Disposable sterile shaving heads and shaving cartridges

Abstract

The application discloses a disposable sterile planing cutter head and a planing cutter, relates to the technical field of medical devices, and comprises a cutter body, a limiting step, the limiting step is arranged on the cutter body, the cutter body is limitedly installed through the limiting step, the planing cutter comprises a body assembly and a front cap assembly, and the body assembly and the front cap assembly are installed in cooperation with the disposable sterile planing cutter head, the front cap assembly comprises a front cap body, a button seat is slidably installed at one end of the front cap body, a button is connected to one end of the button seat and penetrates through the front cap body, an elastic piece is arranged between the button and the front cap body, and a bearing four is arranged in the front cap body. Through the above structure, the planing cutter head can be directly installed and dismounted from the front end of the planing cutter, the front end part of the planing cutter does not need to be dismounted, the used planing cutter head cannot pollute other parts, and installation time is further saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a disposable sterile shaving cutter head and a shaving cutter. BACKGROUND

[0002] In the field of medical surgery, shaving cutters are an important surgical instrument commonly used in orthopedic surgery to polish the edges of bones, making the bone edges smooth and flat, thereby facilitating subsequent surgical operations or the fixation of implants. Traditional shaving cutter designs typically include 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 shortcomings.

[0003] Firstly, the installation and removal process of the traditional shaving cutter head is relatively cumbersome, requiring the doctor to first disassemble the front end component of the shaving cutter before installing and removing 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 precision and safety of the surgery.

[0004] Secondly, since the traditional shaving cutter head needs to be frequently contacted with the front end component of the shaving cutter during installation and removal, this increases the risk of contamination of other components by the used shaving cutter head. In a medical environment, any form of contamination can 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

[0005] The purpose of the present application is to provide a disposable sterile shaving cutter head and a shaving cutter that can be directly installed and removed from the front end of the shaving cutter without the need to disassemble the front end component of the shaving cutter, solving the problem of long installation and removal time of the shaving cutter head, increasing the time cost of the surgery, and the risk of contamination of other components by the used shaving cutter head.

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

[0007] The disposable sterile shaving cutter head comprises:

[0008] a cutter body,

[0009] a limiting step provided on the cutter body;

[0010] The cutter body is installed by limiting the limiting step.

[0011] As a further solution of the present application, the shaving cutter comprises a body assembly and a front cap assembly, and the body assembly and the front cap assembly are installed with the above-mentioned disposable sterile shaving cutter head,

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

[0013] The front cap assembly comprises a front cap body, a button seat is slidably installed at one end of the front cap body, a button is connected to the front cap body through the button seat at one end, an elastic member is arranged between the button and the front cap body, and a bearing four is arranged inside the front cap body.

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

[0015] As a further scheme of the present application, the body assembly comprises a shell insert, a shell rear end cover is installed at one end of the shell insert, a shell sleeve is nested at the other end of the shell insert, a rubber sleeve is tied on the shell sleeve, the shell sleeve is connected with the front cap assembly, and a driving assembly and a connecting assembly are arranged inside the shell insert.

[0016] As a further scheme of the present application, the driving assembly comprises a motor front end cover and a motor rear end cover, a brushless motor is arranged between the motor front end cover and the motor rear end cover, a motor shell is arranged outside the brushless motor, and a motor shaft is arranged in the brushless motor.

[0017] As a further scheme of the present application, a motor shell sleeve is sleeved outside the motor shell, the motor shell sleeve is arranged inside the shell sleeve, and the motor shell sleeve is connected with the front cap body.

[0018] As a further scheme of the present application, the connecting assembly comprises a motor connecting sleeve, the motor connecting sleeve is sleeved on the motor shaft, a bearing spacer is arranged outside the motor connecting sleeve, and a bearing three is abutted at the other end of the bearing spacer.

[0019] As a further scheme of the present application, a first cooling system is arranged in the body assembly, the first cooling system comprises a first water inlet channel arranged inside a motor sealing cover, a second water inlet channel formed between the motor sealing cover and the shell insert, a third water inlet channel formed between the motor shell sleeve and the shell insert, a fourth water inlet channel formed between the shell sleeve and the motor shell sleeve, a fifth water inlet channel formed in the head portion of the shell sleeve, and an annular water channel one formed in the head portion of the shell sleeve.

[0020] The first water inlet channel, the second water inlet channel, the third water inlet channel, the fourth water inlet channel, the fifth water inlet channel and the annular water channel one are in communication with each other.

[0021] As a further scheme of the present application: the front cap assembly is provided with a second cooling system, the second cooling system comprises a ring-shaped water channel two opened at one end of the front cap body, a water spraying channel opened in the interior of the front cap body and a water spraying port communicated with the water spraying channel, wherein the other end of the water spraying channel is communicated with the ring-shaped water channel two.

[0022] As a further scheme of the present application: the front cap body is provided with a cutter head mounting hole, the button seat comprises a moving main body, and the moving main body is provided with an assembly hole in the middle part thereof.

[0023] When the disposable sterile shaving cutter head is mounted, the button is pressed, and the assembly hole of the moving main body is positioned to correspond to the cutter head mounting hole.

[0024] As a further scheme of the present application: the step surface of the limiting step of the disposable sterile shaving cutter head is provided with a gap between the bearing four and the moving main body.

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

[0026] The present application has the following beneficial effects:

[0027] The present application is provided with a front cap assembly with a pressing mounting structure. By manually pressing the button, the button extrudes the elastic member and the button seat, the button seat moves outward, the cutter body tail part passes through the button seat and the front cap body, and is mounted into the fuselage assembly. The shaving cutter head is directly mounted and dismounted from the front end, without dismounting the front end part of the shaving cutter, further saving the mounting time, reducing the operation time cost, avoiding the pollution of the used shaving cutter head to other parts, reducing the pollution risk, and stably limiting the shaving cutter head after being mounted from the front end through the limiting step, and normally working.

[0028] The present application further comprises a first cooling system and a second cooling system, so that the combination thereof cools and lowers the temperature of the entire shaving cutter structure. Through the setting of the ring-shaped water channel two on the front cap body, when the front cap assembly is mounted, the cooling system water channel is communicated without accurate positioning, so that the front cap assembly mounting and dismounting and the cooling system water channel communication do not interfere with each other. BRIEF DESCRIPTION OF DRAWINGS

[0029] The present application will be further described below in combination with the drawings.

[0030] Figure 1 is a schematic view of the overall structure of the shaving cutter of the present application;

[0031] Figure 2 is a schematic view of the overall cross-sectional structure of the shaving cutter of the present application;

[0032] Figure 3 is Figure 2 is an enlarged structure schematic view of the A area in the middle part.

[0033] Figure 4 is Figure 2 B region amplification structure schematic diagram in the middle;

[0034] Figure 5 is Figure 2 C region amplification structure schematic diagram in the middle;

[0035] Figure 6 is the rear end cover structure schematic diagram of the invention;

[0036] Figure 7 is the motor sealing cover structure schematic diagram of the invention;

[0037] Figure 8 is the rear end cover and bearing connection structure schematic diagram of the invention;

[0038] Figure 9 is the motor connecting sleeve structure schematic diagram of the invention;

[0039] Figure 10 is the motor shell sleeve structure schematic diagram of the invention in the second embodiment;

[0040] Figure 11 is the motor shell sleeve structure schematic diagram of the invention;

[0041] Figure 12 is the motor shell sleeve structure schematic diagram of the invention;

[0042] Figure 13 is the motor shell sleeve structure schematic diagram of the invention in the fifth embodiment;

[0043] Figure 14 is the motor shell sleeve and shell insert cooperation structure schematic diagram of the invention in the fifth embodiment;

[0044] Figure 15 is the front cap assembly structure schematic diagram of the invention Figure 1 ;

[0045] Figure 16 is the front cap assembly structure schematic diagram of the invention Figure 2 ;

[0046] Figure 17 is the front cap assembly and planing cutter head cooperation section structure schematic diagram of the invention;

[0047] Figure 18 is Figure 17 D region amplification structure schematic diagram in the middle;

[0048] Figure 19 is the front cap body section structure schematic diagram of the invention;

[0049] Figure 20Is the water jet position diagram of the present application;

[0050] Figure 21 Is the button seat structure diagram of the present application;

[0051] Figure 22 Is the button structure diagram of the present application;

[0052] Figure 23 Is the button and button seat cooperation structure diagram of the present application;

[0053] Figure 24 Is the water jet waterway structure diagram of the present application;

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

[0055] In the figure: 1, machine body assembly; 11, machine shell rear end cover; 1100, channel; 1101, locking boss; 1102, clamping table; 12, motor sealing cover; 1201, through hole one; 13, motor rear end cover; 1301, through hole two; 14, bearing one; 15, brushless motor; 16, motor front end cover; 17, motor shell; 18, motor shell sleeve; 181, support rib; 19, machine shell insert; 110, machine shell sleeve; 1103, fan-shaped water channel; 1104, water inlet; 1105, embedded groove; 111, rubber sleeve; 112, bearing two; 113, motor shaft; 114, motor connecting sleeve; 1401, square assembly groove; 115, bearing spacer; 116, bearing three; 118, sealing ring one; 119, sealing ring two; 120, water inlet channel one; 121, water inlet channel two; 122, water inlet channel three; 123, water inlet channel four; 124, water inlet channel five; 125, annular water channel one; 126, sealing ring three; 127, sealing ring four; 2, front cap assembly; 21, front cap body; 210, annular water channel two; 211, mounting groove; 212, pressing groove; 213, first matching circular groove; 214, second matching circular groove; 215, cutter head mounting hole; 216, water jet; 217, water jet waterway; 22, button seat; 221, button cooperation part; 222, moving main body; 223, assembly hole; 224, connecting part; 23, button; 231, pressing main body; 232, connecting body; 233, connecting hole; 234, ring groove; 24, bearing four; 25, elastic piece; 3, cutter body; 31, limiting step. DETAILED DESCRIPTION

[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0057] Example 1

[0058] like Figure 25 As shown, this embodiment provides a disposable sterile planing tool head, which includes a tool body 3 and a limiting step 31 arranged on the tool body 3, wherein the tool body 3 includes a working front end and an installation tail, and the position of the limiting step 31 on the tool body 3 can be set according to different installation requirements. The limiting step 31 cooperates with the installation tail of the tool body 3 to be installed in combination with other parts of the planing tool to form a complete planing tool for performing a disposable bone edge grinding operation.

[0059] It should be noted that during the bone edge grinding operation, the above-mentioned planing head is a disposable sterile replacement structure, and medical waste needs to be collected after use and subsequently disposed of harmlessly; and compared with the traditional disposable planing head, which requires the disassembly of the front end component of the planing knife and then installation and removal, the planing head of this embodiment can be directly installed and disassembled from the front end of the planing knife, without the need to disassemble the front end component of the planing knife, further saving installation time and avoiding contamination of other components by the used planing head, and the limiting step 31 allows the planing head to be stably limited after installation from the front end and work normally.

[0060] Example 2

[0061] like Figures 1-25 As shown, this embodiment provides a planer, comprising a body assembly 1, a front cap assembly 2, and the disposable sterile planer head of the above-mentioned embodiment 1 installed in the body assembly 1, and the planer head of embodiment 1 is assembled in conjunction with the front cap assembly 2. The planer head can be installed and removed from the front end of the front cap assembly 2, making the replacement of the disposable sterile planer head more convenient, and at the same time, the axial movement of the cutter body 3 can be restricted after assembly.

[0062] like Figures 1-5 As shown, the above-mentioned fuselage assembly 1 includes a casing insert 19, a casing rear end cover 11 is installed at the tail of the casing insert 19, a casing sleeve 110 is nested at the front end of the casing insert 19, and a rubber sleeve 111 is sleeved on the casing sleeve 110, wherein the tail of the casing insert 19 is cylindrical, and the casing rear end cover 11 is inserted into the circular cavity inside the casing insert 19 and locked by screws, wherein the threaded hole opened on the axial surface of the insertion part of the casing rear end cover 11 is a reverse thread, so that the screw is reversed and locked to avoid accidental disassembly.

[0063] Further, the driving assembly and the connecting assembly are arranged in the internal circular cavity of the shell insert 19. The driving assembly comprises a motor front end cover 16 away from the rear end cover 11 of the shell and a motor rear end cover 13 close to the rear end cover 11 of the shell. A brushless motor 15 is arranged between the motor front end cover 16 and the motor rear end cover 13. A motor shell 17 is arranged outside the brushless motor 15. The two ends of the motor shell 17 are respectively locked and installed with the motor front end cover 16 and the motor rear end cover 13 through screws. A motor sealing cover 12 is further arranged between the motor rear end cover 13 and the rear end cover 11 of the shell to seal the cooperation end of the motor rear end cover 13 and the motor shell 17, avoiding the subsequent water from affecting the operation of the brushless motor 15.

[0064] Further, the bearing two 112 is arranged in the motor front end cover 16, and the bearing one 14 is arranged in the motor rear end cover 13. The two ends of the motor shaft 113 of the brushless motor 15 are respectively sleeved in the bearing one 14 and the bearing two 112 to maintain the stability of high-speed rotation of the brushless motor 15.

[0065] Further, the motor shell sleeve 18 is sleeved outside the motor shell 17 to wrap the entire driving assembly. A connecting groove is formed at one end of the motor shell sleeve 18 away from the rear end cover 11 of the shell. The outer side section of the motor front end cover 16 is provided with a boss which is inserted into the connecting groove for limiting. The above-mentioned motor shaft 113 also penetrates the boss and extends into the connecting groove. The connecting assembly is arranged in the connecting groove. The connecting assembly comprises a motor connecting sleeve 114 which is sleeved on the motor shaft 113. The bearing spacer 115 is arranged outside 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 the bearing three 116 which is also located in the connecting groove and away from the motor front end cover 16. The bearing three 116 is used for receiving the mounting portion at the tail end of the blade body 3 to maintain stability.

[0066] It is to be noted that the bearing one 14, the bearing two 112 and the motor shaft 113 are coaxially arranged to ensure the stability of the operation of the brushless motor 15 and enable the motor shaft 113 to stably transmit power in a straight line. Further, the motor connecting sleeve 114 and the bearing three 116 are coaxially arranged with the motor shaft 113 to ensure that the motor shaft 113 stably transmits power to the blade body 3.

[0067] Further, a perforation is formed at the side of the connecting groove away from the motor front end cover 16. The perforation penetrates the front end of the motor shell sleeve 18 to adapt to the insertion and installation of the blade body 3. As shown in Figure 2 After the blade body 3 is inserted into the motor shell sleeve 18, the blade body 3 cooperates with the bearing three 116. The mounting portion at the tail end of the blade body 3 is inserted into the motor connecting sleeve 114 to receive the power output by the motor shaft 113.

[0068] As shown in Figure 9 The inner side of the motor connecting sleeve 114 is provided with a square assembly groove 1401, and the two straight faces of the square assembly groove 1401 are matched with the straight faces provided in the motor shaft 113 and the cutter body 3 mounting part to realize stable transmission of power. Since it is a straight face matching, the motor shaft 113 and the cutter body 3 rotate synchronously and do not slip.

[0069] Further, as shown in Figure 2 The front cap assembly 2 includes a front cap body 21 connected to the front end of the shell sleeve 110. A button seat 22 is mounted on the head of the front cap body 21. One end of the button seat 22 is connected to a button 23. An elastic member 25 is arranged between the button 23 and the front cap body 21, so that the button 23 can be reset after being pressed. A plurality of bearings four 24 are arranged inside the front cap body 21. The cutter body 3 is inserted from the front end of the front cap body 21, passes through the bearings four 24 and bearings three 116, and enters the motor connecting sleeve 114. The limiting step 31 on the cutter body 3 is nested in the front cap body 21 and limited by the button seat 22. Pressing the button 23 pushes the button seat 22 to release the limiting of the limiting step 31, so that the cutter body 3 can be disassembled from the front end.

[0070] In this embodiment, the specific installation method of the planing cutter head is as follows: manually pressing the button 23, the button 23 extruding the elastic member 25 and the button seat 22, the button seat 22 moving outward, the cutter body 3 tail passing through the button seat 22 and the front cap body 21, being inserted into the perforation of the motor shell sleeve 18, and then entering the connecting groove and being inserted into the motor connecting sleeve 114 to realize the transmission connection between the cutter body 3 and the motor shaft 113. After installation is completed, the button 23 is released, the button and the button seat 22 are reset under the elastic member 25, the reset button seat 22 limits the limiting step 31, so that the cutter body 3 cannot be detached and works normally.

[0071] Further, as shown in Figure 2 and Figure 6 The middle part of the shell rear end cover 11 in this embodiment is provided with a cavity. A channel 1100 communicating with the outside is arranged on one side of the cavity. A plurality of locking bosses 1101 are arranged on the inner side of the cavity. The number of the locking bosses 1101 is consistent with the screw holes on the outer shell insert 19. The locking bosses 1101 increase the thickness of the screw locking, so that the screw locking is more stable. A clamping table 1102 is arranged on the shell rear end cover 11 corresponding to the position of the locking boss 1101. The clamping table 1102 is inserted and matched with the motor sealing cover 12 to fix the motor sealing cover 12.

[0072] Further, as shown in Figure 2 and Figure 7As shown, the motor sealing cover 12 in the embodiment has a through hole 1201 on one side, which connects the inside and outside of the motor sealing cover 12, and the motor sealing cover 12 has a sealing ring 118 on the outer shaft surface near the rear end cover 11 of the shell, which seals the gap between the motor sealing cover 12 and the shell insert 19. The motor sealing cover 12 has a sealing ring 119 near the rear end cover 13 of the motor, which seals the gap between the motor sealing cover 12 and the rear end cover 13 of the motor.

[0073] Further, as shown in Figure 2 and Figure 8 , the rear end cover 13 of the motor also has a through hole 1301 on one end, which corresponds to the through hole 1201 and is connected to each other.

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

[0075] Further, as shown in Figure 5 , the shell sleeve 110 and the motor housing sleeve 18 are provided with a sealing ring 127 at the front end of the shell sleeve 110 and the motor housing sleeve 18, and the sealing ring 126 is provided at the joint of the front cap body 21 and the shell sleeve 110. Through the sealing of the sealing ring 126 and the sealing ring 127, the joint of the machine body assembly 1 and the front cap assembly 2 is sealed, reducing the leakage of the cooling and flushing water affecting the overall structure of the tool.

[0076] Further, as shown in Figure 2 , Figure 11 and Figure 12 , the shell sleeve 110 has an embedded groove 1105 at one end near the shell insert 19, which is adapted to the head of the shell insert 19, and the head of the shell insert 19 is inserted into the embedded groove 1105, and the cylindrical part near the front cap assembly 2 of the shell sleeve 110 is adapted to the head of the motor housing sleeve 18.

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

[0078] Therefore, the embodiment combines the need for flushing characteristics of the surgical planing itself.

[0079] As shown in Figure 2 ,Figure 3 and Figure 7 As shown, through the sealing of sealing ring 118 and sealing ring 2 119, a water inlet channel 2 121 is formed between the motor sealing cover 12 and the casing insert 19, and an L-shaped water inlet channel 120 is provided inside the motor sealing cover 12 itself, one end of the water inlet channel 120 is connected to the external water source, and the other end of the water inlet channel 120 is connected to the water inlet channel 2 121.

[0080] like Figure 2 、 Figure 3 、 Figure 4 and Figure 10 As shown, a water inlet channel 3 122 is formed between the outer axial surface of the cylindrical structure of the motor housing sleeve 18 close to the rear end cover 11 of the casing and the casing insert 19 of this embodiment, and the water inlet channel 3 122 is connected to the water inlet channel 2 121 .

[0081] Further, if Figure 2 、 Figure 4 and Figure 11 As shown, multiple groups of fan-shaped water channels 1103 are opened on the inner side surface of the conical end of the casing sleeve 110, and flow channel holes are opened inside the straight end of the casing sleeve 110. The multiple groups of fan-shaped water channels 1103 are symmetrically distributed around the center of the conical end. Water inlet channel four 123 is formed between the multiple groups of fan-shaped water channels 1103 and the flow channel holes and the outer side surface of the head of the motor housing sleeve 18, and the water inlet channel four 123 is connected to the water inlet channel three 122.

[0082] like Figure 2 、 Figure 5 and Figure 12 As shown, an annular water channel 125 is provided at the head of the casing 110, and a water inlet channel 5 124 is provided on the side wall of the casing 110 near the annular water channel 125 and is symmetrically distributed relative to the axis of the casing 110. The annular water channel 125 is connected to the water inlet channel 4 123 through the water inlet channel 5 124.

[0083] The first cooling and flushing system on the fuselage assembly 1 is formed by water inlet channel 120, water inlet channel 2 121, water inlet channel 3 122, water inlet channel 4 123, water inlet channel 5 124 and annular water channel 1 125, so that external cooling and flushing water enters from the tail of the fuselage assembly 1, flows through the outside of the motor outer shell 18, and flows out from the annular water channel 1 125, taking away the heat generated by the high-speed rotating brushless motor 15, cooling the entire fuselage assembly 1, and enabling the operator to hold the planer knife.

[0084] Furthermore, if Figure 24As shown, an annular water channel 210 is provided at one end of the front cap body 21 near the casing 110, and a water spray channel 217 that passes through the front cap body 21 is symmetrically provided at the bottom of the annular water channel 210. The water spray channel 217 is provided with a water spray port 216 at the head of the front cap body 21. The cooling flushing water flowing out of the annular water channel 1 125 is connected to the annular water channel 2 210 and then enters the water spray channel 217 and is sprayed out from the water spray port 216, thereby further cooling the high-speed rotating blade 3 and reducing the damage to the bone caused by the high-temperature blade 3. At the same time, the polished wound surface of the surgical site is flushed. In this embodiment, the cooling flushing water can be distilled water, physiological saline or special cutting fluid, among which the special cutting fluid usually has better lubrication, cooling and flushing effects, and is specially treated to ensure sterility.

[0085] The annular water channel 210, the water spray channel 217 and the water spray port 216 constitute a second cooling and flushing system. Through the combination of the first cooling and flushing system, the entire planer structure is cooled and the surgical site is flushed at the same time. In addition, by setting the annular water channel 210 on the front cap body 21, when installing the front cap assembly 2, there is no need for precise alignment, and the water channel connection of the cooling and flushing system can be achieved, 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 tool head to be installed from the head of the planing tool (ie, the side of the front cap assembly 2) and facilitate the replacement of the planing tool head, the present embodiment provides an adaptive front cap assembly 2.

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

[0088] A mounting groove 211 is provided at the head of the front cap body 21 (i.e., the side away from the fuselage assembly 1), and a button seat 22 is slidably provided in the mounting groove 211. A pressing groove 212 connected to the mounting groove 211 is provided on one side of the head of the front cap body 21, and a button 23 is provided in the pressing groove 212. A first matching circular groove 213, a second matching circular groove 214 and a cutter head mounting hole 215 are sequentially provided inside the front cap body 21, wherein the first matching circular groove 213 is provided close to the side of the casing cover 110, and the first matching circular groove 213 and the second matching circular groove 214 are adapted to the motor casing cover 18.

[0089] like Figure 21As shown, the button seat 22 further comprises a moving body 222, a button matching part 221 is connected to one end of the moving body 222, and a connecting part 224 is connected to the other end, the button seat 22 is connected with the button 23 through the connecting part 224, wherein a fitting hole 223 is further provided in the middle of the moving body 222, the fitting hole 223 has a diameter larger than the outer diameter of the limiting step 31 on the cutter body 3, facilitating the penetration of the limiting step 31 on the cutter body 3 during installation.

[0090] As shown, Figure 22 The button 23 comprises a pressing body 231, a connecting body 232 is arranged on the inner side of the pressing body 231, a connecting hole 233 is provided in the center of the connecting body 232, the connecting hole 233 is matched with the connecting part 224 of the button seat 22, realizing the connection between the button 23 and the button seat 22, and a ring groove 234 is further provided on the inner side of the pressing body 231, the elastic member 25 is arranged in the ring groove 234, realizing the elastic recovery.

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

[0092] Further, the more detailed use method of the present embodiment is as follows:

[0093] By manually pressing the button 23, the button 23 extrudes the elastic member 25 and the button seat 22, the button seat 22 moves outward, the fitting hole 223 is aligned with the cutter head mounting hole 215, the tail part of the cutter body 3 is inserted into the perforation of the motor shell sleeve 18, and then into the connecting groove and the motor connecting sleeve 114, passing through the bearing four 24 and the bearing three 116 for limiting during the way, realizing the transmission connection between the cutter body 3 and the motor shaft 113, after the installation is completed, the button 23 is released, the button and the button seat 22 are reset under the elastic recovery of the elastic member 25, the fitting hole 223 in the reset button seat 22 is misaligned, realizing the limiting of the limiting step 31, the cutter body 3 cannot be detached, the brushless motor 15 is started to drive the cutter body 3 to rotate, and the normal work is realized.

[0094] Embodiment three

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

[0096] Therefore, the present embodiment reserves a gap between the limiting step 31 and the bottom surface of the bearing four 24 or the moving body 222, avoiding the deflection of the too long cutter body 3 after installation, so that the cutter body 3 is not coaxial with the motor shaft 113, and the phenomenon of tool jamming during rotation of the cutter body 3 is avoided.

[0097] Further, the above-mentioned gap is set to 0.5 mm or less.

[0098] Embodiment Four

[0099] As shown in Figure 11 , Figure 12 , in order to make the fan-shaped waterway 1103 flow more smoothly, water inlet 1104 is set at the end of part or all of the fan-shaped waterway 1103, which increases the water inlet speed of the third water inlet channel 122, makes the whole first cooling and flushing system flow more quickly, improves the heat exchange efficiency, and strengthens the cooling effect.

[0100] Embodiment Five

[0101] Because the water inlet channel three 122 needs to be formed between the motor shell sleeve 18 and the shell insert 19, the motor shell sleeve 18 cannot effectively support the shell insert 19, so that the shell insert 19 is easily deformed under external force impact, and the water inlet channel three 122 is blocked.

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

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

[0104] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, and a particular orientation configuration and operation, therefore, cannot be understood as a limitation on the present application. In addition, "first", "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 technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0105] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" and the like should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0106] The above describes one embodiment of the present application in detail, but the content described is only a preferred embodiment of the present application, and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made within the scope of the present application should still be attributed to the patent coverage of the present application.

Claims

1. A planing tool, characterized in that The machine body assembly (1) and the front cap assembly (2) are matched with a disposable sterile planing cutter head, the disposable sterile planing cutter head comprises a cutter body (3), A limiting step (31) is arranged on the cutter body (3); The cutter body (3) is limitedly installed through the limiting step (31); The front cap assembly (2) is installed at one end of the machine body assembly (1); The front cap assembly (2) comprises a front cap body (21), a button seat (22) is slidably installed at one end of the front cap body (21), a button (23) is connected at one end of the button seat (22) through the front cap body (21), an elastic element (25) is arranged between the button (23) and the front cap body (21), and a bearing four (24) is arranged in the front cap body (21). The button seat (22) further comprises a moving main body (222), a button matching part (221) is connected at one end of the moving main body (222), a connecting part (224) is connected at the other end, the button seat (22) is connected with the button (23) through the connecting part (224), and an assembly hole (223) is further formed in the middle of the moving main body (222), the diameter of the assembly hole (223) is greater than the outer diameter of the limiting step (31) on the cutter body (3), so that the limiting step (31) on the cutter body (3) is conveniently penetrated during installation. The disposable sterile planing cutter head is installed into the machine body assembly (1) from the side where the button seat (22) is installed on the front cap body (21), and is limited by the button seat (22).

2. The planing tool according to claim 1, characterized in that The machine body assembly (1) comprises a machine shell insert (19), a machine shell rear end cover (11) is installed at one end of the machine shell insert (19), a machine shell sleeve (110) is nested at the other end of the machine shell insert (19), a rubber sleeve (111) is sleeved on the machine shell sleeve (110), the machine shell sleeve (110) is connected with the front cap assembly (2), a driving assembly and a connecting assembly are arranged in the machine shell insert (19), and the connecting assembly is used for connecting the disposable sterile planing cutter head and the driving assembly.

3. The planing tool according to claim 2, characterized in that The driving 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), the brushless motor (15) is coated with a motor shell (17) outside, and a motor shaft (113) is arranged in the brushless motor (15).

4. The planing tool according to claim 3, characterized in that A motor shell sleeve (18) is sleeved outside the motor shell (17), the motor shell sleeve (18) is arranged in the machine shell sleeve (110), and the motor shell sleeve (18) is connected with the front cap body (21).

5. The planing tool according to claim 3, characterized in that The connecting assembly comprises a motor connecting sleeve (114), the motor connecting sleeve (114) is sleeved on the motor shaft (113), a bearing spacer (115) is arranged outside the motor connecting sleeve (114), and a bearing three (116) is abutted at the other end of the bearing spacer (115).

6. The planing tool according to claim 4, characterized in that The fuselage assembly (1) is provided with a first cooling system, the first cooling system includes a water inlet channel one (120) arranged inside the motor sealing cover (12), a water inlet channel two (121) formed between the motor sealing cover (12) and the casing insert (19), a water inlet channel three (122) formed between the motor shell sleeve (18) and the casing insert (19), a water inlet channel four (123) formed between the casing sleeve (110) and the motor shell sleeve (18), a water inlet channel five (124) opened at the head of the casing sleeve (110), and an annular water channel one (125) opened at the head of the casing sleeve (110). Wherein the water inlet channel one (120), the water inlet channel two (121), the water inlet channel three (122), the water inlet channel four (123), the water inlet channel five (124) and the annular water channel one (125) are sequentially communicated.

7. The planing tool according to claim 1, characterized in that The front cap assembly (2) is provided with a second cooling system, the second cooling system includes an annular water channel two (210) opened at one end of the front cap body (21), a water spraying channel (217) opened inside the front cap body (21), and a water spraying port (216) communicated with the water spraying channel (217), wherein the other end of the water spraying channel (217) is communicated with the annular water channel two (210).

8. The planing tool according to claim 1, characterized in that The front cap body (21) is internally provided with a tool bit mounting hole (215), the button seat (22) includes a moving main body (222), the moving main body (222) is provided with an assembly hole (223) in the middle; When the disposable sterile planing tool bit is installed, press the button (23), so that the assembly hole (223) of the moving main body (222) is positionally corresponding to the tool bit mounting hole (215).

9. The planing tool according to claim 8, characterized in that The step surface of the limiting step (31) of the disposable sterile planing tool bit is gap arranged between the bearing four (24) or the moving main body (222). The gap is set to be 0.5mm or less.

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