CN111571322A

CN111571322A - Knife sharpener

Info

Publication number: CN111571322A
Application number: CN202010555179.2A
Authority: CN
Inventors: 陈玉杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2020-08-25
Also published as: CN113478304A; CN214418338U

Abstract

The invention provides a knife sharpener, which comprises a knife fixing device, a grinding tool assembly and a fixing frame; the cutter fixing device is used for positioning a cutter to be ground; the grinding tool assembly is used for grinding the blade part of the cutter to be ground; still include in the grinding apparatus subassembly with grind the first angle adjusting device that the piece links to each other for adjust the angle of grinding the piece, carry out the grinding of different angles to the cutting edge position of cutter with doing benefit to grinding the piece, and/or, cutter fixing device has second angle adjusting device for adjust the angle of treating the grinding tool, carry out the grinding of different angles with the cutting edge position of treating the grinding tool with doing benefit to grinding the piece, the mount is connected with the grinding apparatus subassembly, perhaps, be equipped with first guide rail on the mount and be connected with the grinding apparatus subassembly. The knife sharpener is high in working efficiency and good in grinding effect, can be used for common families, and is also suitable for restaurants, catering enterprises and food processing factories which require knife sharpening machines.

Description

Knife sharpener

Technical Field

The invention relates to the technical field of cutter processing, in particular to a knife sharpener.

Background

The knife, especially the kitchen knife, is the indispensable instrument in resident's daily life, and the passivation phenomenon can appear in the cutter use, also is known as "not sharp", so need regularly grind the restoration to the cutting edge of cutter to guarantee its sharpness. Taking a kitchen knife as an example, the knife sharpeners in the prior art are generally classified into the following two types:

one common sharpener includes two sharpening wheels. Each knife sharpening wheel is provided with a knife sharpening surface, the two knife sharpening surfaces are arranged oppositely, and a V-shaped groove is formed between the two knife sharpening wheels. When the cutter is ground, the cutting edge of the cutter to be ground is placed in the V-shaped groove, and the driving device is used for driving the two cutter grinding wheels to rotate so as to grind the cutting edge. In this way, the space of the V-shaped groove between the two sharpening wheels changes along with the wear of the sharpening wheels, and particularly, the included angle of the tip end of the V-shaped groove is likely to be increased, so that the sharpness of the ground cutter is reduced.

Another common knife sharpener includes a knife stone, the knife stone contacts with the blade of the tool to be sharpened, and a driving device can be used to drive the knife stone or the tool to be sharpened to reciprocate along the sharpening direction, thereby completing sharpening of the blade. This kind of mode of whetting a knife, not only efficiency is not high, and relative friction takes place for certain fixed region of cutting edge and whetstone moreover, and along with going on of grinding, the whetstone can take place the loss, and the whetstone can present the height unevenness with the one side of cutter contact, can produce very big influence to the quality of whetting a knife when using this whetstone to carry out follow-up grinding like this

Disclosure of Invention

The invention mainly solves the technical problem of providing a knife sharpener with simple structure and good grinding effect.

According to a first aspect, a tool holder, a grinder assembly and a holder;

the cutter fixing device is used for positioning a cutter to be ground;

the grinding tool assembly is used for grinding the blade part of the cutter to be ground;

the grinding tool assembly comprises a driving device and a grinding piece;

the grinding device comprises a grinding piece, a driving device and a grinding tool, wherein the driving device is used for driving the grinding piece to work, a grinding surface on the grinding piece is in contact with a blade part of the tool to be ground when the grinding piece is in a working state, and the blade part of the tool to be ground generates a blade grinding function through rotary friction motion under the driving of the driving device;

the grinding tool assembly also comprises a first angle adjusting device which is used for adjusting the angle of the grinding piece so as to be beneficial to the grinding piece to grind the blade part of the tool at different angles; and/or the cutter fixing device is provided with a second angle adjusting device for adjusting the angle of the blade part of the cutter to be ground so as to be beneficial to grinding the blade part of the cutter to be ground by the grinding piece at different angles;

the fixed frame is connected with the grinding tool assembly and used for fixing the grinding tool assembly, so that the grinding part in the working state is in contact with the cutting edge of the tool to be ground and performs rotary friction motion, or the fixed frame is provided with a first guide rail, and the grinding tool assembly is movably arranged on the first guide rail, so that the grinding part on the grinding tool assembly in the working state performs rotary friction motion with the cutting edge of the tool to be ground in a movable mode along the track of the first guide rail.

According to the knife sharpener of the above embodiment, the function of grinding the knife is generated by the rotational friction motion between the grinding surface and the blade portion. And in the process of grinding, the force application end of the abutting force application device can press the grinding surface on the blade part contacted with the force application end. Further, this sharpener is through having set up first angle adjusting device and second angle adjusting device with the angle of adjusting the grinding piece for the gradient of grinding the face matches with the gradient at cutting edge position. The butt force application device and the first angle adjusting device work in a coordinated mode, so that the grinding surface is in tight contact with the cutting edge, the stress of the contact parts is uniform, the knife sharpening mode is high in efficiency, and the knife is sharper in grinding.

Drawings

FIG. 1 is a schematic view of an embodiment of a sharpener;

FIG. 2 is a schematic view of another perspective of an embodiment of a sharpener;

FIG. 3 is a top view of an embodiment of a sharpener;

FIG. 4 is an enlarged partial view of an embodiment of the abrasive surface in contact with the blade portion;

FIG. 5 is an enlarged, fragmentary view of an abrasive surface of one embodiment in operation;

FIG. 6 is a schematic longitudinal cross-sectional view of a tool holding device according to an embodiment;

FIG. 7 is a schematic structural view illustrating an angle-adjustable state of the tool holder according to an embodiment;

FIG. 8 is a schematic structural view illustrating a state in which the height of the tool fixing device is adjusted according to an embodiment;

FIG. 9 is a schematic view of the structure of the guide rail in the guide assembly according to one embodiment;

FIG. 10 is a schematic view of an embodiment of a sharpener (with a tool holder omitted and a sharpener assembly partially disposed).

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present invention have not been shown or described in the specification in order to avoid obscuring the present invention from the excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they can be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" as used herein includes both direct and indirect connections (couplings), unless otherwise specified.

The key concept of the invention is to grind the cutter by utilizing the rotation friction between the grinding surface and the blade part, and the first abutting force application device and the second abutting force application device are arranged to ensure the close contact between the grinding surface and the blade part, and the first angle adjustment device and the second angle adjustment device are also arranged to ensure that the inclination of the grinding surface is matched with the inclination of the blade part.

Referring to fig. 1-3, the present embodiment provides a knife sharpener, which includes a tool fixing device 100, a sharpener assembly 200 and a holder 300.

The tool holder 100 is used to position the tool 10 to be ground. In this embodiment, the top of the tool fixing device 100 is used for placing the tool 10 to be ground, and the top of the tool fixing device 100 is a supporting surface 110a, and various tool clamps 110b meeting the requirements of the present invention may be disposed on the supporting surface 110a to fix the tool 10 to be ground, or the adsorption electromagnet 110c is used to adsorb the tool 10 to be ground. The edge of the tool 10 to be ground may be upward, or may be placed horizontally, or may be placed at a certain angle with the horizontal.

The grinder assembly 200 includes a grinding assembly 210, a first abutment forcing means 220 and a first angle adjusting means 230.

The grinding assembly 210 includes a drive device 211 and a grinding member 212.

The driving device 211 is provided with a rotating shaft 211a connected with the grinding member 212, the driving device 211 is used for driving the grinding member 212 to work, when the grinding member 212 is in a working state, the grinding surface 212a on the grinding member 212 is in contact with the blade part 11 of the tool 10 to be ground, and the blade part 11 of the tool 10 to be ground generates a function of grinding by rotating and rubbing under the driving of the driving device 211.

As shown in fig. 1, the grinding member 212 is a cylindrical grinding whetstone, one end surface of which is a grinding surface 212a, a protruding turning handle is fixed at the axis of the end surface of the other end of the grinding whetstone, the driving device 211 is a rotating motor, the rotating shaft 211a of the rotating motor is coaxially butted with the turning handle of the grinding member 212, and the grinding surface 212a on the grinding member 212 can be pressed against the blade portion 11 of the tool 10 to be ground or away from the blade portion 11 of the tool 10 to be ground by moving the grinding member 212 and/or the grinding tool assembly 200. When the grinding surface 212a is pressed against the blade 11 of the tool 10 to be ground, the rotating motor is energized, the grinding member 212 is in a working state, the grinding surface 212a rotates around the central axis perpendicular to the grinding surface 212a, so that the blade 11 of the tool 10 to be ground is ground, any part of the grinding surface 212a is in contact with the blade, and the grinding of the tool 10 to be ground can be completed. Preferably, half of the whole grinding surface 212a or the whole grinding surface 212a is in contact with the blade portion 11, so that the whole grinding surface 212a is ensured to have a rotational friction motion with the blade portion 11 during grinding, and the whole surface of the grinding surface 212a is uniformly worn without unevenness, thereby being beneficial to grinding the tool 10 to be ground to be sharper.

In various embodiments, by varying the contact surface of the abrading article 212 with the edge portion of the tool 10 to be sharpened, other working surfaces of the abrading article 212 (e.g., the lateral side surfaces of the abrading article 212) may be abraded with the edge portion of the tool 10 to be sharpened.

The force applying end of the first abutting force applying device 220 is coupled to the grinding member 212, and the grinding surface 212a of the grinding member 212 is pressed against the blade portion of the tool to be ground 10 or away from the blade portion 11 of the tool to be ground 10 by moving the adjusting grinder assembly 200. As shown in fig. 1, the first abutment biasing device 220 of the present embodiment includes an elastic member 221 and a fixing frame 222, the fixing frame 222 is a hollow structure having a heat dissipation vent at an outer periphery thereof and an opening for accommodating the driving device 211, the fixing frame 222 is provided with a guide groove 222a at the opening, and a rotation shaft 211a of the driving device 211 is coaxial with the guide groove 222 a. One end of the elastic member 221 (e.g., a spring) abuts against the driving device 211, the other end of the elastic member 221 abuts against a surface of the fixing frame 222 opposite to the driving device 211, and the end of the elastic member 221 connected to the driving device 211 can be used as the force applying end of the first abutting force applying device 220 in this embodiment. When the grinding surface 212a of the grinding member 212 is pressed against the blade portion 11 of the tool 10 to be ground, the grinding member 212 applies pressure to the elastic member 221, so that the elastic member 221 is elastically deformed, and the elastic member 221 generates an external elastic force, so that the grinding surface 212a is pressed against the blade portion 11.

As shown in fig. 4 and 5, the working principle of the first abutting force application device 220 is further illustrated, in fig. 4, the grinding surface 212a is at a position just contacting the blade portion 11, and at this time, the elastic member 221 is not in a compressed state, in fig. 5, the grinding member 212 continues to move toward the tool 10 to be ground, i.e., moves toward the arrow in the left direction in the figure, and at this time, the blade portion 11 applies a rightward force to the grinding surface 212a, and the force is applied to the elastic member 221 through the grinding member 212 and the driving device 211, so that the elastic member 221 is compressed, and the compressed elastic member 221 generates an elastic force and then is applied to the blade portion 11 through the driving device 211 and the grinding surface 212 a.

Through the first abutting force application device 220, the contact between the grinding surface 212a and the blade part 11 can be ensured to be tighter in the grinding process, so that the grinding surface of the grinding piece 212 and/or the blade surface of the tool 10 to be ground are always in tight contact with the blade surface of the tool to be ground when the grinding surface and the blade surface are worn.

The angles that different cutter cutting edge positions need to be ground are different, and in order to enable different cutter cutting edges to become sharper, the angle of the grinding surface needs to be adjusted to match the cutting edge positions of different cutters. In this embodiment, the first angle adjusting device 230 is connected to the grinding member 212, and is used for adjusting the angle of the grinding member 212, so that the inclination of the grinding surface 212a is matched with the inclination of the blade portion 11 during grinding. As shown in fig. 1, a universal adjusting member may be used as the first angle adjusting device 230, the universal adjusting member includes a clamping member 231, a ball rod 232 and an adjusting locking member 233, the ball head of the ball rod 232 is rotatably mounted in the clamping member 231, the rod part of the ball rod 232 is connected to the fixing frame 222, the rotation of the fixing frame 222 drives the grinding member 212 to perform angle adjustment, and when the angle is adjusted to a proper angle, the ball head of the ball rod 232 can be locked by the adjusting locking member 233 so as to be unable to rotate.

The fixing frame 300 provides support for the first abutment forcing device 220 and the first angle adjusting device 230. For example, as shown in fig. 1-2, the fixing frame 300 includes a first fixing member 310 and a second fixing member 320, the first fixing member 310 is used to provide support for the driving device 211 and the first angle adjusting device 230, in this embodiment, the fixing frame 222 is connected to the first fixing member 310 through a universal adjusting member, and if the first abutting force applying device 220 and the first angle adjusting device 230 of other structures are adopted, it is also possible to realize that the first angle adjusting device 230 is connected to the first fixing member 310 through the first abutting force applying device 220.

In this embodiment, the first fixing member 310 and the second fixing member 320 are rod-shaped members, respectively, and two ends of the first fixing member 310 are connected to the top of the second fixing member 320, so that the first fixing member 310 and the second fixing member 320 form a connecting structure. Further, the second fixing member 320 is a hollow structure, the top of the second fixing member 320 is provided with an opening, a positioning column 251 is arranged below the end portion of the first fixing member 310, the positioning column 251 can extend into the corresponding second fixing member 320, and the distance between the first fixing member 310 and the second fixing member 320 can be adjusted by adjusting the length of the positioning column 251 extending into the second fixing member 320. The side wall of the second fixing member 320 is also provided with a threaded hole, and the threaded hole is close to the top of the second fixing member 320. After the distance between the first fixing member 310 and the second fixing member 320 is suitable, a pressing member 252 (e.g., a screw) may be used to press the positioning post 251 through the screw, so as to complete the fixing of the relative position between the first fixing member 310 and the second fixing member 320, where the pressing member 252 and the positioning post 251 constitute an embodiment of the telescopic assembly. By adjusting the distance between the first and second fixing

members

310 and 320, the height of the grinding member 212 can be raised or lowered.

In some embodiments, the tool fixing device 100 may be designed such that the tool fixing device 100 also has both angle adjustment and abutting force application functions, for example, as shown in fig. 6, the tool fixing device 100 includes a fixing plate 110, a base plate 120, and a second angle adjustment device, the fixing plate 110 is used for placing a tool holder 110b or attracting an electromagnet 110c, and the second angle adjustment device includes a guide post 130, a locking member 140, and a support spring 150.

Specifically, the fixing plate 110 is provided with four through holes penetrating through the fixing plate 110, the four through holes are respectively close to four corners of the fixing plate 110, the lower surface of the fixing plate 110 is provided with four counter bores coaxial with the through holes of the fixing plate 110 and having a diameter larger than that of the through holes, and the upper surface of the base plate 120 is provided with four guide posts 130 coaxial with the through holes of the fixing plate 110. One end of the guiding post 130 passes through the through hole of the fixing plate 110 and extends above the fixing plate 110, the guiding post 130 has an external thread, and the radius of the through hole of the fixing plate 110 is slightly larger than the radius of the guiding post 130, and the part of the guiding post 130 extending above the fixing plate 110 is connected with a nut, for example, a screw rod can be used as the guiding post 130, and the nut is used as the locking member 140.

One end of the supporting spring 150 abuts against the upper surface of the base plate 120, the other end of the supporting spring 150 abuts against a counter bore of the lower surface of the fixing plate 110, and the fixing plate 110 is pressed between the locking member 140 and the supporting spring 150 under the elastic force of the supporting spring 150, for example, a spring may be used as the supporting spring 150, and the supporting spring 150 supports the fixing plate 110.

As shown in fig. 2-3, the knife 10 to be sharpened is laid on the fixed plate 110, the grinding member 212 is close to and contacts the blade portion 11 from top to bottom, a downward force is applied to the knife 10 to be sharpened, the fixed plate 110 supporting the knife 10 to be sharpened is also subjected to a downward force, so that the supporting spring 150 is compressed, and the compressed supporting spring 150 in turn applies an upward force to the fixed plate 110, thereby allowing the blade portion 11 to be in closer contact with the grinding surface 212 a.

In this embodiment, the angle between the blade portion 11 and the abrasive surface 212a can be adjusted by adjusting the height positions of the 4 locking members 140 on the guide posts 130 to incline the fixing plate 110. For example, if the distance between the 2 locking members 140 on the same side and the bottom plate 120 is shortened by rotating the 2 locking members 140 on the same side, the height of the fixing plate 110 on which the locking members 140 on the same side are located is also lowered, so that the portion of the fixing plate 110 is inclined downward and undergoes an angular change, by which the angle of the tool 10 to be ground can be adjusted. For example, as shown in fig. 7, the distance between the two locking members 140 on the right side of the fixing plate 110 and the base plate 120 becomes smaller, and the right side portion of the fixing plate 110 may be inclined downward because the radius of the through-hole on the fixing plate 110 is slightly larger than that of the guide post 130.

In different embodiments, nuts 160 are disposed at positions, close to the bottom plate 120, of 4 guide posts 130 of the tool fixing device 100, a spring positioning ring 170 is disposed on an upper surface of the nut 160, a lower end of the spring 150 is mounted in the spring positioning ring 170, an upper end of the spring 150 is mounted in a lower surface counterbore of the fixing plate 110, the spring 150 is pressed upward against the fixing plate 110 under the action of the locking member 140, as shown in fig. 8, the distances between the nuts 160 on the 4 guide posts 130 and the locking member 140 and the bottom plate 120 are adjusted, and the tool fixing device 100 can not only adjust the distance between the cutting edge and the grinding surface up and down, but also adjust the engagement angle between the cutting edge of the tool to be ground and the grinding surface more precisely.

In some embodiments, the tool holder 100 may further include a second abutment forcing device for forcing the blade portion 11 of the tool 10 to be ground to apply an elastic force in a direction corresponding to the ground surface 212a of the grinding member 212, under the action of the elastic force, the blade portion 11 of the tool holder 100 is in close contact with the ground surface 212a of the grinding member 212. For example, the spring 150 in the second angle adjustment device can be used as an elastic member in the second abutting force application device, the elastic member can generate an elastic force applied by the force application end to the direction corresponding to the blade portion 11 of the tool 10 to be ground, and the elastic member can be elastically deformed under the action of a reaction force applied to the force application end when the grinding surface 212a of the grinding member 212 abuts against the blade portion 11 of the tool 10 to be ground, so that the grinding surface 212a in the grinding process is in close contact with the blade portion 11.

In the tool fixing apparatus 100 having the above-described configuration, the second angle adjusting means and the first abutment biasing means 220 may be used together, or may be designed to have only one of the configurations.

In different embodiments, the tool fixing device 100 may not have an angle adjusting function and/or an abutting force applying function, and the tool fixing device 100 may be a simple fixing frame, and may also work normally depending on the angle adjusting function and the abutting force applying function of the grinder assembly 200.

In some embodiments, the grinding member 212 may also be configured to generate a moving rotational friction motion at the edge portion 11 of the tool 10 to be ground to generate a grinding function. For example, the knife sharpener further comprises a guiding assembly, a power output end of the guiding assembly is coupled to the grinding member 212, and the grinding member 212 can reciprocate along a preset grinding direction under the action of the guiding assembly, wherein the preset grinding direction is determined according to actual requirements, for example, a user can grind the tool to be ground 10 along the front and back of the face of the user, and can grind the tool to be ground 10 along the left and right of the face of the user. As shown in fig. 1 to 3, the guiding assembly includes a first motor 420a and a first guiding rail 410a, the first guiding rail 410a extends along a predetermined grinding direction and is disposed on the first fixing member 310, and the first angle adjusting device 230 is movably installed in the guiding rail of the first guiding rail 410a, so that the grinding member 212 movably rotates and rubs at the blade portion 11 of the tool 10 to be ground in the working state.

The first angle adjustment device 230 can be driven by the first motor 420a to reciprocate in the first guide rail 410a, so that the grinding member 212 can be moved in a predetermined grinding direction, and a movable rotational friction motion can be generated between the grinding member 212 and the blade portion 11. Preferably, a pair of limiting columns 311 is installed in the first guide rail 410a, and the first angle adjusting device 230 can only move between the two limiting columns 311, so as to limit the stroke of the grinding member 212.

The guide assembly may further include a second motor 420b and a second guide rail 410b, the tool holding device 100 being movably mounted within the second guide rail 410 b. The tool holder 100 can be driven by the second motor 420b to reciprocate in the second guide 410b, so that a movable rotational frictional motion occurs between the blade portion 11 and the abrasive surface 212 a. Preferably, at least the bottom of the tool fixing device 100 may be made of a metal material, and the magnetic conductive material or the electromagnets 421 are disposed on 2 outer sides of the bottom plate 120, and the guide rail seat has a magnetic conductive material or an electromagnet magnetically engaged with the magnetic conductive material or the electromagnet 421 corresponding to the bottom plate, so that when the tool fixing device 100 is moved to a predetermined position, the positioning electromagnet 421 may be energized, thereby completing the positioning and fixing of the tool fixing device 100.

It should be noted that, any one of the two sets of motors and guide rails can meet the requirements of the present embodiment.

In the above embodiment, the number of the grinder assemblies 200 is one, and each time one blade portion 11 of the tool to be ground 10 is ground, after finishing grinding one blade portion 11 of the tool to be ground 10, the tool to be ground 10 may be removed, and the other blade portion 11 of the tool to be ground 10 may be directed to the grinding member 212, so that the two blade portions 11 are ground respectively.

In other embodiments, as shown in fig. 1, two grinding tool assemblies 200 may be further provided, which are respectively located at two sides of the tool fixing device 100, the two grinding tool assemblies 200 respectively grind the adjacent blade edge portions 11, and the two grinding tool assemblies 200 are staggered in the working state in order to avoid collision or interference between the two grinding members 212.

Further, the guiding assembly may further include a third motor 420c and a third guiding rail 410c, the third guiding rail 410c is located at one side of the tool holder 100 and perpendicular to the predetermined grinding direction, the fixing frame 300 is movably installed in the third guiding rail 410c, and the third motor 420c drives the fixing frame 300 to move close to or away from the tool holder 100, so that the grinding surface 212a of the grinding member 212 is pressed against the blade portion 11 of the tool 10 to be ground or away from the blade portion 11 of the tool 10 to be ground. It is easily understood that, when two grinder assemblies 200 are provided, the tool fixing device 100 has third guide rails 410c at both sides thereof, respectively.

The structure of the guide rail can be as shown in fig. 9, a threaded hole is arranged on the side edge of the guide rail, and the components sliding in the guide rail are fixed through the matching of a screw and the threaded hole. As shown in fig. 10, the sharpener having all the above-mentioned guide rails (the tool fixing device is omitted, and a portion of the sharpener assembly is omitted) is further provided with an upper bracket for connecting a plurality of second fixing members 320, and accordingly, the upper ends of the second fixing members 320 are movably disposed in the upper bracket, and 4 fixing brackets 400 for fixing the guide assembly are further provided.

In some embodiments, a water dripping device may be further disposed on the grinding tool assembly 200 or the tool fixing device 100 for generating water flow and dripping on the grinding member 21 or the blade portion 11 during grinding, thereby reducing the temperature during grinding and carrying away the scraps during grinding. Preferably, mount 300 and cutter fixing device 100 can locate on same base, are equipped with water storage device in the base for the sewage of storage drippage, but this water storage device can communicate the drain pipe of a switch, and convenient to use person retrieves the clearance to sewage.

In some embodiments, the outer periphery of the sharpener has a circumferential ledge to prevent the abrasive member 212 from being damaged during operation, which could cause unsafe conditions.

All power supplies of the knife sharpener are low-voltage direct current safe power supplies.

According to the sharpener provided by the invention, the whole grinding surface 212a and the blade part 11 generate rotary friction motion in the grinding process, so that the whole grinding surface 212a is uniformly worn, the phenomenon of unevenness is avoided, the subsequent grinding is not influenced, the first abutting force application device 220 and the first angle adjusting device 230 work cooperatively, the grinding surface 212a and the blade part 11 are in tight contact, and the contact parts are uniformly stressed, so that the sharpening mode is high in efficiency, and the cutter is ground to be sharper.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims

1. A sharpener, comprising:

the device comprises a cutter fixing device, a grinding tool assembly and a fixing frame;

the cutter fixing device is used for positioning a cutter to be ground;

the grinding tool assembly comprises a driving device and a grinding piece;

2. The sharpener of claim 1 wherein said sharpener assembly further comprises a first abutment force applying means for applying a resilient force in a direction corresponding to the edge portion of the tool to be sharpened, the force applying end of said first abutment force applying means acting on the sharpening member, the abrasive surface of said sharpening member being in intimate contact with the edge portion under the action of said resilient force; or the cutter fixing device is provided with a second abutting force application device which is beneficial to applying elastic force to the direction of the grinding surface on the grinding piece by the cutting edge part of the cutter to be ground, and the cutting edge part on the cutter fixing device is in close contact with the grinding surface on the grinding piece under the action of the elastic force.

3. The sharpener of claim 1, wherein a universal adjustment is used as the first angle adjustment means.

4. The sharpener of claim 1 wherein said tool holding means comprises:

the fixing plate is provided with a through hole penetrating through the fixing plate, the lower surface of the fixing plate is provided with a counter bore corresponding to the through hole of the fixing plate, and the counter bore is coaxial with the corresponding through hole and has a diameter larger than that of the through hole;

the bottom plate is positioned below the fixed plate;

the second angle adjusting device includes:

the guide post is arranged on the upper surface of the bottom plate and is coaxial with the through hole;

one end of the guide post penetrates through a corresponding through hole in the fixing plate and extends above the fixing plate, the radius of the through hole is larger than that of the guide post, and the guide post is provided with an external thread;

the locking piece is positioned above the fixing plate and is in threaded connection with one end of the guide column;

the adjusting nut is close to the bottom plate and is in threaded connection with the guide post;

the spring positioning ring is arranged on the upper surface of the adjusting nut, and the guide post penetrates through the spring positioning ring;

the supporting spring is sleeved on the guide post, one end of the supporting spring is fixedly arranged in a counter bore on the lower surface of the fixing plate, the other end of the supporting spring is arranged in the spring positioning ring, and the fixing plate is tightly pressed between the locking piece and the supporting spring under the elastic force action of the supporting spring;

the cutter fixing device also comprises a clamp which is arranged at the top of the fixing plate and used for fixing the cutter to be ground or an adsorption electromagnet used for adsorbing the cutter to be ground;

when the tool to be ground is placed on the top of the fixing plate and is subjected to downward pressure from the grinding piece, the supporting spring generates upward elastic force, and under the action of the elastic force, the blade part of the tool to be ground is in close contact with the grinding surface of the grinding piece.

5. The sharpener of claim 2 wherein said first abutment forcing means and said second abutment forcing means each comprise:

the elastic piece is used for generating elastic force applied to the direction of the blade part corresponding to the tool to be ground by the force application end, and the elastic piece generates elastic deformation under the action of the reaction force applied to the force application end when the grinding surface of the grinding piece is abutted against the blade part of the tool to be ground, so that the grinding surface in the grinding process is in close contact with the blade part.

6. The sharpener of claim 1, further comprising:

the first motor is used for driving the grinding tool assembly to move through the first guide rail, so that the grinding piece on the grinding tool assembly in the working state movably generates rotary friction motion with the blade part of the tool to be ground along the track of the first guide rail; and/or the second motor and the second guide rail, the second motor drives the cutter fixing device to move through the second guide rail, so that the blade part of the cutter to be ground on the cutter fixing device is movably in rotary friction motion with the grinding surface of the grinding piece; and/or the third motor drives the fixing frame to move through the track of the third guide rail, so that the grinding piece on the grinding tool assembly is contacted with the blade part of the tool to be ground.

7. The sharpener of claim 1 wherein said sharpener assemblies are in two sets, said two sets being located on opposite sides of said tool holder, said sharpening members of said two sets being operatively offset from one another to sharpen different edge portions of the tool to be sharpened.

8. The sharpener of claim 1, said sharpener assembly further comprising:

a telescoping assembly;

the fixed frame comprises a first fixed part and a second fixed part, the first fixed part is used for providing support for the grinding tool assembly, and the second fixed part is connected with the first fixed part through a telescopic assembly;

the telescopic assembly is used for changing the distance between the first fixing piece and the second fixing piece, so that the height of the grinding piece is increased or decreased.

9. The sharpener of claim 1 wherein said grinding member further has another surface corresponding to said grinding surface, said another surface of said grinding member being connected to a rotating shaft of a driving means, said driving means driving said grinding member to rotate by said rotating shaft; the grinding piece is a knife sharpening oilstone.

10. The sharpener of claim 6,

and power supplies used by the driving device, the first motor, the second motor and the third motor are all low-voltage direct-current safe power supplies.