Disposable planing power system

Abstract

The invention discloses a disposable planing power system, which belongs to the technical field of medical instruments and comprises a driving source, a driving part and a transmission part, and the driving source comprises a flexible shaft and an infusion tube. The driving piece comprises a rear end cover and a transmission shaft, and a first water passing cavity is formed in the rear end cover. The transmission part comprises a front end cover, a driven shaft and a cutter shaft, a second water passing cavity is formed in the front end cover, the front end cover and the rear end cover are detachably connected, the driven shaft and the transmission shaft can be clamped with each other, and the first water passing cavity is communicated with the second water passing cavity. The motor originally arranged in the osteotomy device is externally arranged in the driving source serving as driving equipment, and the rotation effect of the motor is conducted through the flexible shaft, so that heat generated by the motor cannot be conducted to the cutter shaft to cause overheating of the cutter shaft and a wound. The osteotomy device with the motor removed is light in weight and small in vibration, and medical staff can conduct precise operation more conveniently.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, in particular to a disposable planing power system. Background Art

[0002] Medical cutting milling cutters or bone drilling milling cutters are key tools commonly used in neurosurgery, used for operations such as cutting bone or drilling holes, especially as core instruments in minimally invasive osteotomy for hallux valgus. During long-term, high-intensity work, the drill bit and motor will generate a lot of heat, which may have adverse effects on surgical patients and surgical personnel, such as causing tissue damage and prolonging the operation time. Overheating can also cause drill bit failure, reduce cutting or drilling efficiency, and prolong the operation time. Therefore, effective cooling of the drill bit is crucial.

[0003] Patent document CN109330658A discloses a liquid-cooled bone drill, including a cooling chamber, an internal water inlet and an internal water outlet. Physiological saline enters the cooling chamber through the internal water inlet, cools the bone drill in the cooling chamber, and then is discharged from the internal water outlet. This bone drill is internally cooled, and the coolant cools the bone drill from the inside, but after use, the coolant will remain inside the bone drill, which is prone to breed bacteria over time, increasing the risk of infection. Therefore, the inside of the bone drill needs to be disinfected every time it is used, which increases a lot of workload.

[0004] The traditional osteotomy is an integrated device, with the knife shaft and the motor shaft connected detachably by a chuck key, which facilitates the replacement of knife shafts with different functions. However, the high-speed rotation of the knife shaft will wear out the chuck key. As the number of uses increases, the chuck key gradually ages and the limit function gradually loses. The knife shaft is very likely to fall off during surgery, which poses a risk. In addition, the detachable connection between the knife shaft and the motor shaft will lead to a decrease in the rigidity and stability of the connection, which in turn leads to a decrease in the ability to withstand torque and rotational force, reducing the speed limit of the osteotomy. Summary of the invention

[0005] The object of the present invention is to provide a one-time planing power system to solve the problems raised in the above background technology.

[0006] A one-time planing power system is provided, comprising:

[0007] A driving source, comprising a flexible shaft and an infusion tube extending from the driving source;

[0008] The driving member includes a rear end cover and a transmission shaft, wherein the transmission shaft is rotatably connected to the interior of the rear end cover, wherein the interior of the rear end cover forms a first water passage cavity, wherein the other end of the flexible shaft passes through the rear end cover and is fixedly connected to the transmission shaft, and the other end of the infusion tube passes through the rear end cover and is in communication with the first water passage cavity;

[0009] The transmission member includes a front end cover, a driven shaft and a knife shaft, wherein the driven shaft is rotatably connected to the interior of the front end cover, the knife shaft is fixedly connected to the driven shaft and rotatably connected to the interior of the front end cover, a second water passage cavity is formed inside the front end cover, the front end cover and the rear end cover are detachably connected, the driven shaft and the transmission shaft can be engaged with each other, and the first water passage cavity is communicated with the second water passage cavity;

[0010] The driving member and the driving source are reusable parts, and the transmission member is a disposable part.

[0011] As a further solution of the present invention: the first water passage cavity is provided with a first cavity and a plurality of first water flow channels in sequence along the water flow direction, the plurality of first water flow channels are arranged along the circumference of the rear end cover, and a filter assembly is provided in the first cavity along the annular direction.

[0012] As a further solution of the present invention: the filter assembly includes a metal branch net and a water-permeable membrane, and the water-permeable membrane is fixedly connected to the interior of the first cavity through the metal branch net.

[0013] As a further solution of the present invention: the water permeable membrane is an ultrafiltration membrane, and the pore size of the ultrafiltration membrane is between 1nm and 100nm.

[0014] As a further solution of the present invention: the pore size of the ultrafiltration membrane is between 1 nm and 10 nm.

[0015] As a further solution of the present invention: the end of the rear end cover close to the transmission shaft is provided with an internal threaded opening and a sealing opening from the outside to the inside in sequence, and the end of the front end cover close to the driven shaft is provided with an external threaded groove and a sealing groove that cooperate with the internal threaded opening and the sealing opening, respectively; the first water passage chamber is connected to the cavity between the internal threaded opening and the sealing opening, and the second water passage chamber is connected to the cavity between the external threaded groove and the sealing groove.

[0016] As a further solution of the present invention: the sealing port is provided with a bending section along the circumferential direction, the inner wall of the sealing groove close to the driven shaft side is formed with a bending port which is in contact with the bending section of the sealing port, and a sealing ring is provided on the inclined surface of the bending port.

[0017] As a further solution of the present invention: the transmission shaft is evenly provided with a plurality of limit interfaces along the circumferential direction, the limit interfaces include an interface vertical surface and an interface curved surface, the driven shaft is evenly provided with a plurality of limit snap-fits which engage with the limit interfaces along the circumferential direction, the limit snap-fits include a snap-fit ​​vertical surface and a snap-fit ​​curved surface.

[0018] As a further solution of the present invention: a sterilization input port is provided on the side wall of the rear end cover, and the sterilization input port is communicated with the first water passage chamber.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The motor originally installed in the osteotomy device is installed in the driving source of the driving device, and the rotation of the motor is transmitted through the flexible shaft, so that the heat generated by the motor will not be transmitted to the knife shaft, causing the knife shaft to overheat, thereby avoiding the overheated knife shaft from damaging the wound. After removing the motor, the osteotomy device is light in weight and has less vibration, which is more convenient for medical staff to perform precise operations for a long time.

[0021] 2. The osteotomy device is divided into two parts: the drive part and the transmission part. The drive part is integrated with the drive source and is a reusable part, while the transmission part is a disposable part. The transmission shaft in the transmission part is fixedly connected to the knife shaft, so that the connection part can withstand greater torque, improve the speed and stability of the knife shaft, and there is no need to consider the risk of the knife shaft falling off and breaking during a single operation, which greatly improves the safety of the operation. When it is necessary to replace the knife shaft with other forms and functions, the transmission part can be removed and replaced. Compared with maintaining or replacing the entire machine, the economic cost and labor cost of replacing only the transmission part are lower.

[0022] 3. During the hallux valgus surgery, a large amount of bone debris will splash and enter the osteotomy, which is extremely difficult to clean and requires high maintenance costs. However, the osteotomy of the present invention can dismantle and discard the transmission parts after the surgery. The driving parts will not be affected by the bone debris, and the parts wear more slowly, so they can be used for a long time, and only simple disinfection is required afterwards. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0024] Figure 1 It is a partial cross-sectional schematic diagram of a one-time planing power system;

[0025] Figure 2 It is a schematic diagram of the overall structure of a one-time planing power system;

[0026] Figure 3 A schematic cross-sectional view of a transmission member provided by the present invention;

[0027] Figure 4 for Figure 3 A magnified image of area A;

[0028] Figure 5 A schematic cross-sectional view of a driving member provided by the present invention;

[0029] Figure 6 for Figure 5 Enlarged view of area B;

[0030] Figure 7A schematic diagram of the structure of the limiting interface viewing angle 1 provided by the present invention;

[0031] Figure 8 A schematic diagram of the structure of the position limiting interface viewing angle 2 provided by the present invention;

[0032] Fig. 9 A schematic diagram of the structure of the position limiting bayonet provided by the present invention;

[0033] Fig.10 It is a schematic diagram of the assembly of a one-time planing power system;

[0034] Fig.11 for Fig.10 Magnified view of area C.

[0035] In the figure: 1. driving source; 11. flexible shaft; 12. infusion tube; 2. driving member; 21. rear end cover; 211. internal threaded port; 212. plugging port; 213. sterilization input port; 2121. bending section; 22. transmission shaft; 221. limiting interface; 2211. interface vertical surface; 2212. interface curved surface; 23. first water passage chamber; 231. first cavity; 232. first water flow channel; 24. filtering component; 241. metal support net; 242. water permeable membrane; 3. transmission member; 31. front end cover; 311. external threaded groove; 312. plugging groove; 3121. bending port; 32. driven shaft; 321. limiting bayonet; 3211. bayonet vertical surface; 3212. bayonet curved surface; 33. knife shaft; 34. second water passage chamber; 35. sealing ring. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0038] See also Figure 1 and Figure 2As shown, in an embodiment of the present invention, a disposable planing power system includes a driving source 1, a driving member 2 and a transmission member 3. The driving source 1 includes a flexible shaft 11 and a fluid infusion tube 12 led out from the driving source 1. The driving member 2 includes a rear end cover 21 and a transmission shaft 22. The transmission shaft 22 is rotatably connected to the interior of the rear end cover 21. An annular cavity is provided between the interior of the rear end cover 21 and the transmission shaft 22 to form a first water passage cavity 23. The other end of the flexible shaft 11 penetrates the rear end cover 21 and is fixedly connected to the transmission shaft 22. The other end of the fluid infusion tube 12 penetrates the rear end cover 21 and is communicated with the first water passage cavity 23. The transmission member 3 includes a front cover 31, a driven shaft 32 and a knife shaft 33. The driven shaft 32 is rotatably connected to the interior of the front cover 31. The knife shaft 33 is fixedly connected to the driven shaft 32 and is rotatably connected to the interior of the front cover 31. A second water passage chamber 34 is formed inside the front cover 31. The front cover 31 and the rear cover 21 are detachably connected. The driven shaft 32 and the transmission shaft 22 can be engaged with each other. The first water passage chamber 23 is connected to the second water passage chamber 34. The driving member 2 and the driving source 1 are reusable components, and the transmission member 3 is a disposable component.

[0039] See also Figure 1 and Figure 2 As shown, a driving motor and a water tank are arranged inside the driving source 1, and a flexible shaft 11 is connected to the motor shaft of the driving motor. The flexible shaft 11 is a flexible transmission element for transmitting torque, and is often used to connect two rotating shafts or between a shaft and a rotating component, so as to realize mechanical transmission. The flexible shaft 11 of the present invention is used to transmit the rotation of the driving motor, so that the osteotomy is freed from the distance limitation of the motor, so that the motor can be externalized, and the heat is prevented from being transferred to the knife shaft 33 when the motor is driven. The water tank can deliver physiological saline to the infusion tube 12, and deliver it to the osteotomy through the infusion tube 12 to cool down the components.

[0040] The flexible shaft 11 is connected to the transmission shaft 22 through a clamping sleeve or a clamping clamp, and the clamping force enables the flexible shaft to transmit torque and rotational motion when rotating. In addition, a spline connection can be performed between the flexible shaft 11 and the transmission shaft 22. The end of the flexible shaft has a spline, and a groove is provided at a position corresponding to the spline on the transmission shaft 22, and the torque is transmitted through the spline.

[0041] When using the osteotomy, the transmission member 3 is assembled with the driving member 2. After assembly, the transmission shaft 22 is engaged with the driven shaft 32, so that the transmission shaft 22 can transmit torque to the driven shaft 32. When the motor of the driving source 1 is started, the motor shaft drives the flexible shaft 11 to rotate, and drives the transmission shaft 22 to rotate through the transmission action of the flexible shaft 11. The transmission shaft 22 transmits torque to the driven shaft 32, and drives the driven shaft 32 to rotate, and the driven shaft 32 then drives the knife shaft 33 to rotate. At the same time, the driving pump in the water tank delivers saline to the infusion tube 12. After the transmission member 3 is assembled with the driving member 2, the first water chamber 23 is connected to the second water chamber 34. The saline passes through the first water chamber 23 and the second water chamber 34 in turn, and is finally sprayed out from the output port of the front end cover 31 to cool the knife shaft 33 and the wound.

[0042] During hallux valgus surgery, a large amount of impurities such as bone scraps will enter from the gap between the blade shaft 33 and the front end cover 31 or the gap of the first water passage chamber 23, which is difficult to clean. Therefore, after the surgery, the transmission member 3 is removed from the drive member 2. The transmission member 3 is disposable and can be discarded after removal, without the need for heavy cleaning and maintenance work. The transmission member 3 has few parts and a simple structure, so the cost is low. By frequently replacing the transmission member 3, the service life of the drive member 2 and the motor can be increased, and because the cost of cleaning and maintenance is reduced, the cost of using the osteotomy can be reduced overall.

[0043] See also Figure 5 and Figure 6 As shown, the first water passage cavity 23 is provided with a first cavity 231 and a plurality of first water flow channels 232 in sequence along the water flow direction, the plurality of first water flow channels 232 are arranged along the circumference of the rear end cover 21, and a filter assembly 24 is provided in the first cavity 231 along the annular direction. The infusion tube 12 passes through the rear end cover 21 and communicates with the first cavity 231. The first cavity 231 is an annular structure as a whole, and physiological saline can fill the entire first cavity 231, and the physiological saline is transported to the second water passage cavity 34 through the plurality of first water flow channels 232. Since there may be microorganisms such as bacteria in the physiological saline in the driving source 1, these microorganisms may cause risks such as infection to the patient if they enter the wound through the water flow, so a filter assembly 24 is provided in the first cavity 231. The filter assembly 24 can filter microorganisms and reduce the risk of infection to the patient.

[0044] The filter assembly 24 includes a metal support net 241 and a water-permeable membrane 242, and the water-permeable membrane 242 is fixedly connected to the inside of the first cavity 231 through the metal support net 241. The metal support net 241 is a mesh structure as a whole, which plays a role in supporting the water-permeable membrane 242. The water-permeable membrane 242 is a microporous membrane that can pass water molecules and intercept microorganisms, and can effectively block microorganisms outside the membrane to prevent microorganisms from moving along the water flow. Since the water permeability rate of the water-permeable membrane 242 is related to the water pressure, in order to ensure the water supply effect of the interceptor, the water-permeable membrane 242 needs to withstand a large water pressure, and the water-permeable membrane 242 can withstand a large water pressure without deformation after being attached to the metal support net 241, so as to prevent the water-permeable membrane 242 from breaking and losing the interception effect. The material used for the metal support net 241 can be copper, which is an antibacterial metal that can prevent bacteria from growing and multiplying on the surface and reduce the sterilization pressure of the osteotomy. In addition, if the water-permeable membrane 242 is damaged, the water-permeable membrane 242 can be replaced and fixed by the metal support net 241 .

[0045] In one embodiment, the water-permeable membrane 242 is an ultrafiltration membrane, and the pore size of the ultrafiltration membrane is between 1nm and 100nm. Since the diameter of bacteria is above 100nm, the ultrafiltration membrane with a pore size less than 100nm can play a good interception role, and the pore size greater than 1nm can ensure the passage of metal ions and prevent the metal ions in the saline from being blocked by the ultrafiltration membrane. Limited by the water pressure provided by the driving source 1, the pore size of the water-permeable membrane 242 cannot be too small. Too small pore size will cause the water flow rate of the water-permeable membrane 242 to be too slow, and it will be impossible to provide enough saline to the knife shaft 33 and the wound for cooling. In addition, when performing hallux valgus surgery, the sprayed saline also plays a role in blowing away bone chips, so the sprayed saline needs to have a certain water pressure, so the pore size of the water-permeable membrane 242 needs to be above 1nm.

[0046] In one embodiment, the pore size of the ultrafiltration membrane is between 1nm and 10nm. Since the diameter of the virus is between 10nm and 100nm, the pore size of 100nm can only be used to block bacteria, but not viruses. Therefore, in order to ensure that the water-permeable membrane 242 can play a sufficient cleaning role, the pore size of the ultrafiltration membrane can be less than 10nm. However, a too small pore size will affect the final sprayed water pressure, so the pore size of the ultrafiltration membrane can be controlled according to actual needs.

[0047] See also Figure 3 and Figure 5As shown, the end of the rear end cover 21 close to the transmission shaft 22 is provided with an internal threaded opening 211 and a sealing opening 212 from the outside to the inside, and the end of the front end cover 31 close to the driven shaft 32 is provided with an external threaded groove 311 and a sealing groove 312 which cooperate with the internal threaded opening 211 and the sealing opening 212, respectively. The first water passage chamber 23 is connected to the cavity between the internal threaded opening 211 and the sealing opening 212, and the second water passage chamber 34 is connected to the cavity between the external threaded groove 311 and the sealing groove 312.

[0048] The internal thread opening 211 is provided with an internal thread, and the external thread groove 311 is provided with an external thread, so that the transmission member 3 and the driving member 2 can be threadedly connected through the internal thread opening 211 and the external thread groove 311. The threaded connection has high reliability, convenient operation, strong stability after connection, and can effectively prevent vibration between the transmission member 3 and the driving member 2. In the process of the external thread groove 311 being screwed into the internal thread opening 211, the blocking port 212 will gradually approach the inside of the blocking groove 312. When the external thread groove 311 is screwed in to the limit, the blocking port 212 abuts against the innermost side wall of the blocking groove 312, and fits against the inner circle side wall of the blocking groove 312 to achieve blocking. After the connection is completed, the first water passage chamber 23 is connected to the second water passage chamber 34.

[0049] See also Figure 4 , Figure 5 , Fig.10 and Fig.11 As shown, the blocking port 212 is provided with a bending section 2121 along the annular direction, and the inner wall of the blocking groove 312 close to the driven shaft 32 is formed with a bending port 3121 that fits with the bending section 2121 of the blocking port 212, and a sealing ring 35 is provided on the inclined surface of the bending port 3121. Due to the influence of the processing accuracy, there may be a large gap between the blocking port 212 and the blocking groove 312, so a good sealing effect cannot be achieved. Through this structure, when the blocking port 212 extends into the blocking groove 312, the bending section 2121 can be tightly attached to the surface of the bending port 3121 and compress the sealing ring 35 on the bending port 3121. The sealing is performed by the sealing ring 35, which can effectively prevent physiological saline from entering through the gap between the blocking port 212 and the blocking groove 312 and contacting the transmission shaft 22 and the driven shaft 32, affecting the transmission of torque.

[0050] See also Figure 7-Figure 9As shown, the transmission shaft 22 is evenly provided with a plurality of limit interfaces 221 along the circumference, and the limit interfaces 221 include an interface vertical surface 2211 and an interface curved surface 2212. The driven shaft 32 is evenly provided with a plurality of limit bayonet holes 321 that engage with the limit interfaces 221 along the circumference, and the limit bayonet holes 321 include a bayonet vertical surface 3211 and a bayonet curved surface 3212. The driven shaft 32 is connected to the front cover 31 through a bearing, and the transmission shaft 22 is connected to the rear cover 21 through a bearing. When the internal threaded opening 211 is screwed into the external threaded groove 311, the driven shaft 32 and the transmission shaft 22 will not rotate significantly, but will approach each other until the limit bayonet holes 321 and the limit interfaces 221 contact and engage with each other.

[0051] Specifically, when the limit bayonet 321 approaches the limit interface 221, the bayonet curved surface 3212 will slide relative to the interface curved surface 2212, and the limit bayonet 321 can go deeper into the depth of the limit interface 221 until the limit bayonet 321 contacts the bottom of the limit interface 221. When the drive motor is started, the flexible shaft 11 drives the transmission shaft 22 to rotate from the interface vertical surface 2211 to the bayonet vertical surface 3211, and the interface vertical surface 2211 abuts against the bayonet vertical surface 3211, so that the transmission shaft 22 can drive the driven shaft 32 to rotate, thereby realizing the transmission of torque. This structure does not require personnel to assemble the limit bayonet 321 and the limit interface 221 separately, and when the internal threaded opening 211 and the external threaded groove 311 are threadedly connected, the self-engaging limit is realized.

[0052] See also Figure 1 and Figure 5 As shown, the side wall of the rear end cover 21 is provided with a sterilization input port 213, and the sterilization input port 213 is connected to the first water chamber 23. After the operation is over, the transmission member 3 is removed and discarded, and the drive member 2 can be sterilized by ethylene oxide. Ethylene oxide is a gas used for disinfection and sterilization, which can inactivate various microorganisms, including bacteria, fungi, viruses and spores. Ethylene oxide sterilization is a low-temperature sterilization method, which is suitable for sterilizing heat-sensitive items and avoids material denaturation or damage that may be caused by high-temperature sterilization. The sterilization input port 213 is used to input ethylene oxide into the first water chamber 23, so that ethylene oxide can penetrate into the interior of the drive member 2 for disinfection and sterilization, and then can be output from one end of the transmission shaft 22 along the first water chamber 23 to achieve gas circulation.

[0053] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A one-time planing power system, It is characterized in that include: A driving source (1), the osteotome comprising a flexible shaft (11) and an infusion tube (12), one end of the flexible shaft (11) and the infusion tube (12) being led out from the driving source (1) respectively; The driving member (2) comprises a rear end cover (21) and a transmission shaft (22), wherein the transmission shaft (22) is rotatably connected to the interior of the rear end cover (21), a first water passage cavity (23) is formed inside the rear end cover (21), the other end of the flexible shaft (11) passes through the rear end cover (21) and is fixedly connected to the transmission shaft (22), and the other end of the infusion tube (12) passes through the rear end cover (21) and is in communication with the first water passage cavity (23); The transmission member (3) comprises a front end cover (31), a driven shaft (32) and a knife shaft (33), wherein the driven shaft (32) is rotatably connected to the interior of the front end cover (31), the knife shaft (33) is fixedly connected to the driven shaft (32) and the knife shaft (33) is rotatably connected to the interior of the front end cover (31), a second water passage chamber (34) is formed inside the front end cover (31), the front end cover (31) and the rear end cover (21) are detachably connected, the driven shaft (32) and the transmission shaft (22) can be engaged with each other, and the first water passage chamber (23) is communicated with the second water passage chamber (34); The driving member (2) and the driving source (1) are reusable components, and the transmission member (3) is a disposable component.

2. A one-time planing power system according to claim 1, It is characterized in that The first water passage cavity (23) is provided with a first cavity (231) and a plurality of first water flow channels (232) in sequence along the water flow direction; the plurality of first water flow channels (232) are arranged along the circumference of the rear end cover (21); and a filter assembly (24) is provided in the first cavity (231) along the circumferential direction.

3. A one-time planing power system according to claim 2, It is characterized in that The filter assembly (24) comprises a metal branch net (241) and a water-permeable membrane (242); the water-permeable membrane (242) is fixedly connected to the interior of the first cavity (231) via the metal branch net (241).

4. A one-time planing power system according to claim 3, It is characterized in that The water permeable membrane (242) is an ultrafiltration membrane, and the pore size of the ultrafiltration membrane is between 1nm and 100nm.

5. A one-time planing power system according to claim 4, It is characterized in that The pore size of the ultrafiltration membrane is between 1nm and 10nm.

6. A one-time planing power system according to claim 1, It is characterized in that An end of the rear end cover (21) close to the transmission shaft (22) is provided with an internal thread opening (211) and a sealing opening (212) in sequence from the outside to the inside; an end of the front end cover (31) close to the driven shaft (32) is provided with an external thread groove (311) and a sealing groove (312) respectively cooperating with the internal thread opening (211) and the sealing opening (212); the first water passage cavity (23) is connected to the cavity between the internal thread opening (211) and the sealing opening (212); and the second water passage cavity (34) is connected to the cavity between the external thread groove (311) and the sealing groove (312).

7. A one-time planing power system according to claim 6, It is characterized in that The sealing opening (212) is provided with a bending section (2121) along the circumferential direction, and the inner wall of the sealing groove (312) close to the driven shaft (32) is formed with a bending opening (3121) that is in contact with the bending section (2121) of the sealing opening (212), and a sealing ring (35) is provided on the inclined surface of the bending opening (3121).

8. A one-time planing power system according to claim 6, It is characterized in that The transmission shaft (22) is evenly provided with a plurality of limit interfaces (221) along the circumferential direction, the limit interfaces (221) comprising an interface vertical surface (2211) and an interface curved surface (2212), and the driven shaft (32) is evenly provided with a plurality of limit bayonets (321) mutually engaged with the limit interfaces (221) along the circumferential direction, the limit bayonets (321) comprising a bayonet vertical surface (3211) and a bayonet curved surface (3212).

9. A one-time planing power system according to any one of claims 1 to 8, It is characterized in that A sterilization input port (213) is provided on the side wall of the rear end cover (21), and the sterilization input port (213) is communicated with the first water passage chamber (23).

Images