CN213345850U

CN213345850U - Planer tool subassembly and medical planer tool

Info

Publication number: CN213345850U
Application number: CN202021239644.3U
Authority: CN
Inventors: 郭毅军; 王浸宇; 杨雨烟
Original assignee: Chongqing Xishan Science and Technology Co Ltd
Current assignee: Chongqing Xishan Science and Technology Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-06-04
Anticipated expiration: 2030-06-30

Abstract

The utility model relates to a planer tool subassembly and medical planer tool cutter, planer tool subassembly include outer sword pipe, interior sword pipe and stay tube. The front end of the outer cutter pipe is provided with a planer tool window, and the outer cutter pipe is provided with a first bent pipe. The first elbow is a flexible pipe for transmitting torque. The outer knife pipe can be sleeved in the supporting pipe in a mode of rotating around the axis of the outer knife pipe. When the cutting tool works, the inner cutter tube rotates relative to the outer cutter tube under the driving action of the driving handle, the cutting edge at the front end of the inner cutter tube is matched with the planer tool window to cut off cartilage tissues, and the cut cartilage tissues are discharged outwards through the suction opening under the external force suction action. In addition, outer cutter pipe is equipped with first return bend, and first return bend is the hose of transmission moment, and outer cutter pipe can rotate for interior cutter pipe under the exogenic action to can adopt the mode adjustment planer tool window's of directly rotating outer cutter pipe position, the position of the adjustment planer tool window of ability being convenient for need not to adjust like traditional art through the mode of plug dismantlement cutter, labour saving and time saving, work efficiency is higher.

Description

Planer tool subassembly and medical planer tool

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a planer tool subassembly and medical planer tool cutter.

Background

Endoscopic surgery belongs to the category of minimally invasive surgery, and compared with traditional open surgery, minimally invasive surgery has the advantages of small wound, quick recovery, few complications and the like, and is being accepted by more and more patients, and the demands of endoscopic surgery tools such as medical plane knives and the like are also increased rapidly. When performing endoscopic surgery, the inner blade tube of the medical planning blade is spun at a high frequency with respect to its own axis, and the cartilage tissue to be excised is excised.

Among the conventional art, the outer cutter tube of medical planer tool cutter is usually fixed to be set up on drive handle, the interior cutter tube of drive handle drive is for self axis spin with the high frequency, interior cutter tube rotates for outer cutter tube and realizes amputating cartilage tissue, however, in the use, when needing to adjust the planer tool window position on the outer cutter tube, all need the plug to dismantle the cutter, then adjust planer tool window position on the outer cutter tube, treat that planer tool window position adjustment is after errorless, again with drive handle carry out equipment connection, so use comparatively loaded down with trivial details.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need to overcome the drawbacks of the prior art and to provide a planning tool assembly and a medical planning tool, which can facilitate the adjustment of the location of the planning tool window of the outer tool tube.

The technical scheme is as follows: a planer tool assembly, the planer tool assembly comprising: the outer cutter pipe is provided with a planer tool window, the outer cutter pipe is provided with a first bent pipe, the first bent pipe is a flexible pipe for transmitting torque, the outer cutter pipe can be sleeved in the supporting pipe in a rotating mode around the axis of the outer cutter pipe, the supporting pipe is sleeved outside the outer cutter pipe, the front end of the supporting pipe is provided with an opening, and the planer tool window extends out of the opening at the front end of the supporting pipe; interior sword pipe, interior sword pipe is equipped with the second return bend, the second return bend with first return bend position corresponds, the second return bend is the hose of transmission moment, interior sword pipe can be endotheca in outer sword pipe around self axis pivoted mode, the front end of interior sword pipe be equipped with be used for with the planer tool window mutually supports the blade of accomplishing the cutting, interior sword pipe tail end is the suction mouth.

The planer tool assembly is characterized in that the inner cutter tube is provided with a second bent tube which is a flexible tube for transmitting torque when in work, the inner cutter tube rotates relative to the outer cutter tube under the driving action of the driving handle, the cutting edge at the front end of the inner cutter tube is matched with the planer tool window to cut cartilage tissue, and the cut cartilage tissue is outwards discharged through the suction port under the external force suction action. In addition, outer cutter pipe is equipped with first return bend, and first return bend is the hose of transmission moment, and outer cutter pipe can rotate for interior cutter pipe under the exogenic action to can adopt the mode adjustment planer tool window's of directly rotating outer cutter pipe position, the position of the adjustment planer tool window of ability being convenient for need not to adjust like traditional art through the mode of plug dismantlement cutter, labour saving and time saving, work efficiency is higher.

In one embodiment, the hose comprises more than two layers of spiral spring pipes which are sequentially sleeved.

In one embodiment, two or more layers of the helical spring tube are welded together.

In one embodiment, the outer cutter pipe is further provided with a first straight pipe connected with the first bent pipe, and the first straight pipe and the spiral spring pipe at the innermost layer of the first bent pipe form an integrated structure; the inner cutter pipe is further provided with a second straight pipe connected with the second bent pipe, and the second straight pipe and the innermost layer of the second bent pipe form an integrated structure.

In one embodiment, the planer tool assembly further comprises a first support body and a second support body, the first support body is provided with a first channel, the tail end of the outer tool tube is fixedly arranged on the first support body, the first support body is provided with first tapered teeth, and the first tapered teeth are used for being meshed with the second tapered teeth of the driving handle; the tail end of the inner cutter tube penetrates through the first channel and then is connected with the second support body, the second support body is used for being connected with the power rotating shaft of the driving handle, and the tail end of the inner cutter tube can rotate relative to the first support body.

In one embodiment, the planer tool assembly further comprises a first sealing ring disposed in the first passage, and the first sealing ring is sleeved outside the tail end of the inner tool tube.

In one embodiment, a flushing channel is formed between the inner pipe wall of the support pipe and the outer pipe wall of the outer knife pipe.

In one embodiment, the planer tool assembly further comprises a water inlet nozzle, the water inlet nozzle is coaxially provided with a second channel and a third channel, the second channel is communicated with the third channel, the tail part of the outer cutter pipe is rotatably inserted into the second channel, the first support body is rotatably arranged in the third channel, a second sealing ring is arranged in the third channel, and the second sealing ring is sleeved outside the first support body.

In one embodiment, the water inlet nozzle is further provided with a water inlet pipe, the water inlet pipe is communicated with the second channel, the tail end of the supporting pipe is inserted into the second channel, and the supporting pipe is provided with a water inlet correspondingly communicated with the water inlet pipe.

The utility model provides a medical planer tool, includes planer tool subassembly, still includes driving handle, driving handle is used for the drive interior cutter tube rotates, driving handle can also drive outer cutter tube rotates.

When the medical planer tool is in operation, the inner cutter tube is provided with the second bent tube, the second bent tube is a flexible tube for transmitting torque, the inner cutter tube rotates relative to the outer cutter tube under the driving action of the driving handle, the cutting edge at the front end of the inner cutter tube is matched with the planer tool window to cut cartilage tissues, and the cut cartilage tissues are outwards discharged through the suction port under the external force suction action. In addition, outer cutter pipe is equipped with first return bend, and first return bend is the hose of transmission moment, and outer cutter pipe can rotate for interior cutter pipe under the exogenic action to can adopt the mode adjustment planer tool window's of directly rotating outer cutter pipe position, the position of the adjustment planer tool window of ability being convenient for need not to adjust like traditional art through the mode of plug dismantlement cutter, labour saving and time saving, work efficiency is higher.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a planer tool assembly according to an embodiment of the present invention when assembled together;

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

fig. 3 is a schematic structural view of an outer cutter tube and a first supporting body of a planer tool assembly according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a first supporting body of the planer tool assembly according to an embodiment of the present invention;

fig. 5 is a schematic structural view of an inner cutter tube of the planer tool assembly according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a support tube and a water inlet nozzle of the planer tool assembly according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a water inlet nozzle of the planer tool assembly according to an embodiment of the present invention.

10. An outer cutter tube; 11. a planer tool window; 12. a first bend pipe; 13. a first straight pipe; 20. an inner cutter tube; 21. cutting edges; 22. a second bend pipe; 23. a suction port; 24. a second straight pipe; 30. a first support; 31. a first channel; 311. a first groove; 32. a first tapered tooth; 40. a second support; 50. a first seal ring; 60. supporting a tube; 61. a water inlet; 70. a water inlet nozzle; 71. a second channel; 72. a third channel; 721. a second groove; 73. a water inlet pipe; 80. a second seal ring; 100. a helical spring tube.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

Referring to fig. 1 and 2, fig. 1 is a schematic structural view illustrating a planer tool assembly according to an embodiment of the present invention when assembled together; fig. 2 is an exploded view of the planer tool assembly according to an embodiment of the present invention. An embodiment of the utility model provides a pair of planer tool subassembly, planer tool subassembly includes: an outer cutter tube 10, an inner cutter tube 20 and a support tube 60. The front end of the outer knife pipe 10 is provided with a planer tool window 11, and the outer knife pipe 10 is provided with a first bent pipe 12. First bend 12 is a torque transmitting hose. The outer cutter tube 10 is sleeved in the support tube 60 in a manner of rotating around the axis of the outer cutter tube, the support tube 60 is sleeved outside the outer cutter tube 10, an opening is formed in the front end of the support tube 60, and the planer tool window 11 extends out of the opening in the front end of the support tube 60. The inner cutter tube 20 is provided with a second elbow 22. The second bend 22 corresponds in position to the first bend 12. The second bend 22 is a torque transmitting hose. The inner knife tube 20 is sleeved in the outer knife tube 10 in a manner of rotating around the axis of the inner knife tube. The front end of the inner cutter tube 20 is provided with a cutting edge 21 which is used for finishing cutting by being matched with the planer tool window 11, and the tail end of the inner cutter tube 20 is provided with a suction port 23.

When the planer tool assembly works, the inner cutter tube 20 is provided with the second bent tube 22, the second bent tube 22 is a flexible tube for transmitting torque, the inner cutter tube 20 rotates relative to the outer cutter tube 10 under the driving action of the driving handle, the cutting edge 21 at the front end of the inner cutter tube 20 is matched with the planer tool window 11 to cut cartilage tissue, and the cut cartilage tissue is outwards discharged through the suction port 23 under the external force suction action. In addition, outer sword pipe 10 is equipped with first return bend 12, and first return bend 12 is the hose of transmission moment, and outer sword pipe 10 can rotate for interior sword pipe 20 under the exogenic action to can adopt the mode adjustment planer tool window 11's of directly rotating outer sword pipe 10 position, the position of adjustment planer tool window 11 of being convenient for, need not to dismantle the mode adjustment of cutter like traditional technique through the plug, labour saving and time saving, work efficiency is higher.

Furthermore, the elbow can easily reach the tissue to be treated by the operation according to the requirement, and has better adaptability; the hose for transmitting the torque can be a spiral steel wire hose or a steel wire hose in the prior art, and has good flexibility and good torque transmission characteristic; the elbow can be provided with a plurality of sections according to the requirement so as to have better adaptability.

In one embodiment, the hose includes more than two layers of coiled spring tubes 100 nested one within the other.

As an example, the hose illustrated in fig. 2 is, for example, a three-layer helical spring tube 100 that is sleeved in sequence. Specifically, the helical spring tube 100 is formed by helically coiling a spring plate. Wherein, the mode that the spring plate spiral coiled can be that direct external force restraint coils, also can be on the straight tube spiral cut form, the homoenergetic realizes the utility model discloses a purpose. Further, it is understood that the hose may also be a coil spring tube 100 stack employing a single layer, double layers, or other number of layers of coil spring tubes 100. When the number of layers of the helical spring tube 100 constituting the hose is larger, the strength of the hose is higher and the sealing property is better.

The single-layer coil spring tube 100 or the three-layer coil spring tube 100 sequentially fitted to each other may be formed by cutting a pipe member with a laser. As an example, the inner layer spiral spring tube 100 in the three-layer structure is directly formed by cutting on the tube by laser, and the outer layer and the middle layer are sequentially sleeved on the inner layer and welded on the inner layer after the cutting is finished; laser cutting enables accurate helical spring tube 100 and ease of forming.

In one embodiment, more than two layers of the helical spring tube 100 are welded together.

Referring to fig. 2, fig. 3 and fig. 5, fig. 3 is a schematic structural diagram of an outer cutting tube 10 and a first supporting body 30 of a planer tool assembly according to an embodiment of the present invention; fig. 5 illustrates a schematic structural diagram of the inner cutter tube 20 of the planer tool assembly according to an embodiment of the present invention. In one embodiment, the outer cutter tube 10 is further provided with a first straight tube 13 connected to the first bent tube 12, and the first straight tube 13 is formed as an integral structure with the innermost spiral spring tube 100 of the first bent tube 12. In addition, the inner cutter tube 20 is provided with a second straight tube 24 connected to the second bent tube 22, and the second straight tube 24 and the innermost helical spring tube 100 of the second bent tube 22 form an integral structure.

In this way, in the actual production process of the planer tool assembly, the helical spring tube 100 of the innermost layer is formed on the bent portion of the outer cutter tube 10 (the portion corresponding to the first bent tube 12) by, for example, laser cutting, and then one, two or more layers of helical spring tubes 100 are additionally provided on the outer side of the helical spring tube 100 of the innermost layer as needed. Similarly, the innermost helical spring tube 100 is formed at the bent portion of the inner cutter tube 20 (the portion corresponding to the second bent tube 22) by, for example, laser cutting, and then one, two, or more helical spring tubes 100 are additionally provided outside the innermost helical spring tube 100 as needed.

As an alternative, after the first bent pipe 12 of the outer cutter pipe 10 is machined, the first bent pipe 12 and the first straight pipe 13 are welded to obtain the outer cutter pipe 10. Similarly, after the second bent pipe 22 of the inner cutter pipe 20 is machined, the inner cutter pipe 20 is obtained by welding the second bent pipe 22 and the second straight pipe 24.

Referring to fig. 2, 4 and 5, fig. 4 is a schematic structural diagram of a first supporting body 30 of a planer tool assembly according to an embodiment of the present invention. In one embodiment, the planer tool assembly further comprises a first support 30 and a second support 40. The first support 30 is provided with a first channel 31, and the tail end of the outer cutting tube 10 is fixedly arranged on the first support 30. The first support 30 is provided with a first tapered tooth 32, and the first tapered tooth 32 is engaged with a second tapered tooth of the driving handle, and is used for driving the first support 30 to rotate around the self axis, so as to drive the outer cutter tube 10 to rotate around the self axis, and adjust the position of the planer tool window 11. The tail end of the inner knife tube 20 passes through the first channel 31 and then is connected with the second support 40, the second support 40 is used for being connected with a power rotating shaft of the driving handle, and the tail end of the inner knife tube 20 can rotate relative to the first support 30.

In one embodiment, the planer tool assembly further comprises a first seal ring 50 disposed within the first passageway 31. The first sealing ring 50 is sleeved outside the tail end of the inner cutter tube 20. The first sealing ring 50 is, for example, a self-tightening sealing ring, and can ensure a tight sealing fit between the outer wall of the tail end of the inner cutter tube 20 and the inner wall of the first channel 31. Further, in order to stably mount the first sealing ring 50 in the first channel 31, a first groove 311 adapted to the first sealing ring 50 is formed on an inner wall of the first channel 31.

Referring to fig. 2 and 6, fig. 6 is a schematic structural diagram of a supporting tube 60 and a water inlet nozzle 70 of a planer tool assembly according to an embodiment of the present invention. In one embodiment, the inner tube wall of the support tube 60 and the outer tube wall of the outer knife tube 10 form a flushing channel therebetween. In this way, during operation, water can be fed through the irrigation channel to the surgical site, for example for cleaning operations or for cooling the cutting head.

Referring to fig. 2, 6 and 7, fig. 7 is a schematic structural diagram of a water inlet nozzle 70 of a planer tool assembly according to an embodiment of the present invention. In one embodiment, the planer tool assembly further includes a water inlet nozzle 70. The water inlet nozzle 70 is coaxially provided with a second channel 71 and a third channel 72, the second channel 71 is communicated with the third channel 72, the tail part of the outer cutter pipe 10 is rotatably inserted into the second channel 71, the first supporting body 30 is rotatably arranged in the third channel 72, a second sealing ring 80 is arranged in the third channel 72, and the second sealing ring 80 is sleeved outside the first supporting body 30. Specifically, the aperture of the second channel 71 is smaller than that of the third channel 72, so that the cross sections of the second channel 71 and the third channel 72 are stepped structures, and the first support 30 is limited in the axial direction. In addition, in order to achieve a stable arrangement of the second sealing ring 80 in the third channel 72, the inner wall of the third channel 72 is provided with, for example, a second groove 721 adapted to the second sealing ring 80.

In one embodiment, the inlet nozzle 70 is further provided with an inlet pipe 73. The water inlet pipe 73 is communicated with the second channel 71, the tail end of the support pipe 60 is inserted into the second channel 71, and the support pipe 60 is provided with a water inlet 61 correspondingly communicated with the water inlet pipe 73.

Referring to fig. 1 and 2, in one embodiment, a medical planer tool includes the planer tool assembly of any one of the above embodiments, and further includes a driving handle, the driving handle is used for driving the inner tool tube 20 to rotate, and the driving handle can also drive the outer tool tube 10 to rotate.

When the medical planer tool is in operation, the inner cutter tube 20 is provided with the second bent tube 22, the second bent tube 22 is a flexible tube for transmitting torque, the inner cutter tube 20 rotates relative to the outer cutter tube 10 under the driving action of the driving handle, the cutting edge 21 at the front end of the inner cutter tube 20 is matched with the planer window 11 to cut cartilage tissue, and the cut cartilage tissue is discharged outwards through the suction port 23 under the external force suction action. In addition, outer sword pipe 10 is equipped with first return bend 12, and first return bend 12 is the hose of transmission moment, and outer sword pipe 10 can rotate for interior sword pipe 20 under the exogenic action to can adopt the mode adjustment planer tool window 11's of directly rotating outer sword pipe 10 position, the position of adjustment planer tool window 11 of being convenient for, need not to dismantle the mode adjustment of cutter like traditional technique through the plug, labour saving and time saving, work efficiency is higher.

It should be noted that, in infringement comparison, the "water inlet pipe" may be a part of the "water inlet nozzle", that is, the "water inlet pipe" and the "other part of the water inlet nozzle" are integrally formed; or an independent component which can be separated from other parts of the water inlet nozzle, namely the water inlet pipe can be manufactured independently and then combined with other parts of the water inlet nozzle into a whole. In one embodiment, as shown in fig. 7, the "water inlet pipe" is a part of the "water inlet nozzle" which is manufactured integrally.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

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", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship 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.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims

1. A planer tool assembly, wherein the planer tool assembly comprises:

the outer cutter pipe is provided with a planer tool window, the outer cutter pipe is provided with a first bent pipe, the first bent pipe is a flexible pipe for transmitting torque, the outer cutter pipe can be sleeved in the supporting pipe in a rotating mode around the axis of the outer cutter pipe, the supporting pipe is sleeved outside the outer cutter pipe, the front end of the supporting pipe is provided with an opening, and the planer tool window extends out of the opening at the front end of the supporting pipe;

interior sword pipe, interior sword pipe is equipped with the second return bend, the second return bend with first return bend position corresponds, the second return bend is the hose of transmission moment, interior sword pipe can be endotheca in outer sword pipe around self axis pivoted mode, the front end of interior sword pipe be equipped with be used for with the planer tool window mutually supports the blade of accomplishing the cutting, interior sword pipe tail end is the suction mouth.

2. The planer tool assembly of claim 1 wherein the hose comprises two or more layers of helical spring tubing in nested arrangement.

3. The planer tool assembly of claim 2 wherein two or more layers of the helical spring tube are welded together.

4. The planer tool assembly of claim 2 wherein the outer tool tube is further provided with a first straight tube connected to the first bent tube, the first straight tube forming an integral structure with the innermost helical spring tube of the first bent tube; the inner cutter pipe is further provided with a second straight pipe connected with the second bent pipe, and the second straight pipe and the innermost layer of the second bent pipe form an integrated structure.

5. The planer tool assembly of claim 1 further comprising a first support and a second support, said first support having a first passageway, said trailing end of said outer blade tube being fixedly disposed on said first support, said first support having first tapered teeth thereon for intermeshing with said second tapered teeth of said drive handle; the tail end of the inner cutter tube penetrates through the first channel and then is connected with the second support body, the second support body is used for being connected with the power rotating shaft of the driving handle, and the tail end of the inner cutter tube can rotate relative to the first support body.

6. The planer tool assembly of claim 5 further comprising a first seal disposed within the first passageway, the first seal being disposed outwardly of the trailing end of the inner tool tube.

7. The planer tool assembly of claim 6 wherein a flushing passage is formed between the inner pipe wall of the support pipe and the outer pipe wall of the outer tool pipe.

8. The planer tool assembly of claim 7, further comprising a water inlet tap, wherein the water inlet tap is coaxially provided with a second channel and a third channel, the second channel is communicated with the third channel, the tail of the outer tool tube is rotatably inserted into the second channel, the first support body is rotatably arranged in the third channel, a second sealing ring is arranged in the third channel, and the second sealing ring is sleeved outside the first support body.

9. The planer tool assembly of claim 8, wherein the water inlet nozzle is further provided with a water inlet pipe, the water inlet pipe is communicated with the second channel, the tail end of the support pipe is inserted into the second channel, and the support pipe is provided with a water inlet correspondingly communicated with the water inlet pipe.

10. A medical planing tool including a planing tool assembly according to any one of claims 1 to 9 and further including a drive handle for driving rotation of the inner blade tube, the drive handle also being capable of driving rotation of the outer blade tube.