CN211985566U

CN211985566U - Grinding tool

Info

Publication number: CN211985566U
Application number: CN201921624796.2U
Authority: CN
Inventors: 秦双立; 秦永亭; 李广智; 倪杰; 王士珍; 张晓蕾
Original assignee: Jiangsu College of Nursing
Current assignee: Jiangsu College of Nursing
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-11-24
Anticipated expiration: 2029-09-26

Abstract

The utility model discloses a grinding cutter relates to medical instrument technical field, include: the grinding machine comprises a power assembly, a holding assembly and a grinding assembly, wherein the power assembly comprises a power assembly body, a power cavity, a motor and a power shaft, and the holding assembly comprises a holding assembly body, a transmission cavity, a positioning piece and a transmission shaft; the positioning piece comprises a positioning flange, a positioning piece body and a positioning cavity, and the transmission shaft is arranged in the positioning cavity; the grinding assembly comprises a grinding assembly body, a mounting cavity, a supporting rod, a grinding cavity, a grinding shaft, a cleaning cavity, a cleaning pipe and a drill bit. When the bone tissue is operated, the cleaning pipe is connected with an external dust collector and used for sucking out bone residues generated in the grinding process, and the generated bone residues can not shield the sight of a doctor for observing the bone tissue. Therefore, the technical problem that in the process of grinding bone tissues, the generated bone residues easily shield the sight of a doctor for observing the bone tissues and have the hidden trouble that the grinding head is wound on peripheral soft tissues is solved.

Description

Grinding tool

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a grinding cutter.

Background

A scalpel is typically composed of a blade and a handle. The blade is usually provided with a cutting edge and a mounting groove butted with the scalpel handle, and the blade is usually made of pure titanium, titanium alloy, stainless steel or carbon steel and is generally disposable. When in dissection, the knife edge is used for cutting the skin and the muscle, the knife tip is used for repairing the blood vessel and the nerve, and the knife handle is used for blunt separation. The blade and the knife handle with proper models are selected according to the size of the wound. Because the common surgical knife has the characteristic of zero damage to tissues after cutting, the surgical knife can be applied to various operations, but the wound surface after cutting is active in bleeding, the surgical knife is controllably applied to the operations with more bleeding, the surgical knife is an indispensable important surgical tool in the surgical operation, and the safety of the surgical knife is very important for a doctor and a patient.

In the process of bone surgery, the surrounding tissues are easily damaged by adopting a conventional scalpel; at this time, a surgical tool with a burr is required to grind the bone tissue or soft tissue of the human body. Generally, a manual knife handle is adopted to directly drive a grinding head to rotationally grind bone tissues; however, bone debris generated during the process of grinding bone tissue tends to obstruct the view of a doctor for observing the bone tissue, and may be entangled with surrounding soft tissues during the operation. Under the condition of high-speed rotation of the grinding head or the drill, the soft tissue can be stranded once being wound; in particular, the damage degree to soft tissues such as blood vessels, nerves and the like is high, and the damage of the cutting edge of the grinding head or the drill bit to patients is very large.

Therefore, in the prior art, the grinding head is directly driven by the manual knife handle to rotate and grind the bone tissue, and in the process of grinding the bone tissue, the generated bone residues easily block the sight of a doctor for observing the bone tissue, so that the technical problem of hidden danger that the grinding head is wound around peripheral soft tissues exists.

SUMMERY OF THE UTILITY MODEL

The utility model provides a grinding cutter for solve among the prior art manual handle of a knife direct drive bistrique and rotate the grinding to bone tissue, carry out the grinding in-process to bone tissue, the bone sediment of production shelters from the sight that the doctor surveyed bone tissue easily, has the technical problem of the hidden danger of bistrique winding soft tissue on every side.

The embodiment of the utility model provides a grinding cutter, include: the grinding machine comprises a power assembly, a holding assembly and a grinding assembly, wherein the power assembly is connected with the grinding assembly through the holding assembly, and the holding assembly is used for transmitting the power of the power assembly to the grinding assembly; wherein the content of the first and second substances,

the power assembly comprises a power assembly body, a power cavity, a motor and a power shaft, the power assembly body is connected with the holding assembly, the power cavity is formed in the power assembly body, the motor is arranged in the power cavity and connected with the inner wall of the power assembly body, and two ends of the power shaft are respectively connected with a rotor of the motor and the holding assembly;

the holding assembly comprises a holding assembly body, a transmission cavity, a positioning piece and a transmission shaft, the power assembly body is connected with the grinding assembly through the holding assembly body, the transmission cavity is formed in the holding assembly body, the positioning piece is arranged in the transmission cavity and connected with the inner wall of the holding assembly body, and the transmission shaft is arranged in the positioning piece; the positioning piece comprises a positioning flange, a positioning piece body and a positioning cavity, the positioning piece body is arranged in the transmission cavity and is connected with the inner wall of the holding component body through the positioning flange, the positioning cavity is formed in the positioning piece body, and the transmission shaft is arranged in the positioning cavity;

the grinding subassembly includes the grinding subassembly body, the installation cavity, the bracing piece, the grinding chamber, the grinding axle, the clearance chamber, the clearance pipe, and the drill bit, cut the subassembly body and control this body coupling of subassembly, the installation cavity is seted up on the grinding subassembly body, the bracing piece sets up in the installation cavity and with this body coupling of grinding subassembly, the grinding chamber is all seted up on the bracing piece with the clearance chamber, the grinding axle sets up and outwards stretches out in the one end of grinding intracavity and keeping away from the power component direction, the drill bit sets up the one end of outwards stretching out at the grinding axle, the one end that the clearance pipe setting just kept away from the drill bit outwards stretches out in the clearance intracavity.

Preferably, the handle assembly further comprises an outer row of tubes, the handle assembly body is provided with an outer row of holes, one end of each outer row of tubes is connected with one end, extending outwards, of each cleaning tube, and one end, far away from the end connected with the cleaning tubes, of each outer row of tubes extends outwards through the outer row of holes.

Preferably, the handle assembly body is provided with a fixing piece, the fixing piece comprises a fixing seat, a flexible positioning rod and a fixing ring, the fixing ring is connected with the fixing seat through the flexible positioning rod, the fixing ring is connected with the outer wall of the outer discharge pipe, and the fixing seat is connected with the handle assembly body.

Preferably, the cleaning pipe is provided with a connecting buckle, and the cleaning pipe is connected with the grinding assembly body through the connecting buckle.

Preferably, the connecting buckle comprises a clamping plate and a connecting bolt which are fixedly arranged on the outer wall of the cleaning pipe, the clamping plate is provided with a mounting hole matched with the connecting bolt, the grinding assembly body is provided with a connecting hole matched with the bolt, and the connecting bolt penetrates through the mounting hole and then is connected with the grinding assembly body through the matching with the connecting hole.

Preferably, the grinding assembly further comprises a flexible connecting ring, the grinding assembly body is provided with a mounting groove matched with the flexible connecting ring, and the flexible connecting ring is arranged in the mounting groove;

the supporting rod is provided with a connecting groove matched with the flexible connecting ring, and the supporting rod is connected with the grinding component body through the matching between the connecting groove and the flexible connecting ring arranged in the mounting groove.

Preferably, an arc-shaped protection head is arranged at one end of the support rod, which is far away from the holding component.

Preferably, one end of the grinding shaft close to the power assembly and one end of the power shaft close to the grinding assembly are respectively provided with a first connecting piece, one end of the transmission shaft close to the grinding shaft and one end of the transmission shaft close to the power shaft are respectively provided with a second connecting piece matched with the first connecting piece, and the transmission shaft is respectively connected with the power shaft and the grinding shaft through the matching of the second connecting piece and the first connecting piece.

Preferably, the first connecting piece comprises a connecting cavity and a clamping head, and the connecting cavity is formed in the clamping head;

the second connecting piece is a connector matched with the connecting cavity, and the transmission shaft is respectively connected with the power shaft and the grinding shaft through the matching between the connectors arranged at the two ends and the clamping heads.

Preferably, the end of the power assembly body close to the grinding assembly body and the end of the grinding assembly body close to the power assembly body are respectively provided with an external thread connecting piece, the end of the holding assembly body close to the power assembly body and the end of the holding assembly body close to the power assembly body are respectively provided with an internal thread connecting piece matched with the external thread connecting piece, and the holding assembly body is respectively connected with the power assembly body and the grinding assembly body through the matching of the external thread connecting piece and the internal thread connecting piece.

To sum up, the utility model provides a grinding cutter relates to medical instrument technical field, include: the grinding machine comprises a power assembly, a holding assembly and a grinding assembly, wherein the power assembly is connected with the grinding assembly through the holding assembly, and the holding assembly is used for transmitting the power of the power assembly to the grinding assembly; the power assembly comprises a power assembly body, a power cavity, a motor and a power shaft, wherein the power assembly body is connected with the holding assembly, the power cavity is formed in the power assembly body, the motor is arranged in the power cavity and connected with the inner wall of the power assembly body, and two ends of the power shaft are respectively connected with a rotor of the motor and the holding assembly; the holding assembly comprises a holding assembly body, a transmission cavity, a positioning piece and a transmission shaft, the power assembly body is connected with the grinding assembly through the holding assembly body, the transmission cavity is formed in the holding assembly body, the positioning piece is arranged in the transmission cavity and connected with the inner wall of the holding assembly body, and the transmission shaft is arranged in the positioning piece; the positioning piece comprises a positioning flange, a positioning piece body and a positioning cavity, the positioning piece body is arranged in the transmission cavity and is connected with the inner wall of the holding component body through the positioning flange, the positioning cavity is formed in the positioning piece body, and the transmission shaft is arranged in the positioning cavity; the grinding subassembly includes the grinding subassembly body, the installation cavity, the bracing piece, the grinding chamber, the grinding axle, the clearance chamber, the clearance pipe, and the drill bit, cut the subassembly body and control this body coupling of subassembly, the installation cavity is seted up on the grinding subassembly body, the bracing piece sets up in the installation cavity and with this body coupling of grinding subassembly, the grinding chamber is all seted up on the bracing piece with the clearance chamber, the grinding axle sets up and outwards stretches out in the one end of grinding intracavity and keeping away from the power component direction, the drill bit sets up the one end of outwards stretching out at the grinding axle, the one end that the clearance pipe setting just kept away from the drill bit outwards stretches out in the clearance intracavity. When the grinding cutter provided by the embodiment is used for surgery, the cleaning pipe is connected with the external dust collector and used for sucking out bone residues generated in the grinding process, and the generated bone residues can not shield the sight of a doctor for observing bone tissues. With this technical problem of having solved among the prior art manual handle of a knife direct drive bistrique and having rotated the grinding to bone tissue, carrying out the grinding in-process to bone tissue, the sight that the doctor was surveyed to bone tissue is sheltered from easily to the bone sediment that produces, has bistrique winding soft tissue around hidden danger.

The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the present invention is given.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic perspective view of a grinding tool according to an embodiment of the present invention;

fig. 2 is an exploded view of a grinding tool according to an embodiment of the present invention;

FIG. 3 is a block diagram of a grinding assembly according to an embodiment of the present invention;

fig. 4 is a partial enlarged view of a grinding assembly according to an embodiment of the present invention.

Icon: 10-grinding the tool; 100-a power assembly; 200-a handle member; 300-grinding the assembly; 110-a power assembly body; 120-a power cavity; 130-a motor; 140-a power shaft; 210-a grip body; 220-a transmission cavity; 230-a positioning element; 240-a drive shaft; 231-a flange; 232-positioning member body; 233-positioning chamber; 310-grinding the assembly body; 320-a mounting cavity; 330-support rods; 340-grinding the cavity; 350-grinding the shaft; 360-cleaning the cavity; 370-cleaning the tube; 380-a drill bit; 250-outer row of tubes; 260-outer row holes; 270-a fixing member; 271-a fixed seat; 272-a flexible positioning rod; 273-fixing ring; 390-connecting fastener; 391-a clamping plate; 392-connecting bolts; 101-a flexible connecting ring; 102-a mounting groove; 103-connecting groove; 104-arc protection head; 410-a first connector; 420-a second connector; 411-a connecting cavity; 412-a snap head; 421-a connector; 510-an externally threaded connection; 520-internal threaded connection.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

Referring to fig. 1 to 4, a grinding tool 10 according to an embodiment of the present invention includes: a power module 100, a handle module 200, and a grinding module 300, wherein the power module 100 is connected to the grinding module 300 via the handle module 200, and the handle module 200 is used for transmitting the power of the power module 100 to the grinding module 300; wherein the content of the first and second substances,

the power assembly 100 comprises a power assembly body 110, a power cavity 120, a motor 130 and a power shaft 140, wherein the power assembly body 110 is connected with the holding assembly 200, the power cavity 120 is arranged on the power assembly body 110, the motor 130 is arranged in the power cavity 120 and connected with the inner wall of the power assembly body 110, and two ends of the power shaft 140 are respectively connected with a rotor of the motor 130 and the holding assembly 200;

the holding assembly 200 comprises a holding assembly body 210, a transmission cavity 220, a positioning member 230 and a transmission shaft 240, the power assembly body 110 is connected with the grinding assembly 300 through the holding assembly body 210, the transmission cavity 220 is arranged on the holding assembly body 210, the positioning member 230 is arranged in the transmission cavity 220 and connected with the inner wall of the holding assembly body 210, and the transmission shaft 240 is arranged in the positioning member 230; the positioning member 230 comprises a positioning flange 231, a positioning member body 232 and a positioning cavity 233, the positioning member body 232 is arranged in the transmission cavity 220 and connected with the inner wall of the holding member body 210 through the positioning flange 231, the positioning cavity 233 is arranged on the positioning member body 232, and the transmission shaft 240 is arranged in the positioning cavity 233;

the grinding assembly 300 comprises a grinding assembly body 310, a mounting cavity 320, a supporting rod 330, a grinding cavity 340, a grinding shaft 350, a cleaning cavity 360, a cleaning pipe 370 and a drill bit 380, the grinding assembly body is connected with a holding assembly body 210, the mounting cavity 320 is arranged on the grinding assembly body 310, the supporting rod 330 is arranged in the mounting cavity 320 and connected with the grinding assembly body 310, the grinding cavity 340 and the cleaning cavity 360 are arranged on the supporting rod 330, the grinding shaft 350 is arranged in the grinding cavity 340 and one end far away from the direction of the power assembly 100 extends outwards, the drill bit 380 is arranged at one end, extending outwards, of the grinding shaft 350, and the cleaning pipe 370 is arranged in the cleaning cavity 360 and one end far away from the drill bit 380 extends outwards.

In specific implementation, the drill 380 may be made of different materials according to specific use scenarios; for example, the drill 380 may be made of stainless steel or fine sand; also, a variety of diameters and shapes may be used, such as a rotating blade. The power assembly body 110, the holding assembly body 210, and the grinding assembly body 310 may also be made of different shapes and materials, so as to facilitate the operation of the surgical knife. The power assembly 100 may include a battery receiving cavity for receiving a built-in battery to supply power to the motor 130. Meanwhile, an external power line may be provided to supply power to the motor 130 through the external power line. The positioning member 230 is provided to transmit the power generated by the motor 130 to the grinding shaft 350 through the transmission shaft 240, so that the surgical knife does not shake violently due to the rotation of the motor 130.

When the grinding tool 10 provided by the embodiment is used for surgery, the cleaning tube 370 is connected with an external dust collector, and is used for sucking out bone residues generated in the grinding process, and the generated bone residues cannot block the view of a doctor for observing bone tissues. Wherein, the power of the dust collector is not too large, and only the suction force for sucking out the bone dregs is needed to be provided. With this technical problem of having solved among the prior art manual handle of a knife direct drive bistrique and having rotated the grinding to bone tissue, carrying out the grinding in-process to bone tissue, the sight that the doctor was surveyed to bone tissue is sheltered from easily to the bone sediment that produces, has bistrique winding soft tissue around hidden danger.

Preferably, the handle body 210 further comprises an outer row of tubes 250, the handle body 210 is provided with an outer row of holes 260, one end of the outer row of tubes 250 is connected with the end of the cleaning tube 370 extending outwards, and the end of the outer row of tubes 250 away from the end connected with the cleaning tube 370 extends outwards through the outer row of holes 260.

In specific implementation, one end of the outer discharge pipe 250, which is far away from the end connected with the cleaning pipe 370, is connected with an external dust suction device, and is used for discharging bone residues in the cleaning pipe 370 through the outer discharge pipe 250 and collecting the discharged bone residues. The cleaning pipe 370 is ensured to clean the generated bone residues at any time, so that the generated bone residues can not block the sight of the doctor for observing the bone tissues.

Preferably, the holder body 210 is provided with a fixing member 270, the fixing member 270 includes a fixing seat 271, a flexible positioning rod 272, and a fixing ring 273, the fixing ring 273 is connected to the fixing seat 271 via the flexible positioning rod 272, the fixing ring 273 is connected to the outer wall of the outer discharge pipe 250, and the fixing seat 271 is connected to the holder body 210.

In a specific implementation, in order to prevent the sliding of the outer discharge pipe 250 from interfering with the operation of the doctor on the patient using the surgical knife, the holder body 210 is provided with a fixing seat 271 for fixing the outer discharge pipe 250. Set up flexible locating lever 272, be favorable to the doctor when using the operation cutter, change the fixed direction of outer calandria 250 according to specific demand, solid fixed ring 273 is for carrying out the joint to outer calandria 250, guarantees the stability that outer calandria 250 and mounting 270 are connected.

Preferably, the cleaning tube 370 is provided with a connection buckle 390, and the cleaning tube 370 is connected with the grinding assembly body 310 through the connection buckle 390.

In specific implementation, the cleaning pipe 370 is easily contaminated in the pipe during use, so the cleaning pipe 370 needs to be detached for cleaning, and the connecting buckle 390 is provided to facilitate detachment of the cleaning pipe 370.

Preferably, the connection buckle 390 comprises a clamping plate 391 and a connection bolt 392 fixedly arranged on the outer wall of the cleaning pipe 370, the clamping plate 391 is provided with a mounting hole matched with the connection bolt 392, the grinding assembly body 310 is provided with a connection hole matched with the bolt, and the connection bolt 392 passes through the mounting hole and then is connected with the grinding assembly body 310 through matching with the connection hole.

In specific implementation, in order to ensure the connection stability between the cleaning pipe 370 and the grinding assembly body 310, a mounting hole matched with the connecting bolt 392 is formed in the clamping plate 391, the grinding assembly body 310 is provided with a connecting hole matched with the bolt, and the connecting bolt 392 penetrates through the mounting hole and then is connected with the grinding assembly body 310 through the matching with the connecting hole. What adopt in this embodiment is an optimal connected mode, and is not limited to the utility model discloses can only adopt this kind of connected mode, can also use threaded connection, lock joint, or other detachable connected modes to connect to guarantee stability and the detachability of being connected between clearance pipe 370 and the grinding subassembly body 310.

Preferably, the grinding assembly 300 further comprises a flexible connecting ring 101, the grinding assembly body 310 is provided with a mounting groove 102 matched with the flexible connecting ring 101, and the flexible connecting ring 101 is arranged in the mounting groove 102;

the support rod 330 is provided with a coupling groove 103 matching with the flexible coupling ring 101, and the support rod 330 is coupled with the grinding assembly body 310 by the coupling between the coupling groove 103 and the flexible coupling ring 101 disposed in the mounting groove 102.

In specific implementation, the supporting rod 330 placed in the mounting cavity 320 is prevented from being separated from the mounting cavity 320 when the grinding assembly 300 is produced, so that the supporting rod 330 is arranged in the accommodating cavity and cannot easily fall out.

Preferably, an end of the support bar 330 remote from the grip assembly 200 is provided with an arc-shaped protective head 104.

In particular, the arc-shaped protective head 104 is arranged to achieve directional bone tissue grinding without damaging other tissues around the grinding position.

Preferably, one end of the grinding shaft 350 close to the power assembly 100 and one end of the power shaft 140 close to the grinding assembly 300 are respectively provided with a first connecting piece 410, one end of the transmission shaft 240 close to the grinding shaft 350 and one end close to the power shaft 140 are respectively provided with a second connecting piece 420 matched with the first connecting piece 410, and the transmission shaft 240 is respectively connected with the power shaft 140 and the grinding shaft 350 through the matching of the second connecting piece 420 and the first connecting piece 410.

In specific implementation, in order to enable the power output by the power shaft 140 to be transmitted to the grinding shaft 350 through the transmission shaft 240, a first connecting piece 410 is respectively arranged at one end of the grinding shaft 350 close to the power assembly 100 and one end of the power shaft 140 close to the grinding assembly 300, a second connecting piece 420 matched with the first connecting piece 410 is respectively arranged at one end of the transmission shaft 240 close to the grinding shaft 350 and one end of the transmission shaft 140 close to the power shaft 140, and the transmission shaft 240 is respectively connected with the power shaft 140 and the grinding shaft 350 through the matching of the second connecting piece 420 and the first connecting piece 410. The output of power is proved; at the same time, the stability of the drill 380 connected to the grinding shaft 350 is also ensured.

Preferably, the first connector 410 includes a connection cavity 411 and a snap head 412, the connection cavity 411 is opened on the snap head 412;

the second connector 420 is a connector 421 matched with the connecting cavity 411, and the transmission shaft 240 is respectively connected with the power shaft 140 and the grinding shaft 350 through the matching between the connectors 421 and the clamping heads 412 arranged at the two ends.

In specific implementation, the transmission shaft 240 and the power shaft 140 and the grinding shaft 350 may be connected by different power connection methods, and the connection method is not limited to this connection method. It will be clear that other detachable connections can also be used for the connection.

Preferably, an external thread connecting piece 510 is respectively arranged at one end of the power assembly body 110 close to the grinding assembly body 310 and one end of the grinding assembly body 310 close to the power assembly body 110, an internal thread connecting piece 520 matched with the external thread connecting piece 510 is respectively arranged at one end of the holding assembly body 210 close to the power assembly body 110 and one end of the holding assembly body 210 close to the power assembly body 110, and the holding assembly body 210 is respectively connected with the power assembly body 110 and the grinding assembly body 310 through the matching of the external thread connecting piece 510 and the internal thread connecting piece 520.

In particular, the power module body 110, the handle body 210, and the grinding module body 310 may be connected to each other in various ways. In the present embodiment, an external threaded connection 510 is respectively disposed at one end of the power assembly body 110 close to the grinding assembly body 310 and one end of the grinding assembly body 310 close to the power assembly body 110, an internal threaded connection 520 matched with the external threaded connection 510 is respectively disposed at one end of the holding assembly body 210 close to the power assembly body 110 and one end of the holding assembly body 210 close to the power assembly body 110, and the holding assembly body 210 is respectively connected with the power assembly body 110 and the grinding assembly body 310 through the matching of the external threaded connection 510 and the internal threaded connection 520.

In short, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A grinding tool, comprising: the grinding machine comprises a power assembly, a holding assembly and a grinding assembly, wherein the power assembly is connected with the grinding assembly through the holding assembly, and the holding assembly is used for transmitting the power of the power assembly to the grinding assembly; wherein the content of the first and second substances,

the power assembly body is connected with the grinding assembly through the holding assembly body, the transmission cavity is formed in the holding assembly body, the positioning piece is arranged in the transmission cavity and connected with the inner wall of the holding assembly body, and the transmission shaft is arranged in the positioning piece; the positioning piece comprises a positioning flange, a positioning piece body and a positioning cavity, the positioning piece body is arranged in the transmission cavity and is connected with the inner wall of the holding component body through the positioning flange, the positioning cavity is formed in the positioning piece body, and the transmission shaft is arranged in the positioning cavity;

the grinding assembly comprises a grinding assembly body, an installation cavity, a supporting rod, a grinding cavity, a grinding shaft, a cleaning cavity, a cleaning pipe and a drill bit, the grinding assembly body is connected with a holding assembly body, the installation cavity is arranged on the grinding assembly body, the supporting rod is arranged in the installation cavity and connected with the grinding assembly body, the grinding cavity is arranged on the cleaning cavity, the cleaning cavity is arranged on the supporting rod, the grinding shaft is arranged in the grinding cavity and is kept away from one end of the power assembly direction, the drill bit is arranged at one end of the grinding shaft extending outwards, and the cleaning pipe is arranged in the cleaning cavity and is kept away from one end of the drill bit extending outwards.

2. The grinding tool of claim 1 further comprising an outer row of tubes, wherein the handle body defines an outer row of holes, one end of the outer row of tubes is connected to the outwardly extending end of the cleaning tube, and the other end of the outer row of tubes, which is distal from the end connected to the cleaning tube, extends outwardly through the outer row of holes.

3. The grinding tool of claim 2 wherein the handle body is provided with a fixture, the fixture comprising a fixture seat, a flexible positioning rod, and a retaining ring, the retaining ring being connected to the fixture seat by the flexible positioning rod, the retaining ring being connected to an outer wall of the outer row of tubes, the fixture seat being connected to the handle body.

4. The grinding tool of claim 2 wherein the cleaning tube is provided with a connector link by which the cleaning tube is connected to the grinding assembly body.

5. The grinding tool according to claim 4, wherein the connecting fastener comprises a clamping plate fixedly arranged on the outer wall of the cleaning pipe and a connecting bolt, the clamping plate is provided with a mounting hole matched with the connecting bolt, the grinding assembly body is provided with a connecting hole matched with the bolt, and the connecting bolt is connected with the grinding assembly body through matching with the connecting hole after penetrating through the mounting hole.

6. The grinding tool of claim 1 wherein the grinding assembly further comprises a flexible attachment ring, the grinding assembly body being provided with a mounting slot that mates with the flexible attachment ring, the flexible attachment ring being disposed within the mounting slot;

the supporting rod is provided with a connecting groove matched with the flexible connecting ring, and the supporting rod is connected with the grinding assembly body through the matching between the connecting groove and the flexible connecting ring arranged in the mounting groove.

7. The grinding tool of claim 1 wherein an end of the support bar remote from the handle member is provided with an arcuate guard head.

8. The grinding tool of claim 1 wherein the end of the grinding shaft adjacent the power assembly and the end of the power shaft adjacent the grinding assembly are each provided with a first connector, the end of the drive shaft adjacent the grinding shaft and the end of the power shaft adjacent the power shaft are each provided with a second connector to which the first connector mates, and the drive shaft is connected to the power shaft and the grinding shaft, respectively, by engagement of the second connectors with the first connectors.

9. The grinding tool of claim 8 wherein said first link includes a link cavity and a snap head, said link cavity opening on said snap head;

the second connecting piece is a connector matched with the connecting cavity, and the transmission shaft is respectively connected with the power shaft and the grinding shaft through the connectors arranged at two ends and the matching between the clamping heads.

10. The grinding tool according to any one of claims 1 to 9, wherein an end of the power unit body close to the grinding unit body and an end of the grinding unit body close to the power unit body are respectively provided with an external threaded connector, an end of the holding unit body close to the power unit body and an end of the holding unit body close to the power unit body are respectively provided with an internal threaded connector matching with the external threaded connector, and the holding unit body is respectively connected with the power unit body and the grinding unit body through the matching of the external threaded connector and the internal threaded connector.