Double-edge rotary knife

Abstract

The utility model relates to a double-edge rotary knife which comprises a first connecting end, a knife body unit and a second connecting end, and the first connecting end and the second connecting end are located at the two ends of the knife body unit. Each cutter body unit comprises a cutter body and two cutting edges, the cutting edges and the cutter body are of an integrally-formed structure, the two cutting edges are located on the two sides of the cutter body respectively and are in central symmetry about the central axis of the cutter body, and the outer edges of the cutting edges are distributed in a cylindrical spiral line shape with the central axis of the cutter body as the center. The two cutting edges are arranged on the two sides of the cutter body, two times of cutting can be achieved by rotating the cutter body by a circle, and the cutting efficiency can be effectively improved during high-frequency use; the first connecting end and the second connecting end are detachably connected with the cutter body unit, so that the connecting adaptability of the cutter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cutter tools, in particular to a double-edged rotary cutter. Background Art

[0002] Receipt printers are used at supermarket checkouts, number-taking counters in public service halls, and ATMs. Inside the receipt printer, the roll of paper is usually unrolled and printed before being output from the exit. Since older receipt printers do not have an automatic paper cutting function, tearing the receipt usually results in uneven torn edges.

[0003] At present, most new receipt printers have automatic paper cutting functions, but the paper cutting tools inside them are different. The main ones are rotary cutters for rolling cutting. Since the existing rotary cutters have only one blade on the circumference, the cutter rotates once a circle when cutting paper, which results in low paper cutting efficiency. In addition, due to different brands and models of existing receipt printers, the installation joints of the cutters are different, and the connection adaptability of the cutters is poor when replacing the cutters.

[0004] Therefore, a double-edged rotary cutter is needed to solve the above-mentioned technical problems. Utility Model Content

[0005] The utility model aims at solving the technical problems existing in the prior art and provides a double-edged rotary cutter.

[0006] The utility model solves the above technical problems with the following technical solutions: A double-edged rotary cutter comprises a first connecting end, a cutter body unit, and a second connecting end, wherein the first connecting end and the second connecting end are located at two ends of the cutter body unit;

[0007] The blade unit includes a blade body and two blades. The blades and the blade body are an integrally formed structure. The two blades are respectively located on both sides of the blade body, and the two blades are symmetrical about the central axis of the blade body. The outer edges of the blades are distributed in a cylindrical spiral shape with the central axis of the blade body as the center.

[0008] Preferably, in the above-mentioned double-edged rotary knife, both ends of the knife body are provided with hand guard end plates, and the two hand guard end plates are parallel to each other.

[0009] Preferably, in the above-mentioned double-edged rotary knife, the two hand guard end plates are provided with a torsion protrusion on the sides away from each other, and the first connecting end and the second connecting end are provided with a slot on the sides close to each other, and the torsion protrusion is adapted to the slot and embedded in the slot.

[0010] Preferably, in the above-mentioned double-edged rotary cutter, the central axis of the twisting protrusion coincides with the central axis of the cutter body.

[0011] Preferably, in the above-mentioned double-edged rotary cutter, the twisting protrusion is in the shape of a triangular prism.

[0012] Preferably, in the above-mentioned double-edged rotary cutter, the twisting protrusion is in the shape of a quadrangular prism or a hexagonal prism.

[0013] Preferably, in the above-mentioned double-edged rotary cutter, the three side surfaces of the torsion protrusion are provided with cylindrical grooves, the side surfaces of the first connecting end and the second connecting end are provided with three threaded holes, the threaded holes penetrate and are connected to the card slot, the threaded holes correspond one-to-one to the cylindrical grooves, and machine screws are installed in the threaded holes, and the front end of the machine screws is inserted into the cylindrical grooves.

[0014] Preferably, in the above-mentioned double-edged rotary cutter, a cavity is axially penetrated inside the cutter body.

[0015] Preferably, in the above-mentioned double-edged rotary cutter, the cavity is filled with cooling liquid.

[0016] Preferably, in the above-mentioned double-edged rotary cutter, a circular hole is arranged on the end surface of the twisting protrusion, the circular hole is communicated with the cavity, and a sealing plug is installed on the circular hole.

[0017] The beneficial effects of the utility model are:

[0018] 1. The utility model provides two blades on both sides of the knife body, so that the knife body can achieve two cuts when it rotates one circle, which can effectively improve the cutting efficiency when used at a high frequency;

[0019] 2. The utility model improves the connection adaptability of the tool by detachably connecting the first connection end, the second connection end and the tool body unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the utility model;

[0021] Figure 2 It is a front view of the utility model;

[0022] Figure 3 for Figure 2 Sectional view at A-A in the middle;

[0023] Figure 4 It is an exploded view of the utility model;

[0024] Figure 5 for Figure 4 A partial enlarged view of point B in the middle.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1. First connecting end, 2. Blade unit, 21. Blade, 22. Blade, 23. Cavity, 24. Hand guard end plate, 25. Twist-off protrusion, 26. Round hole, 27. Threaded hole, 28. Cylindrical groove, 3. Second connecting end, 4. Card slot. DETAILED DESCRIPTION

[0027] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0028] like Figure 1 - Figure 5 As shown, a double-edged rotary cutter comprises a first connection end 1, a cutter body unit 2, and a second connection end 3, wherein the first connection end 1 and the second connection end 3 are located at both ends of the cutter body unit 2. The first connection end 1 and the second connection end 3 are respectively used to connect to the inside of the device, and the first connection end 1 and the second connection end 3 are detachably connected to the cutter body unit 2.

[0029] The blade unit 2 includes a blade 21 and two blades 22, and the blades 22 and the blade 21 are an integrally formed structure. The two blades 22 are respectively located on both sides of the blade 21, and the two blades 22 are symmetrical about the center axis of the blade 21. The outer edge of the blade 22 is distributed in a cylindrical spiral line with the center axis of the blade 21 as the center, that is, similar to the blade distribution of a twist drill, but the spiral twist of the blade 22 in the utility model is smaller. When cutting paper, the paper is fixed, the center axis position of the blade 21 remains unchanged, and the blade 21 rotates around its center axis. When the blade 22 contacts the paper, the paper will be cut. Since the blade 22 is in point contact with the paper when rotating, that is, the tangent point of a virtual circle with a radius from the contact point to the center axis, the cutting resistance of the tool as a whole is small, and since each cutting contact point is located on a straight line parallel to the center axis of the blade, the cut line is a straight line.

[0030] Both ends of the blade body 21 are provided with hand guard end plates 24, and the two hand guard end plates 24 are parallel to each other. The two hand guard end plates 24 are provided with a torsion protrusion 25 on the side away from each other. The first connecting end 1 and the second connecting end 3 are provided with a clamping groove 4 on the side close to each other, and the torsion protrusion 25 is adapted to the clamping groove 4. After installation, the torsion protrusion 25 is embedded in the clamping groove 4. The central axis of the torsion protrusion 25 coincides with the central axis of the blade body 21. The torsion protrusion 25 is in the shape of a triangular prism, a quadrangular prism or a hexagonal prism, preferably a triangular prism, so as to reduce the number of threaded holes and cylindrical grooves in the following text.

[0031] In order to fix the torsion projection 25 in the cylindrical groove 28, cylindrical grooves 28 are provided on the three sides of the torsion projection 25, and three threaded holes 27 are provided on the sides of the first connection end 1 and the second connection end 3. The threaded holes 27 penetrate and connect to the card slot 4, and the threaded holes 27 correspond to the cylindrical grooves 28 one by one. By installing a machine screw in the threaded hole 27 and inserting the front end of the machine screw into the cylindrical groove 28, the first connection end 1 and the second connection end 3 are fixedly connected to the cutter unit 2. When the cutter unit 2 needs to be replaced, the machine screw is taken out, and the first connection end 1 and the second connection end 3 can be removed. After replacing the new cutter unit 2, the machine screw can be tightened.

[0032] The inside of the blade body 21 is provided with a cavity 23 axially through it for weight reduction. At the same time, a coolant can be filled in the cavity 23 to prevent the blade from heating up during the cutting process. A circular hole 26 is provided on the end surface of the torsion projection 25, and the circular hole 26 is connected to the cavity 23. A sealing plug is installed on the circular hole 26 to facilitate the addition and replacement of the coolant.

[0033] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. 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 utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present utility model. In addition, "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A double-edged rotary cutter, characterized in that: It comprises a first connecting end (1), a blade unit (2), and a second connecting end (3), wherein the first connecting end (1) and the second connecting end (3) are located at two ends of the blade unit (2); The blade unit (2) comprises a blade (21) and two blades (22); the blades (22) and the blade (21) are an integrally formed structure; the two blades (22) are respectively located on two sides of the blade (21), and the two blades (22) are centrally symmetrical about the central axis of the blade (21); and the outer edges of the blades (22) are distributed in a cylindrical spiral shape with the central axis of the blade (21) as the center.

2. The double-edged rotary cutter according to claim 1, characterized in that: Both ends of the blade body (21) are provided with hand guard end plates (24), and the two hand guard end plates (24) are parallel to each other.

3. The double-edged rotary cutter according to claim 2, characterized in that: A torsion protrusion (25) is provided on the sides of the two hand guard end plates (24) that are away from each other, and a clamping groove (4) is provided on the sides of the first connecting end (1) and the second connecting end (3) that are close to each other, and the torsion protrusion (25) is matched with the clamping groove (4), and the torsion protrusion (25) is embedded in the clamping groove (4).

4. The double-edged rotary cutter according to claim 3, characterized in that: The central axis of the torsion projection (25) coincides with the central axis of the knife body (21).

5. The double-edged rotary cutter according to claim 4, characterized in that: The twisting protrusion (25) is in the shape of a triangular prism.

6. The double-edged rotary cutter according to claim 4, characterized in that: The twisting protrusion (25) is in the shape of a quadrangular prism or a hexagonal prism.

7. The double-edged rotary cutter according to claim 5, characterized in that: The three side surfaces of the torsion protrusion (25) are provided with cylindrical grooves (28), and the side surfaces of the first connecting end (1) and the second connecting end (3) are provided with three threaded holes (27), the threaded holes (27) penetrate and are connected to the card slot (4), the threaded holes (27) correspond to the cylindrical grooves (28) one by one, and a machine screw is installed in the threaded hole (27), and the front end of the machine screw is inserted into the cylindrical groove (28).

8. The double-edged rotary cutter according to claim 4, characterized in that: A cavity (23) is axially penetrated inside the blade body (21).

9. The double-edged rotary cutter according to claim 8, characterized in that: The cavity (23) is filled with cooling liquid.

10. The double-edged rotary cutter according to claim 9, characterized in that: A circular hole (26) is provided on the end surface of the torsion projection (25), the circular hole (26) is communicated with the cavity (23), and a sealing plug is installed on the circular hole (26).

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