CN114273037B - Combined cutter of file crusher and cutter tooth structure thereof - Google Patents
Combined cutter of file crusher and cutter tooth structure thereof Download PDFInfo
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- CN114273037B CN114273037B CN202111612870.0A CN202111612870A CN114273037B CN 114273037 B CN114273037 B CN 114273037B CN 202111612870 A CN202111612870 A CN 202111612870A CN 114273037 B CN114273037 B CN 114273037B
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Abstract
The invention discloses a combined cutter of a file crusher and a cutter tooth structure thereof, wherein a cutting unit in the cutter tooth structure comprises a blade groove, a rear blade and a front blade, the blade groove consists of a bottom edge, a front side edge and a rear side edge which are vertically arranged, and the height of the front side edge is smaller than that of the rear side edge; the rear cutting edge is formed by a first line segment which is obliquely extended outwards from the front endpoint of the front side edge; the front cutting edge is formed by a second line segment which is obliquely extended outwards from the front endpoint of the rear cutting edge; the length of the first line segment is greater than that of the second line segment, and the included angle between the first line segment and the second central line is greater than that between the second line segment and the second central line. According to the invention, by reducing the depth of the blade groove, eliminating the back of the knife and increasing the length of the rear blade, the stretching acting force is reduced and the cutting acting force is enhanced in the process of mutually meshing the first cutter and the second cutter for cutting paper, and each action of the first cutter and the second cutter eats materials, so that the processing capacity is greatly improved.
Description
Technical Field
The invention relates to the technical field of file crushing equipment, in particular to a combined cutter of a file crusher and a cutter tooth structure of the combined cutter.
Background
Nowadays, in various fields such as industry, business and national defense, more and more attention is paid to the destruction work of confidential documents, and therefore, the confidential documents are mostly smashed into fragments by a document smashing machine so as to avoid divulgence.
The document shredder can shred the paper scraps by using a combined cutter which consists of a first cutter and a second cutter which are arranged in parallel, wherein the first cutter and the second cutter are provided with a blade and a cutter groove at intervals, and the blade and the cutter groove on the two cutters are meshed with each other to shred the paper scraps. As shown in fig. 7, in the prior art, a plurality of cutting units are arranged on a blade 10 in a head-to-tail connection manner along the circumferential direction, each cutting unit is composed of a front cutting edge 11, a cutting edge groove 12, a rear cutting edge 13 and a back 14 which are connected in sequence, wherein the depth of the cutting edge groove 12 is greater than 12mm, and the paper is eaten deeply, so that a tensile acting force is generated on paper in the process of meshing and cutting the paper by a first cutter and a second cutter, therefore, the handling capacity is only 600-800 kg per hour, and the requirement of a security department on the mass material destruction capacity cannot be met.
In view of the above, there is a need for an improved gang tool for a document shredder to increase throughput and work efficiency.
Disclosure of Invention
In view of the above-mentioned drawbacks, the present invention provides a combination tool for a document shredder and a cutter tooth structure thereof, so as to solve the problem of small document shredding amount in the prior art.
For this purpose, the cutter tooth structure provided by the invention is provided with a plurality of cutting units which are arranged end to end along the circumferential direction of the blade, and the cutting units comprise:
the blade groove consists of a bottom edge, a front side edge and a rear side edge, wherein the front side edge and the rear side edge are vertically arranged at two ends of the bottom edge, the height of the front side edge is smaller than that of the rear side edge, two mutually perpendicular center lines in the orthographic projection plane of the blade are respectively a first center line and a second center line, and the front side edge is superposed with the second center line;
the rear blade is formed by a first line segment which is obliquely extended outwards from the front endpoint of the front side edge;
the front blade is formed by a second line segment which is obliquely extended outwards from the front endpoint of the rear blade;
the length of the first line segment is greater than that of the second line segment, and the included angle between the first line segment and the second central line is greater than that between the second line segment and the second central line.
In the above technical solution, preferably, the top end of the rear side is connected to the top end of the front blade on the adjacent blade tooth structure.
In the above technical solution, preferably, twelve end-to-end cutting units are provided on the blade.
The invention also discloses a combined cutter of a file crusher, which comprises a first cutter and a second cutter which are arranged in parallel, wherein a plurality of first blades and first cutter grooves are formed on the first cutter at intervals along the axial direction, a plurality of second blades and second cutter grooves are formed on the second cutter at intervals along the axial direction, the first blades are inserted into the second cutter grooves, and the second blades are inserted into the first cutter grooves.
In the above technical solution, preferably, the front cutting edges of the adjacent first and second blades are arranged in a staggered angle.
In the above technical solution, preferably, in the cutting start position, the front end point of the front cutting edge of the first blade is located on a midperpendicular of a connecting arc of two adjacent front cutting edges of the second blade.
In the above technical solution, preferably, a plurality of first cutter groove groups are formed along an axial direction in the blade grooves of the plurality of cutter tooth structures on each blade of the first cutter, and the first cutter groove groups are arranged obliquely with respect to an axis of the first cutter; and the blade grooves in the plurality of blade tooth structures on each blade on the second cutter form a plurality of second blade groove groups along the axial direction, the second blade groove groups are obliquely arranged relative to the axis of the second cutter, and the first blade groove groups and the second blade groove groups intersect in a top projection plane.
In the above technical solution, preferably, the outer diameter of the first cutter is 156mm, the thickness of the first blade is 7.8mm, the width of the first cutter groove is 8mm, the depth of the blade groove is 8mm, the width of the blade groove is 14mm, the arc length of each cutting unit is 40.84mm, and twelve cutting units are arranged on the first blade.
According to the technical scheme, the combined cutter of the file crusher and the cutter tooth structure thereof solve the problem of small processing amount in the prior art. Compared with the prior art, the invention has the following beneficial effects:
through the degree of depth that reduces the sword groove in the cutting unit, cancel the back of a knife blade, increase the length of back cutting edge, make first cutter and second cutter at intermeshing cut paper in-process, reduced because the sword groove is darker and done the tensile effort on the shredded paper, strengthened the effort of cutting off, each action of first cutter and second cutter is all eating into the material, very big improvement the handling capacity.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly described and explained. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic structural diagram of a gang tool of a document shredder according to the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic view of a cutter tooth according to the present invention;
FIG. 4 is an enlarged view of the portion B of FIG. 3;
FIG. 5 is a schematic view of the engagement of the first blade and the second blade in the present invention;
FIG. 6 is an enlarged view of the portion C of FIG. 5;
fig. 7 is a schematic view of a prior art cutter tooth structure.
In fig. 1 to 7, the correspondence between the components is as follows:
a first blade 110, a first slot 120, a first slot group 130, a second blade 210 and a second slot 220, a second slot group 230;
a blade groove 310, a rear blade 320, a front blade 330;
a first line segment 321 and a second line segment 331.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
In order to make the technical solution and implementation of the present invention more clearly explained and illustrated, several preferred embodiments for implementing the technical solution of the present invention are described below.
It should be noted that the terms of orientation such as "inside, outside", "front, back" and "left and right" are used herein as reference objects, and it is obvious that the use of the corresponding terms of orientation does not limit the scope of protection of the present invention.
Referring to fig. 1 and 2, fig. 1 is a schematic structural view of a gang tool of a document shredder according to the present invention, and fig. 2 is an enlarged view of a portion a in fig. 1, and hatching is added to the first blade, the second blade and the corresponding knife shaft in fig. 2 for convenience of description.
As shown in fig. 1 and 2, the combined cutter of the document shredder according to the present invention comprises a first cutter 100 and a second cutter 200, which are arranged in parallel, wherein the parallel means that the axis of the first cutter 100 is parallel to the axis of the second cutter 200.
The first cutter 100 is provided with a plurality of first blades 110 and first grooves 120 at intervals along the axial direction thereof, the second cutter 200 is provided with a plurality of second blades 210 and second grooves 220 at intervals along the axial direction thereof, the first blades 110 are inserted into the corresponding second grooves 220, and the second blades 210 are inserted into the first grooves 120 to form a mutually meshed form, so that the chopping function is realized.
As shown in fig. 3 and 4, the first blade 110 and the second blade 210 are respectively provided with a cutter tooth structure, and the cutter tooth structure is a plurality of cutting units arranged end to end along the circumferential direction of the blade 300, and the cutting units are formed by sequentially connecting a blade groove 310, a rear blade 320 and a front blade 330 in an orthographic projection plane of the blade 300.
The blade groove 310 is composed of a bottom side 311 and a front side 312 and a rear side 313 vertically disposed at both ends of the bottom side 311, where front and rear are defined in the direction of the rotational cutting of the blade, i.e., a portion of the cutting unit where the cutting work is performed first is defined as front, and a portion where the cutting work is performed later is defined as rear.
The height of the front side 312 is less than the height of the rear side 313, the two mutually perpendicular center lines in the orthographic projection of the blade are a first center line X-X and a second center line Y-Y, respectively, and the front side 312 coincides with the second center line Y-Y. The depth of the blade groove 310 is 8mm or less, that is, the height of the rear side 313 is 8mm or less.
The back blade 320 is formed by a first line segment 321 extending obliquely outward from the front end point of the front edge 312, the front blade 330 is formed by a second line segment 331 extending obliquely outward from the front end point of the back blade 320, the length of the first line segment 321 is greater than that of the second line segment 331, and an included angle C1 between the first line segment 321 and the second center line Y-Y is greater than an included angle C2 between the second line segment 331 and the second center line Y-Y. The top of the rear side 313 of the flute 310 engages the top of the front edge on the adjacent tooth structure.
Referring again to fig. 5 and 6, in order to show more clearly, hatching lines of the first blade and the second blade are added in fig. 6, and the overlapped part of the hatching lines shows the superposition in the projection plane, and in fact, because the first blade is inserted into the second blade groove and the second blade is inserted into the first blade groove, the first blade and the second blade are not interfered. In the cutting start position, the front cutting edges of the adjacent first and second blades 110 and 210 are angularly offset. Specifically, in the cutting start position, the forward end point 331 of the forward cutting edge 330 of the first blade 110 is located on the perpendicular bisector D-D of the connecting arc of the forward end points of the adjacent two forward cutting edges of the second blade 210.
Referring again to fig. 1, a plurality of first flutes 130 are axially formed in the flutes of the plurality of tooth structures on each first blade 110 of the first tool 100, and the first flutes 130 are arranged obliquely with respect to the axis of the first tool 100. The blade grooves of the plurality of blade tooth structures on each second blade 210 of the second tool 200 form a plurality of second blade groove groups 230 along the axial direction, the second blade groove groups 230 are obliquely arranged relative to the axial line of the second tool 200, and the first blade groove group 130 and the second blade groove group 230 intersect at one end of the first tool 100 and the second tool 200 in a plane of projection, thereby forming a cross cut, which is different from the parallel cutting of the two tools in the prior art.
In one specific embodiment, the outer diameter of the first cutter is 156mm, the thickness of the first cutter blade is 7.8mm, the width of the first cutter groove is 8mm, the depth of the cutter groove is 8mm, the width of the cutter groove is 14mm, the arc length of each cutting unit is 40.84mm, and twelve cutting units are arranged on the first cutter blade.
With the above description of the specific embodiment, the combined cutter and the cutter tooth structure thereof of the document shredder provided by the invention have the following advantages compared with the prior art:
firstly, in the invention, the depth of the blade groove is reduced to be less than or equal to 8mm, the structure of the blade back is cancelled, the back blade is designed to be in a slope shape, and the length of the back blade is increased, in the operation process, two front blades at two sides of the blade groove catch (commonly called as paper eating) shredded paper, and the shredded paper is cut off through the back blade of the other cutter in the blade groove, because the back blade has the function similar to a guillotine, the linear slope profile shape is adopted, compared with the arc profile (circumscribed circle) in the existing design, the cutting force directly acts on the shredded paper, and the cutting acting force is enhanced; in addition, because the depth of the edge groove is reduced, the tensile acting force acting on the shredded paper is reduced, the first cutter and the second cutter are used for feeding materials, the treatment capacity is greatly improved, and the treatment capacity is improved to about 1500kg from 600-800 kg per hour. In addition, the structure also reduces the machine noise caused by the deep blade groove and large paper feed amount.
And secondly, the first cutter groove group and the second cutter groove group intersect at one end of the first cutter and one end of the second cutter in a plan projection plane, so that cross cutting is formed, and disordered strip-shaped materials are more favorably crushed.
Thirdly, in the cutting starting position, the front end point of the front cutting edge of the first blade is positioned on the perpendicular bisector of the connecting arc of the front end points of the two adjacent front cutting edges of the second blade, namely when the rake face of the first blade is inserted into the second cutter groove, the middle position of the front end points of the two adjacent front cutting edges of the second blade is exactly the middle position of the front end points of the two adjacent front cutting edges of the second blade, which is more favorable for the cutting tool to eat and the cutting is more stable.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The present invention is not limited to the above-mentioned preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
Claims (6)
1. A cutter tooth structure is provided with a plurality of cutting units arranged end to end along the circumference of a blade, and is characterized in that the cutting units comprise in the orthographic projection plane of the blade:
the blade groove consists of a bottom edge, a front side edge and a rear side edge, wherein the front side edge and the rear side edge are vertically arranged at two ends of the bottom edge, the height of the front side edge is smaller than that of the rear side edge, two mutually perpendicular center lines in the orthographic projection plane of the blade are respectively a first center line and a second center line, and the front side edge is superposed with the second center line; the height of the rear side edge is less than or equal to 8mm;
the rear blade is formed by a first line segment which is obliquely extended outwards from the front endpoint of the front side edge;
the front blade is formed by a second line segment which is obliquely extended outwards from the front endpoint of the rear blade;
the length of the first line segment is greater than that of the second line segment, and the included angle between the first line segment and the second central line is greater than that between the second line segment and the second central line.
2. The tooth construction of claim 1 wherein the top end of said trailing side engages the top end of the leading edge of an adjacent tooth construction.
3. The cutter tooth construction according to claim 1 wherein twelve cutting units are provided on said blade in end-to-end relationship.
4. A combination cutter of a document shredder, comprising a first cutter and a second cutter arranged in parallel, the first cutter being provided with a plurality of first blades and first cutter grooves at intervals along an axial direction, the second cutter being provided with a plurality of second blades and second cutter grooves at intervals along the axial direction, the first blades being inserted into the second cutter grooves, the second blades being inserted into the first cutter grooves, characterized in that the first blades and the second blades are respectively provided with the cutter tooth structures as claimed in claim 1;
the front cutting edges of the adjacent first blade and the second blade are arranged in a staggered angle mode;
in the cutting starting position, the front end point of the front cutting edge of the first blade is positioned on the perpendicular bisector of the connecting arc of the front end points of the two adjacent front cutting edges of the second blade.
5. The combination cutter of a document shredder according to claim 4, wherein the blade slots of the plurality of tooth formations on each blade on the first cutter form a plurality of first slot groups in an axial direction, the first slot groups being arranged obliquely with respect to the axis of the first cutter; and the blade grooves in the plurality of blade tooth structures on each blade on the second cutter form a plurality of second blade groove groups along the axial direction, the second blade groove groups are obliquely arranged relative to the axis of the second cutter, and the first blade groove groups and the second blade groove groups intersect in a top projection plane.
6. The combination blade of a document shredder according to claim 4, wherein the first blade has an outer diameter of 156mm, a thickness of 7.8mm, a width of 8mm, a depth of 8mm and a width of 14mm, each cutting unit has an arc length of 40.84mm, and twelve cutting units are provided on the first blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111612870.0A CN114273037B (en) | 2021-12-27 | 2021-12-27 | Combined cutter of file crusher and cutter tooth structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111612870.0A CN114273037B (en) | 2021-12-27 | 2021-12-27 | Combined cutter of file crusher and cutter tooth structure thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114273037A CN114273037A (en) | 2022-04-05 |
| CN114273037B true CN114273037B (en) | 2023-01-13 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102941144B (en) * | 2012-11-20 | 2015-04-08 | 东莞精锐电器五金有限公司 | Single cutting type paper shredding cutter, paper shredding mechanism and paper shredding method |
| EP2946858B1 (en) * | 2014-05-19 | 2019-07-10 | Sandvik Intellectual Property AB | Cutting tool insert and cutting tool insert holder |
| CN206356100U (en) * | 2016-12-27 | 2017-07-28 | 东莞科宝机械刀具有限公司 | Breaker bar |
| CN210359307U (en) * | 2019-08-29 | 2020-04-21 | 江西杰浩硬质合金工具有限公司 | Multi-layer tooth-overlapping forming cutter |
| CN113100013B (en) * | 2021-04-01 | 2022-08-09 | 北京理工大学 | Design method of two-section-edge inserted tooth type special high-speed tapping cutter |
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