Disposable sterile planing cutter head and planing cutter

Abstract

The invention discloses a disposable sterile planing cutter head and a planing cutter, and relates to the technical field of medical instruments, the disposable sterile planing cutter head comprises a cutter body and a limiting step, and the limiting step is arranged on the cutter body; the cutter body is installed in a limited mode through the limiting step. The planing knife comprises a machine body assembly and a front cap assembly, the disposable sterile planing knife head is installed on the machine body assembly and the front cap assembly in a matched mode, the front cap assembly comprises a front cap body, a button base is installed at one end of the front cap body in a sliding mode, and one end of the button base penetrates through the front cap body to be connected with a button. An elastic piece is arranged between the button and the front cap body, and a fourth bearing is arranged in the front cap body. By means of the structure, the planing cutter head can be directly installed and detached from the front end of the planing cutter, a component at the front end of the planing cutter does not need to be detached, pollution of the used planing cutter head to other components is avoided, and the installation time is further saved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a disposable sterile shaving cutter head and a shaving cutter. Background Art

[0002] In the field of medical surgery, as an important surgical instrument, a shaving cutter is often used in orthopedic surgeries to grind the edges of bones to make them flat and smooth, so as to facilitate subsequent surgical operations or the fixation of implants. The traditional design of a shaving cutter usually includes a shaving cutter body and a detachable shaving cutter head. This design allows doctors to replace shaving cutter heads of different shapes and sizes according to surgical needs. However, this traditional design has some inherent problems and deficiencies.

[0003] Firstly, the installation and disassembly process of the traditional shaving cutter head is relatively cumbersome. Doctors need to first disassemble the front-end components of the shaving cutter and then install and remove the shaving cutter head. This process not only takes a long time, increasing the time cost of the surgery, but also is prone to errors during the operation, affecting the accuracy and safety of the surgery.

[0004] Secondly, since the traditional shaving cutter head needs to come into frequent contact with the front-end components of the shaving cutter during the installation and disassembly process, this increases the risk of contamination of other components by the used shaving cutter head. In a medical environment, any form of contamination may pose a potential threat to the health of patients. Therefore, reducing the risk of contamination is one of the important considerations in the design of medical devices. Summary of the Invention

[0005] The purpose of the present invention is to provide a disposable sterile shaving cutter head and a shaving cutter, which can directly install and disassemble the shaving cutter head from the front end of the shaving cutter without disassembling the front-end components of the shaving cutter, and solve the problems that the installation and disassembly time of the shaving cutter head is relatively long, increasing the time cost of the surgery, and the used shaving cutter head is prone to cause contamination risks to other components.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A disposable sterile shaving cutter head, comprising:

[0008] A cutter body,

[0009] A limiting step, the limiting step is arranged on the cutter body;

[0010] The cutter body is installed in a limited way through the limiting step.

[0011] As a further scheme of the present invention: A shaving cutter, comprising a body assembly and a front cap assembly, and the above-mentioned disposable sterile shaving cutter head is cooperatively installed on the body assembly and the front cap assembly.

[0012] The front cap assembly is installed at one end of the fuselage assembly;

[0013] The front cap assembly includes a front cap body. A button seat is slidably installed at one end of the front cap body. One end of the button seat passes through the front cap body and is connected to a button. An elastic member is provided between the button and the front cap body. A bearing four is provided inside the front cap body;

[0014] The disposable sterile cutting head is installed into the fuselage assembly from the side of the front cap body where the button seat is installed and is limited by the button seat.

[0015] As a further solution of the present invention: The fuselage assembly includes a housing insert. A housing rear end cover is installed at one end of the housing insert. A housing sleeve is nested at the other end of the housing insert. A rubber sleeve is sleeved on the housing sleeve. The housing sleeve is connected to the front cap assembly. A drive assembly and a connection assembly are provided inside the housing insert.

[0016] As a further solution of the present invention: The drive assembly includes a motor front end cover and a motor rear end cover. A brushless motor is provided between the motor front end cover and the motor rear end cover. A motor housing is provided outside the brushless motor. A motor shaft is provided in the brushless motor.

[0017] As a further solution of the present invention: A motor housing sleeve is sleeved outside the motor housing. The motor housing sleeve is arranged inside the housing sleeve in a penetrating manner, and the motor housing sleeve is in fit connection with the front cap body.

[0018] As a further solution of the present invention: The connection assembly includes a motor connection sleeve. The motor connection sleeve is sleeved on the motor shaft. A bearing spacer is provided outside the motor connection sleeve. The other end of the bearing spacer abuts against a bearing three.

[0019] As a further solution of the present invention: A first cooling system is provided in the fuselage assembly. The first cooling system includes a water inlet channel one provided inside the motor seal cover, a water inlet channel two formed between the motor seal cover and the housing insert, a water inlet channel three formed between the motor housing sleeve and the housing insert, a water inlet channel four formed between the housing sleeve and the motor housing sleeve, a water inlet channel five opened at the head of the housing sleeve, and a circular water channel one opened at the head of the housing sleeve;

[0020] Among them, the water inlet channel one, the water inlet channel two, the water inlet channel three, the water inlet channel four, the water inlet channel five, and the circular water channel one are interconnected.

[0021] As a further solution of the present invention: a second cooling system is provided in the front cap assembly, and the second cooling system includes a second annular water channel opened at one end of the front cap body, a water spraying waterway opened inside the front cap body, and a water spraying port communicated with the water spraying waterway, wherein the other end of the water spraying waterway is communicated with the second annular water channel.

[0022] As a further solution of the present invention: a cutter head mounting hole is opened inside the front cap body, the button seat includes a moving body, and an assembly hole is opened in the middle of the moving body;

[0023] When the disposable sterile cutting head is installed, press the button to make the assembly hole of the moving body correspond to the cutter head mounting hole.

[0024] As a further solution of the present invention: the step surface of the limiting step of the disposable sterile cutting head is arranged with a gap from the bearing four or the moving body;

[0025] The gap is set to be 0.5 mm or less.

[0026] The beneficial effects of the present invention:

[0027] The present invention provides a front cap assembly with a pressing and installing structure. By manually pressing the button, the button presses the elastic member and the button seat, and the button seat moves outwards, so that the tail of the cutter body passes through the button seat and the front cap body and is installed into the fuselage assembly. It is directly installed and disassembled from the front end of the cutting head, without disassembling the front-end components of the cutting head, further saving the installation time, reducing the operation time cost, and avoiding the pollution of other components by the used cutting head, reducing the pollution risk. At the same time, the cutting head after being installed from the front end can be stably limited by the limiting step and work normally.

[0028] The present invention also cools down the entire cutting head structure by setting the first cooling system and the second cooling system in combination, and by arranging the second annular water channel on the front cap body, it can realize the connection of the cooling system water channels without precise alignment when installing the front cap assembly, so that the installation and disassembly of the front cap assembly and the connection of the cooling system water channels do not interfere with each other. Description of the Drawings

[0029] The present invention will be further described below with reference to the drawings.

[0030] Figure 1 is the overall structural schematic diagram of the cutting head of the present invention;

[0031] Figure 2 is the overall sectional structural schematic diagram of the cutting head of the present invention;

[0032] Figure 3 is Figure 2 the enlarged structural schematic diagram of area A in

[0033] Figure 4 is Figure 2 Schematic diagram of the enlarged structure of area B in

[0034] Figure 5 is Figure 2 Schematic diagram of the enlarged structure of area C in

[0035] Figure 6 Schematic diagram of the rear end cover structure of the casing of the present invention;

[0036] Figure 7 Schematic diagram of the motor seal cover structure of the present invention;

[0037] Figure 8 Schematic diagram of the connection structure between the rear end cover of the motor and bearing 1 of the present invention;

[0038] Figure 9 Schematic diagram of the motor connection sleeve structure of the present invention;

[0039] Figure 10 Schematic diagram of the motor housing sleeve structure in the second embodiment of the present invention;

[0040] Figure 11 Schematic diagram of the casing sleeve structure of the present invention;

[0041] Figure 12 Schematic diagram of the cross-sectional structure of the casing sleeve of the present invention;

[0042] Figure 13 Schematic diagram of the motor housing sleeve structure in the fifth embodiment of the present invention;

[0043] Figure 14 Schematic diagram of the mating structure between the motor housing sleeve and the casing insert in the fifth embodiment of the present invention;

[0044] Figure 15 Schematic diagram of the front cap assembly structure of the present invention Figure 1 ;

[0045] Figure 16 Schematic diagram of the front cap assembly structure of the present invention Figure 2 ;

[0046] Figure 17 Schematic diagram of the cross-sectional structure of the cooperation between the front cap assembly and the planing cutter head of the present invention;

[0047] Figure 18 is Figure 17 Schematic diagram of the enlarged structure of area D in

[0048] Figure 19 Schematic diagram of the cross-sectional structure of the front cap body of the present invention;

[0049] Figure 20Schematic diagram of the position of the water spray nozzle of the present invention;

[0050] Figure 21 Schematic diagram of the structure of the button seat of the present invention;

[0051] Figure 22 Schematic diagram of the structure of the button of the present invention;

[0052] Figure 23 Schematic diagram of the mating structure of the button and the button seat of the present invention;

[0053] Figure 24 Schematic diagram of the water spray waterway structure of the present invention;

[0054] Figure 25 Schematic diagram of the structure of the disposable sterile shaving cutter head of the present invention.

[0055] In the figure: 1. Body assembly; 11. Rear end cover of the machine shell; 1100. Channel; 1101. Locking boss; 1102. Clamping table; 12. Motor sealing cover; 1201. First through hole; 13. Rear end cover of the motor; 1301. Second through hole; 14. First bearing; 15. Brushless motor; 16. Front end cover of the motor; 17. Motor housing; 18. Motor housing sleeve; 181. Support rib; 19. Insert in the machine shell; 110. Machine shell sleeve; 1103. Sector water channel; 1104. Water inlet; 1105. Insertion groove; 111. Rubber sleeve; 112. Second bearing; 113. Motor shaft; 114. Motor connection sleeve; 1401. Square assembly groove; 115. Bearing spacer; 116. Third bearing; 118. First sealing ring; 119. Second sealing ring; 120. First water inlet channel; 121. Second water inlet channel; 122. Third water inlet channel; 123. Fourth water inlet channel; 124. Fifth water inlet channel; 125. First annular water channel; 126. Third sealing ring; 127. Fourth sealing ring; 2. Front cap assembly; 21. Front cap body; 210. Second annular water channel; 211. Installation groove; 212. Pressing groove; 213. First mating circular groove; 214. Second mating circular groove; 215. Cutter head installation hole; 216. Water spray nozzle; 217. Water spray waterway; 22. Button seat; 221. Button mating part; 222. Moving body; 223. Assembly hole; 224. Connecting part; 23. Button; 231. Pressing body; 232. Connecting body; 233. Connecting hole; 234. Ring groove; 24. Fourth bearing; 25. Elastic member; 3. Knife body; 31. Limiting step. Detailed implementation manners

[0056] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0057] Embodiment 1

[0058] As Figure 25 shown, this embodiment provides a disposable sterile shaving cutter head, which includes a cutter body 3 and a limit step 31 provided on the cutter body 3. The cutter body 3 includes a working front end and a mounting tail end, and the position of the limit step 31 on the cutter body 3 can be set according to different mounting requirements. The limit step 31 cooperates with the mounting tail end of the cutter body 3 to be mounted and combined with other components of the shaving cutter to form a complete shaving cutter for performing a one-time bone edge grinding operation.

[0059] It should be noted that during the bone edge grinding operation, the above-mentioned shaving cutter head is a disposable sterile replacement structure, and after use, it needs to be collected as medical waste and then undergo harmless treatment; and compared with the traditional disposable shaving cutter head that requires disassembling the front-end components of the shaving cutter and then installing and removing them, the shaving cutter head of this embodiment can be directly installed and disassembled from the front end of the shaving cutter without disassembling the front-end components of the shaving cutter, further saving installation time and avoiding contamination of other components by the used shaving cutter head. And through the limit step 31, the shaving cutter head after being installed from the front end can be stably limited and work normally.

[0060] Embodiment 2

[0061] As Figures 1 - 25 shown, this embodiment provides a shaving cutter, which includes a body assembly 1, a front cap assembly 2, and the disposable sterile shaving cutter head in the above-mentioned Embodiment 1 installed in the body assembly 1. The shaving cutter head in Embodiment 1 is assembled in cooperation with the front cap assembly 2, and the shaving cutter head can be installed and disassembled from the front end of the front cap assembly 2, making the replacement of the disposable sterile shaving cutter head more convenient. At the same time, after assembly, the axial movement of the cutter body 3 can be restricted.

[0062] As Figures 1 - 5 shown, the above-mentioned body assembly 1 includes a housing insert 19. A housing rear end cover 11 is installed at the tail of the housing insert 19, a housing sleeve 110 is nested at the front end of the housing insert 19, and a rubber sleeve 111 is sleeved on the housing sleeve 110. The tail of the housing insert 19 is cylindrical, and the housing rear end cover 11 is inserted into the circular cavity inside the housing insert 19 and locked by screws. The threaded holes opened on the axial surface of the inserted part of the housing rear end cover 11 are reverse threads, so that the screws are tightened in reverse to avoid accidental disassembly.

[0063] Furthermore, a driving assembly and a connecting assembly are arranged in the inner circular cavity of the housing insert 19. The driving assembly includes a motor front end cover 16 away from the rear end cover 11 of the housing and a motor rear end cover 13 close to the rear end cover 11 of the housing. A brushless motor 15 is arranged between the motor front end cover 16 and the motor rear end cover 13. A motor housing 17 is arranged outside the brushless motor 15, and both ends of the motor housing 17 are fixedly installed with the motor front end cover 16 and the motor rear end cover 13 by screws. A motor sealing cover 12 is also arranged between the motor rear end cover 13 and the rear end cover 11 of the housing to seal the matching end of the motor rear end cover 13 and the motor housing 17, so as to avoid the subsequent water flow affecting the operation of the brushless motor 15.

[0064] Even further, a first bearing 14 is arranged in the motor front end cover 16, and a second bearing 112 is arranged in the motor rear end cover 13. Both ends of the motor shaft 113 of the brushless motor 15 are respectively sleeved in the first bearing 14 and the second bearing 112 to maintain the stability of the high-speed rotation of the brushless motor 15.

[0065] Furthermore, a motor housing sleeve 18 is sleeved outside the motor housing 17. The motor housing sleeve 18 wraps the entire driving assembly. A connecting groove is opened at one end of the motor housing sleeve 18 away from the rear end cover 11 of the housing. A boss is arranged on the outer side section of the motor front end cover 16, and the boss is inserted into the connecting groove for positioning. The above-mentioned motor shaft 113 also passes through the boss and extends into the connecting groove. The connecting assembly is arranged in the connecting groove. The connecting assembly includes a motor connecting sleeve 114. The motor connecting sleeve 114 is sleeved on the motor shaft 113, and a bearing spacer 115 is arranged on the outer side of the motor connecting sleeve 114. One end of the bearing spacer 115 abuts against the boss surface of the motor front end cover 16, and the other end abuts against a third bearing 116. The third bearing 116 is also located in the connecting groove and is located at one end of the connecting groove away from the motor front end cover 16, and is used for receiving the installation part at the tail end of the tool body 3 to maintain stability.

[0066] It should be noted in this embodiment that the above-mentioned first bearing 14, second bearing 112 and motor shaft 113 are coaxially arranged to ensure the working stability of the brushless motor 15 and enable the motor shaft 113 to stably transmit power linearly. Furthermore, the motor connecting sleeve 114 and the third bearing 116 are also coaxially arranged with the motor shaft 113 to ensure the stable transmission of the power of the motor shaft 113 to the tool body 3.

[0067] Furthermore, a perforation is opened on one side of the connecting groove away from the motor front end cover 16, and the perforation penetrates through the front end of the motor housing sleeve 18 and is adapted for the insertion and installation of the tool body 3. Specifically, as Figure 2 shown, after the tool body 3 is inserted into the motor housing sleeve 18, it cooperates with the third bearing 116, and the installation part at the tail of the tool body 3 is inserted into the motor connecting sleeve 114 to receive the power output by the motor shaft 113.

[0068] Among them, as Figure 9 shown, a square assembly groove 1401 is provided inside the motor connecting sleeve 114. The two straight surfaces of the square assembly groove 1401 are matched with the straight surfaces provided on the motor shaft 113 and the mounting portion of the tool body 3, so as to realize stable power transmission. Since it is a straight surface match, the motor shaft 113 and the tool body 3 rotate synchronously without slipping.

[0069] Furthermore, as Figure 2 shown, the above-mentioned front cap assembly 2 includes a front cap body 21 connected to the front end of the housing sleeve 110. A button seat 22 is installed on the head of the front cap body 21. One end of the button seat 22 is connected to a button 23, and an elastic member 25 is provided between the button 23 and the front cap body 21, so that the button 23 can rebound and reset after being pressed. Among them, multiple groups of bearings four 24 are provided inside the front cap body 21. The tool body 3 is inserted from the front end of the front cap body 21, passes through the bearings four 24 and the bearing three 116 and enters the motor connecting sleeve 114. The limiting step 31 on the tool body 3 is nested in the front cap body 21 and is limited by the button seat 22. Press the button 23 to push the button seat 22 to release the limit on the limiting step 31, and the tool body 3 can be disassembled from the front end.

[0070] In this embodiment, the specific installation method of the planing tool head is as follows: Manually press the button 23. The button 23 squeezes the elastic member 25 and the button seat 22. The button seat 22 moves outwards. The tail of the tool body 3 passes through the button seat 22 and the front cap body 21, is inserted into the through hole of the motor outer housing 18, and then enters the connecting groove and is inserted into the motor connecting sleeve 114 to realize the transmission connection between the tool body 3 and the motor shaft 113. After the installation is completed, release the button 23. The button and the button seat 22 are reset under the rebound of the elastic member 25. The reset button seat 22 limits the limiting step 31, so that the tool body 3 cannot fall off and can work normally.

[0071] Further, as Figure 2 and Figure 6 shown, a cavity is provided in the middle of the rear end cover 11 of the housing in this embodiment. A channel 1100 communicating with the outside is provided on one side of the cavity, and multiple groups of locking bosses 1101 are provided on the inner side surface of the cavity. The number of the locking bosses 1101 is the same as the number of screw holes on the outer housing insert 19. By providing the locking bosses 1101, the thickness of the screw locking is increased, so that the screw locking is more stable. And a clamping table 1102 is provided on the rear end cover 11 of the housing at the position corresponding to the locking boss 1101. The clamping table 1102 is fixedly connected to the motor sealing cover 12 by being inserted and matched with the motor sealing cover 12.

[0072] Further, as Figure 2 and Figure 7As shown in the figure, a first through hole 1201 is provided in a penetrating manner on one side of the motor seal cover 12 in this embodiment. The first through hole 1201 communicates the inner and outer sides of the motor seal cover 12. And a first sealing ring 118 is provided on the outer shaft surface of the motor seal cover 12 close to one side of the housing rear end cover 11 to seal the gap between the motor seal cover 12 and the housing insert 19. A second sealing ring 119 is integrally provided on the motor seal cover 12 close to the motor rear end cover 13 to seal the gap between the motor seal cover 12 and the motor rear end cover 13.

[0073] Further, as Figure 2 and Figure 8 shown, a second through hole 1301 is also provided in a penetrating manner at one end of the above-mentioned motor rear end cover 13. The second through hole 1301 corresponds to the position of the first through hole 1201 and is interconnected.

[0074] Through the connection of the second through hole 1301, the first through hole 1201 and the channel 1100, the power supply to the internal brushless motor 15 is realized. And through the sealing of the first sealing ring 118 and the second sealing ring 119, the external water supply and the internal power supply do not affect each other.

[0075] Further, as Figure 5 shown, a fourth sealing ring 127 is provided at the mating part of the housing sleeve 110 and the front end of the motor housing sleeve 18. And a third sealing ring 126 is also provided at the mating part of the front cap body 21 and the housing sleeve 110. Through the sealing of the third sealing ring 126 and the fourth sealing ring 127, the joint of the body assembly 1 and the front cap assembly 2 is sealed, reducing the leakage of the cooling flushing water and affecting the operation of the entire tool internal structure.

[0076] Further, as Figure 2 、 Figure 11 and Figure 12 shown, the above-mentioned housing sleeve 110 is provided with an insertion groove 1105 adapted to the head of the housing insert 19 at one end close to the housing insert 19. The head of the housing insert 19 is inserted into the insertion groove 1105, and the cylindrical part of the housing sleeve 110 close to the front cap assembly 2 is adapted to the head of the motor housing sleeve 18.

[0077] Since the planing knife in this embodiment uses a high-speed brushless motor 15 as the power, the rotational speed of the brushless motor 15 is about 50,000 revolutions per minute. The high-speed rotating brushless motor 15 will generate a temperature rise, which is more than 60 degrees per minute. Therefore, the body assembly 1 will get hot, and it is very difficult for the operator to hold it by hand. Therefore, a cooling system needs to be provided inside the body assembly 1 for cooling, so that the planing knife can be effectively held and the damage to the internal structure of the planing knife caused by high temperature can be avoided.

[0078] Therefore, this embodiment is designed in combination with the need for flushing during the operation of the planing knife itself.

[0079] As Figure 2 、Figure 3 and Figure 7 As shown in Figure 7 , through the sealing of the first sealing ring 118 and the second sealing ring 119, a second water inlet channel 121 is formed between the motor sealing cover 12 and the housing insert 19. And an L-shaped first water inlet channel 120 is arranged inside the motor sealing cover 12 itself. One end of the first water inlet channel 120 is communicated with an external water source, and the other end of the first water inlet channel 120 is communicated with the second water inlet channel 121.

[0080] such as Figure 2 、 Figure 3 、 Figure 4 and Figure 10 As shown in Figure 4 , between the outer shaft surface of the cylindrical structure of the motor housing sleeve 18 close to the rear end cover 11 of the housing and the housing insert 19, a third water inlet channel 122 is formed, and the third water inlet channel 122 is communicated with the second water inlet channel 121.

[0081] Furthermore, as Figure 2 、 Figure 4 and Figure 11 As shown in Figure 4 , on the inner side surface of the conical end of the housing sleeve 110, a plurality of groups of fan-shaped water channels 1103 are opened. Inside the straight cylinder end of the housing sleeve 110, a flow channel hole is opened. The plurality of groups of fan-shaped water channels 1103 are symmetrically distributed around the center of the conical end. Between the plurality of groups of fan-shaped water channels 1103 and the outer side surface of the head of the motor housing sleeve 18, a fourth water inlet channel 123 is formed, and the fourth water inlet channel 123 is communicated with the third water inlet channel 122.

[0082] such as Figure 2 、 Figure 5 and Figure 12 As shown in Figure 5 , on the head of the housing sleeve 110, a first annular water channel 125 is opened. On the side wall of the housing sleeve 110 close to one end of the first annular water channel 125, a fifth water inlet channel 124 symmetrically distributed with respect to the axis line of the housing sleeve 110 is also opened. Through the fifth water inlet channel 124, the first annular water channel 125 is communicated with the fourth water inlet channel 123.

[0083] Through the first water inlet channel 120, the second water inlet channel 121, the third water inlet channel 122, the fourth water inlet channel 123, the fifth water inlet channel 124 and the first annular water channel 125, a first cooling and flushing system on the fuselage assembly 1 is constituted, realizing that the external cooling and flushing water enters from the tail of the fuselage assembly 1, flows through the outside of the motor housing sleeve 18, and flows out from the first annular water channel 125, taking away the heat generated by the high-speed rotating brushless motor 15, cooling the entire fuselage assembly 1, so that the operator can hold the planing knife.

[0084] Even further, as Figure 24As shown in the figure, an annular water channel two 210 is provided at one end of the front cap body 21 close to the housing sleeve 110. Symmetrically arranged at the bottom of the annular water channel two 210 are water spraying water channels 217 that penetrate through the front cap body 21. At the head of the front cap body 21, the water spraying water channels 217 are provided with water spraying ports 216. By connecting and introducing the cooling and flushing water flowing out of the annular water channel one 125 into the annular water channel two 210, and then into the water spraying water channels 217, and spraying out from the water spraying ports 216, the high-speed rotating cutter body 3 is further cooled down, reducing the damage of the high-temperature cutter body 3 to the bone, and at the same time flushing the grinding wound surface of the surgical site. In this embodiment, the cooling and flushing water can be distilled water, physiological saline or a special cutting fluid. Among them, the special cutting fluid usually has better lubrication, cooling and flushing effects, and is specially treated to ensure sterility.

[0085] Among them, the annular water channel two 210, the water spraying water channels 217 and the water spraying ports 216 constitute the second cooling and flushing system. Through the combination of the first cooling and flushing system and the second cooling and flushing system, the entire planing cutter structure is cooled down, and at the same time the surgical site is flushed. And through the setting of the annular water channel two 210 on the front cap body 21, when installing the front cap assembly 2, precise alignment is not required, and the water channel connection of the cooling and flushing system can also be realized, so that the installation and disassembly of the front cap assembly 2 and the water channel connection of the cooling and flushing system do not interfere with each other.

[0086] Furthermore, in order to enable the planing cutter head to be installed from the head of the planing cutter (i.e., the side of the front cap assembly 2), facilitating the replacement of the planing cutter head, an adapted front cap assembly 2 is provided in this embodiment.

[0087] As Figures 15 - 24 shown, it includes the above-mentioned front cap body 21, button seat 22, button 23, bearing four 24 and elastic member 25, and the more specific structure is as follows:

[0088] Among them, an installation groove 211 is provided through the head of the front cap body 21 (i.e., the side away from the fuselage assembly 1). A button seat 22 is slidably arranged in the installation groove 211. A pressing groove 212 communicating with the installation groove 211 is provided on one side of the head of the front cap body 21. A button 23 is arranged in the pressing groove 212. And a first mating circular groove 213, a second mating circular groove 214 and a cutter head installation hole 215 are sequentially arranged inside the front cap body 21. The first mating circular groove 213 is arranged close to the housing sleeve 110 side, and the first mating circular groove 213 and the second mating circular groove 214 are adapted to the motor housing sleeve 18.

[0089] As Figure 21As shown, the button base 22 further includes a moving body 222. At one end of the moving body 222, there is a button engaging portion 221, and at the other end, there is a connecting portion 224. The button base 22 is connected to the button 23 through the connecting portion 224. Among them, an assembly hole 223 is also provided in the middle of the moving body 222. The diameter of the assembly hole 223 is larger than the outer diameter of the limiting step 31 on the tool body 3, which facilitates the insertion of the limiting step 31 on the tool body 3 during installation.

[0090] As Figure 22 shown, the button 23 includes a pressing body 231. Inside the pressing body 231, there is a connecting body 232. A connecting hole 233 is provided in the center of the connecting body 232. The connecting hole 233 is adapted to the connecting portion 224 of the button base 22 to realize the connection between the button 23 and the button base 22. And a ring groove 234 is also provided on the inner side surface of the pressing body 231. The above elastic member 25 is arranged in the ring groove 234 to realize elastic recovery.

[0091] It should be further noted that the elastic member 25 in this application is not limited to a specific structure, and can be a spring or an elastic body with elasticity, etc.

[0092] The more detailed usage method of this embodiment is as follows:

[0093] By manually pressing the button 23, the button 23 squeezes the elastic member 25 and the button base 22, and the button base 22 moves outward, so that the assembly hole 223 is aligned with the tool head installation hole 215. The tail of the tool body 3 passes through the button base 22 and the front cap body 21, is inserted into the through hole of the motor housing sleeve 18, and then enters the connecting groove and is inserted into the motor connecting sleeve 114. Along the way, it is limited by the bearing four 24 and the bearing three 116 to realize the transmission connection between the tool body 3 and the motor shaft 113. After the installation is completed, release the button 23, and the button and the button base 22 reset under the elastic rebound of the elastic member 25. The assembly hole 223 in the reset button base 22 is misaligned to realize the limitation of the limiting step 31, so that the tool body 3 cannot fall off. Start the brushless motor 15 to drive the tool body 3 to rotate and work normally.

[0094] Embodiment Three

[0095] Since the planing tool head is relatively long, when the installation portion at the tail of the tool body 3 is inserted into the motor connecting sleeve 114, the entire tool body 3 is likely to be deflected due to the clearance fit relationship. When deflection occurs, the step surface of the limiting step 31 on the tool body 3 is likely to abut against the bottom surface of the corresponding moving body 222 or the bearing four 24, resulting in the phenomenon of tool jamming.

[0096] Therefore, in this embodiment, a gap is reserved between the limiting step 31 and the bottom surface of the bearing four 24 or the moving body 222 to avoid the deflection of the too long tool body 3 after installation, so that the tool body 3 and the motor shaft 113 are not coaxial, and further the phenomenon of tool body 3 rotation jamming is generated;

[0097] Furthermore, the above gap is set to be 0.5 mm or less.

[0098] Example 4

[0099] As Figure 11 、 Figure 12 shown, in order to make the flow of the fan-shaped water channel 1103 smoother, water inlets 1104 are provided at the ends of some or all of the fan-shaped water channels 1103, increasing the water inlet speed of the third water inlet channel 122, making the flow of the entire first cooling and flushing system faster, improving the heat exchange efficiency, and enhancing the cooling effect.

[0100] Example 5

[0101] Since the motor housing sleeve 18 and the housing insert 19 need to form the third water inlet channel 122, the motor housing sleeve 18 cannot effectively support the housing insert 19, so the housing insert 19 is likely to be deformed under external impact, blocking the third water inlet channel 122.

[0102] In view of this, as Figure 13 and Figure 14 shown, in this embodiment, a plurality of support ribs 181 distributed around the axis of the motor housing sleeve 18 are provided on the outer wall surface of the cylindrical portion of the motor housing sleeve 18 to support the inner side surface of the housing insert 19.

[0103] The outer side surface of the support rib 181 can be in contact with the inner side surface of the housing insert 19 for direct support. Further, the outer side surface of the support rib 181 can be not in contact with the inner side surface of the housing insert 19, and a flow channel is formed between adjacent support ribs 181. Even if the housing insert 19 is deformed under external impact, the flow channel formed between adjacent support ribs 181 cannot be blocked, so that the third water inlet channel 122 remains unobstructed.

[0104] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, specific orientation structure and operation. Therefore, it cannot be understood as a limitation to the present invention. In addition, "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0105] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0106] The above has described in detail an embodiment of the present invention, but the content described is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A disposable sterile planing tool head, characterized in that: include: Blade body (3), A limiting step (31), wherein the limiting step (31) is arranged on the knife body (3); The knife body (3) is installed in a limited position by means of the limited step (31).

2. A planing knife, characterized in that: The invention comprises a body component (1) and a front cap component (2), wherein the body component (1) and the front cap component (2) are cooperatively mounted with the disposable sterile shaver head as claimed in claim 1, The front cap assembly (2) is mounted on one end of the fuselage assembly (1); The front cap assembly (2) comprises a front cap body (21), one end of the front cap body (21) is slidably mounted with a button seat (22), one end of the button seat (22) passes through the front cap body (21) and is connected with a button (23), an elastic member (25) is arranged between the button (23) and the front cap body (21), and a bearing four (24) is arranged inside the front cap body (21); The disposable sterile shaver head is installed into the body assembly (1) via a side of the front cap body (21) on which the button seat (22) is installed, and is limited in position by the button seat (22).

3. The planing tool according to claim 2, characterized in that: The body assembly (1) comprises a casing insert (19), one end of which is mounted with a casing rear end cover (11), the other end of which is nested with a casing sleeve (110), a rubber sleeve (111) being sleeved on the casing sleeve (110), the casing sleeve (110) being connected to the front cap assembly (2), a driving assembly and a connecting assembly being arranged inside the casing insert (19), the connecting assembly being used to connect the disposable sterile shaver head and the driving assembly.

4. The planing tool according to claim 3, characterized in that: The drive assembly comprises a motor front end cover (16) and a motor rear end cover (13), a brushless motor (15) is arranged between the motor front end cover (16) and the motor rear end cover (13), a motor housing (17) is arranged on the outside of the brushless motor (15), and a motor shaft (113) is arranged in the brushless motor (15).

5. The planing tool according to claim 4, characterized in that The motor housing (17) is sleeved with a motor housing cover (18) on its outer side. The motor housing cover (18) is inserted into the interior of the housing cover (110) and is cooperatively connected with the front cap body (21).

6. The planing tool according to claim 4, characterized in that The connection assembly comprises a motor connection sleeve (114), the motor connection sleeve (114) is sleeved on the motor shaft (113), a bearing spacer (115) is arranged on the outside of the motor connection sleeve (114), and the other end of the bearing spacer (115) is abutted against a bearing three (116).

7. The planing tool according to claim 5, characterized in that The fuselage assembly (1) is provided with a first cooling system, the first cooling system comprising a water inlet channel 1 (120) provided inside the motor sealing cover (12), a water inlet channel 2 (121) formed between the motor sealing cover (12) and the casing insert (19), a water inlet channel 3 (122) formed between the motor outer shell (18) and the casing insert (19), a water inlet channel 4 (123) formed between the casing shell (110) and the motor outer shell (18), a water inlet channel 5 (124) provided at the head of the casing shell (110), and a ring water channel 1 (125) provided at the head of the casing shell (110); The water inlet channel 1 (120), the water inlet channel 2 (121), the water inlet channel 3 (122), the water inlet channel 4 (123), the water inlet channel 5 (124) and the annular water channel 1 (125) are connected in sequence.

8. The planing tool according to claim 2, characterized in that: The front cap assembly (2) is provided with a second cooling system, the second cooling system comprising a second annular water channel (210) opened at one end of the front cap body (21), a water spraying water path (217) opened inside the front cap body (21), and a water spraying port (216) connected to the water spraying water path (217), wherein the other end of the water spraying water path (217) is connected to the second annular water channel (210).

9. The planing tool according to claim 2, characterized in that: A cutter head mounting hole (215) is provided inside the front cap body (21); the button seat (22) comprises a movable body (222); and a mounting hole (223) is provided in the middle of the movable body (222); When the disposable sterile shaver head is installed, the button (23) is pressed to make the assembly hole (223) of the movable body (222) correspond to the position of the head installation hole (215).

10. The planing tool according to claim 9, characterized in that A clearance is provided between the step surface of the limiting step (31) of the disposable sterile planing tool head and the bearing four (24) or the moving body (222); The gap is set to 0.5 mm or less.

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