CN201168633Y - Cutter shaft assembly of paper shredder - Google Patents

Abstract

The utility model discloses a kneader's arbor subassembly convenient to processing, it includes the arbor and installs the epaxial blade of arbor, and more than one shallow slot has been seted up on the surface of this arbor, corresponds the shallow slot on the mounting hole inner edge of blade and is formed with the bump that matches with it. Shallow slots on the cutter shaft are spirally and uniformly distributed along the axial direction of the cutter shaft, and the blades are spirally and uniformly arranged on the cutter shaft through the matching of the shallow slots and the salient points. After the technical scheme is adopted, the spiral shallow grooves on the cutter shaft are small in groove depth, the spiral shallow grooves can be simultaneously machined along with the section of the cutter shaft integrally through a cold drawing process without additional milling, so that the cutter shaft machining cost can be saved to a great extent, meanwhile, the grooves are spiral, and only the convex points matched with the spiral shallow grooves of the cutter shaft need to be made in the mounting holes of the blades, so that the cutter points of the blades arranged on the cutter shaft can be distributed along with the spiral of the shallow grooves, and the function of dispersing the torque required by cutting paper is achieved.

Description

Shredder Shaft Assemblies

Technical field:

The utility model relates to the technical field of paper shredder products, in particular to a cutter shaft assembly of a paper shredder which is convenient for processing.

Background technique:

Improper collection of discarded manuscript paper will bring a lot of trouble to our work, and even cause serious consequences for business safety. In the past, the method of incineration was used for collection, which not only required a site for incineration, but also caused serious air pollution. In order to change this situation, various paper shredders have come out.

The structure of the shredding part inside the traditional paper shredder is generally driven by a motor to drive a series of transmission and transmission mechanisms to output lower speed and higher torque to the two pairs of cutter shaft assemblies with multiple pairs of shredding blades. As shown in Figure 1, the blade 3 of the pulverizing shredder is generally disc-shaped, and is composed of a blade 31 that can cut the paper longitudinally and a blade 32 that can cut and tear the paper horizontally. The hole or D-shaped hole or D-like hole is installed on the paper shredder cutter shaft 4. Of course, the cross-sectional shape of the cutter shaft 4 where the blade 3 is installed is polygonal or D-shaped hole or D-like shape correspondingly, and a plurality of blades 3 Evenly spaced, the blade tips 321 of the blades 32 are arranged in a staggered arrangement and installed in the shredding area of the entire cutter shaft 4 . The purpose of the staggered and scattered arrangement of the knife tips 321 is to evenly distribute the force of the knife tips to pierce or pull the paper apart during the rotating paper cutting process of the knife shaft 4, so as to avoid the phenomenon of uneven torque required in the paper shredding process.

In order to realize above-mentioned blade tips 321 are staggered and dispersedly arranged on the entire circumference of the cutter shaft 4, the usual practice is that the section of the cutter shaft 4 and the shape of the blade mounting hole are polygonal, such as the hexagon shown in Figure 1. And the positions of the knife tips 321 of different groups of blades 3 are different relative to the angles of the polygonal holes, as shown in Fig. However, there are many types of blades, and the assembly on the production line needs to be sorted and installed sequentially, which is not conducive to its work efficiency.

See Fig. 3, another traditional method is to process the knife hole 33, so that the inner edge of the knife hole 33 forms a uniform tooth groove 331, and the cutter shaft 4 is processed into a polygon that matches the tooth groove 331, so that the blade 3 is installed At the same time, the spiral distribution can be formed by the deflection of the blade, but the processing of this method is more complicated, the process is too slow, and the price is expensive.

Of course, there are still many ways to realize the spiral fit between the cutter shaft and the blade, but the processing of these cutter shaft components is relatively complicated, resulting in high cost of the product.

Utility model content:

The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a cutter shaft assembly of a paper shredder which is easy to process and low in cost.

In order to solve the above technical problems, the utility model adopts the following technical scheme: the cutter shaft and the blade installed on the cutter shaft, the surface of the cutter shaft is provided with more than one shallow groove, and the inner edge of the blade mounting hole corresponds to the shallow groove Matching bumps are formed.

The shallow grooves on the cutter shaft are spirally evenly distributed along the axial direction of the cutter shaft, and the blade is evenly mounted on the cutter shaft in a spiral shape through the shallow grooves and the protrusions.

The shallow groove on the cutter shaft is processed and formed together with the cutter shaft through a cold drawing process.

After the utility model adopts the above-mentioned technical scheme, the groove depth of the spiral shallow groove on the cutter shaft is small, and it does not need to be processed by milling, and can be processed simultaneously with the section of the cutter shaft by a cold drawing process, so that it can be easily It saves the processing cost of the cutter shaft to a great extent, and at the same time, the groove is helical, and the installation hole of the blade only needs to be made into a convex point that matches the shallow spiral groove of the cutter shaft, so that the installation on the cutter shaft can be realized. The tip of the blade is helically distributed with the shallow groove to achieve the function of distributing the torque required to cut the paper.

Description of drawings:

Fig. 1 is a schematic cross-sectional view of an existing cutter shaft assembly;

Fig. 2 is a schematic diagram of adjacent blades in the cutter shaft assembly of Fig. 1;

Fig. 3 is a perspective view of another existing cutter shaft assembly;

Fig. 4 is a three-dimensional structure diagram of the utility model cutter shaft;

Fig. 5 is the schematic diagram of the utility model blade;

Fig. 6 is a perspective view of the utility model.

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is further described:

See Fig. 4, 5, 6, the utility model comprises cutter shaft 1 and the blade 2 that is installed on the cutter shaft 1. The cutter shaft 1 is a circular (or nearly circular) cross-section, and more than one shallow groove 11 is provided on the surface of the cutter shaft 1, and four shallow grooves 11 are provided in this embodiment. The inner edge of the mounting hole 20 of the blade 2 is formed with a matching convex point 21 corresponding to the shallow groove 11 . Wherein, the shallow grooves 2 on the cutter shaft 1 are helically and evenly distributed along the axial direction of the cutter shaft, and the blade 2 is evenly and spirally installed on the cutter shaft 1 through the shallow grooves 11 and the bumps 21 .

The shallow groove 2 on the cutter shaft 1 is processed and formed together with the cutter shaft 1 through the cold drawing process. After the utility model adopts the above technical solution, the groove depth of the spiral shallow groove 11 on the cutter shaft 1 is relatively small, and it does not It needs to be additionally processed by milling, which can be processed simultaneously with the cross section of the cutter shaft 1 by a cold drawing process (the specific processing adopts uniform rotation during the cold drawing process), so that the processing cost of the cutter shaft 1 can be greatly saved. The groove 11 is helical, and the installation hole 20 of the blade 2 only needs to be made into a convex point 21 that matches the shallow spiral groove 11 of the cutter shaft, so that the tip of the blade 2 installed on the cutter shaft 1 can be realized. 22 is spirally distributed with the shallow groove to achieve the function of dispersing the torque required for cutting the paper.

Of course, the above is only an embodiment of the utility model, and is not intended to limit the scope of implementation of the utility model. For example, the number of shallow grooves 2 can be designed according to the situation, and can be two, three, five, etc. Equivalent changes or modifications made to the structures, features and principles described in the scope of the patent shall be included in the patent scope of the utility model.

Claims (3)

1. A cutter shaft assembly of a paper shredder, comprising: a cutter shaft (1) and a blade (2) mounted on the cutter shaft (1), characterized in that: the surface of the cutter shaft (1) is provided with a The above shallow groove (11), the corresponding shallow groove (11) on the inner edge of the mounting hole (20) of the blade (2) is formed with a convex point (21) matching therewith. 2. The cutter shaft assembly of a paper shredder according to claim 1, characterized in that: the shallow grooves (2) on the cutter shaft (1) are helically distributed along the axial direction of the cutter shaft, and the blade (2) passes through The shallow groove (11) and the protruding point (21) are spirally installed on the cutter shaft (1). 3. The cutter shaft assembly of a paper shredder according to claim 1, characterized in that: the shallow groove (2) on the cutter shaft (1) is formed integrally with the cutter shaft (1) through a cold drawing process.

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