Paper shredder knife

Abstract

The utility model relates to the technical field of paper shredders, in particular to a paper shredder cutter which comprises a cutter shaft body, a positioning sleeve is installed on the outer side of the cutter shaft body, fixing discs are installed at the left end and the right end of the positioning sleeve respectively, and a plurality of sets of first cutter discs and a plurality of sets of second cutter discs are installed on the outer side of the positioning sleeve respectively. First blades are mounted among the multiple groups of first cutter heads, and second blades are mounted among the multiple groups of second cutter heads; the top of the first blade is provided with a first cutter head, the top of the second blade is provided with a second cutter head, the bottom of the first cutter head and the bottom of the second cutter head are both provided with inserting blocks, and the positions, corresponding to the inserting blocks, of the inner side of the first blade and the inner side of the second blade are both provided with inserting grooves. According to the paper shredder, the disassembly convenience of the knife of the paper shredder can be improved through the design, meanwhile, the use cost of the paper shredder is also reduced, and the paper shredding effect is also greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shredders, and particularly relates to a shredder knife. Background Art

[0002] At present, two cutter shafts are included in a shredder. Blades are respectively and evenly spaced and fixed on each cutter shaft. The blades on the two cutter shafts rotate towards each other, and a certain intersection area is formed by their mutual intersection. During operation, paper enters between the two cutter shafts and between the blades, and the paper is cut into strip-shaped shredded paper under the movement of the blades. Of course, the blades can be separately provided, and a spacer is sleeved between two adjacent blades. It is also possible to integrally form the blade and the cutter shaft, and the blade is milled on a shaft body. This integrally formed cutter shaft has high strength and high fitting accuracy, so it is often used at present.

[0003] However, in actual use, whether it is a single blade or an integrally formed cutter shaft, the blade will be worn or damaged after long-term use. At this time, the blade needs to be disassembled for replacement or grinding. When disassembly is required, the shredder needs to be disassembled, and then the cutter shaft needs to be disassembled first before the blade on the cutter shaft can be disassembled from the cutter shaft. The operation is very cumbersome and inconvenient. For the integrally formed cutter shaft, the whole needs to be disassembled. Not only is the operation cumbersome, but also if grinding cannot solve the problem of the blade, the whole needs to be replaced, thus greatly increasing the use cost of the shredder.

[0004] Therefore, it is particularly important to urgently design a shredder knife to solve the above defects. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model designs a shredder knife, which aims to solve the technical problems that the disassembly of the shredder knife is very cumbersome and inconvenient after the shredder knife is worn or damaged in the prior art, and the replacement of the integrally formed cutter shaft increases the use cost of the shredder.

[0006] To achieve the above object, the utility model provides the following technical solutions:

[0007] A shredder knife includes a cutter shaft body. A positioning sleeve is installed on the outer side of the cutter shaft body. Fixed disks are installed at both the left and right ends of the positioning sleeve. Multiple groups of first cutter disks and multiple groups of second cutter disks are respectively installed on the outer side of the positioning sleeve. First blades are installed between multiple groups of the first cutter disks, and second blades are installed between multiple groups of the second cutter disks;

[0008] A first cutter head is installed at the top of the first blade, and a second cutter head is installed at the top of the second blade. Insertion blocks are installed at the bottoms of both the first cutter head and the second cutter head. Insertion slots are provided at positions corresponding to the insertion blocks on the inner sides of the first blade and the second blade. Both the front and rear sides of the insertion blocks are fixedly connected to the first blade and the second blade by screws.

[0009] As a preferred solution of the present utility model, the positioning sleeve is fixedly connected to the outer side of the cutter shaft body. Two groups of positioning convex strips are fixedly provided on the outer side of the positioning sleeve. The two groups of positioning convex strips are symmetrically distributed on the outer side of the positioning sleeve. Positioning grooves are provided at positions corresponding to the positioning convex strips on the inner sides of the first cutter disc, the second cutter disc, and the fixed disc.

[0010] As a preferred solution of the present utility model, fixing rings are threadedly connected to the left and right ends of the positioning sleeve and located outside the two groups of fixed discs. Multiple groups of the first cutter discs and the second cutter discs are respectively installed inside the two groups of fixed discs in a crisscross manner.

[0011] As a preferred solution of the present utility model, connecting rods are respectively inserted through the inner sides of the upper and lower ends of multiple groups of the first cutter discs and the second cutter discs. Multiple groups of the first blades and the second blades are rotatably connected to the connecting rods. Fixing holes are provided at positions corresponding to the connecting rods on the inner sides of the fixed discs. The left and right ends of the connecting rods extend into the inner sides of the fixing holes.

[0012] As a preferred solution of the present utility model, a first intersection area is provided between multiple groups of the first blades, and a second intersection area is provided between multiple groups of the second blades. The first intersection area is adapted to be used with the second blade, and the second intersection area is adapted to be used with the first blade.

[0013] As a preferred solution of the present utility model, convex heads are provided at the middle positions on the outer sides of multiple groups of the second blades. The convex heads are integrally designed with the second blades.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] When the shredder of the present utility model is in use, the cutter shaft body rotates to drive multiple groups of the first cutter discs and the second cutter discs to rotate, so as to cut and crush the paper by using the first blade and the second blade. Actually, the parts of the first cutter head and the second cutter head are used for cutting. When the paper touches the outer sides of the first cutter disc, the second cutter disc, the first blade, and the second blade, it will be directly broken. After the first cutter head and the second cutter head are worn or damaged due to long-term cutting of the paper, after the shredder stops, according to the damaged first cutter head or second cutter head, the screws at the corresponding positions can be individually unscrewed to release the fixation of the insertion block. At this time, the first cutter head or the second cutter head can be individually disassembled, ground, or replaced, thus greatly improving the convenience of disassembly and also reducing the use cost of the shredder. Brief Description of the Drawings

[0016] Figure 1 This is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 This is a schematic diagram of the positioning rib structure of the present utility model;

[0018] Figure 3 This is a schematic diagram of the split structure of the first cutter head of the present utility model.

[0019] In the figure: 1, cutter shaft body; 2, positioning sleeve; 201, positioning rib; 202, fixing ring; 3, fixing disk; 4, first cutter disk; 401, connecting rod; 5, second cutter disk; 6, first cutter blade; 601, first cutter head; 602, inserting block; 603, inserting slot; 604, screw; 605, first intersection area; 7, second cutter blade; 701, second cutter head; 702, second intersection area; 703, convex head. Embodiment

[0020] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Embodiment

[0021] Please refer to Figures 1 - 3 , the present utility model provides a technical solution:

[0022] A shredder knife includes a cutter shaft body 1, a positioning sleeve 2 is installed on the outer side of the cutter shaft body 1, fixing disks 3 are installed at both the left and right ends of the positioning sleeve 2, multiple groups of first cutter disks 4 and multiple groups of second cutter disks 5 are respectively installed on the outer side of the positioning sleeve 2, first cutter blades 6 are installed between multiple groups of first cutter disks 4, and second cutter blades 7 are installed between multiple groups of second cutter disks 5.

[0023] First, a first cutter head 601 is installed at the top of the first blade 6, and a second cutter head 701 is installed at the top of the second blade 7. Plug-in blocks 602 are installed at the bottoms of both the first cutter head 601 and the second cutter head 701. Plug-in slots 603 are provided at positions corresponding to the plug-in blocks 602 on the inner sides of the first blade 6 and the second blade 7. Both the front and rear sides of the plug-in blocks 602 are fixedly connected to the first blade 6 and the second blade 7 by screws 604. When the shredder is in use, the cutter shaft body 1 rotates multiple first cutter discs 4 and second cutter discs 5 to rotate, so as to cut and crush the paper by using the first blade 6 and the second blade 7. However, the parts of the first cutter head 601 and the second cutter head 701 are actually used for cutting. When the paper touches the outer sides of the first cutter disc 4, the second cutter disc 5, the first blade 6 and the second blade 7, it will be directly broken. When the first cutter head 601 and the second cutter head 701 are worn or damaged after long-term cutting of the paper, after the shredder stops, according to the damaged first cutter head 601 or second cutter head 701, the screws 604 at the corresponding positions can be individually unscrewed, so as to release the fixation of the plug-in block 602. At this time, the first cutter head 601 or the second cutter head 701 can be individually disassembled, ground or replaced, thus greatly improving the convenience of disassembly and at the same time reducing the use cost of the shredder.

[0024] Furthermore, a positioning sleeve 2 is fixedly connected to the outer side of the cutter shaft body 1. Two positioning ribs 201 are fixedly provided on the outer side of the positioning sleeve 2. The two positioning ribs 201 are symmetrically distributed on the outer side of the positioning sleeve 2. Positioning grooves are provided at positions corresponding to the positioning ribs 201 on the inner sides of the first cutter disc 4, the second cutter disc 5 and the fixed disc 3. When the first cutter disc 4, the second cutter disc 5 and the fixed disc 3 are installed, they are all installed on the outer side of the positioning sleeve 2 by aligning the positioning grooves with the positioning ribs 201, so as to perform positioning installation and improve the convenience during installation.

[0025] Then, fixing rings 202 are threadedly connected to the left and right ends of the positioning sleeve 2 and located outside the two fixed discs 3. Multiple first cutter discs 4 and second cutter discs 5 are respectively installed inside the two fixed discs 3 in a criss-cross manner. After all the first cutter discs 4 and second cutter discs 5 are installed on the outer side of the positioning sleeve 2, then the two fixed discs 3 are installed at the left and right ends of the positioning sleeve 2. Finally, the fixing rings 202 are tightened on the outer sides of the fixed discs 3, so as to fix and limit the multiple first cutter discs 4 and second cutter discs 5.

[0026] Furthermore, connecting rods 401 are inserted through the inner sides of the upper and lower ends of multiple groups of first cutter disks 4 and second cutter disks 5. Multiple groups of first blades 6 and second blades 7 are rotatably connected to the connecting rods 401. Fixing holes are formed at positions on the inner side of the fixed disk 3 corresponding to the connecting rods 401. The left and right ends of the connecting rods 401 extend into the inner sides of the fixing holes. When installing the first cutter disk 4 and the second cutter disk 5, the connecting rods 401 are inserted through the upper and lower ends of the first cutter disk 4 and the second cutter disk 5. Finally, the two ends of the connecting rods 401 enter the fixing holes, and the connecting rods 401 are fixed by fixing the fixed disk 3. When shredding paper, the first blades 6 and the second blades 7 can not only cut and shred paper under the action of centrifugal force, but also rotate on the outer sides of the connecting rods 401 when the first blades 6 and the second blades 7 are subjected to resistance, thereby improving the shredding effect.

[0027] Secondly, a first intersection area 605 is provided between multiple groups of first blades 6, and a second intersection area 702 is provided between multiple groups of second blades 7. The first intersection area 605 is adapted to be used with the second blades 7, and the second intersection area 702 is adapted to be used with the first blades 6. When the two cutter shaft bodies 1 in the shredder rotate, the first blades 6 will enter the second intersection area 702 on the outer side of the other cutter shaft body 1, and the second blades 7 will enter the first intersection area 605 on the outer side of the other cutter shaft body 1, so as to cut and shred the paper in an interleaved manner, further improving the shredding effect.

[0028] Finally, protrusions 703 are provided in the middle of the outer sides of multiple groups of second blades 7. The protrusions 703 and the second blades 7 are designed as an integral structure. Different from the first blades 6, the second blades 7 are additionally provided with the protrusions 703, making the outer sides of the second blades 7 more irregular, and further improving the crushing effect when cutting and shredding the paper.

[0029] In this embodiment, the implementation scenario is specifically as follows: When the shredder is in use, the cutter shaft body 1 rotates multiple groups of first cutter discs 4 and second cutter discs 5, so as to cut and shred the paper by using the first blades 6 and the second blades 7. Actually, the parts used for cutting are the first cutting heads 601 and the second cutting heads 701. When the paper touches the outer sides of the first cutter disc 4, the second cutter disc 5, the first blade 6 and the second blade 7, it will be directly broken. After the first cutting head 601 and the second cutting head 701 are worn or damaged due to long-term cutting of the paper, after the shredder stops, according to the damaged first cutting head 601 or second cutting head 701, the screws 604 at the corresponding positions can be unscrewed separately, so as to release the fixation of the plug-in block 602. At this time, the first cutting head 601 or the second cutting head 701 can be disassembled, ground or replaced separately. When performing the shredding operation, the first blade 6 and the second blade 7 can not only cut and shred the paper under the action of centrifugal force, but also rotate on the outer side of the connecting rod 401 when the first blade 6 and the second blade 7 receive resistance, so as to improve the shredding effect. When the two cutter shaft bodies 1 in the shredder rotate, the first blade 6 will enter the second intersection area 702 outside the other cutter shaft body 1, and the second blade 7 will enter the first intersection area 605 outside the other cutter shaft body 1, so as to cut and shred the paper alternately, further improving the shredding effect. Different from the first blade 6, the second blade 7 is additionally provided with a convex head 703, making the outer side of the second blade 7 more irregular, and further improving the crushing effect when cutting and shredding the paper. The whole operation process is simple and convenient. Compared with the existing shredder knives, the present utility model can improve the convenience of disassembling the shredder knives through the design, and at the same time reduce the use cost of the shredder, and greatly improve the shredding effect.

[0030] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A shredder blade, comprising a cutter shaft body (1), characterized in that: A positioning sleeve (2) is installed on the outer side of the cutter shaft body (1). Fixed disks (3) are installed at both the left and right ends of the positioning sleeve (2). Multiple groups of first cutter disks (4) and multiple groups of second cutter disks (5) are respectively installed on the outer side of the positioning sleeve (2). First blades (6) are installed between multiple groups of the first cutter disks (4), and second blades (7) are installed between multiple groups of the second cutter disks (5). A first cutter head (601) is installed on the top of the first blade (6), and a second cutter head (701) is installed on the top of the second blade (7). Insertion blocks (602) are installed at the bottoms of the first cutter head (601) and the second cutter head (701). Insertion grooves (603) are opened at positions on the inner sides of the first blade (6) and the second blade (7) corresponding to the insertion blocks (602). The front and rear sides of the insertion blocks (602) are fixedly connected to the first blade (6) and the second blade (7) by screws (604).

2. The shredder knife according to claim 1, characterized in that: The positioning sleeve (2) is fixedly connected to the outer side of the cutter shaft body (1). Two groups of positioning ridges (201) are fixedly provided on the outer side of the positioning sleeve (2). The two groups of positioning ridges (201) are symmetrically distributed on the outer side of the positioning sleeve (2). Positioning grooves are opened at positions on the inner sides of the first cutter disk (4), the second cutter disk (5), and the fixed disk (3) corresponding to the positioning ridges (201).

3. A shredder blade according to claim 1, characterized in that: Fixing rings (202) are threadedly connected to the left and right ends of the positioning sleeve (2) and located outside the two groups of fixed disks (3). Multiple groups of the first cutter disks (4) and the second cutter disks (5) are respectively installed vertically and horizontally inside the two groups of fixed disks (3).

4. A shredder knife according to claim 1, characterized in that: Connecting rods (401) are inserted through the inner sides of the upper and lower ends of multiple groups of the first cutter disks (4) and the second cutter disks (5). Multiple groups of the first blades (6) and the second blades (7) are rotatably connected to the connecting rods (401). Fixing holes are opened at positions on the inner sides of the fixed disks (3) corresponding to the connecting rods (401). The left and right ends of the connecting rods (401) extend into the inner sides of the fixing holes.

5. A shredder blade according to claim 1, wherein: First intersection areas (605) are provided between multiple groups of the first blades (6), and second intersection areas (702) are provided between multiple groups of the second blades (7). The first intersection areas (605) are adapted to be used with the second blades (7), and the second intersection areas (702) are adapted to be used with the first blades (6).

6. A shredder knife according to claim 1, characterized in that: Protrusions (703) are provided at the middle positions on the outer sides of multiple groups of the second blades (7). The protrusions (703) and the second blades (7) are of an integral structure design.

Images