CN211053266U

CN211053266U - Sharpener with replaceable grinding head

Info

Publication number: CN211053266U
Application number: CN201921838000.3U
Authority: CN
Inventors: 冯积标
Original assignee: Yangjiang Lici Technology Co ltd
Current assignee: Yangjiang Lici Technology Co ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-07-21
Anticipated expiration: 2029-10-29

Abstract

The utility model discloses a sharpener with a replaceable grinding head. The sharpener with the replaceable grinding head comprises a sharpener body and the grinding head which are detachably connected; a circuit board, a motor and a first transmission piece are arranged inside the machine body, the motor is electrically connected with the circuit board, and the first transmission piece is connected with an output shaft of the motor; at least one grinding wheel is arranged inside the grinding head, a rotating shaft is connected to the grinding wheel, the rotating shaft is connected with one end of a second transmission piece, and the other end of the second transmission piece is used for being connected with the first transmission piece; the grinding head is provided with at least one cutter groove corresponding to the grinding wheel. The utility model discloses can change suitable bistrique according to actual need to convenient to use practices thrift the cost more.

Description

Sharpener with replaceable grinding head

Technical Field

The utility model relates to the technical field of daily life apparatus, in particular to sharpener of removable bistrique.

Background

The cutter generally turns from sharp to round after long-term use, and the cutter needs to be sharpened in order to keep the cutter in normal use. A common family can own a knife stone and sharpen the knife by a manual mode. However, the force and direction of sharpening the knife can not be grasped, so that the knife is worn and the service life of the knife is influenced.

Some electric knife sharpeners also appear in the prior art, and the structure of a common electric knife sharpener is as follows: a motor and a grinding wheel are arranged in the machine body, a guide groove is formed in the upper cover of the machine shell, a power supply is turned on during grinding, the grinding wheel is driven by the motor to rotate rapidly, and a knife is inserted into a knife groove in the upper portion of the knife grinder to achieve automatic knife grinding.

However, most of electric knife sharpeners in the prior art only have one grinding head, which can only realize rough grinding or fine grinding, and has single function and inconvenient use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sharpener of removable bistrique can solve one or more among the above-mentioned prior art problem.

According to one aspect of the utility model, a sharpener with a replaceable grinding head is provided, which comprises a machine body and a grinding head which are detachably connected;

a circuit board, a motor and a first transmission piece are arranged inside the machine body, the motor is electrically connected with the circuit board, and the first transmission piece is connected with an output shaft of the motor;

at least one grinding wheel is arranged inside the grinding head, a rotating shaft is connected to the grinding wheel, the rotating shaft is connected with one end of a second transmission piece, and the other end of the second transmission piece is used for being connected with the first transmission piece;

the grinding head is provided with at least one cutter groove corresponding to the grinding wheel.

The beneficial effects of the utility model reside in that: because in the knife sharpener provided by the utility model, the machine body and the grinding head are detachably connected, the grinding head can be replaced according to the actual requirement, for example, when the knife needs to be coarsely ground, the grinding head can be replaced by the grinding head used for coarsely grinding the knife; when the tool needs to be finely ground, the grinding head can be replaced by a grinding head for finely grinding the tool; when the cutter needs to be finely ground, the grinding head can be replaced by a grinding head for finely grinding the cutter; when the scissors need to be polished, the grinding head can be replaced by a grinding head for polishing the scissors; when the screwdriver needs to be polished, the grinding head can be replaced by a grinding head for polishing the screwdriver, and the like, so that the screwdriver is more convenient to use, and the cost is saved.

In some embodiments, one end of the grinding head, which is used for being connected with the machine body, is provided with a clamping hook, the clamping hook comprises a hook body part and a supporting part which are connected, a first clamping groove is formed between the hook body part and the supporting part, and the machine body is used for being provided with a first clamping block matched with the first clamping groove at one end, which is connected with the grinding head. Because the end of the grinding head, which is used for being connected with the machine body, is provided with the clamping hook, the clamping hook comprises a hook body part and a supporting part which are connected, a first clamping groove can be formed between the hook body part and the supporting part, and the end of the machine body, which is used for being connected with the grinding head, is provided with a first clamping block matched with the first clamping groove, so that the grinding head can be firmly fixed on the machine body by clamping the first clamping block into the first clamping groove; when the grinding head needs to be replaced, only the first clamping block on the machine body needs to be separated from the first clamping groove on the grinding head. Therefore, the arrangement can realize the detachable connection between the machine body and the grinding head, simplify the structure of the machine body and the grinding head and bring more convenience to operation.

In some embodiments, one end of the first block, which is used for being matched with the first slot, is provided with a curved surface. Therefore, the curved surface is arranged at the end, matched with the first clamping groove, of the first clamping block, so that the first clamping block can be clamped into the first clamping groove when the grinding head is required to be mounted on the machine body, and the first clamping block can be separated from the first clamping groove when the grinding head is required to be dismounted from the machine body.

In some embodiments, a first notch is formed at one end of the first clamping block, which is used for being matched with the first clamping groove. Therefore, the first clamping block is used for being provided with the first notch at one end matched with the first clamping groove, so that the first clamping block can be clamped into the first clamping groove when the grinding head is required to be installed on the machine body, and the first clamping block can be separated from the first clamping groove when the grinding head is required to be detached from the machine body.

In some embodiments, a button is disposed on the body at a position corresponding to the hook body, the button can be close to and away from the hook body, and a spring is sleeved outside the button. Therefore, the button is arranged at the position, corresponding to the hook body, of the machine body, and can be close to and far away from the hook body, so that when the grinding head needs to be detached from the machine body, the head of the button can be pressed inwards to enable the bottom of the button to be in contact with the hook body and apply pressure to the hook body, the hook body can move inwards, the first clamping groove is separated from the first clamping block, and the grinding head can be detached from the machine body. In addition, as the spring is sleeved outside the button, when the hand leaves the button, the button can restore to the initial position under the elastic force of the spring, so that the other grinding head can be conveniently installed on the machine body.

In some embodiments, the two sides of the hook are both provided with second notches. From this, through all set up the second breach in the both sides of trip, can be convenient for more press inwards during the button, work as the bottom of button with during colluding the body portion and contacting, the button is right collude the pressure that the body portion produced and can make first draw-in groove with first fixture block breaks away from mutually to save more laborsaving, the operation of being convenient for more.

In some embodiments, a second clamping groove is further formed in one end, connected with the grinding head, of the machine body, and a second clamping block matched with the second clamping groove is arranged at one end, connected with the machine body, of the grinding head. From this, through the fuselage be used for with the one end that the bistrique links to each other sets up the second draw-in groove the bistrique be used for with the one end that the fuselage links to each other sets up the second fixture block, works as from this the bistrique is close to during the fuselage, the second fixture block can be gone into in the second draw-in groove to can be through mutually supporting second fixture block and second draw-in groove, further improve the bistrique with the fastness of connecting between the fuselage, and then can further improve the utility model provides a stability of sharpener in the use.

In some embodiments, the first transmission member and the second transmission member are both a coupler, the first transmission member is provided with a plurality of clamping jaws, and the second transmission member is provided with a plurality of bayonets matched with the clamping jaws. Because, first driving medium with the second driving medium is the shaft coupling, from this, can improve the utility model provides a stability of sharpener in the use. In addition, the first transmission part is provided with a plurality of clamping jaws, the second transmission part is provided with a plurality of bayonets matched with the clamping jaws, and therefore the first transmission part and the second transmission part can be connected through the clamping jaws and the bayonets matched with each other, the first transmission part can be driven to rotate through the motor, the rotating first transmission part drives the second transmission part connected with the first transmission part to rotate, and then the rotating second transmission part drives the grinding wheel blade connected with the first transmission part to rotate, so that the grinding of the cutter is completed.

In some embodiments, the inside of the body is provided with a mounting position for supporting the first transmission member, and the first transmission member can rotate relative to the mounting position. Therefore, the installation position used for supporting the first transmission piece is arranged in the machine body, so that the first transmission piece can be installed more conveniently, the first transmission piece can be supported, and the stability of the first transmission piece in the operation process is improved.

In some embodiments, one end of the machine body, which is far away from the grinding head, is provided with a switch and a power socket for an external power supply, and the bottom surface of the machine body is provided with a support plate along the axial direction of the machine body, and the support plate is provided with support legs. Therefore, the switch is arranged at one end of the machine body, which is far away from the grinding head, so that the running state of the motor can be controlled through the switch, and the operation is more convenient; through the fuselage keep away from the one end of bistrique sets up power socket, can pass through power socket external power supply is right motor and circuit board etc. supply power. In addition, through the bottom surface of fuselage sets up the backup pad along its axial, the accessible the backup pad will the utility model provides a sharpener firmly fixes on holding surfaces such as desktop, thereby improves the utility model provides a sharpener is at the stability of use. In addition, because be equipped with the stabilizer blade in the backup pad, can make the backup pad with certain clearance has between the desktop, avoids backup pad and supporting surface direct contact such as desktop, and then can prevent effectively that water on the supporting surface such as desktop from entering into the utility model provides an among the sharpener and influence sharpener's normal use.

Drawings

Fig. 1 is a schematic view of an overall structure of a sharpener with a replaceable grinding head according to an embodiment of the present invention;

fig. 2 is a schematic view of a partial structure of a sharpener with a replaceable grinding head according to an embodiment of the present invention;

FIG. 3 is a partial enlarged view of the portion A in FIG. 2;

FIG. 4 is a partial enlarged view of the portion B in FIG. 2;

fig. 5 is a cross-sectional view of a sharpener with a replaceable grinding head according to an embodiment of the present invention;

fig. 6 is a schematic view of another angle of the sharpener with a replaceable grinding head according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a body of the sharpener with a replaceable grinding head according to an embodiment of the present invention;

fig. 8 is a schematic view of a partial structure of a body of the sharpener with a replaceable grinding head according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a grinding head in the sharpener with a replaceable grinding head according to an embodiment of the present invention.

Wherein the reference numbers are as follows:

-100 of a fuselage; grinding head-200; a circuit board-110; -a motor-120; a first transmission member-130; grinding wheel-210; a rotating shaft-220; a second transmission member-230; a knife slot-240; a clamping hook-250; hook-251; a support portion-252; a first card slot-253; a first block-140; curved surface-141; a first notch-142; -150 a push button; a spring-160; a second gap-260; a second card slot-170; a second fixture block-270; a jaw-131; a bayonet-231; mounting position-180; switch-300; a power outlet-400; a support plate-500; leg-510.

Detailed Description

The knife sharpener with replaceable grinding head according to the present invention will be described in detail with reference to fig. 1 to 9 and the following embodiments. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

To make the objects, features and advantages of the present invention more comprehensible, please refer to the attached drawings. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limitation of the implementation of the present invention, so that the present invention does not have the essential significance in the technology, and any modification of the structure, change of the ratio relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the function and the achievable purpose of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Moreover, it is noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Fig. 1 schematically shows a sharpener with replaceable grinding heads according to an embodiment of the present invention, fig. 2 schematically shows a local structural schematic diagram of the sharpener with replaceable grinding heads according to an embodiment of the present invention, fig. 3 is a local enlarged structural schematic diagram of a portion a in fig. 2, fig. 4 is a local enlarged structural schematic diagram of a portion B in fig. 2, fig. 5 schematically shows a cross-sectional view of the sharpener with replaceable grinding heads according to an embodiment of the present invention, fig. 6 schematically shows an overall structural schematic diagram of another angle of the sharpener with replaceable grinding heads according to an embodiment of the present invention, fig. 7 schematically shows a structural schematic diagram of a body in the sharpener with replaceable grinding heads according to an embodiment of the present invention, fig. 8 schematically shows a local structural schematic diagram of a body in the sharpener with replaceable grinding heads according to an embodiment of the present invention Fig. 9 schematically shows a schematic structural view of a grinding head in a sharpener capable of replacing the grinding head according to an embodiment of the present invention.

As shown in fig. 1 to 6, the sharpener with replaceable grinding heads includes a body 100 and grinding heads 200 detachably connected.

As shown in fig. 1 to 6, a circuit board 110, a motor 120 and a first transmission member 130 are disposed inside the body 100, the motor 120 is electrically connected to the circuit board 110, and the first transmission member 130 is connected to an output shaft of the motor 120; at least one grinding wheel 210 is arranged inside the grinding head 200, a rotating shaft 220 is connected to the grinding wheel 210, the rotating shaft 220 is connected with one end of a second transmission piece 230, and the other end of the second transmission piece 230 is used for being connected with the first transmission piece 130; the grinding head 200 is provided at the outer portion thereof with at least one cutter groove 240 provided corresponding to the grinding wheel 210. Therefore, when the tool needs to be ground, an appropriate grinding head 200 is selected to be connected with the machine body 100, the tool is inserted into the tool slot 240, the motor 120 is started, the running motor 120 drives the first transmission piece 130 to rotate, the rotating first transmission piece 130 drives the second transmission piece 230 to rotate, and the rotating second transmission piece 230 drives the grinding wheel 210 to rotate, so that the grinding of the tool is completed.

It can be seen that, because the sharpener of the present invention is detachably connected between the main body 100 and the grinding head 200, the grinding head 200 can be replaced according to actual needs, for example, when the tool needs to be coarsely ground, the grinding head 200 can be replaced by the grinding head 200 for coarsely grinding the tool; when the tool needs to be finely ground, the grinding head 200 can be replaced by the grinding head 200 for finely grinding the tool; when the tool needs to be finely ground, the grinding head 200 can be replaced by the grinding head 200 for finely grinding the tool; when the scissors need to be polished, the grinding head 200 can be replaced by the grinding head 200 for polishing the scissors; when the screwdriver needs to be polished, the grinding head 200 can be replaced by the grinding head 200 for polishing the screwdriver, so that the use is more convenient, and the cost is saved.

Preferably, as shown in fig. 8 and 9, the first transmission member 130 and the second transmission member 230 are both shaft couplings, a plurality of claws 131 are arranged on the first transmission member 130, and a plurality of bayonets 231 matched with the claws 131 are arranged on the second transmission member 230. Because, first driving medium 130 with second driving medium 230 is the shaft coupling, from this, can improve the utility model provides a stability of sharpener in the use. In addition, since the first transmission member 130 is provided with the plurality of claws 131, and the second transmission member 230 is provided with the plurality of bayonets 231 matched with the claws 131, the first transmission member 130 and the second transmission member 230 can be connected through the mutually matched claws 131 and bayonets 231, so that the first transmission member 130 can be driven to rotate by the motor 120, the rotating first transmission member 130 drives the second transmission member 230 connected therewith to rotate, and the rotating second transmission member 230 drives the grinding wheel 210 connected therewith to rotate, thereby finishing the grinding of the cutter.

Preferably, as shown in fig. 2, a mounting position 180 for supporting the first transmission member 130 is provided inside the body 100, and the first transmission member 130 is capable of rotating relative to the mounting position 180. Therefore, the installation position 180 for supporting the first transmission member 130 is arranged in the body 100, so that the installation of the first transmission member 130 is facilitated, the first transmission member 130 can be supported, and the stability of the first transmission member 130 in the operation process is improved.

Preferably, as shown in fig. 1, the end of the body 100 away from the grinding head 200 is provided with a switch 300. Therefore, by arranging the switch 300 at the end of the body 100 far away from the grinding head 200, the running state of the motor 120 can be controlled through the switch 300, and the operation is more convenient.

Preferably, an end of the body 100 away from the grinding head 200 is provided with a power socket 400 for an external power supply. Thus, by providing the power socket 400 at the end of the body 100 away from the grinding head 200, a power source can be externally connected through the power socket 400 to supply power to the motor 120, the circuit board 110, and the like.

Preferably, as shown in fig. 1, the bottom surface of the body 100 is provided with a support plate 500 along the axial direction thereof. From this, through the bottom surface of fuselage 100 sets up backup pad 500, accessible along its axial backup pad 500 will the utility model provides a sharpener firmly fixes on holding surfaces such as desktop, thereby improves the utility model provides a sharpener is at the stability of in-process of use.

Preferably, as shown in fig. 6, the supporting plate 500 is provided with legs 510. Because be equipped with stabilizer blade 510 on the backup pad 500, can make the backup pad 500 with have certain clearance between the desktop, avoid holding surface direct contact such as backup pad 500 and desktop, and then can prevent effectively that water on the holding surface such as desktop from entering into the utility model provides an among the sharpener and influence sharpener's normal use.

Preferably, as shown in fig. 3 and 9, a hook 250 is disposed at one end of the grinding head 200 connected to the body 100, the hook 250 has certain elasticity, the hook 250 includes a hook body 251 and a support 252 connected to each other, a first engaging groove 253 is formed between the hook body 251 and the support 252, and a first engaging block 140 engaged with the first engaging groove 253 is disposed at one end of the body 100 connected to the grinding head 200. Since the end of the grinding head 200, which is used to be connected with the body 100, is provided with the hook 250, the hook 250 comprises the hook body 251 and the supporting part 252 which are connected, a first clamping groove 253 can be formed between the hook body 251 and the supporting part 252, and the end of the body 100, which is used to be connected with the grinding head 200, is provided with the first clamping block 140 which is matched with the first clamping groove 253, so that the grinding head 200 can be firmly fixed on the body 100 by clamping the first clamping block 140 into the first clamping groove 253; when the grinding head 200 needs to be replaced, the first clamping block 140 on the machine body 100 is only required to be separated from the first clamping groove 253 on the grinding head 200. Therefore, the arrangement not only can realize the detachable connection between the machine body 100 and the grinding head 200, but also can simplify the structures of the machine body 100 and the grinding head 200, and is more convenient to operate.

Preferably, as shown in fig. 8, one end of the first latch 140, which is used for being matched with the first latching groove 253, is provided with a curved surface 141. Therefore, by providing the curved surface 141 at one end of the first fixture block 140 for being matched with the first clamping groove 253, when the grinding head 200 needs to be mounted on the machine body 100, the first fixture block 140 can be clamped into the first clamping groove 253, and when the grinding head 200 needs to be dismounted from the machine body 100, the first fixture block 140 can be separated from the first clamping groove 253.

Preferably, as shown in fig. 7, one end of the first latch 140, which is used for being matched with the first latch groove 253, is provided with a first notch 142. Therefore, the first notch 142 is formed at one end of the first fixture block 140, which is used for being matched with the first clamping groove 253, so that the first fixture block 140 can be clamped into the first clamping groove 253 when the grinding head 200 needs to be mounted on the machine body 100, and the first fixture block 140 can be separated from the first clamping groove 253 when the grinding head 200 needs to be dismounted from the machine body 100.

Preferably, as shown in fig. 5, a button 150 is disposed on the body 100 at a position corresponding to the hook 251, the button 150 can be close to and far from the hook 251, and a spring 160 is sleeved outside the button 150. Therefore, by arranging the button 150 at a position on the body 100 corresponding to the hook part 251, and the button 150 can be close to and away from the hook part 251, when the grinding head 200 needs to be detached from the body 100, the head of the button 150 can be pressed inwards to make the bottom of the button 150 contact with the hook part 251 and apply pressure to the hook part 251, so that the hook part 251 can also move inwards, the first clamping groove 253 is separated from the first clamping block 140, and the grinding head 200 can be detached from the body 100. In addition, since the button 150 is externally sleeved with the spring 160, when the human hand leaves the button 150, the button 150 can be restored to the original position by the elastic force of the spring 160, thereby facilitating the mounting of the other grinding head 200 to the body 100.

Preferably, as shown in fig. 9, the two sides of the hook 250 are both provided with second notches 260. Therefore, the second notches 260 are formed on both sides of the hook 250, so that when the button 150 is pressed inward, and when the bottom of the button 150 contacts the hook 251, the first locking groove 253 can be separated from the first locking block 140 by the pressure of the button 150 on the hook 251, which is labor-saving and convenient to operate.

Preferably, as shown in fig. 7, a second clamping groove 170 is further formed at one end of the body 100, which is used for being connected with the grinding head 200, and a second clamping block 270, which is matched with the second clamping groove 170, is formed at one end of the grinding head 200, which is used for being connected with the body 100. From this, through the fuselage 100 be used for with the one end that bistrique 200 links to each other sets up second draw-in groove 170 bistrique 200 be used for with the one end that fuselage 100 links to each other sets up second fixture block 270, works as from this bistrique 200 is close to when fuselage 100, second fixture block 270 can be gone into in the second draw-in groove 170 to can be through mutually supporting second fixture block 270 and second draw-in groove 170, further improve bistrique 200 with the fastness of being connected between the fuselage 100, and then can further improve the utility model provides a stability of sharpener in the use.

In summary, because the sharpener provided by the present invention is detachably connected between the sharpener body and the grinding head, the grinding head can be replaced according to actual needs, for example, when the tool needs to be coarsely ground, the grinding head can be replaced by the grinding head for coarsely grinding the tool; when the tool needs to be finely ground, the grinding head can be replaced by a grinding head for finely grinding the tool; when the cutter needs to be finely ground, the grinding head can be replaced by a grinding head for finely grinding the cutter; when the scissors need to be polished, the grinding head can be replaced by a grinding head for polishing the scissors; when the screwdriver needs to be polished, the grinding head can be replaced by a grinding head for polishing the screwdriver, and the like, so that the screwdriver is more convenient to use, and the cost is saved.

The above description is only for the description of the preferred embodiments of the present invention, and not for any limitation of the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all included in the protection scope of the claims. It will be apparent to those skilled in the art that various changes and modifications may be made to the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The sharpener with the replaceable grinding head is characterized by comprising a sharpener body (100) and a grinding head (200) which are detachably connected;

a circuit board (110), a motor (120) and a first transmission piece (130) are arranged inside the machine body (100), the motor (120) is electrically connected with the circuit board (110), and the first transmission piece (130) is connected with an output shaft of the motor (120);

at least one grinding wheel (210) is arranged in the grinding head (200), a rotating shaft (220) is connected to the grinding wheel (210), the rotating shaft (220) is connected with one end of a second transmission piece (230), and the other end of the second transmission piece (230) is used for being connected with the first transmission piece (130);

the grinding head (200) is externally provided with at least one cutter groove (240) corresponding to the grinding wheel (210).

2. The sharpener with the replaceable grinding head as claimed in claim 1, wherein a clamping hook (250) is arranged at one end of the grinding head (200) connected with the main body (100), the clamping hook (250) comprises a hook body portion (251) and a supporting portion (252) which are connected, a first clamping groove (253) is formed between the hook body portion (251) and the supporting portion (252), and a first clamping block (140) matched with the first clamping groove (253) is arranged at one end of the main body (100) connected with the grinding head (200).

3. The sharpener of claim 2, wherein the end of the first block (140) for fitting with the first slot (253) is provided with a curved surface (141).

4. The sharpener of claim 2, wherein the first block (140) has a first notch (142) at an end for fitting with the first slot (253).

5. The sharpener with replaceable grinding heads according to claim 2, wherein a button (150) is arranged on the body (100) at a position corresponding to the hook body (251), the button (150) can be close to and far away from the hook body (251), and a spring (160) is sleeved outside the button (150).

6. The sharpener of claim 5, wherein the hook (250) has second notches (260) on both sides.

7. The sharpener with replaceable grinding heads according to claim 2, wherein a second clamping groove (170) is further formed in one end, connected with the grinding head (200), of the machine body (100), and a second clamping block (270) matched with the second clamping groove (170) is formed in one end, connected with the machine body (100), of the grinding head (200).

8. The sharpener of claim 1, wherein the first transmission member (130) and the second transmission member (230) are both shaft couplings, the first transmission member (130) is provided with a plurality of clamping jaws (131), and the second transmission member (230) is provided with a plurality of clamping openings (231) which are matched with the clamping jaws (131).

9. The sharpener of replaceable grinding heads according to claim 1, wherein the body (100) is internally provided with a mounting location (180) for supporting the first transmission member (130), the first transmission member (130) being rotatable relative to the mounting location (180).

10. The sharpener with replaceable grinding heads according to any one of claims 1 to 9, wherein one end of the machine body (100) far away from the grinding head (200) is provided with a switch (300) and a power socket (400) for an external power supply, the bottom surface of the machine body (100) is provided with a support plate (500) along the axial direction thereof, and the support plate (500) is provided with legs (510).