Precise injection needle cutting sheet

Abstract

The utility model discloses a kind of precision injection needle cutting piece, belong to injection needle cutting technical field, a kind of precision injection needle cutting piece, including first cutter head and second cutter head, it is fixedly connected between the first cutter head and second cutter head by multiple first screws, the front side of first cutter head and the front side of second cutter head are all set up cutter head installation groove, the front side of first cutter head is also set up multiple positioning holes, the rear side of second cutter head is fixed with multiple positioning pins, the rear side of second cutter head is also rotatably connected with multiple connecting shafts, the outside of multiple connecting shafts is all clamped with cutting piece, three edges of multiple cutting pieces are all set up camber, the front end of connecting shaft extends to front side and has gear coaxially fixed through the rear side of second cutter head.The utility model solves the problem that single blade edge is easy to wear after long-term cutting, blade edge passivation speed is fast, maintenance frequency is high, disassembly and installation cutting piece process is relatively cumbersome, affect production efficiency to some extent.

Description

Technical Field

[0001] This utility model belongs to the field of injection needle cutting technology, and more specifically, it relates to a precision injection needle cutting blade. Background Technology

[0002] The tip forming of precision injection needles requires first cutting the needle tube to a fixed length using a cutting blade, followed by subsequent sharpening. The cutting quality directly determines the sharpness, roundness, and safety of the needle tip. Existing precision injection needle cutting blades are prone to wear after long-term cutting with a single cutting edge, resulting in rapid dulling of the cutting edge and high maintenance frequency. The process of disassembling and installing the cutting blade is also cumbersome, thus affecting production efficiency. Therefore, a precision injection needle cutting blade is proposed. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a precision injection needle cutting disc that allows for continued operation by switching to the next arc surface of the cutting disc when wear occurs and replacement is needed, without the need to disassemble the blade. This greatly simplifies the process and solves the problems mentioned in the background art, such as easy wear and tear of a single cutting edge after long-term cutting, rapid dulling of the cutting edge, high maintenance frequency, and cumbersome disassembly and installation of the cutting disc, which affect production efficiency.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a precision injection needle cutting disc, comprising a first cutting disc and a second cutting disc, wherein the first cutting disc and the second cutting disc are fixedly connected by a plurality of first screws; both the front sides of the first cutting disc and the front sides of the second cutting disc are provided with cutting disc mounting grooves; the front side of the first cutting disc is also provided with a plurality of positioning holes; the rear side of the second cutting disc is fixed with a plurality of positioning pins; and the rear side of the second cutting disc is rotatably connected with a plurality of connecting shafts; each of the plurality of connecting shafts is fitted with a cutting disc; and the plurality of cutting discs... All three sides of the device have arc surfaces. The front end of the connecting shaft extends from the rear side of the second cutter head to the front side and is coaxially fixed with a gear. The front side of the second cutter head also has multiple first threaded holes. The front side of the second cutter head is also fixed with a fixing ring. The outer circumference of the fixing ring has a rotating groove. The inner side of the rotating groove is rotatably connected with a gear ring. The outer circumference of the gear ring meshes with the outer sides of multiple gears. The front side of the fixing ring has a notch. The front side of the gear ring has a second threaded hole. The inner side of the second threaded hole is threaded with a second screw.

[0005] As a preferred embodiment of this utility model, the positions of the plurality of positioning pins correspond to the positions of the plurality of positioning holes.

[0006] As a preferred embodiment of this invention, the center of the outermost arc surface coincides with the center of the second cutter head.

[0007] As a preferred embodiment of this utility model, the plurality of first threaded holes are arranged in an arc-shaped structure, and the distance between the plurality of first threaded holes and the center of the second cutter head is the same.

[0008] As a preferred embodiment of this invention, the center of the fixing ring coincides with the center of the second cutter head.

[0009] As a preferred embodiment of this invention, the second threaded hole is located inside the notch.

[0010] As a preferred embodiment of this utility model, the position of the second threaded hole corresponds to the position of one of the first threaded holes.

[0011] This invention provides a precision injection needle cutting disc, which has the following beneficial effects: This precision injection needle cutting disc can switch to the next arc surface of the cutting disc when it wears out and needs to be replaced, allowing it to continue working without disassembling the blade. This greatly simplifies the process and to some extent solves the problems of easy wear and rapid dulling of the cutting edge after long-term cutting with a single cutting edge, high maintenance frequency, and cumbersome disassembly and installation of the cutting disc, which affect production efficiency.

[0012] 2. The precision injection needle cutting disc has a connecting shaft that engages with the cutting disc. The cutting disc can be replaced by disassembling the first cutting disc. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a precision injection needle cutting disc according to the present invention.

[0014] Figure 2 This is a front view schematic diagram of the disassembled structure of a precision injection needle cutting disc according to this utility model.

[0015] Figure 3 This utility model relates to a precision injection needle cutting disc. Figure 2 Enlarged diagram of point A.

[0016] Figure 4 This is a rear view schematic diagram of the disassembled structure of a precision injection needle cutting disc according to the present invention.

[0017] Figure 5 This is a schematic diagram showing the connection relationship between the second cutting disc and the cutting disc of a precision injection needle cutting disc according to this utility model.

[0018] In the diagram: 1. First cutter head; 2. Second cutter head; 3. First screw; 4. Cutter head mounting groove; 5. Positioning hole; 6. Positioning pin; 7. Connecting shaft; 8. Cutting disc; 9. Arc surface; 10. Gear; 11. First threaded hole; 12. Retaining ring; 13. Rotating groove; 14. Gear ring; 15. Notch; 16. Second threaded hole; 17. Second screw. Detailed Implementation

[0019] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0020] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please see Figures 1 to 5This utility model provides a technical solution: a precision injection needle cutting disc, including a first cutting disc 1 and a second cutting disc 2. The first cutting disc 1 and the second cutting disc 2 are fixedly connected by multiple first screws 3. Both the front side of the first cutting disc 1 and the front side of the second cutting disc 2 have cutting disc mounting grooves 4. The front side of the first cutting disc 1 also has multiple positioning holes 5. The rear side of the second cutting disc 2 is fixed with multiple positioning pins 6. The rear side of the second cutting disc 2 is also rotatably connected with multiple connecting shafts 7. Cutting discs 8 are snapped onto the outer sides of the multiple connecting shafts 7. Three sides of the multiple cutting discs 8 have arc surfaces 9. The front end of the connecting shaft 7 passes through the rear side of the second cutting disc 2, extends to the front side, and is coaxially fixed with a gear 10. The front side of the second cutting disc 2 also has multiple first threaded holes 11. A fixing ring 12 is also fixed to the front side of the second cutting disc 2. A rotating groove 13 is provided on the outer side of the circumference. A toothed ring 14 is rotatably connected to the inner side of the rotating groove 13. The outer side of the toothed ring 14 meshes with the outer side of multiple gears 10. A notch 15 is provided on the front side of the fixing ring 12. A second threaded hole 16 is provided on the front side of the toothed ring 14. A second screw 17 is threadedly connected to the inner side of the second threaded hole 16. The positions of multiple positioning pins 6 correspond to the positions of multiple positioning holes 5. The center of the outermost arc surface 9 coincides with the center of the second cutter head 2. Multiple first threaded holes 11 are arranged in an arc structure. The distance between the multiple first threaded holes 11 and the center of the second cutter head 2 is the same. The center of the fixing ring 12 coincides with the center of the second cutter head 2. The second threaded hole 16 is located inside the notch 15. The position of the second threaded hole 16 corresponds to the position of one of the first threaded holes 11. When the cutting disc 8 needs to be replaced due to wear, the second screw 17 is removed, the second threaded hole 16 on the gear ring 14 is pushed to align with the next first threaded hole 11, and the second screw 17 is reinstalled. During this process, the gear ring 14 drives multiple gears 10 to rotate synchronously. The gears 10 drive the cutting disc 8 to rotate synchronously by 120 degrees through the connecting shaft 7, thereby changing the position of the arc surface 9 on the cutting disc 8. Since the center of the outermost arc surface 9 coincides with the center of the second cutter head 2, the arc surfaces 9 on the cutting disc 8 are arranged in a circle. Through the above process, when the cutting disc 8 needs to be replaced due to wear, the next arc surface 9 of the cutting disc 8 can be switched, and the work can continue without disassembling the blade. This greatly simplifies the process and to some extent solves the problems of easy wear after long-term cutting with a single cutting edge, rapid dulling of the cutting edge, high maintenance frequency, and cumbersome disassembly and installation of the cutting disc, which affect production efficiency.

[0023] The specific usage and function of this embodiment: When the cutting blade 8 is worn and needs to be replaced, the second screw 17 is removed, the second threaded hole 16 on the gear ring 14 is pushed to correspond with the next first threaded hole 11, and the second screw 17 is reinstalled. During this process, the gear ring 14 drives multiple gears 10 to rotate synchronously. The gears 10 drive the cutting blade 8 to rotate synchronously by 120 degrees through the connecting shaft 7, thereby changing the position of the arc surface 9 on the cutting blade 8. Since the center of the outermost arc surface 9 coincides with the center of the second cutter disc 2, the arc surfaces 9 on the cutting blade 8 are arranged in a circle. Through the above process, when the cutting blade 8 is worn and needs to be replaced, the next arc surface 9 of the cutting blade 8 can be switched to continue working without disassembling the blade, which greatly simplifies the process.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A precision injection needle cutting disc, comprising a first cutting disc (1) and a second cutting disc (2), characterized in that: The first cutter head (1) and the second cutter head (2) are fixedly connected by a plurality of first screws (3). The front side of the first cutter head (1) and the front side of the second cutter head (2) are both provided with cutter head mounting grooves (4). The front side of the first cutter head (1) is also provided with a plurality of positioning holes (5). The rear side of the second cutter head (2) is fixed with a plurality of positioning pins (6). The rear side of the second cutter head (2) is also rotatably connected with a plurality of connecting shafts (7). Cutting blades (8) are snapped onto the outer side of the plurality of connecting shafts (7). The three sides of the plurality of cutting blades (8) are provided with arc surfaces (9). The front end of the connecting shaft (7) extends through the rear side of the second cutter head (2). A gear (10) is fixed to the front side and coaxially. The front side of the second cutter head (2) is also provided with a plurality of first threaded holes (11). A fixing ring (12) is also fixed to the front side of the second cutter head (2). A rotating groove (13) is provided on the outer circumference of the fixing ring (12). A toothed ring (14) is rotatably connected to the inner side of the rotating groove (13). The outer circumference of the toothed ring (14) meshes with the outer side of the plurality of gears (10). A notch (15) is provided on the front side of the fixing ring (12). A second threaded hole (16) is provided on the front side of the toothed ring (14). A second screw (17) is threadedly connected to the inner side of the second threaded hole (16).

2. The precision injection needle cutting disc according to claim 1, characterized in that: The positions of the plurality of positioning pins (6) correspond to the positions of the plurality of positioning holes (5).

3. The precision injection needle cutting disc according to claim 1, characterized in that: The center of the outermost arc surface (9) coincides with the center of the second cutter head (2).

4. The precision injection needle cutting disc according to claim 1, characterized in that: The plurality of first threaded holes (11) are arranged in an arc-shaped structure, and the plurality of first threaded holes (11) are at the same distance from the center of the second cutter head (2).

5. A precision injection needle cutting disc according to claim 1, characterized in that: The center of the fixed ring (12) coincides with the center of the second cutter head (2).

6. The precision injection needle cutting disc according to claim 1, characterized in that: The second threaded hole (16) is located inside the notch (15).

7. The precision injection needle cutting disc according to claim 1, characterized in that: The position of the second threaded hole (16) corresponds to the position of one of the first threaded holes (11).

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