Single-edge rotary knife

Abstract

The utility model relates to a single-blade rotary knife, which comprises a knife body, a first connecting end and a second connecting end, the first connecting end and the second connecting end are respectively positioned at two ends of the knife body, one side of the knife body far away from a blade is arc-shaped, the second connecting end comprises an elastic piece and a guide post, and the elastic piece is abutted against the end face of the guide post. And the guide sleeve and the guide column are connected in a buckling manner, so that the assembly efficiency is improved. The magnet is installed on the end face of the second connecting end, so that the second connecting end can be installed more stably. During assembly, the spring is firstly placed in the guide sleeve, the lower end of the guide column is inserted into the guide sleeve, then the baffle ring penetrates from the upper end of the guide column and is clamped into the opening in the top of the guide sleeve, and the clamping protrusion is clamped into the groove, so that the baffle ring is fixed, and the guide column is limited. The glue is smeared in the notch in the top of the magnet mounting base, the magnet is placed in the notch in the top of the magnet mounting base to be fixed, and operation is simpler.

Description

Technical Field

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

[0002] A rotary cutting tool is a tool that cuts by rotating around an axis. It is widely used in printing machines, ticket machines, and queuing machines, mainly for cutting paper. When installing the rotary cutter, both ends are connected to the shaft seats of the equipment, usually detachably connected by being stuck in the grooves of the shaft seats. For the convenience of connection, one end of the rotary cutter is elastically telescopic, but the steps in the processing and assembly process of the rotary cutter are rather troublesome, and the assembly efficiency of the fixed connection by screws or snap rings is relatively low.

[0003] Therefore, a single-edge rotary cutter is needed to solve the above technical problems. Summary of the Utility Model

[0004] The utility model aims at the technical problems existing in the prior art and provides a single-edge rotary cutter.

[0005] The technical solution for the utility model to solve the above technical problems is as follows: A single-edge rotary cutter includes a cutter body, a first connection end, and a second connection end. The first connection end and the second connection end are respectively located at both ends of the cutter body. The side of the cutter body away from the cutting edge is arc-shaped. The second connection end includes an elastic member and a guide post, and the elastic member abuts against the end face of the guide post.

[0006] Preferably, in the above single-edge rotary cutter, the elastic member is a spring.

[0007] Preferably, in the above single-edge rotary cutter, the second connection end further includes a guide sleeve. The spring is located inside the guide sleeve. The lower end of the guide post is inserted into the inside of the guide sleeve, and the guide sleeve is slidably connected to the guide post.

[0008] Preferably, in the above single-edge rotary cutter, a retaining ring is provided at the top of the guide sleeve. The cross-sectional diameter of the bottom of the guide post is larger than the inner diameter of the retaining ring, and the guide post passes through the inside of the retaining ring.

[0009] Preferably, in the above single-edge rotary cutter, a circle of clamping protrusions is provided on the outer side of the bottom of the retaining ring, and a circle of grooves is provided on the inner side wall of the top of the guide sleeve. The clamping protrusions are adapted to the grooves.

[0010] Preferably, in the above single-edge rotary cutter, the cross-sections of the contact surfaces of the clamping protrusions and the grooves are both arc-shaped.

[0011] Preferably, in the above single-edge rotary cutter, a flared opening is provided on the inner side wall of the top of the guide sleeve, and the flared opening is located above the groove.

[0012] Preferably, for the above single-edge rotary cutter, a magnet mounting seat is provided at the top of the guide post, a notch is provided at the top of the magnet mounting seat, and a magnet is mounted in the notch.

[0013] The beneficial effects of the present utility model are as follows: The present utility model realizes the limit of the guide post by installing a retaining ring at the top of the guide sleeve, and improves the assembly efficiency by connecting the guide sleeve and the guide post in a snap-fit manner. By installing a magnet on the end face of the second connection end, the installation of the second connection end can be ensured to be more stable. During assembly, first place the spring into the guide sleeve, insert the lower end of the guide post into the guide sleeve, then pass the retaining ring through the upper end of the guide post and snap it into the opening at the top of the guide sleeve, and snap the positioning protrusion into the groove to realize the fixation of the retaining ring and the limit of the guide post. Apply glue to the notch at the top of the magnet mounting seat, and place the magnet into the notch at the top of the magnet mounting seat to realize the fixation of the magnet, which is more simple to operate. Description of the Drawings

[0014] Figure 1 is a three-dimensional view of the present utility model;

[0015] Figure 2 is of the present utility model Figure 1 partial enlarged view at A in;

[0016] Figure 3 is a schematic diagram of the internal structure of the second connection end;

[0017] Figure 4 is a schematic diagram of the mating structure of the guide sleeve and the retaining ring;

[0018] Figure 5 is Figure 4 partial enlarged view at B in.

[0019] In the drawings, the list of components represented by each reference numeral is as follows:

[0020] 1. First connection end, 2. Tool body, 3. Second connection end, 31. Guide sleeve, 311. Groove, 312. Flared opening, 32. Guide post, 33. Magnet mounting seat, 34. Magnet, 35. Retaining ring, 351. Positioning protrusion, 36. Spring. Detailed Embodiments

[0021] The principles and features of the present utility model will be described below with reference to the accompanying drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model.

[0022] As Figures 1 to 5As shown, a single-edge rotary cutter includes a cutter body 2, a first connection end 1, and a second connection end 3. The first connection end 1 and the second connection end 3 are respectively located at both ends of the cutter body 2. The side of the cutter body 2 away from the cutting edge is arc-shaped.

[0023] The second connection end 3 includes an elastic member, a guide post 32, and a guide sleeve 31. The elastic member is a spring 36. The guide sleeve 31 and the cutter body 2 are of an integrally formed structure. The top of the guide sleeve 31 is provided with an opening, and a retaining ring 35 is arranged at the top of the guide sleeve 31. The retaining ring 35 is installed at the opening. A circle of clamping protrusions 351 is arranged on the outer side of the bottom of the retaining ring 35, and a circle of grooves 311 is arranged on the inner side wall of the top of the guide sleeve 31. The clamping protrusions 351 and the grooves 311 are adapted to each other, and the clamping protrusions 351 are used to be clamped into the grooves 311. The cross-sections of the contact surfaces of the clamping protrusions 351 and the grooves 311 are both arc-shaped, which is convenient for directly clamping the clamping protrusions 351 into the grooves 311 by extrusion. Further, a flared opening 312 is arranged on the inner side wall of the top of the guide sleeve 31. The flared opening 312 is located above the grooves 311. When the clamping protrusions 351 are clamped into the grooves 311, the flared opening 312 can play a guiding role to facilitate the clamping of the clamping protrusions 351.

[0024] The spring 36 is located inside the guide sleeve 31. The outer diameter of the cross-section of the spring 36 is slightly smaller than the inner diameter of the cross-section of the guide sleeve 31. The lower end of the guide post 32 passes through the inside of the retaining ring 35 and is inserted into the inside of the guide sleeve 31. The spring 36 abuts against the lower end surface of the guide post 32. The diameter of the bottom cross-section of the guide post 32 is larger than the inner diameter of the retaining ring 35 to prevent the guide post 32 from detaching from the guide sleeve 31. The guide sleeve 31 is slidably connected to the guide post 32. A magnet mounting seat 33 is arranged at the top of the guide post 32. A notch is arranged at the top of the magnet mounting seat 33, and a magnet 34 is fixedly installed in the notch by glue. After the guide post 32 is installed into the shaft seat groove, the magnet 34 can generate an adsorption force on the bottom surface of the groove to prevent the guide post 32 from detaching from the shaft seat groove during use.

[0025] Working principle: During assembly, first place the spring 36 into the guide sleeve 31, insert the lower end of the guide post 32 into the guide sleeve 31, then pass the retaining ring 35 through the upper end of the guide post 32 and snap it into the top opening of the guide sleeve 31, and snap the positioning protrusion 351 into the groove 311 to fix the retaining ring 35 and limit the guide post 32. Apply glue to the notch at the top of the magnet mounting base 33, and place the magnet 34 into the notch at the top of the magnet mounting base 33 to fix the magnet 34. Wait for the glue to dry. When installing this single-edge rotary cutter onto the shaft seat groove, first insert the first connection end 1 into one end of the groove, then press the guide post 32 to shorten the overall length of the second connection end. Then align one end of the magnet mounting base 33 with the other shaft seat groove, release the guide post 32, and the spring 36 will push out the guide post 32. The extended second connection end will snap into the shaft seat groove, thus realizing the installation of this single-edge rotary cutter.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, specific orientation structure and operation. Therefore, it should not be construed as a limitation to the present invention. 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 quantity of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0027] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" and the like 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The above has described a detailed description of an embodiment of the present invention, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A single-edge rotary cutter, characterized in that: It includes a blade body (2), a first connection end (1), and a second connection end (3). The first connection end (1) and the second connection end (3) are respectively located at both ends of the blade body (2). The side of the blade body (2) away from the blade edge is arc-shaped. The second connection end (3) includes an elastic member and a guide post (32), and the elastic member abuts against the end face of the guide post (32).

2. The single-edge rotary cutter according to claim 1, wherein: The elastic member is a spring (36).

3. The single-edge rotary cutter according to claim 2, wherein: The second connection end (3) further includes a guide sleeve (31). The spring (36) is located inside the guide sleeve (31). The lower end of the guide post (32) is inserted into the interior of the guide sleeve (31), and the guide sleeve (31) is slidably connected to the guide post (32).

4. The single-edge rotary cutter according to claim 3, characterized in that: A retaining ring (35) is provided at the top of the guide sleeve (31). The cross-sectional diameter of the bottom of the guide post (32) is greater than the inner diameter of the retaining ring (35), and the guide post (32) passes through the interior of the retaining ring (35).

5. The single-edge rotary cutter according to claim 4, wherein: A circle of clamping protrusions (351) is provided on the outer side of the bottom of the retaining ring (35), and a circle of grooves (311) is provided on the inner side wall of the top of the guide sleeve (31). The clamping protrusions (351) are adapted to the grooves (311).

6. The single-edge rotary cutter according to claim 5, characterized in that: The cross-sections at the contact surfaces of the clamping protrusions (351) and the grooves (311) are both arc-shaped.

7. The single-edge rotary cutter according to claim 5, characterized in that: A flared opening (312) is provided on the inner side wall of the top of the guide sleeve (31), and the flared opening (312) is located above the grooves (311).

8. The single-edge rotary cutter according to claim 1, wherein: A magnet mounting seat (33) is provided at the top of the guide post (32). A notch is provided at the top of the magnet mounting seat (33), and a magnet (34) is installed in the notch.

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