Blade structure of paper shredder

Abstract

The utility model discloses a paper shredder blade structure, and relates to the technical field of paper shredders. The blade body comprises an annular tool bit and a mounting circular plate, the mounting circular plate and the annular tool bit are coaxial and staggered in the axial direction, the mounting circular plate and the annular tool bit are connected through a connecting part, a tubular stretching part is arranged on one side of the mounting circular plate in a protruding mode, and an inner hole of the stretching part is polygonal. Therefore, the problems of an existing paper shredder are solved, the contact area of the blade and the rotating shaft is increased, slipping is avoided, meanwhile, the mounting efficiency of the blade is improved, and mounting and dismounting are more convenient.

Description

Technical Field

[0001] The present application relates to the technical field of paper shredders, and in particular to a blade structure of a paper shredder. Background Art

[0002] A shredder has two main components: a paper cutter and an electric motor, which are tightly connected by belts and gears. The motor drives the belts and gears to transfer energy to the paper cutter, which rotates and uses its sharp metal corners to cut paper into pieces.

[0003] A paper cutter generally consists of a rotating shaft and several blades installed on the rotating shaft. A spacer sleeve needs to be installed at a fixed position on the rotating shaft, and a plug plate is installed at the position of the spacer sleeve. Since there are many blades installed on the rotating shaft, it is necessary to count the number of blades before installing the spacer sleeve and the plug plate. It is easy to make mistakes during installation, so it needs to be disassembled and reinstalled. When working, the rotating shaft rotates, driving several blades to rotate for paper shredding. The contact area between the blade and the rotating shaft is small, and it is easy for the blade and the rotating shaft to slip. There is a gap between the blades, and generally a positioning sleeve is needed for spacing. During installation, the blade and the positioning sleeve need to be installed in sequence, and the installation efficiency is very low. Utility Model Content

[0004] In order to solve the above-mentioned problems, increase the contact area between the blade and the rotating shaft, avoid slipping, and improve the installation efficiency of the blade, the present application provides a shredder blade structure.

[0005] The present application provides a shredder blade structure that adopts the following technical solution.

[0006] A shredder blade structure includes a blade body;

[0007] The blade body includes an annular cutter head and a mounting circular plate. The mounting circular plate is coaxial with the annular cutter head and staggered along the axial direction. The mounting circular plate and the annular cutter head are connected via a connecting portion. A tubular stretching portion is protruding from one side of the mounting circular plate, and the inner hole of the stretching portion is polygonal.

[0008] By adopting the above technical solution, the mounting circular plate and the annular cutter head are coaxially connected through the connecting part and are staggered in the axial direction. A stretching part is protruding on one side of the mounting circular plate. When the blade body is installed, the contact area between the blade body and the rotating shaft, that is, the mounting matching area, is increased by setting the stretching part, and slipping is not easy to occur. The inner hole is polygonal and can better match the rotating shaft, so that the mounting circular plate can directly match the rotating shaft coaxially and be driven to rotate by the rotating shaft, and no coaxial fixed connection is required.

[0009] Optionally, the stretching portion is located on a side of the mounting circular plate away from the annular cutter head.

[0010] By adopting the above technical solution and setting the stretching part, the contact area between the blade body and the rotating shaft is increased, which makes it less prone to slipping. In addition, the insert plate can be directly installed without installing a spacer sleeve and without worrying about incorrect installation position.

[0011] Optionally, the stretching portion is located on a side of the mounting circular plate close to the annular cutter head.

[0012] By adopting the above technical solution and setting the stretching part, the contact area between the blade body and the rotating shaft is increased, which is not easy to slip, and plays a role of spacing between the blade bodies. There is no need to install a positioning sleeve separately, which improves the convenience of installation.

[0013] Optionally, the stretching portion includes a ring, one end of which is connected to the mounting circular plate.

[0014] By adopting the above technical solution, the setting of the collar can cooperate with the rotating shaft to increase the contact area between the blade body and the rotating shaft when the blade body is installed.

[0015] Optionally, the outer surface of the collar has the same cross-sectional profile as the inner hole.

[0016] Optionally, the outer surface profile of the collar is circular.

[0017] Optionally, the connecting portion comprises a cylindrical ring, one end of the cylindrical ring is connected to the mounting circular plate, and the other end of the cylindrical ring is connected to the annular cutter head.

[0018] Optionally, the diameter of one end of the cylindrical ring is smaller than the diameter of the other end.

[0019] By adopting the above technical solution, the diameter of one end of the cylindrical ring is smaller than the diameter of the other end, that is, the diameter of the end close to the mounting circular plate is smaller than the diameter of one end of the annular cutter head.

[0020] Optionally, the edge of the annular cutter head is serrated.

[0021] By adopting the above technical solution, the serrated shape makes the annular cutter head more capable of cutting, which is beneficial to improving the paper shredding ability.

[0022] In summary, this application at least includes the following beneficial effects:

[0023] 1. A shredder blade structure disclosed in the present application includes a blade body; the blade body includes an annular cutter head and a mounting circular plate, the mounting circular plate is coaxial with the annular cutter head and staggered in the axial direction, the mounting circular plate and the annular cutter head are connected by a connecting portion, one side of the mounting circular plate is protruded with a tubular stretching portion, and the inner hole of the stretching portion is polygonal. The mounting circular plate and the annular cutter head are coaxially connected by the connecting portion and staggered in the axial direction, and one side of the mounting circular plate is protruded with a stretching portion. When the blade body is installed, the contact area between the blade body and the rotating shaft, that is, the installation matching area, is increased by the provision of the stretching portion, and slipping is not easy to occur. The polygonal inner hole can better match the rotating shaft, so that the mounting circular plate can directly match the rotating shaft coaxially and be driven to rotate by the rotating shaft, and no coaxial fixed connection is required.

[0024] 2. The stretching portion disclosed in the present application is located on the side of the mounting circular plate away from the annular cutter head, which increases the contact area between the blade body and the rotating shaft, is not easy to slip, and the plug plate can be directly installed without worrying about the wrong installation position.

[0025] 3. The stretching portion disclosed in the present application is located on the side of the mounting circular plate close to the annular cutter head, which increases the contact area between the blade body and the rotating shaft, is not easy to slip, and serves as a spacing between the blade bodies. There is no need to install a positioning sleeve separately, which improves the convenience of installation.

[0026] 4. The edge of the annular cutter head in the present application is serrated, which makes the annular cutter head more capable of cutting and is conducive to improving the paper shredding ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a schematic diagram of the blade structure in Example 1.

[0029] Figure 2 It is a schematic cross-sectional view of the blade structure in Example 1.

[0030] Figure 3 This is a schematic diagram of the blade structure installation in Example 1.

[0031] Figure 4 This is a schematic diagram of the blade structure in Example 2.

[0032] Figure 5 It is a schematic cross-sectional view of the blade structure in Example 2.

[0033] Figure 6 This is a schematic diagram of the blade structure installation in Example 2.

[0034] Explanation of the reference numerals: 1. annular cutter head; 2. mounting circular plate; 3. connecting portion; 4. stretching portion; 5. inner hole; 6. rotating shaft; 7. positioning sleeve. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] The following is combined with Figures 1 to 6 This application is described in further detail.

[0037] The embodiment of the present application discloses a blade structure for a shredder.

[0038] Example 1

[0039] Reference Figures 1 to 3 , a shredder blade structure, including a blade body.

[0040] The blade body includes an annular cutter head 1, a mounting circular plate 2, a connecting portion 3 and a stretching portion 4. The annular cutter head 1 is coaxial with the mounting circular plate 2 and is staggered along the axial direction. The mounting circular plate 2 and the annular cutter head 1 are fixed by the connecting portion 3. A tubular stretching portion 4 is protruding from one side of the mounting circular plate 2 away from the annular cutter head 1, and the cross-section of the inner hole 5 of the stretching portion 4 is polygonal.

[0041] The inner hole 5 has a polygonal cross section, which can better cooperate with the rotating shaft 6, so that the mounting circular plate 2 can directly cooperate coaxially with the rotating shaft 6 and be driven to rotate by the rotating shaft 6, and no coaxial fixed connection is required.

[0042] The edge of the annular cutter head 1 is serrated, which makes the annular cutter head 1 more capable of cutting and is conducive to improving the paper shredding ability.

[0043] The stretching portion 4 includes a collar, which is tubular and 1-3 mm long. One end of the collar is fixedly connected to the mounting circular plate 2. The cross-sectional profile of the outer surface of the collar is the same as the cross-sectional profile of the inner hole 5. The cross-sectional profile of the outer surface of the collar can also be circular. The setting of the collar can cooperate with the rotating shaft 6 to increase the contact area between the blade body and the rotating shaft 6 when the blade body is installed.

[0044] The connecting part 3 includes a cylindrical ring, one end of the cylindrical ring is fixedly connected to the mounting circular plate 2, and the other end of the cylindrical ring is fixedly connected to the annular cutter head 1. The annular cutter head 1, the cylindrical ring, and the mounting circular plate 2 can be an integrated structure with rounded corners at appropriate positions. The diameter of one end of the cylindrical ring is smaller than the diameter of the other end, that is, the diameter of the end close to the mounting circular plate 2 is smaller than the diameter of one end of the annular cutter head 1.

[0045] The mounting circular plate 2 and the annular cutter head 1 are coaxially connected through the connecting portion 3 and are staggered in the axial direction. A stretching portion 4 is protruding from one side of the mounting circular plate 2. When the blade is installed, the contact area between the blade body and the rotating shaft 6, i.e., the installation matching area, is increased through the setting of the stretching portion 4, so that slipping is not easy to occur.

[0046] During installation, it is only necessary to sleeve the blade structure disclosed in the present application on the rotating shaft 6 through the inner hole 5. The cross section of the rotating shaft 6 is hexagonal. Two blade bodies form a group and are relatively installed on the rotating shaft 6 so that the stretching parts 4 of the two blade bodies are against each other, so that the two annular cutter heads 1 in a group are spaced apart. The plug plate can be directly installed without installing a spacing sleeve, and there is no need to worry about the wrong installation position. At the same time, each group is spaced apart by a positioning sleeve 7 to achieve a spaced distribution between each group. Figure 3 , which is an installation method of the blade structure disclosed in this application.

[0047] Example 2

[0048] Reference Figures 4 to 6 , a shredder blade structure, including a blade body.

[0049] The blade body includes an annular cutter head 1, a mounting circular plate 2, a connecting portion 3 and a stretching portion 4. The annular cutter head 1 is coaxial with the mounting circular plate 2 and is staggered along the axial direction. The mounting circular plate 2 and the annular cutter head 1 are fixed by the connecting portion 3. The stretching portion 4 is protrudingly provided on one side of the mounting circular plate 2 close to the annular cutter head 1. An inner hole 5 is opened through the axis of the mounting circular plate 2, and the cross-section of the inner hole 5 is polygonal.

[0050] The inner hole 5 has a polygonal cross section, which can better cooperate with the rotating shaft 6, so that the mounting circular plate 2 can directly cooperate coaxially with the rotating shaft 6 and be driven to rotate by the rotating shaft 6, and no coaxial fixed connection is required.

[0051] The edge of the annular cutter head 1 is serrated, which makes the annular cutter head 1 more capable of cutting and is conducive to improving the paper shredding ability.

[0052] The stretching portion 4 includes a collar, which is tubular and 1-3 mm in length. One end of the collar is fixedly connected to the mounting circular plate 2. The cross-sectional profile of the outer surface of the collar is the same as the cross-sectional profile of the inner hole 5. The cross-sectional profile of the outer surface of the collar can also be circular. The setting of the collar can cooperate with the rotating shaft 6 to increase the contact area between the blade body and the rotating shaft 6 when installing, which is not easy to slip, and plays a role of spacing between the blade bodies. It is no longer necessary to install a positioning sleeve 7 separately, which improves the convenience of installation.

[0053] The connecting part 3 includes a cylindrical ring, one end of the cylindrical ring is fixedly connected to the mounting circular plate 2, and the other end of the cylindrical ring is fixedly connected to the annular cutter head 1. The annular cutter head 1, the cylindrical ring, and the mounting circular plate 2 can be an integrated structure with rounded corners at appropriate positions. The diameter of one end of the cylindrical ring is smaller than the diameter of the other end, that is, the diameter of the end close to the mounting circular plate 2 is smaller than the diameter of one end of the annular cutter head 1.

[0054] The mounting circular plate 2 is coaxially connected to the annular cutter head 1 through the connecting portion 3 and arranged staggered along the axial direction. The mounting circular plate 2 is provided with a stretching portion 4 protruding from one side of the annular cutter head 1. When the blade is installed, the contact area between the blade body and the rotating shaft 6, that is, the installation matching area, is increased through the setting of the stretching portion 4, and slipping is not easy to occur. In addition, the setting of the stretching portion 4 plays a role of spacing between the blade bodies, and it is no longer necessary to install a positioning sleeve 7 separately, thereby improving the convenience of installation and the efficiency of installation.

[0055] During installation, it is only necessary to sleeve the blade structure disclosed in the present application onto the rotating shaft 6 through the inner hole 5. The cross section of the rotating shaft 6 is hexagonal. Two blade bodies form a group and are relatively installed on the rotating shaft 6 so that the mounting circular plates 2 of the two blade bodies are against each other, and the stretching parts 4 of the two annular cutter heads 1 between the two groups are against each other, thus achieving a spaced distribution without installing a positioning sleeve 7 for spacing. Figure 3 , which is an installation method of the blade structure disclosed in this application.

[0056] In the description of the present invention, it should be understood that the terms "one end", "two ends", "one side", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the term "connection" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal connection of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0057] The above are only preferred embodiments of the utility model and are not intended to limit the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A shredder blade structure, characterized in that: including a blade body; The blade body includes an annular cutter head and a mounting circular plate. The mounting circular plate is coaxial with the annular cutter head and staggered along the axial direction. The mounting circular plate and the annular cutter head are connected via a connecting portion. A tubular stretching portion is protruding from one side of the mounting circular plate, and the inner hole of the stretching portion is polygonal.

2. A shredder blade structure according to claim 1, characterized in that: The stretching portion is located at a side of the mounting circular plate away from the annular cutter head.

3. A shredder blade structure according to claim 1, characterized in that: The stretching portion is located on a side of the mounting circular plate close to the annular cutter head.

4. A shredder blade structure according to claim 1, characterized in that: The stretching portion comprises a collar, one end of which is connected to the mounting circular plate.

5. A shredder blade structure according to claim 4, characterized in that: The outer surface of the collar has the same cross-sectional profile as the inner hole.

6. A shredder blade structure according to claim 4, characterized in that: The outer surface contour of the collar is circular.

7. A shredder blade structure according to claim 1, characterized in that: The connecting portion comprises a cylindrical ring, one end of which is connected to the mounting circular plate, and the other end of which is connected to the annular cutter head.

8. A shredder blade structure according to claim 7, characterized in that: The diameter of one end of the cylindrical ring is smaller than the diameter of the other end.

9. A shredder blade structure according to claim 1, characterized in that: The edge of the annular cutter head is serrated.

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