CN210849871U

CN210849871U - Knife sharpening sheet and knife sharpener using same

Info

Publication number: CN210849871U
Application number: CN201921351926.XU
Authority: CN
Inventors: 冯建峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-06-26
Anticipated expiration: 2029-08-20

Abstract

The utility model provides a sharpedge grinding piece and use sharpener of this sharpedge grinding piece, include: the four edges are equal in length, and convex or concave grinding blades for fixing are arranged at two ends of the four edges. The sharpener comprises a sharpening blade, a sharpening blade fixing device and a sharpening frame, wherein a sharpening blade fixing groove is directly arranged on the sharpening frame or is arranged through a sharpening blade support. The sharpening sheets are detachably arranged in the sharpening sheet fixing grooves. The knife sharpening sheet bracket is axially connected with the knife sharpening frame; two same knife sharpening sheet assemblies are crosswise arranged on the knife sharpening frame in an approximate X shape to form a V-shaped knife sharpening edge. The armrest part on the knife sharpening frame and the knife sharpening sheet component are all in the same central axis and are axially symmetrical. The utility model has the advantages that: the grinding blade is easy to disassemble, assemble and replace; the four edges can be used for sharpening the knife, so that the utilization rate of the sharpening blade is improved; the symmetrical structure, both sides can all sharpen, sharpen the blade subassembly elastic connection, make sharpen the angle changeable, the cutting edge is smooth.

Description

Knife sharpening sheet and knife sharpener using same

The technical field is as follows:

the utility model belongs to the technical field of the sharpener and specifically relates to a sharpener of piece and use this piece whets a knife.

Background art:

at present, the working principle of the knife sharpener using hard alloy as a sharpening blade is that the edges of the sharpening blade are used for cutting two sides of the cutting edge by utilizing the ultra-strong hardness of the hard alloy, so that the knife is sharper. The structure of a dual blade sharpener is generally: two sharpening sheets are alternately arranged in tandem and fixed on a sharpening frame. When in use, one hand holds the knife sharpener and the other hand holds the knife. The cutting edge of the cutter is pressed at the bottom of a V-shaped structure formed by two sharpening blades to draw. Therefore, the edges of the left and right sharpening blades can cut the two sides of the cutting edge. The existing sharpeners in the market are all fixed and clamped on a sharpening frame by sharpening sheets. After the sharpening blade is worn out and failed, the sharpening blade is difficult to replace without a tool. And only two edges facing the center and the edges facing the outer side cannot be used for sharpening. After the inner edge of the sharpening blade is worn, the whole sharpener is scrapped. Thus, the service life of the knife sharpener is limited, and a great deal of waste can be caused. For this reason, the existing grinding blades on the market only grind and polish three planes on which two edges facing inwards are located, so that the two working edges are smooth and sharp. While the two edges facing the outside are not finely machined. Therefore, the service life of the grinding blade is only limited to the two inner edges, and the two outer edges cannot be used or have poor use effect because the two outer edges are not processed.

The utility model has the following contents:

in order to overcome the defects of the existing knife sharpener. The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a sharpening piece, sharpening piece wholly is square rectangular shape or the blade wholly is four rectangular shape of the isometric rectangular shape in long limit, and the cross section of perpendicular to length direction is the rectangle, has the arch or sunken that are used for fixing at length direction's both ends design.

Four planes of four long edges of the grinding blade are ground or polished, so that four edges are smooth and sharp, and the four planes can be equivalently used.

A sharpener for using the sharpening blade, comprising: the sharpening device comprises a sharpening blade, a sharpening blade fixing device and a sharpening frame, wherein a sharpening blade fixing groove is formed in the sharpening frame, the sharpening blade is detachably arranged in the sharpening blade fixing groove, and the sharpening blade fixing device is arranged at the top end of the sharpening blade fixing groove and is fastened and fixed with the top end of the sharpening blade.

The blade grinding device is characterized by also comprising a blade grinding support, wherein the blade grinding fixing groove is arranged on the blade grinding frame through the blade grinding support; the knife sharpening piece bracket, the knife sharpening piece and the knife sharpening piece fixing device are combined to form a knife sharpening piece assembly, and the knife sharpening piece assembly is arranged on the knife sharpening frame.

The knife sharpening sheet bracket is provided with a connecting shaft or a connecting hole in the bottom end direction of the knife sharpening sheet fixing groove; the knife sharpening sheet bracket is provided with a hook or a hanging hole at the periphery of the connecting shaft or the connecting hole.

The grinding tool rest is provided with a fixing hole or a fixing shaft corresponding to the connecting shaft or the connecting hole; two identical knife sharpening sheet assemblies are arranged on the knife sharpening frame; the sharpening sheet assembly is connected with the sharpening frame shaft through a connecting shaft or a connecting hole of the sharpening sheet bracket; the two sharpening sheet assemblies are arranged in tandem and in a crossed manner in an approximate X shape, and are axisymmetrical by taking a central shaft passing through the sharpening sheet assemblies in the vertical direction as an axis; the sharpening blades on the two sharpening blade assemblies are opposite to form a V-shaped sharpening edge.

The two knife sharpening assembly or the two knife sharpening assembly and the knife sharpening frame are connected by an elastic component; the connecting position is a hook or a hanging hole on the sharpening sheet bracket; the knife to be ground is pressed on the V-shaped grinding edge, and the angle of the V-shaped grinding edge can be changed along with the difference of the pressure.

The knife sharpening sheet fixing device comprises a nut or a screw and a pressing buckle; the pressing buckle is annular, and the ring is provided with a recess or a bulge matched with the two ends of the knife sharpening sheet.

The sharpening sheet bracket is provided with threads matched with the nut or the screw above the sharpening sheet fixing groove; the grinding blade is pressed by the pressing buckle after the nut or the screw is screwed down.

The left side and the right side of the knife sharpening frame are provided with armrest parts, and the armrest parts and the knife sharpening sheet assemblies are axially symmetrical through the same central shaft.

The side of the sharpening blade support is provided with an extending end, a limiting groove with an opening facing the extending end is arranged at the position, corresponding to the extending end, of the sharpening frame, the extending end extends into the limiting groove, and the side wall of the limiting groove can limit the swinging amplitude of the sharpening blade support.

The top of the sharpening frame is provided with a limiting groove with an opening facing the sharpening sheet support, the top end of the sharpening sheet support extends into the limiting groove, and the side wall of the limiting groove can limit the swing amplitude of the sharpening sheet support.

And a storage groove or a buckle for placing a standby sharpening blade is arranged at the bottom of the sharpening frame.

The cross section of the sharpening blade fixing groove is bilaterally symmetrical, the widths of the two sides are folded and narrowed at the top end of the opening along the opening direction, and the height of the top end of the opening is lower than that of the sharpening blade.

The utility model has the advantages that: the two ends of the sharpening blade are respectively provided with a bulge or a recess for fixing, four working surfaces in the length direction are respectively ground or polished, and four edges can be used for sharpening; the utilization rate of the sharpening blade is improved. The hand-screwed nut or screw is used for fixing the sharpening blade, so that the sharpening blade can be more conveniently assembled and disassembled; the two knife sharpening sheet assemblies and the armrests at the two sides are axially symmetrical by the same central shaft, so that the appearance and the structure of the front direction and the back direction of the knife sharpener are the same, the two sides of the knife sharpener can sharpen the knife, and the hand feeling of use is also the same. The three designs facilitate the rotary exchange of the front and the back, the inner side and the outer side, and the upper end and the lower end of the sharpening blade, and prolong the service life of the sharpening blade. The storage groove or the buckle at the bottom of the sharpening frame can be used for placing the spare sharpening blade, so that the usage is more convenient. The two sharpening blade supports can rotate around the axis of the connecting shaft or the connecting hole, and the lower ends of the sharpening blade supports are connected in a tensioned mode through the spring, so that the sharpening blades can be attached to the cutting edge all the time in the using process. The sharpness of the grinded edge can be adjusted by controlling the inclination angle and the pressure of the knife. The sharpening blade is always attached to the blade edge, so that the blade edge can be smooth.

Description of the drawings:

the invention will be further explained with reference to the drawings and examples,

fig. 1 is a schematic diagram of embodiment 1 of the present invention;

FIG. 2 is a schematic bottom structure of embodiment 1 of FIG. 1;

FIG. 3 is a schematic top view of embodiment 1 of FIG. 1;

FIG. 4 is a partial structural sectional view of embodiment 1 of FIG. 1;

FIG. 5 is an exploded view of the sharpening blade assembly of embodiment 1 of FIG. 1;

FIG. 6 is a front schematic view of the knife blade assembly of embodiment 1 of FIG. 1;

FIG. 7 is a cross-sectional view of A1-A1 of FIG. 6;

fig. 8 is a schematic view of embodiment 2 of the present invention;

fig. 9 is a bottom schematic view of fig. 8 of the present invention;

fig. 10 is a schematic top view of fig. 8 of the present invention;

fig. 11 is a partial cross-sectional view of the structure of fig. 8 of the present invention;

fig. 12 is an exploded view of the knife blade assembly of fig. 8 in accordance with the present invention;

FIG. 13 is a schematic view of the protruding structure at the two ends of the long end of the sharpening blade of the present invention;

FIG. 14 is a schematic view of the concave structure at the two ends of the long end of the knife sharpening sheet of the present invention;

in the figure:

1. the sharpening device comprises a sharpening frame, 2 parts of a sharpening sheet assembly, 3 parts of a positioning shaft, 4 parts of foot pads, 5 parts of a storage groove cover, 6 parts of a spring, 11 parts of an armrest part, 12 parts of a base, 13 parts of a storage groove, 111 parts of a limiting groove, 121 parts of a sharpening sheet fastener, 21 parts of a nut, 22 parts of a pressing fastener, 23 parts of a sharpening sheet bracket, 24 parts of a sharpening sheet, 231 parts of a connecting hole and 232 parts of a connecting shaft.

The specific implementation mode is as follows:

two embodiments of the present invention will be described below with reference to the accompanying drawings. It is to be understood that the embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present invention.

Wherein like reference numerals refer to like parts or structures throughout.

In addition, if a detailed description of the known art is not necessary for the features of the present invention, it is omitted. The words "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", and the like used in this patent description indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, which are in the directions of the drawings. The words "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in fig. 13, the sharpening sheet 24 is a rectangular strip shape as a whole, is axisymmetric about a center line in the direction of the major axis (a-a ') and the direction of the broad axis (b-b'), and has a rectangular cross section (plane o) perpendicular to the longitudinal direction, and projections for fixing are provided at both ends of the sharpening sheet 24 in the longitudinal direction.

As shown in fig. 14, the blade 24 is formed in a rectangular shape as a whole, is axisymmetric about a center line in the direction of the major axis (a-a ') and the direction of the major axis (b-b '), and has a rectangular cross section (o ' plane) perpendicular to the longitudinal direction, and the blade 24 of this embodiment is designed with recesses for fixing at both ends in the longitudinal direction.

The four planes on which the four long sides of the sharpening blade 24 are located as shown in both fig. 13 and 14 are ground or polished to make the four edges smooth and sharp. The four edges in the length direction of the sharpening blade can be replaced and used mutually, after the edge on one side is abraded, the sharpening blade can continue to be used in the rotating direction, and the edge on the other side or the edge on the other side is sharpened, so that the service efficiency of the sharpening blade is improved, and the material is saved.

As shown in fig. 1 and 2, in embodiment 1, the knife sharpener with detachable sharpening blades in this embodiment includes: the grinding tool comprises a grinding tool rest 1, a grinding tool blade assembly 2, a positioning shaft 3, a foot pad 4, a storage groove cover 5 and a spring 6. The sharpener rack 1 comprises a handrail part 11 in the vertical direction and a base 12 in the horizontal direction, and a limiting groove 111 is designed at the position, close to the sharpener blade assembly 2, of the upper end of the handrail part 11. The side edge of the sharpening blade bracket 23 is provided with an extending end, the sharpening frame 1 is provided with a limiting groove 111 with an opening facing the extending end at a position corresponding to the extending end, and the extending end extends into the limiting groove 111.

As shown in fig. 5, the sharpening blade assembly 2 comprises: the device comprises a nut 21, a pressing buckle 22, a sharpening sheet bracket 23 and a sharpening sheet 24. Wherein, the nut 21 and the pressing buckle 22 constitute a knife sharpening sheet fixing device. The screw hole of the nut 21 is a counter bore. The sharpening sheet bracket 23 is provided with a sharpening sheet fixing groove for placing the sharpening sheet 24, the upper end direction of the sharpening sheet fixing groove is provided with a thread matched with the nut 21, the lower end direction of the sharpening sheet fixing groove is provided with a connecting hole 231, and the lower part of the outer ring of the connecting hole 231 is provided with a hook. The whole square strip-shaped form that is of whetting a knife 24, square strip-shaped form be the cuboid shape promptly, respectively have an arc sunken at the edge at length direction both ends. The pressing buckle 22 is in a ring shape, and an arc-shaped bulge matched with the knife sharpening sheet 24 is designed in the ring.

As shown in fig. 4, the sharpening blade 24 is placed in the sharpening blade fixing groove, and after the nut 21 is tightened, the pressing buckle 22 presses the sharpening blade 24 to fix the sharpening blade 24 in the sharpening blade fixing groove of the sharpening blade holder 23. The pressing buckle 22 is sleeved on the knife sharpening sheet support, and the arc-shaped bulge inside is embedded into the depression at the upper end of the knife sharpening sheet 24, so that the knife sharpening sheet 24 can be prevented from falling off from the knife sharpening sheet fixing groove.

The nut 21 is a hand-screwed nut with strip-shaped anti-slip lines on the outer surface. Alternatively, a hand-screwed screw with anti-slip threads on the periphery of the screw head can be used to replace the nut, the external threads on the sharpening sheet support are changed into internal threads, and the sharpening sheet is fixed by pushing and pressing the button through the screw post.

As shown in fig. 7, the cross section of the sharpening blade 24 is rectangular, the sharpening blade fixing slot of the sharpening blade support 23 is a square opening slot, and under the condition that the opening is upward, the cross section of the sharpening blade fixing slot is bilaterally symmetrical, and the shape width of the two sides of the cross section is converged and narrowed at the top end of the opening along the opening direction. The height of the top end of the opening of the sharpening blade fixing groove is lower than that of the sharpening blade, so that the blade edge can be prevented from rubbing the sharpening blade support.

As shown in fig. 4, the positioning shaft 3 passes through the connecting hole 231 on the sharpening sheet bracket 23 to assemble the two sharpening sheet assemblies 2 in tandem and in an X-shape in a crossed manner on the sharpening frame 1. The inner side surfaces of the two sharpening blades 24 form a V-shaped sharpening edge. The two ends of the spring 6 hook the hooks at the lower end of the sharpening sheet bracket 23 respectively and are tensioned all the time. The two sharpening blade assemblies 2 can rotate around the axis of the connecting hole 231. The extending end of the side edge of the sharpening sheet bracket 23 extends into the limiting groove 111 of the sharpening frame 1, and when the sharpening sheet assembly 2 swings back and forth and left and right, the side wall of the limiting groove 111 plays a role in limiting and supporting; the rotation range of the knife sharpening sheet component 2 can be limited, and the size of the included angle of the V-shaped knife sharpening opening can be limited. When the knife is pressed down, the sharpening sheet 24 will cling to the blade and rotate around the axis of the connecting hole 231, and the size of the included angle of the V-shaped sharpening opening will change with the size of the pressure. Therefore, the user can adjust the sharpness of the sharpened edge by controlling the inclination angle and the pressure of the knife.

The hooks at the lower end of the sharpening blade bracket 23 are directly connected with the sharpening frame 1 by springs respectively, so that the same functional effect can be realized. The elastic parts are symmetrically connected, so that when the cutter is pressed on the V-shaped grinding edge, the pressure is different, and the angle of the V-shaped grinding edge is variable.

As shown in fig. 2, the bottom of the sharpening block is provided with a foot pad 4 and a storage tank 13. The storage tank 13 is provided with a spare sharpening sheet 24. The storage groove cover 5 covers the storage groove 13 and can be rotated to be opened so as to cover the spare sharpening sheet 24. When the knife sharpening sheet of the knife sharpener can not be used, the spare knife sharpening sheet can be used.

In embodiment 2 shown in fig. 8, a detachable sharpening blade sharpener comprises: knife rest 1, knife blade subassembly 2, callus on the sole 4, spring 6. The sharpening frame 1 comprises a handrail part 11 in the vertical direction and a base 12 in the horizontal direction, and the left upper corner and the right upper corner of the handrail part 11 are respectively provided with a hand holding area for holding.

As shown in fig. 12, the sharpening blade assembly 2 comprises: the device comprises a nut 21, a pressing buckle 22, a sharpening sheet bracket 23 and a sharpening sheet 24. Wherein, the nut 21 and the pressing buckle 22 constitute a knife sharpening sheet fixing device. The screw hole of the nut 21 is a through hole, and the strip-shaped anti-skid lines on the surface can be conveniently and manually disassembled and assembled. The middle part of the sharpening blade bracket 23 is designed with a sharpening blade fixing groove, the lower part is provided with a connecting shaft 232 and a hanging hole for the hook spring 6, and the upper part is designed with a thread matched with the nut 21. The sharpening blade 24 is in the shape of a long strip, the cross section perpendicular to the length direction is rectangular, and trapezoidal protrusions are arranged at two ends in the length direction. The pressing buckle 22 is in a ring shape, and a recess matched with the two ends of the sharpening sheet 24 is designed in the ring. After assembly, as shown in fig. 11, the sharpening sheet 24 is inserted into the sharpening sheet fixing groove of the sharpening sheet holder 23, and the trapezoidal protrusion at the upper end extends into the recess of the pressing buckle 22. After the nut 21 is tightened, the sharpening sheet 24 is pressed by the pressing buckle 22 and fixed with the sharpening sheet bracket 23.

As shown in fig. 11, two blade sharpening assemblies 2, in tandem, are assembled on the blade sharpening holder 1 in a crossed manner in an approximate "X" shape by means of their own connecting shafts 232. The two ends of the spring 6 hook the hanging holes at the lower end of the sharpening piece bracket 23 respectively and are tensioned all the time. The two sharpening blade assemblies 2 can rotate around the axis of the connecting shaft 232. The top of the sharpening frame 1 is provided with a limiting groove 111 with an opening facing the sharpening blade support 23, the top end of the sharpening blade support 23 extends into the limiting groove 111 of the sharpening frame 1, and the front side wall, the rear side wall, the left side wall and the right side wall of the limiting groove 111 are used for limiting the swinging of the sharpening blade assembly 2.

As shown in fig. 9, the bottom of the sharpening holder 1 is designed with a buckle 121 for placing and fixing a spare sharpening sheet 24.

In both embodiments, as shown in fig. 1 and 8, the center lines X-X 'and Y-Y' are the projections of the center lines in the left-right and front-back directions between the two sharpening sheet assemblies 2 in the horizontal direction on the bottom. The axis Z-Z' is the vertical central axis passing through the intersection of these two centerlines. As shown in fig. 3 and 10, the two sharpening blade assemblies 2 and the armrests 11 on both sides are axisymmetrical with the central axis Z-Z'. Therefore, the relative positions of the sharpening blade and the armrest part can be ensured, the front and the back surfaces are kept the same, and the hand feeling is not different during sharpening.

By combining the above embodiments, another sharpener with detachable sharpening blade can be obtained, which comprises a sharpening blade, a sharpening blade fixing device and a sharpening frame. The novel sharpening device is characterized in that a V-shaped notch is formed in the sharpening frame, sharpening piece fixing grooves with opposite openings are formed in two sides of the V-shaped notch, threads used for screwing screws or nuts are arranged at the top end of the sharpening piece fixing grooves, sharpening pieces are detachably arranged in the sharpening piece fixing grooves, and the sharpening piece fixing device is arranged at the top end of the sharpening piece fixing grooves and is buckled with the top ends of the sharpening pieces. The solution thus obtained is also a knife sharpener with removable sharpening blades.

Or another scheme can be obtained, the knife sharpening frame further comprises a knife sharpening support, and the knife sharpening fixing groove is arranged on the knife sharpening frame through the knife sharpening support; the knife sharpening piece bracket, the knife sharpening piece and the knife sharpening piece fixing device are combined to form a knife sharpening piece assembly, and the knife sharpening piece assembly is arranged on the knife sharpening frame.

Furthermore, the sharpening sheet bracket is provided with a connecting shaft or a connecting hole in the bottom end direction of the sharpening sheet fixing groove; the knife sharpening sheet bracket is provided with a hook or a hanging hole at the periphery of the connecting shaft or the connecting hole.

Further, a fixing hole or a fixing shaft corresponding to the connecting shaft or the connecting hole is arranged on the knife grinding frame; two identical knife sharpening sheet assemblies are arranged on the knife sharpening frame; the sharpening sheet assembly is connected with the sharpening frame shaft through a connecting shaft or a connecting hole of the sharpening sheet bracket; the two sharpening sheet assemblies are arranged in tandem and in a crossed manner in an approximate X shape, and are axisymmetrical by taking a central shaft passing through the sharpening sheet assemblies in the vertical direction as an axis; the sharpening blades on the sharpening blade assemblies are opposite to each other to form a V-shaped sharpening edge.

Furthermore, the two knife sharpening assembly or the two knife sharpening assembly and the knife sharpening frame are connected through an elastic component; the connecting position is a hook or a hanging hole on the sharpening sheet bracket; the knife to be ground is pressed on the V-shaped grinding edge, and the angle of the V-shaped grinding edge can be changed along with the difference of the pressure.

The elastic member may be a spring, a leaf spring, an elastic cord, or the like. The fixing device can also be other schemes for equivalent fixing, and is in the protection range of the local. The sharpening sheet can also be in a strip shape with four long edges equal in length, or in a central shaft symmetrical structure in the long edge direction, and the bulges or the depressions at the two ends in the length direction are matched with the structure of the fixing device for fixing the sharpening sheet.

The embodiments of the present invention have been described above with reference to the accompanying drawings. It is to be noted in particular that: the blade sharpening assembly is referred to as a whole as the included components in the description, and is only for the convenience of describing the structure of the present invention, and does not refer to or imply the assembly sequence or necessary reference of the present invention. The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and modifications can be made therein, and equivalents may be substituted for elements thereof. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention are all included in the protection scope of the present invention.

Claims

1. The utility model provides a blade of whetting a knife, characterized by: the whole sharpening blade is in a strip shape with four long sides being equal in length, the cross section perpendicular to the length direction is rectangular, and bulges or depressions for fixing are designed at two ends in the length direction; four planes where four long sides of the grinding blade are located are ground or polished, so that four edges are smooth and sharp.

2. A sharpener for using the sharpening blade of claim 1, comprising: the sharpening device comprises a sharpening blade, a sharpening blade fixing device and a sharpening frame, wherein a sharpening blade fixing groove is formed in the sharpening frame, the sharpening blade is detachably arranged in the sharpening blade fixing groove, and the sharpening blade fixing device is arranged at the top end of the sharpening blade fixing groove and is fastened and fixed with the top end of the sharpening blade.

3. The sharpener of claim 2, wherein: the blade grinding device is characterized by also comprising a blade grinding support, wherein the blade grinding fixing groove is arranged on the blade grinding frame through the blade grinding support; the knife sharpening piece bracket, the knife sharpening piece and the knife sharpening piece fixing device are combined to form a knife sharpening piece assembly, and the knife sharpening piece assembly is arranged on the knife sharpening frame.

4. The sharpener of claim 3, wherein: the knife sharpening sheet bracket is provided with a connecting shaft or a connecting hole in the bottom end direction of the knife sharpening sheet fixing groove; the knife sharpening sheet bracket is provided with a hook or a hanging hole at the periphery of the connecting shaft or the connecting hole.

5. The sharpener of claim 4, wherein: the grinding tool rest is provided with a fixing hole or a fixing shaft corresponding to the connecting shaft or the connecting hole; two identical knife sharpening sheet assemblies are arranged on the knife sharpening frame; the sharpening sheet assembly is connected with the sharpening frame shaft through a connecting shaft or a connecting hole of the sharpening sheet bracket; the two sharpening sheet assemblies are arranged in tandem and in a crossed manner in an approximate X shape, and are axisymmetrical by taking a central shaft passing through the sharpening sheet assemblies in the vertical direction as an axis center; the sharpening blades on the sharpening blade assemblies are opposite to each other to form a V-shaped sharpening edge.

6. The sharpener of claim 5, wherein: the two knife sharpening assembly or the two knife sharpening assembly and the knife sharpening frame are connected through an elastic component; the connecting position is a hook or a hanging hole on the sharpening sheet bracket; the knife to be ground is pressed on the V-shaped grinding edge, and the angle of the V-shaped grinding edge can be changed along with the difference of the pressure.

7. The sharpener of claim 6, wherein: the knife sharpening sheet fixing device comprises a nut or a screw and a pressing buckle; the pressing buckle is annular, and the ring is provided with a recess or a bulge matched with the two ends of the knife sharpening sheet.

8. The sharpener of claim 7, wherein: the sharpening sheet bracket is provided with threads matched with the nut or the screw above the sharpening sheet fixing groove; the grinding blade is pressed by the pressing buckle after the nut or the screw is screwed down.

9. The sharpener of claim 8, wherein: the left side and the right side of the knife sharpening frame are provided with armrest parts, and the armrest parts and the knife sharpening sheet assemblies are axially symmetrical through the same central shaft.

10. The sharpener of claim 9, wherein: the side of the sharpening blade support is provided with an extending end, a limiting groove with an opening facing the extending end is arranged at the position, corresponding to the extending end, of the sharpening frame, the extending end extends into the limiting groove, and the side wall of the limiting groove can limit the swinging amplitude of the sharpening blade support.

11. The sharpener of claim 9, wherein: the top of the sharpening frame is provided with a limiting groove with an opening facing the sharpening sheet support, the top end of the sharpening sheet support extends into the limiting groove, and the side wall of the limiting groove can limit the swing amplitude of the sharpening sheet support.

12. The sharpener of any one of claims 2-11 wherein: and a storage groove or a buckle for placing a standby sharpening blade is arranged at the bottom of the sharpening frame.

13. The sharpener of any one of claims 2-11 wherein: the cross section of the sharpening blade fixing groove is bilaterally symmetrical, the widths of the two sides are folded and narrowed at the top end of the opening along the opening direction, and the height of the top end of the opening is lower than that of the sharpening blade.