact force to reduce localized wear; ② The hexagonal cavity at the top of the protrusion and the central circular through hole form a nested structure, utilizing geometric contours to disperse stress and improve the structural strength of the cutting tool body; ③ The inclined surfaces on both sides, the arc-shaped surface at the bottom, and the elongated rounded corner contour of the cutting tool body reduce the contact friction area with wood chips and avoid edge stress concentration. These three dimensions—optimized cutting force, dispersed structural stress, and designed friction surface morphology—synergistically solve the problems of poor wear resistance and insufficient structural stability of existing cutting tools.

[0014] 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

[0015] Figure 1 This is a three-dimensional schematic diagram of a wear-resistant wood chipper tooth according to the present invention;

[0016] Figure 2 This is a top view of a wear-resistant wood chipper tooth according to the present invention;

[0017] Figure 3 This is a cross-sectional view of a wear-resistant wood chipper tooth according to the present invention.

[0018] As shown in the figure:

[0019] 1. Cutting tooth body; 2. Cutting protrusion; 3. Protrusion; 4. Hexagonal cavity; 5. Circular through hole; 6. Inclined surface; Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] like Figure 1 and Figure 2 As shown, a wear-resistant wood chipper includes a chipper body 1. The chipper body 1 has a long strip shape in top view and rounded corners at both ends. The bottom outline is a downwardly convex arc surface. A protruding part 3 is integrally formed in the middle of the upper surface of the chipper body 1. A hexagonal cavity 4 is opened at the top of the protruding part 3. Its inner wall is a hexagonal prism surface. A circular through hole 5 penetrates the inner wall of the cylindrical surface along the thickness direction of the chipper body 1 in the center of the hexagonal cavity 4. The depth of the hexagonal cavity 4 is less than the height of the protruding part 3.

[0024] In this embodiment, the elongated outline of the blade body 1 and the rounded corners at both ends are adapted to the installation space, and the arc-shaped bottom surface reduces contact friction with materials; the protrusion 3 is integrally formed with the body to enhance structural strength, the hexagonal cavity 4 and the circular through hole 5 disperse stress, and the combination of the hexagonal prism surface and the cylindrical surface improves the stability under stress and jointly enhances wear resistance.

[0025] like Figure 2 and Figure 3 As shown, the upper front end of the cutter body 1 is provided with two symmetrically distributed cutting protrusions 2. The cutting protrusions 2 are located above the elongated front end and are set at an angle. The outer surface of the cutting protrusions 2 is an inclined surface 6, which is smoothly connected with the inclined surfaces 6 on both sides of the cutter body 1 that extend from the top to the bottom outwards.

[0026] In this embodiment, two symmetrically distributed cutting protrusions 2 can disperse the cutting force and avoid the force concentration on a single cutting part; the oblique setting is adapted to the wood cutting angle to improve cutting efficiency; the inclined surface 6 on the outer surface is smoothly connected to the inclined surfaces 6 on both sides of the body to reduce the resistance and friction during cutting, reduce the wear rate, and enhance the wear resistance.

[0027] When in use, this device needs to be connected to the rotating shaft of the wood chipper through the circular through hole on the blade body. The rotating shaft passes through the circular through hole and is fixed by a nut. The blade body and cutting protrusion can be made of high manganese steel, and the protrusion can be made of tungsten carbide alloy. It can achieve high-speed rotational cutting with the help of existing equipment. The combination of materials and structure further improves the wear resistance.

[0028] Specifically, before installing this device, the rotating shaft of the wood chipper must be cleaned and its surface flatness checked. Then, the blade body is inserted into the preset position of the rotating shaft through the circular through hole, ensuring that the cutting protrusion faces the feeding direction of the chipper. Then, nuts that are compatible with the rotating shaft are tightened on both sides of the circular through hole, and the nuts fit against the inner wall of the hexagonal cavity to enhance the stability of the fixation. During operation, the drive motor of the wood chipper is started. The drive motor drives the rotating shaft to rotate at high speed through the transmission gear set. The blade body rotates synchronously with the rotating shaft. After the wood raw material enters from the feed port, it first contacts the obliquely set cutting protrusion. Under the guidance of the inclined surface, it is quickly cut and crushed. The crushed material is discharged outward along the inclined surfaces on both sides of the blade body. Throughout the process, the rotation speed of the rotating shaft can be adjusted by the control system of the chipper according to the hardness of the wood.

[0029] 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 wear-resistant wood chipper tooth, comprising a tooth body (1), characterized in that: The front end of the cutter body (1) is provided with two symmetrically distributed cutting protrusions (2), and the upper surface of the cutter body (1) is integrally formed with an upward protrusion (3). The top of the protrusion (3) is provided with a hexagonal cavity (4), and a circular through hole (5) is provided at the center of the hexagonal cavity (4) along the thickness direction of the blade body (1). The two sides of the blade body (1) are inclined surfaces (6) that extend outward from the top to the bottom.

2. The wear-resistant wood chipper teeth according to claim 1, characterized in that, The top view of the blade body (1) is elongated, and the two ends of the elongated shape are provided with rounded corner structures; the cutting protrusion (2) is located above the front end of the elongated shape.

3. The wear-resistant wood chipper teeth according to claim 1, characterized in that, The inner wall of the hexagonal cavity (4) is a hexagonal prism surface, and the inner wall of the circular through hole (5) is a cylindrical surface; the depth of the hexagonal cavity (4) is less than the height of the protrusion (3).

4. The wear-resistant wood chipper teeth according to claim 1, characterized in that, The bottom profile of the blade body (1) is a downwardly convex arc surface.

5. The wear-resistant wood chipper teeth according to claim 2, characterized in that, The two cutting protrusions (2) are arranged at an angle, and the outer surface of the protrusion is an inclined surface (6), which is smoothly connected to the inclined surfaces (6) on both sides of the tooth body (1).

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