Cutter tooth applied to shredding machine

Abstract

The cutter tooth comprises a cutter head, a plurality of cutter teeth are arranged on the outer edge of the cutter head at equal intervals in a surrounding mode, a plurality of assembling grooves are formed in the outer edge of one face of the cutter head at equal intervals in a surrounding mode, and a notch is formed in one face of the end of each cutter tooth through cutting correspondingly. The cutter is divided into the cutter head and the cutter teeth, when regular replacement is needed, only the damaged cutter teeth need to be replaced, and the whole cutter does not need to be detached, so that friction between the cutter and the connecting shaft of the shredding machine is reduced, and abrasion of the connecting shaft caused by friction during assembly between the cutter and the connecting shaft is reduced; therefore, when the cutter and the connecting shaft are assembled, due to the fact that the contact area is larger, the cutter has better stability, and the situation that a traditional cutter inclines after a circular connecting hole and a cylindrical connecting shaft are assembled or the cutter rotates on the connecting shaft due to the fact that the abutting force is too large due to the fact that the hardness of materials is too high in the working process is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of shredders, in particular to a knife tooth used for shredders. Background Art

[0002] Shredders are generally used to crush unprocessed raw materials or scraps. During use, the blade teeth directly act on the material. When processing strip metal materials such as scrap steel bars, they are easily damaged and have a short service life, so they need to be replaced regularly.

[0003] Chinese patent CN114515639A discloses a rolling-cut steel bar shredding tool. The horizontal cross-section of the axial direction of the knife shaft is designed to be a trapezoidal-shaped knife tooth. Compared with the radial or circumferential trapezoidal-shaped knife teeth, when shredding steel bars, the axially trapezoidal-shaped knife teeth can achieve the effect of buffered shearing and shredding in specific applications, avoiding direct and hard shearing, thereby increasing the service life of the knife teeth. The tooth directions of the trapezoidal-shaped knife teeth of the blades on different knife shafts are in the same direction, back-to-back direction, or opposite direction. Different tooth directions are selected for installation according to materials of different specifications, and the versatility is strong.

[0004] Since there is a certain amount of friction between the connecting hole of the cutter and the connecting shaft of the shredder, after replacing the cutter many times, the connecting shaft will be worn to a certain extent, which will cause the connection between the connecting shaft and the new cutter to be unstable or incompatible. Summary of the invention

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A knife tooth used in a shredder comprises a knife disc, a plurality of knife teeth are arranged equidistantly in a surrounding manner on the outer edge of the knife disc, a plurality of assembly grooves are opened equidistantly in a surrounding manner on the outer edge of one side of the knife disc, and a notch is formed by cutting on the end side of the corresponding knife tooth, wherein the cutting depth of the notch is less than the thickness of the knife tooth to form a connecting piece, and when the knife tooth is fitted in the assembly groove through the connecting piece, the other side of the knife tooth is flush with the other side of the knife disc, and a mortise and tenon structure is provided to fix the flush surface.

[0007] The mortise and tenon structure includes a first dovetail groove, a second dovetail groove and a double-tail dovetail tenon, wherein the first dovetail groove is arranged on the blade tooth, the second dovetail groove is arranged on the blade tooth, and when the first dovetail groove is aligned with the second dovetail groove, the double-tail dovetail tenon is embedded in the groove cavity formed by the two.

[0008] The first dovetail grooves and the second dovetail grooves are arranged in groups of two, and a total of multiple groups are provided. The first dovetail grooves and the second dovetail grooves in the same group are arranged alternately, and the first dovetail grooves and the second dovetail grooves are arranged obliquely.

[0009] The first dovetail groove has the same structure as the second dovetail groove. The front section of the first dovetail groove is a rectangular groove body, and the end of the rectangular groove body is connected to an isosceles groove in the shape of an isosceles trapezoidal structure.

[0010] The assembly groove is symmetrically provided with fixing holes, and the connecting piece is symmetrically penetrated with screws, and the cutter teeth are fixed on the cutter disc by connecting the screws with the fixing holes.

[0011] A connecting hole which can be sleeved with the internal rotating shaft of the shredder is opened at the center of the knife disc, and the connecting hole is a regular polygon structure.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The cutter in the present application is divided into a cutter disc and cutter teeth, so that when the cutter directly acts on the material, it is easy to be damaged when processing strip metal materials such as scrap steel bars. When it needs to be replaced regularly, only the damaged cutter teeth need to be replaced, and there is no need to remove the entire cutter, thereby reducing the friction between the cutter and the connecting shaft of the shredder, and reducing the wear of the connecting shaft caused by the friction between the two during assembly.

[0014] Furthermore, the present application improves the connecting hole of the tool into a regular polygonal structure, so that when the tool is assembled with the connecting shaft, the contact area is larger, and the tool has better stability. Unlike traditional tools that use a circular connecting hole and a cylindrical connecting shaft, the tool will not tilt after being assembled, or the tool will not rotate on the connecting shaft due to excessive resistance caused by excessive material hardness during operation.

[0015] The connection between the blade disc and the blade teeth of the present application adopts a mortise and tenon structure and screws for installation, wherein the installation point of the screw on the blade disc is provided with an assembly groove, and a connecting piece is formed on the blade teeth by cutting. The contact surface between the blade disc and the blade teeth is made larger by the fitting of the connecting piece and the assembly groove, thereby making the connection between the two more stable. A double-tail dovetail tenon is embedded in a dovetail groove on the other side of the blade disc and the blade teeth. Its unique groove structure makes the connection surface more stable and reliable and not easy to loosen. Compared with traditional connection methods such as screws or nails, its connection effect is more durable. The appearance design of the dovetail groove is usually simple and the lines are smooth. It not only meets the aesthetic requirements of modern people for beauty, but also can be better matched with other materials to enhance the overall decorative effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the front surface structure of the tool.

[0017] Figure 2 Schematic diagram of the rear surface structure of the tool.

[0018] Figure 3 Schematic diagram of the front surface structure of the cutter disc.

[0019] Figure 4 Schematic diagram of the rear surface structure of the cutter disc.

[0020] Figure 5 Schematic diagram of the blade tooth structure.

[0021] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0022] 100, cutter disc; 100a, connecting hole; 100b, assembly groove; 100b-1, fixing hole; 100c, first dovetail groove; 101, cutter tooth; 101a, connecting piece; 101a-1, screw; 101b, second dovetail groove; 102, double-tail dovetail tenon. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0026] See also Figure 1-5A knife tooth for a shredder comprises a knife disc 100, and a plurality of knife teeth 101 are arranged at equal intervals in a surrounding manner on the outer edge of the knife disc 100. The knife disc 100 and the knife teeth 101 are assembled into a complete knife tool suitable for a shredder. The knife tool is divided into the knife disc 100 and the knife teeth 101 so that the entire knife tool does not need to be removed, thereby reducing the friction between the knife and the connecting shaft of the shredder, and reducing the wear of the connecting shaft caused by the friction between the two during assembly. In order to make the connection between the knife disc 100 and the knife teeth 101 more stable, a plurality of assembly grooves 100b are arranged at equal intervals in a surrounding manner on the outer edge of one side of the knife disc 100, and a notch is formed by cutting on one end side of the knife teeth 101, and the cutting depth of the notch is less than that of the knife teeth. The thickness of 101 forms a connecting piece 101a, and through the fitting of the connecting piece 101a and the assembly groove 100b, the contact surface between the cutter disc 100 and the blade tooth 101 is made larger, so that the connection between the two is made more stable, and the assembly groove 100b also has a restraining effect on the connecting piece 101a, preventing the blade tooth 101 from shaking when it is resisted. When the blade tooth 101 is fitted in the assembly groove 100b through the connecting piece 101a, the other side of the blade tooth 101 is flush with the other side of the cutter disc 100, and a mortise and tenon structure is provided to fix the surface. The mortise and tenon structure has strong stability and durability, and can connect the various parts tightly together, effectively avoiding the problems of looseness and breakage in modern mechanical processing.

[0027] exist Figure 2-5 In the embodiment, the mortise and tenon structure includes a first dovetail groove 100c, a second dovetail groove 101b and a double-tail dovetail tenon 102. The first dovetail groove 100c and the second dovetail groove 101b have the same structure, wherein the first dovetail groove 100c is provided on the blade tooth 101, and the second dovetail groove 101b is provided on the blade tooth 101. When the first dovetail groove 100c and the second dovetail groove 101b are aligned, the double-tail dovetail tenon 102 is embedded in the groove cavity formed by the two. The unique groove structure of the first dovetail groove 100c and the double-tail dovetail tenon 102 makes the connection surface more stable and reliable and not easy to loosen. Compared with traditional connection methods such as screws or nails, its connection effect is more durable, and its appearance design is usually simple with smooth lines. Furthermore, in order to ensure uniform force distribution and strengthen the connection between the cutter disc 100 and the cutter tooth 101, the first dovetail groove 100c and the second dovetail groove 101b are designed to be two in a group, with a total of multiple groups. The first dovetail groove 100c and the second dovetail groove 101b in the same group are staggered. At the same time, in order to achieve a better fitting effect, the first dovetail groove 100c and the second dovetail groove 101b are both inclined. The specific structure of the first dovetail groove 100c and the second dovetail groove 101b is that the front section is a rectangular groove body, and the end of the rectangular groove body is connected to an isosceles groove in the shape of an isosceles trapezoidal structure.

[0028] exist Figure 3In the embodiment, fixing holes 100b - 1 are symmetrically provided on the assembly groove 100b , and screws 101a - 1 are symmetrically provided through the connecting piece 101a , and the cutter teeth 101 are fixed on the cutter disc 100 by connecting the screws 101a - 1 with the fixing holes 100b - 1 .

[0029] exist Figure 1-5 In the invention, a connection hole 100a which can be connected with the internal rotating shaft of the shredder is opened at the center of the cutter disc 100, and the connection hole 100a is a regular polygonal structure, so that when the cutter and the connecting shaft are assembled, the contact area is larger, and the cutter has better stability. Unlike traditional cutters which use a circular connection hole and a cylindrical connecting shaft, the cutter will not tilt after being assembled, or the cutter will not rotate on the connecting shaft due to excessive resistance caused by excessive hardness of the material during operation.

[0030] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A knife tooth for a shredder, comprising a knife disc (100), a plurality of knife teeth (101) being arranged at equal intervals in a surrounding manner on the outer edge of the knife disc (100), Features: A plurality of assembly grooves (100b) are circumferentially and equidistantly provided on the outer edge of one side of the cutter disc (100); a notch is correspondingly formed on one side of the end of the cutter tooth (101) by cutting, and the cutting depth of the notch is less than the thickness of the cutter tooth (101) to form a connecting piece (101a); when the cutter tooth (101) is fitted into the assembly groove (100b) through the connecting piece (101a), the other side of the cutter tooth (101) is flush with the other side of the cutter disc (100), and a mortise and tenon structure is provided to fix the flush surfaces.

2. The blade used for a shredder according to claim 1, characterized in that: The mortise and tenon structure comprises a first dovetail groove (100c), a second dovetail groove (101b), and a double-tail dovetail tenon (102), wherein the first dovetail groove (100c) is provided on the blade tooth (101), and the second dovetail groove (101b) is provided on the blade tooth (101), and when the first dovetail groove (100c) and the second dovetail groove (101b) are aligned, the double-tail dovetail tenon (102) is embedded in a groove cavity formed by the two.

3. The blade used for a shredder according to claim 2, characterized in that: The first dovetail grooves (100c) and the second dovetail grooves (101b) are arranged in groups of two, with a total of multiple groups. The first dovetail grooves (100c) and the second dovetail grooves (101b) in the same group are arranged alternately, and the first dovetail grooves (100c) and the second dovetail grooves (101b) are arranged obliquely.

4. The blade used for a shredder according to claim 3, characterized in that: The first dovetail groove (100c) has the same structure as the second dovetail groove (101b); the front section of the first dovetail groove (100c) is a rectangular groove body, and the end of the rectangular groove body is connected to an isosceles groove in the shape of an isosceles trapezoidal structure.

5. The blade teeth for shredder according to claim 1, characterized in that: Fixing holes (100b-1) are symmetrically provided on the assembly groove (100b), screws (101a-1) are symmetrically penetrated on the connecting piece (101a), and the screws (101a-1) are connected to the fixing holes (100b-1) so that the blade teeth (101) are fixed on the blade disc (100).

6. The blade teeth for shredder according to claim 1, characterized in that: A connection hole (100a) capable of being sleeved with a rotating shaft inside the shredder is provided at the center of the knife disc (100), and the connection hole (100a) is a regular polygonal structure.

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