CN206454758U - Combined Serrated Knife - Google Patents

Abstract

A combined serrated knife comprises a circular serrated knife body and a plurality of blade teeth evenly installed on the outer periphery of the serrated knife body; a positioning hole is provided in the middle of the serrated knife body; a plurality of positioning posts and a plurality of positioning grooves are provided on the periphery of the serrated knife body, the positioning posts and the positioning grooves are arranged alternately, and a first threaded hole is provided at the position of the serrated knife body corresponding to the positioning groove; the side surface of the blade teeth comprises an arc surface, a first rectangular surface, a second rectangular surface, a third rectangular surface and a fourth rectangular surface, and a second threaded hole is provided on the first rectangular surface; the blade teeth are made of cemented carbide material. The combined serrated knife can greatly extend the service life of the blade teeth, reduce the time for replacing the blade teeth, save production costs, and improve work efficiency.

Description

Combined Serrated Knife

technical field

The utility model relates to the technical field of electric tool accessories, in particular to a combined serrated knife for paper industry processing.

Background technique

At present, most of the tools used for crushing paper materials use serrated knives, and the commonly used ones are surface-welded knives and integral knives. If the integral cutter teeth are worn out, the entire cutter disk can only be replaced as a whole, or repaired by surfacing welding. This method is costly, time-consuming, and requires high requirements for operators.

At the same time, the material of the teeth of the existing saw blade is superhard alloy teeth, the cutting efficiency is low, the teeth wear out quickly, and the service life is short.

Utility model content

Based on this, it is necessary to provide a combined serrated knife with fast cutting speed and long service life to solve the above problems.

A combined serrated knife, comprising a circular serrated knife body and a number of teeth evenly installed on the outer periphery of the serrated knife body; a positioning hole is provided in the middle of the serrated knife body; the peripheral part of the serrated knife body A number of positioning columns and a number of positioning grooves are provided, the positioning columns and the positioning grooves are arranged alternately, the position of the serrated knife body corresponding to the positioning grooves is provided with a first threaded hole; the side surface of the knife tooth includes an arc surface , a first rectangular surface, a second rectangular surface, a third rectangular surface and a fourth rectangular surface, the first rectangular surface is provided with a second threaded hole, the other side of the third rectangular surface is opposite to the The intersecting contact of one side of the fourth rectangular surface is provided with a step-shaped gap; the knife tooth is made of hard alloy material; one side of the first rectangular surface and the second rectangular surface One side intersects and contacts, and the opposite side of the second rectangular surface intersects and contacts one side of the third rectangular surface to form a mountain-shaped peripheral cutting edge.

The combined sawtooth knife of the utility model installs the knife teeth on the sawtooth knife body by means of screwing. When one of the knife teeth is worn out, the worn knife tooth can be disassembled and replaced with a new knife tooth to continue to use; The teeth are made of hard alloy material. Hard alloy has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, which can greatly prolong the service life of the cutter teeth and reduce the cost of replacing the cutter teeth. time, saving production costs and improving work efficiency.

In one of the embodiments, the position of the first threaded hole matches the position of the second threaded hole.

In one of the embodiments, an anti-rust layer is provided in the second threaded hole where the screw is installed.

In one of the embodiments, the position and size of the notch are respectively matched with the position and size of the positioning post.

In one of the embodiments, one side of the first rectangular surface intersects and contacts one side of the second rectangular surface at an angle of 150 degrees.

In one of the embodiments, the positioning holes are arranged in a hexagonal shape.

In one of the embodiments, the serrated knife body and the positioning column are integrated.

In one of the embodiments, there is an anti-rust layer on the serrated knife body and the positioning post.

Description of drawings

Fig. 1 is the three-dimensional schematic view of the combined serrated knife of a preferred embodiment of the present invention;

Fig. 2 is an exploded perspective view of the combined serrated knife of Fig. 1;

Fig. 3 is an enlarged view at A of the combined serrated knife in Fig. 2 .

The meanings of each label in the accompanying drawings are:

10-serrated knife body, 11-positioning hole, 12-positioning column, 13-positioning groove, 14-first threaded hole;

20-cutter tooth, 21-arc surface, 22-the first rectangular surface, 23-the second rectangular surface, 24-the third rectangular surface, 25-the fourth rectangular surface, 26-the second threaded hole, 27-notch.

detailed description

In order to facilitate understanding of the utility model, the utility model will be described more fully below. However, the invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present utility model more thorough and comprehensive.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of this invention. The terminology used in the description of the utility model herein is only for the purpose of describing specific embodiments, and is not intended to limit the utility model.

Please refer to FIG. 1 to FIG. 3 , which is a combined serrated knife according to a preferred embodiment of the present invention, which includes a circular serrated knife body 10 and several teeth 20 evenly installed on the outer periphery of the serrated knife body 10 . The middle part of the serrated knife body 10 is provided with a positioning hole 11; the peripheral part of the serrated knife body 10 is provided with several positioning columns 12 and some positioning grooves 13, and the positioning columns 12 and the positioning grooves 13 are arranged alternately, and the said serrated knife body 10 corresponds to the positioning grooves 13 The position is provided with a first threaded hole 14 . The positioning hole 11 is arranged in a hexagonal shape, and the combined serrated knife is installed on the cutting device through the positioning hole 11; compared with the existing circular positioning hole, the hexagonal positioning hole of the serrated knife body 10 of the present invention 11 can better ensure the working stability of the combined serrated knife, that is, it can make the combined serrated knife difficult to slip under the condition of high-speed rotation.

The side surface of the knife tooth 20 includes a circular arc surface 21 , a first rectangular surface 22 , a second rectangular surface 23 , a third rectangular surface 24 and a fourth rectangular surface 25 . Wherein, the arc surface 21, the first rectangular surface 22, the second rectangular surface 23, and the third rectangular surface 24 are sequentially connected; One side of 24 intersects and contacts, and the opposite side of the arc surface 21 intersects and contacts one side of the first rectangular surface 22, and the arc surface 21 is tangent to the first rectangular surface 22; on the first rectangular surface 22 There is a second threaded hole 26, the second threaded hole position 26 is perpendicular to the first rectangular surface 22, the position of the second threaded hole 26 matches the position of the first threaded hole 14, and the threaded nail passes through the second threaded hole 26 and the first threaded hole 14 Screw and fix the knife teeth 20 on the positioning groove 13 of the serrated knife body 10, the threaded nail is located in the second threaded hole 26, and an anti-rust layer is arranged in the second threaded hole 26 where the threaded nail is installed. The opposite side of the first rectangular surface 22 is intersected with one side of the second rectangular surface 23 at an angle of 150 degrees; the other side of the second rectangular surface 23 is opposite to one side of the third rectangular surface 24 The intersecting contact constitutes the peripheral cutting edge in the shape of a mountain peak. The opposite side of the third rectangular surface 24 and the intersection of one side of the fourth rectangular surface 25 are provided with a stepped notch 27, and the position and size of the notch 27 are matched with the position and size of the positioning column 12 respectively. The arc surface 21 , the first rectangular surface 22 and the third rectangular surface 24 of the adjacent cutter tooth 20 form a cutting groove, which is beneficial to chip removal. By setting the threaded nail in the second threaded hole 26 holes, the threaded nail will not affect the operation of the serrated knife; the second threaded hole 26 where the threaded nail is installed is provided with an anti-rust layer to prolong the service life of the threaded nail , Reduce the safety hazards caused by screw damage.

The cutter tooth 20 is made of cemented carbide material. The cemented carbide has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance. Compared with the traditional superhard alloy, it can greatly extend the The service life of the tooth 20 is shortened, the time for replacing the tooth 20 is reduced, the production cost is saved, and the working efficiency is improved.

The serrated knife body 10 and the positioning post 12 are integrally arranged. There is an anti-rust layer on the serrated knife body 10 and the positioning post 12, which can prevent the saw blade from rusting when it is not used for a long time, and prolong the service life.

The combined sawtooth knife of the utility model installs the knife teeth on the sawtooth knife body by means of screwing. When one of the knife teeth is worn out, the worn knife tooth can be disassembled and replaced with a new knife tooth to continue to use; There is an anti-rust layer in the second threaded hole of the threaded nail, which prolongs the service life of the threaded nail and reduces the safety hazard caused by the damage of the threaded nail; the knife teeth are made of hard alloy material, and hard alloy has high hardness. , Wear resistance, good strength and toughness, heat resistance, corrosion resistance and a series of excellent properties can greatly extend the service life of the cutter teeth, reduce the time for replacing the cutter teeth, save production costs, and improve work efficiency.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the utility model, and the description thereof is relatively specific and detailed, but it should not be understood as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (8)

1. A combined serrated knife is characterized in that it comprises a circular serrated knife body and several teeth evenly installed on the outer periphery of the serrated knife body; the middle part of the serrated knife body is provided with a positioning hole; the The peripheral part of the serrated knife body is provided with some positioning columns and some positioning grooves, the positioning columns and the positioning grooves are arranged alternately, and the position corresponding to the positioning grooves of the serrated knife body is provided with a first threaded hole; The side surface includes an arc surface, a first rectangular surface, a second rectangular surface, a third rectangular surface and a fourth rectangular surface, the first rectangular surface is provided with a second threaded hole, and the third rectangular surface is opposite to the other A stepped notch is provided at the intersection and contact between one side and one side of the fourth rectangular surface; the knife teeth are made of hard alloy material; one side of the first rectangular surface is connected to the fourth rectangular surface. One side of the second rectangular surface intersects and contacts, and the opposite side of the second rectangular surface intersects and contacts one side of the third rectangular surface to form a mountain-shaped peripheral cutting edge. 2. The combined serrated knife according to claim 1, wherein the position of the first threaded hole matches the position of the second threaded hole. 3. The combined serrated knife according to claim 2, characterized in that: an anti-rust layer is provided in the second threaded hole where the threaded nail is installed. 4. The combined serrated knife according to claim 1, wherein the position and size of the notch match the position and size of the positioning post respectively. 5 . The combined serrated knife according to claim 1 , wherein one side of the first rectangular surface intersects with one side of the second rectangular surface at an angle of 150 degrees. 6. The combined serrated knife according to claim 1, wherein the positioning holes are arranged in a hexagonal shape. 7. The combined serrated knife according to claim 1, characterized in that: the serrated knife body and the positioning column are integrated. 8. The combined serrated knife according to claim 7, characterized in that: the serrated knife body and the positioning post have an anti-rust layer.