CN210303975U

CN210303975U - Double-cutting-edge stretching blade and blade assembly for paper shredder

Info

Publication number: CN210303975U
Application number: CN201921100930.9U
Authority: CN
Inventors: 代居江; 龚新杰
Original assignee: Jiangsu Omi Science Technology Co ltd
Current assignee: Danyang Oumi Office Co ltd
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2020-04-14
Anticipated expiration: 2029-07-15

Abstract

The utility model provides a tensile blade of double-edged mouth and blade subassembly for kneader belongs to the official working field, and it includes cutting edge and blade main part, cutting edge and the integrative design of blade main part, be equipped with axle center hole, its characterized in that in the blade main part: the cutter blade is characterized in that a boss and a countersunk head are arranged at the axis hole, the boss and the countersunk head and the cutter blade body are integrally designed, the boss protrudes from one side surface of the cutter blade body, the protruding outer periphery of the boss is in a smooth annular shape, the countersunk head is recessed in the other side surface of the cutter blade body, the recessed inner periphery of the countersunk head is in a smooth annular shape, and the recessed height of the countersunk head is smaller than the protruding height of the boss. Blade group structure is reliable, low cost, and the sword stick plastics space ring of can canceling for kneader sword stick threading tool equipment speed improves kneader assembly operating time efficiency, reduces the assembly cost.

Description

Double-cutting-edge stretching blade and blade assembly for paper shredder

Technical Field

The invention belongs to the field of office appliances, and particularly relates to a stretching blade and a blade set for a paper shredder.

Background

With the progress of society and the development of technology, companies or individuals pay more and more attention to conservative technical innovation or trade secrets, and particularly, waste paper with technical innovation or trade secrets is not discarded at will, but is processed into fragments by paper shredders, which are daily office supplies capable of rapidly shredding confidential documents, and the demand of paper shredders is increasing. The market competition of paper shredders is becoming more and more sensitive to the cost of paper shredders, and the performance and quality requirements for the amount of paper shredded are also becoming higher and higher, and how to achieve the most efficient operation of paper shredders with lower cost is becoming an important research topic.

The conventional paper shredder cutter comprises two cylindrical hobs rotating in opposite directions, wherein each hob comprises a polygonal cutter shaft and a plurality of blade sets sleeved on the cutter shaft. Each blade group comprises two blades which are installed in a combined mode, and the centers of the two blades are provided with shaft center holes matched with the cross sections of the cutter shafts. A spacer bush is arranged between two adjacent blade sets to separate the blade sets, so that the blade sets on the two cylindrical hobs can be assembled in a staggered mode. The polygonal shaft center hole of the blade is formed by punching the center of the blade by utilizing a punching technology to form a polygonal shaft center hole matched with a polygonal shaft, and the punched central hole material becomes waste and cannot be utilized. And the shaft ring is required to be arranged between two adjacent blade sets, so that the cost is increased, and the assembling working hour of the cutter set of the paper shredder is increased.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a double-cutting-edge stretching blade and a blade component for a paper shredder, which have the advantages of simple structure and low cost, can eliminate a plastic spacer ring of a knife bar, accelerate the assembly speed of the knife bar of the paper shredder, improve the effective working time of the paper shredder and reduce the assembly cost.

In order to achieve the purpose of the invention, the invention adopts the technical scheme that: the utility model provides a tensile blade of double knives edge for kneader, it includes cutting edge and blade main part, cutting edge and the integrative design of blade main part, be equipped with axle center hole, its characterized in that in the blade main part: the cutter blade is characterized in that a boss and a countersunk head are arranged at the axis hole, the boss and the countersunk head and the cutter blade body are integrally designed, the boss protrudes from one side surface of the cutter blade body, the protruding outer periphery of the boss is in a smooth annular shape, the countersunk head is recessed in the other side surface of the cutter blade body, the recessed inner periphery of the countersunk head is in a smooth annular shape, and the recessed height of the countersunk head is smaller than the protruding height of the boss.

Furthermore, the double-cutting-edge stretching blade for the paper shredder is characterized in that the shaft center hole is a through hole with an inner circumference surface at intervals of convex and concave.

The invention also discloses a blade component of a paper shredder, which uses the double-cutting-edge stretching blade and is characterized in that: still include arbor, paper blocking device and N tensile blade, N > 2, tensile blade passes the arbor, the countersunk head of tensile blade is coincide each other with the boss of adjacent tensile blade, and remains between two tensile blades and have the interval space, the paper blocking device also is equipped with the axle center semicircle orifice, the axle center semicircle orifice of paper blocking device install in the boss department of tensile blade to set up the interval space department between two tensile blades, N tensile blade reaches the paper blocking device loops through above-mentioned mode and install in on the arbor, constitute kneader blade subassembly.

The invention has the beneficial effects that: according to the double-cutting-edge stretching blade and the blade assembly for the paper shredder, the blade can be formed on a punching machine by one-step pressing through a special die, and the requirement of mass production can be met;

the structure of the blade group is reliable, the cost is low, and after the structure of the blade group is adopted, the plastic spacing ring of the cutter bar can be eliminated, the speed of assembling the cutter bar of the paper shredder through the cutter is accelerated, the effective working time of the paper shredder assembly is prolonged, and the assembly cost is reduced.

Drawings

FIG. 1 is a schematic view of the combination of long and short cutter shafts in a shredder in the prior art.

FIG. 2 is a schematic view of the combination of long and short cutter shafts without a paper stop in a shredder of the prior art.

FIG. 3 is a schematic front view (smooth side) of a prior art shredder cutting blade.

FIG. 4 is a schematic diagram of the blade assembly of the shredder of the present invention.

Fig. 5 is a schematic front view of a double-edged stretch blade for a shredder according to the invention.

Fig. 6 is a rear view of a double edge stretching blade for a shredder according to the present invention.

FIG. 7 is a partial schematic view of a shredder blade assembly of the present invention.

FIG. 8 is a schematic view of the shredder blade assembly of the present invention shown in section B-B.

Wherein, 1 is a long cutter shaft, 2 is a short cutter shaft, 3 is a shaft ring, 4 is an existing cutter blade, 5 is an existing paper stopper, 6 is a smooth side surface of the existing cutter blade, 7 is a double-cutting-edge stretching blade, 8 is a cutter shaft, and 9 is a paper stopper;

71 is a cutting edge, 72 is a blade body, 73 is an axial hole, 74 is a boss, 75 is a countersunk head, 76 is a protruded outer peripheral surface, 77 is a sunken inner peripheral surface, and 78 is a through hole with the inner peripheral surface being in convex-concave alternation.

Detailed Description

The invention is described in further detail below with reference to specific embodiments and with reference to the following drawings.

As shown in fig. 1, 2 and 3, in the blade and the blade group for the paper shredder in the prior art, the front and back sides of the blade are smooth sides without outward steps, the blade group comprises a long cutter shaft 1, a short cutter shaft 2, a shaft ring 3, an existing cutter blade 4 and an existing paper stopper 5, the blades are spaced from the blades through the shaft ring of the cutter shaft, and the paper stopper 5 is arranged on the shaft ring and connected in sequence. Both sides of the existing cutting blade are smooth sides, see the front schematic view of the cutting blade in fig. 3, and 6 is the smooth side of the existing cutting blade. FIG. 2 is a schematic view of a combination of long and short cutter shafts without a paper stop in a shredder in the prior art, and is intended to show the position of a collar.

As shown in fig. 4, 5 and 6, the double-edge stretching blade for a shredder of the present embodiment includes a blade 71 and a blade body 72, the blade 71 and the blade body 72 are integrally designed, the blade body 72 is provided with an axial hole 73, the axial hole 73 is provided with a boss 74 and a counter sink 75, the boss 74 and the counter sink 75 are integrally designed with the blade body 72, the boss 74 protrudes out of one side surface of the blade body 72, a protruding outer peripheral surface 76 of the boss 74 is in a smooth ring shape, the counter sink 75 is recessed into the other side surface of the blade body 72, a recessed inner peripheral surface 77 of the counter sink 75 is in a smooth ring shape, and a recessed height of the counter sink 75 is smaller than a protruding height of the boss 74. The axial hole 73 is a through hole 78 with an inner circumference surface arranged in a convex-concave alternating manner.

Another embodiment of the present invention is a blade assembly comprising the above-mentioned double-edge stretching blades 7, a knife shaft 8, a paper stopper 9 and N double-edge stretching blades, N > 2, wherein the double-edge stretching blades 7 pass through the knife shaft 8, a countersunk head 75 of each double-edge stretching blade 7 is fitted with a boss 74 of an adjacent stretching blade, a spacing space is reserved between the two stretching blades, the paper stopper 9 is also provided with an axial semicircular hole, the axial semicircular hole of the paper stopper 9 is installed at the boss 74 of the stretching blade and is installed at the spacing space between the two stretching blades, and the N double-edge stretching blades 7 and the paper stopper 9 are sequentially installed on the knife shaft 8 in the above-mentioned manner to form a shredder blade assembly.

FIG. 7 is a partial schematic view of a shredder blade assembly of the present invention. FIG. 8 is a schematic view of the shredder blade assembly of the present invention shown in section B-B.

The stretching blade can be formed on a punching machine by one-step pressing by using a special die, and can meet the requirement of mass production; the inner diameter flanging of the blade is stretched and leveled by using raw material steel for a special die, the flanging stretches the root surface round angle, and the flanging stretching bottom surface and the back surface of 3 or more stretching blades are provided with plane stress surfaces instead of points. After the structure of the blade group is adopted, the plastic spacing ring of the cutter bar can be eliminated, the speed of assembling the cutter bar of the paper shredder through the cutter is accelerated, the effective working time of the paper shredder is prolonged, and the assembling cost is reduced.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a tensile blade of double knives edge for kneader, it includes cutting edge and blade main part, cutting edge and the integrative design of blade main part, be equipped with axle center hole, its characterized in that in the blade main part: the cutter blade is characterized in that a boss and a countersunk head are arranged at the axis hole, the boss and the countersunk head and the cutter blade body are integrally designed, the boss protrudes from one side surface of the cutter blade body, the protruding outer periphery of the boss is in a smooth annular shape, the countersunk head is recessed in the other side surface of the cutter blade body, the recessed inner periphery of the countersunk head is in a smooth annular shape, and the recessed height of the countersunk head is smaller than the protruding height of the boss.

2. The double-edge-stretching blade for a paper shredder according to claim 1, wherein: the axial hole is a through hole with convex-concave alternate inner circumference surface.

3. A shredder blade assembly using the tension blade of claim 1, wherein: still include arbor, paper blocking device and N tensile blade, N > 2, tensile blade passes the arbor, the countersunk head of tensile blade is coincide each other with the boss of adjacent tensile blade, and remains between two tensile blades and have the interval space, the paper blocking device also is equipped with the axle center semicircle orifice, the axle center semicircle orifice of paper blocking device install in the boss department of tensile blade to set up the interval space department between two tensile blades, N tensile blade reaches the paper blocking device loops through above-mentioned mode and install in on the arbor, constitute kneader blade subassembly.