A paper cutting machine with replaceable blades

Abstract

This utility model discloses a paper cutter with easily replaceable blades, relating to the field of paper cutting technology. It includes a mounting frame, a transmission assembly within the mounting frame, a cutter within the transmission assembly, and a grinding assembly on the surface of the mounting frame for grinding the cutter. The transmission assembly includes two sets of parallel transmission shafts, each with an axial groove on its surface. A detachable cutter is mounted on the transmission shaft, comprising a first blade and a second blade connected by bolts. Each blade has a positioning protrusion that mates with the groove on the transmission shaft. This utility model, by setting up the cutter, uses the engagement of the groove and the protrusion to drive the blade assembly to rotate synchronously. The positioning protrusion on the back of the blade precisely engages with the groove on the transmission shaft, ensuring that the blade automatically aligns to the correct position during installation. Furthermore, when replacing the blade, only the bolt needs to be rotated to separate the blade into two main parts, thus facilitating disassembly and replacement.

Description

Technical Field

[0001] This utility model relates to the field of paper cutting technology, specifically a paper cutting machine with easily replaceable blades. Background Technology

[0002] In the paper processing, printing, or packaging industries, cutting machines are commonly used equipment for precisely cutting paper, cardboard, or other materials. Traditional cutting machine blades are typically fixed to the drive shaft by bolts or welding. When the blades wear out or need replacement, the disassembly and installation process is cumbersome, impacting production efficiency.

[0003] An existing patent (authorization announcement number: CN219275913U) discloses a paper cutter. The key technical points of the solution are: by incorporating a lifting block, pressure oil steel, protective block, blade changing door, keyhole, blade clamping block, blade clamping column, fixing bolts, and paper cutting blades, it is beneficial to press the paper being cut by the pressure oil steel and protective block during cutting, making the paper cutting more stable, the cutting size more stable, and preventing harm to the human body. The cutting is more stable, and the paper cutting blades can be replaced after long-term use by disassembling through the fixing bolts, opening the blade changing door through the keyhole, and pulling out the paper cutting blades through the blade clamping column, making the replacement of paper cutting blades simple and quick. After cutting, the cut paper is conveyed to the next process, which is more stable and simple.

[0004] However, the above technical solutions still have certain defects. After long-term use, the blade edge becomes dull, resulting in uneven cutting edges and even burrs. At the same time, the blade body is a whole when disassembling, and the operation is time-consuming when replacing it. Therefore, a paper cutting machine that makes it easy to replace the blade is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a paper cutter with easily replaceable blades to solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A paper cutting machine with easy-to-change blades includes a mounting frame, a transmission assembly is disposed within the mounting frame, a cutter is disposed within the transmission assembly, and a grinding assembly for grinding the cutter is disposed on the surface of the mounting frame.

[0008] The transmission assembly includes two sets of parallel transmission shafts, and the surface of the transmission shafts is provided with axial grooves.

[0009] The drive shaft is equipped with a detachable cutter, which includes a first blade and a second blade connected by bolts. The blades are provided with positioning protrusions that cooperate with the slide groove of the drive shaft, and the end of the drive shaft is provided with a limiting block to prevent the blades from falling off.

[0010] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0011] As a further embodiment of this utility model: a sliding groove is provided on the transmission shaft, and both the first blade and the second blade are slidably disposed on the sliding groove.

[0012] As a further embodiment of this utility model: the grinding assembly includes a fixed frame that is fixedly installed inside the mounting bracket. A grinding head is slidably arranged on the fixed frame. There are two sets of grinding heads, and a limiting rod is provided through the two sets of grinding heads. Limiting components are provided at both ends of the limiting rod, and a moving rod is fixedly arranged at the middle section of the limiting rod. An adjustment component is provided on the moving rod.

[0013] As a further embodiment of this utility model: the adjustment component includes a movable plate fixedly installed at the top of the movable rod, a groove is provided in the movable plate, a spring is fixedly installed in the groove, a driven plate is fixedly connected to the other end of the spring, a fixed rod is fixedly installed at the top of the driven plate, and a limit plate is also provided at the top of the mounting frame, with multiple slots adapted to the driven plate on the limit plate.

[0014] As a further embodiment of this utility model: the transmission assembly also includes a drive motor fixedly mounted on the mounting bracket, the output end of the drive motor is fixedly provided with a transmission wheel, the transmission wheel is connected to another transmission wheel through a belt, the belt is a toothed belt, and a first gear and a second gear are respectively provided on the two sets of transmission shafts, and the first gear and the second gear mesh with each other, the ends of the two sets of transmission shafts are provided with positioners, and the surfaces of the two sets of transmission shafts are provided with cutters.

[0015] As a further improvement of this utility model: the fixing frame has two sets of grinding heads running through it, and the fixing frame is arranged in a tree branch shape.

[0016] As a further improvement of this utility model, the grinding head is made of abrasive material.

[0017] As a further improvement of this utility model: the mounting bracket is also provided with an arc-shaped sliding groove, and the arc-shaped sliding groove is connected to the location of the cutter.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. This utility model sets up a cutter, which drives the blade assembly to rotate synchronously through the cooperation of the sliding groove and the protrusion. The positioning protrusion on the back of the blade and the sliding groove of the transmission shaft form a precise fit, ensuring that the blade is automatically aligned to the correct position during installation. At the same time, when replacing the blade, it is only necessary to rotate the bolt to separate the blade into two main bodies, which makes it easy to disassemble and replace.

[0020] 2. By setting up a grinding component, when the first blade and the second blade rotate, the two grinding heads will grind the surface of the blade, so as to achieve the function of cutting and grinding at the same time, thereby reducing the frequency of cutting replacement. At the same time, the grinding head is made of abrasive material, which can automatically grind the cutting edge when the blade rotates. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the transmission component of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the transmission shaft of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the cutter of this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the grinding component of this utility model;

[0026] Figure 6 For the present utility model Figure 5 Enlarged view of point A in the middle.

[0027] Figure label annotations: 1. Mounting bracket; 2. Transmission assembly; 3. Cutter; 4. Grinding assembly;

[0028] 21. Drive motor; 22. Belt; 23. Transmission pulley; 24. First gear; 25. Second gear; 26. Drive shaft; 27. Positioner;

[0029] 31. First blade; 32. Second blade; 33. Positioning hole;

[0030] 41. Fixing frame; 42. Grinding head; 43. Limiting rod; 44. Moving rod; 45. Adjusting assembly;

[0031] 451. Moving plate; 452. Spring; 453. Driven plate; 454. Fixed rod; 455. Limiting plate. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] In one embodiment, such as Figures 1-6 As shown, a paper cutter with easy blade replacement includes a mounting frame 1, a transmission assembly 2 is provided inside the mounting frame 1, a cutter 3 is provided inside the transmission assembly 2, and a grinding assembly 4 for grinding the cutter 3 is provided on the surface of the mounting frame 1.

[0034] In this embodiment, the transmission component 2 drives the cutter 3 to perform reciprocating or rotating motion to achieve paper cutting. The blade is designed to be detachable. When replacing it, simply loosen the bolt and remove it along the slide groove. There is no need for complicated disassembly steps. The grinding component 4 automatically grinds the blade edge to restore its sharpness and reduce the replacement frequency.

[0035] In one embodiment, such as Figure 1 and Figure 2 As shown, the mounting bracket 1 is also provided with an arc-shaped groove, which connects to the location of the cutter 3. The transmission assembly 2 includes a drive motor 21 fixedly mounted on the mounting bracket 1. A transmission wheel 23 is fixedly mounted on the output end of the drive motor 21. The transmission wheel 23 is connected to another transmission wheel 23 via a belt 22, which is a toothed belt. A transmission shaft 26 is fixedly connected to the center of the other transmission wheel 23. The transmission shaft 26 has two sets, and a first gear 24 and a second gear 25 are respectively mounted on the two sets of transmission shafts 26. The first gear 24 and the second gear 25 mesh with each other. The ends of the two sets of transmission shafts 26 are connected to each other. A positioner 27 is provided, and cutters 3 are provided on the surfaces of two sets of drive shafts 26. By feeding the paper into the arc-shaped chute, the drive motor 21 drives the drive wheel 23 to rotate, and the power is transmitted to another drive wheel 23 through the belt 22. The drive wheel 23 is connected to the drive shaft 26. The two drive shafts 26 achieve synchronous reverse rotation through meshing gears, so that the blade of the cutter 3 forms a shearing motion, improving cutting efficiency. The positioner 27 is installed at the end of the drive shaft 26 to ensure stable operation of the drive shaft 26 and prevent axial movement. The two sets of drive shafts 26 achieve synchronous reverse rotation through gear meshing, so that the blade forms a shearing force, which is more labor-saving and produces a smoother cut compared to single-blade cutting.

[0036] In one embodiment, such as Figure 2As shown, the transmission assembly 2 includes two sets of parallel transmission shafts 26, each with an axial groove on its surface. A detachable cutter 3 is mounted on each transmission shaft 26. The cutter 3 includes a first blade 31 and a second blade 32 connected by bolts. Each blade has a positioning protrusion that engages with the groove on the transmission shaft 26. A limiting block is provided at the end of the transmission shaft 26 to prevent the blade from falling off. The first blade 31 and the second blade 32 are slidably mounted on the groove. A motor drives the transmission shaft 26 to rotate, and the engagement of the groove and the protrusion causes the blade assembly to rotate synchronously. The positioning protrusion on the back of the blade precisely engages with the groove on the transmission shaft 26, ensuring that the blade automatically aligns to the correct position during installation. This tenon-and-mortise structure keeps the blade stable during high-speed operation. The limiting block provides a physical barrier to prevent accidental slippage of the blade during operation, and the groove structure provides installation guidance and limits radial displacement of the blade.

[0037] In one embodiment, such as Figure 5 As shown, the grinding assembly 4 includes a fixed frame 41 fixedly installed inside the mounting bracket 1. Grinding heads 42 are slidably mounted on the fixed frame 41. Two sets of grinding heads 42 are provided, and a limiting rod 43 passes through both sets of grinding heads 42. Limiting elements are provided at both ends of the limiting rod 43, and a moving rod 44 is fixedly mounted at the middle section of the limiting rod 43. An adjusting component 45 is provided on the moving rod 44. The fixed frame 41 has two sets of grinding heads 42 passing through it and is arranged in a tree-branch shape. The grinding heads 42 are made of abrasive material. The grinding heads 42 are slidably mounted. Mounted on the fixed frame 41, it can move along the limiting rod 43. When the first blade 31 and the second blade 32 rotate, the two sets of grinding heads 42 will grind the surface of the blades to achieve the function of cutting and grinding at the same time, so as to reduce the frequency of cutting the cutter 3 replacement. At the same time, the grinding head 42 is made of abrasive material, which can automatically grind the cutting edge when the blade rotates. Through the cooperation of the limiting rod 43 and the limiting component, it is ensured that the grinding head 42 will not move excessively, avoiding excessive grinding pressure and damaging the blade. At the same time, the two sets of grinding heads 42 can grind the two cutting edges of the blade at the same time, improving efficiency and maintaining the symmetry of the cutting edge.

[0038] In one embodiment, such as Figure 6As shown, the adjustment assembly 45 includes a movable plate 451 fixedly installed at the top of the movable rod 44. The movable plate 451 has a groove, and a spring 452 is fixedly installed in the groove. The other end of the spring 452 is fixedly connected to a driven plate 453. A fixed rod 454 is fixedly installed at the top of the driven plate 453. A limit plate 455 is also provided at the top of the mounting frame 1. The limit plate 455 has multiple slots that are adapted to the driven plate 453. When the rod 44 is moved, the spring 452 is compressed by the movable plate 451 to connect the movable plate 451 and the driven plate 453. When it touches an obstacle, the driven plate 453 can retract into the movable plate 451. The fixed rod 454 moves with the driven plate 453. When it is manually moved to a preset position, the fixed rod 454 will be embedded in the corresponding slot of the limit plate 455. Multiple slots provide fixed positions for different gears, and by moving the position of the grinding head 42, the blade moves on the drive shaft 26, thereby cutting out paper of different sizes as needed.

[0039] The above embodiment discloses a paper cutter with easy blade replacement. In this embodiment, by setting up a transmission component 2, the drive motor 21 drives the transmission wheel 23 to rotate, and the power is transmitted to another transmission wheel 23 through the belt 22. The transmission wheel 23 is connected to the transmission shaft 26. The two transmission shafts 26 achieve synchronous and opposite rotation through meshing gears, so that the cutter 3 cuts the paper. When the first blade 31 and the second blade 32 are rotating and cutting the paper, two sets of grinding heads 42 will grind the surface of the blades to achieve the function of cutting and grinding at the same time, so as to reduce the frequency of cutting head 3 replacement. At the same time, the grinding head 42 is made of abrasive material, which can automatically sharpen the blade edge when the blade is rotating.

[0040] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A paper cutting machine facilitating replacement of blades, comprising a mounting frame (1) having a transmission assembly (2) disposed therein, characterized in that, The transmission assembly (2) is provided with a cutter (3), and the surface of the mounting bracket (1) is provided with a grinding assembly (4) for grinding the cutter (3); The transmission assembly (2) includes two sets of transmission shafts (26) arranged in parallel, and the surface of the transmission shafts (26) is provided with axial grooves; A detachable cutter (3) is provided on the drive shaft (26). The cutter (3) includes a first blade (31) and a second blade (32) connected by bolts. The blade is provided with a positioning protrusion that cooperates with the slide groove of the drive shaft (26). The end of the drive shaft (26) is provided with a limiting block to prevent the blade from falling off.

2. The paper cutting machine of claim 1, wherein, The drive shaft (26) is provided with a sliding groove, and the first blade (31) and the second blade (32) are both slidably disposed on the sliding groove.

3. The paper cutting machine of claim 1, wherein, The grinding assembly (4) includes a fixed frame (41) fixedly installed inside the mounting frame (1). A grinding head (42) is slidably arranged on the fixed frame (41). There are two sets of grinding heads (42), and a limit rod (43) is provided through the two sets of grinding heads (42). Limiting elements are provided at both ends of the limit rod (43), and a moving rod (44) is fixedly arranged at the middle section of the limit rod (43). An adjustment component (45) is provided on the moving rod (44).

4. The paper cutting machine of claim 3, wherein, The adjustment assembly (45) includes a movable plate (451) fixedly installed at the top of the movable rod (44). The movable plate (451) has a groove, and a spring (452) is fixedly installed in the groove. The other end of the spring (452) is fixedly connected to a driven plate (453). A fixed rod (454) is fixedly installed at the top of the driven plate (453). A limiting plate (455) is also provided at the top of the mounting bracket (1). The limiting plate (455) has multiple slots that are adapted to the driven plate (453).

5. The paper cutter of claim 1, wherein, The transmission assembly (2) also includes a drive motor (21) fixedly mounted on the mounting bracket (1). The output end of the drive motor (21) is fixedly provided with a transmission wheel (23). The transmission wheel (23) is connected to another transmission wheel (23) via a belt (22). The belt (22) is a toothed belt. A first gear (24) and a second gear (25) are respectively provided on the two sets of transmission shafts (26). The first gear (24) and the second gear (25) mesh with each other. A positioner (27) is provided at the end of the two sets of transmission shafts (26). A cutter (3) is provided on the surface of the two sets of transmission shafts (26).

6. The paper cutter of claim 3 wherein, The fixing frame (41) has two sets of grinding heads (42) running through it, and the fixing frame (41) is arranged in a tree branch shape.

7. The paper cutter of claim 6 wherein, The grinding head (42) is made of abrasive material.

8. The paper cutter of claim 1, wherein, The mounting bracket (1) is also provided with an arc-shaped groove, and the arc-shaped groove is connected to the location of the cutter (3).

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