Electric planing cutter

Abstract

The utility model relates to the technical field of medical instruments, and discloses an electric planing knife which enables a driving handle to be repeatedly used and solves the problem of resource waste. The electric planing knife comprises a driving handle, a first magnetic coupling driving device and a second magnetic coupling driving device, wherein the driving handle comprises a handle shell and a motor and a first magnetic coupling driving device; the tool bit connector comprises a first magnetic coupling driven device and a first tool bit transmission interface; the disposable tool bit comprises a planing tool bit and a second tool bit transmission interface; in the using state, the driving handle and the tool bit connector are detachably assembled together, and a first air gap is formed between the first magnetic coupling driving device and the first magnetic coupling driven device. The first tool bit transmission interface and the second tool bit transmission interface are detachably assembled together; rotation power output by the motor is transmitted to the first magnetic coupling driven device through the first magnetic coupling driving device in a magnetic coupling mode and then transmitted to the second tool bit transmission connector through the first tool bit transmission connector, and finally the planing tool bit is driven to conduct rotary planing.

Description

Technical Field

[0001] The present invention relates to the field of medical equipment, and in particular to surgical instruments. Background Art

[0002] Electric shavers are highly specialized medical tools used primarily in surgical procedures to precisely cut, remove or trim bones and soft tissues. Designed to improve surgical efficiency and precision, these tools are commonly used in complex surgeries such as fracture repair, bone marrow cutting, and joint replacement. Electric shavers usually consist of a shaver head and a handle, which drives the head to rotate through a mechanical structure to perform shavering tasks. However, traditional mechanical connections may cause wear between the head and the handle, which can affect surgical precision and stability. In addition, complex mechanical structures not only increase production and maintenance costs, but also require more parts and assembly processes.

[0003] Existing electric shavers are usually disposable medical consumables and are discarded after use. These electric shavers usually use high-cost precision servo motors to improve surgical fluency and reduce patient discomfort during and after the operation. However, after the operation, the expensive precision servo motors are also discarded, which not only increases the cost of the operation, but also causes a waste of resources. In addition, in existing electric shavers, the use of motors will introduce vibration and noise, which may affect the accuracy of the operation and increase the discomfort of the patient. Summary of the invention

[0004] The purpose of this application is to provide an electric planer to solve the problem of resource waste.

[0005] The present application discloses an electric planer, comprising:

[0006] A driving handle 20 includes a handle housing 21 and a motor 24 and a first magnetic coupling active device 28 disposed in the handle housing 21, wherein the output of the motor 24 is mechanically coupled to the first magnetic coupling active device 28;

[0007] The tool head connector 30 includes a first magnetic coupling driven device 31 and a first tool head transmission interface;

[0008] The disposable cutter head 40 includes a planing cutter head 41 and a second cutter head transmission interface;

[0009] When in use, the driving handle 20 and the cutter head connector 30 are detachably assembled together, forming a first air gap between the first magnetic coupling active device 28 and the first magnetic coupling driven device 31; the first cutter head transmission interface and the second cutter head transmission interface are detachably assembled together; the rotational power output by the motor 24 is transmitted to the first magnetic coupling driven device 31 by magnetic coupling through the first magnetic coupling active device 28, and then transmitted to the second cutter head transmission interface through the first cutter head transmission interface, thereby finally driving the planing head 41 to perform rotational planing.

[0010] In a preferred example, the first cutter head transmission interface includes a second magnetic coupling active device 32, which is mechanically coupled to the first magnetic coupling driven device 31; the second cutter head transmission interface includes a second magnetic coupling driven device 42, which is mechanically coupled to the planing cutter head 41;

[0011] When the first cutter head transmission interface and the second cutter head transmission interface are detachably assembled together, a second air gap is formed between the second magnetic coupling active device 32 and the second magnetic coupling driven device 42, and the second magnetic coupling active device 32 transmits rotational power to the second magnetic coupling driven device 42 in a magnetic coupling manner.

[0012] In a preferred example, the second magnetic coupling driven device 42 includes an output shaft, which is rigidly connected to the planing head 41 to transmit the rotational power received by the second magnetic coupling driven device 42 to the planing head 41, thereby driving the planing head 41 to rotate.

[0013] In a preferred example, the first cutter head transmission interface and the second cutter head transmission interface transmit the rotational power of the first magnetic coupling driven device 31 to the planing cutter head 41 by means of gear meshing transmission.

[0014] In a preferred example, the driving handle 20 also includes a reduction gear box 25, which is arranged between the output shaft of the motor 24 and the transmission mechanism, and is used to reduce the rotation speed of the motor 24 and increase the output torque. A driving gear 26 is rigidly connected to the output shaft of the reduction gear box 25, and the first magnetic coupling driving device 28 is coaxially rigidly connected to a driven gear 27, and the driving gear 26 and the driven gear 27 are meshed for transmission.

[0015] In a preferred example, the output of the motor 24 is mechanically coupled to the first magnetic coupling active device 28 by shaft transmission.

[0016] In a preferred example, the driving handle 20 also includes a rechargeable battery to power the motor 28 .

[0017] In a preferred example, the driving handle 20 also includes a wireless charging device for wirelessly and electromagnetically coupling with an external wireless charging power source, and using the electrical energy from the wireless charging power source to charge the rechargeable battery.

[0018] In a preferred example, the driving handle 40 has a sealed and waterproof handle housing.

[0019] In a preferred example, the first magnetic coupling active device 28 includes an outer rotor 61, which is mechanically coupled to the motor 24 through a reducer; the first magnetic coupling driven device 31 includes an inner rotor 62, which is mechanically coupled to the first cutter head transmission interface; the handle housing 21 seals the outer rotor 61 inside.

[0020] The embodiments of the present application have the following technical effects:

[0021] Reduced surgical costs: By allowing the motor to be reused, this application significantly reduces the cost of a single surgery. Traditional disposable electric shavers need to be replaced after each surgery, resulting in high costs. In contrast, this application allows high-cost precision motors to be reused in multiple surgeries, reducing the need for consumables, thereby significantly reducing long-term surgical costs.

[0022] Improve resource utilization efficiency: In addition to reducing costs, the reuse of precision motors also improves resource utilization efficiency. It reduces the demand for disposable medical equipment, thereby reducing medical waste and the impact on the environment, which is in line with the principle of sustainable development.

[0023] Maintaining operational precision and reliability: Magnetic coupling eliminates direct mechanical coupling between the handle and the blade, such as gear meshing, and solves the problem of wear on the joint between the blade and the handle. Even with repeated use, it can maintain operational precision and reliability. In addition, the air gap of magnetic coupling greatly weakens the vibration transmitted to the blade by the motor. This means that doctors can rely on the electric shaver to perform high-precision surgical operations without worrying about the performance of the device degrading over time.

[0024] Speed ​​up the surgical preparation and execution process: Since the handle containing the motor can be reused, the surgical preparation time can be shortened because there is no need to prepare and calibrate new equipment before each operation. This makes the surgical process more efficient and can respond quickly in emergency situations.

[0025] In summary, this application not only significantly reduces surgical costs, but also improves surgical efficiency and environmental sustainability, while ensuring surgical accuracy and reliability, bringing substantial benefits to medical institutions and patients.

[0026] Furthermore, the driving handle is enclosed in a sealed and waterproof housing, and the interface connecting the driving handle and the cutter head connector can be designed to be a smooth surface due to the use of magnetic coupling, without detailed physical structures (such as gears) that are easy to harbor dirt, so that the driving handle can be conveniently disinfected by soaking in a disinfectant liquid after use to ensure thorough disinfection. Because the housing is sealed, the noise of the motor can also be effectively reduced. The prior art cannot achieve the above effect because the handle cannot be enclosed in a sealed housing due to the use of gear transmission.

[0027] The specification of this application records a large number of technical features, which are distributed in various technical solutions. If all possible combinations of technical features of this application, i.e., technical solutions, are listed, the specification will be too long. In order to avoid this problem, the various technical features disclosed in the above-mentioned invention content of this application, the various technical features disclosed in the various embodiments and examples below, and the various technical features disclosed in the accompanying drawings can be freely combined with each other to form various new technical solutions. These technical solutions are deemed to have been recorded in this specification unless the combination of such technical features is technically infeasible. For example, in one example, feature A+B+C is disclosed, and in another example, feature A+B+D+E is disclosed. Features C and D are equivalent technical means that play the same role. Technically, only one can be used, and it is impossible to use them at the same time. Feature E can be combined with feature C technically. Then, the solution of A+B+C+D should not be deemed to have been recorded because it is technically infeasible, while the solution of A+B+C+E should be deemed to have been recorded. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of an electric planer according to an embodiment of the present application;

[0029] Figure 2 is a schematic structural diagram of a handle of an electric planer according to an embodiment of the present application;

[0030] Figure 3 is a schematic structural diagram of a cutter head connector of an electric planer according to an embodiment of the present application;

[0031] Figure 4 is a schematic structural diagram of a disposable cutter head of an electric planer according to an embodiment of the present application;

[0032] Figure 5 A schematic diagram of a magnetic coupling transmission principle of an electric planer according to an embodiment of the present application;

[0033] Figure 6 It is a schematic diagram of another magnetic coupling transmission principle of an electric planer according to an embodiment of the present application.

[0034] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0035] 10: Electric planer

[0036] 20: Driving handle

[0037] 21: Handle shell

[0038] 22: Start button

[0039] 23: Battery

[0040] 24: Motor

[0041] 25: Reducer

[0042] 26: Driving gear

[0043] 27: Driven gear

[0044] 28: The first magnetic coupling active device

[0045] 29: Battery charging interface

[0046] 30: Blade connector

[0047] 31: First magnetic coupling driven device

[0048] 32: Second magnetic coupling active device

[0049] 40: Disposable blade

[0050] 41: Planing head

[0051] 42: Second magnetic coupling driven device

[0052] 61: Outer rotor

[0053] 62: Inner rotor

[0054] 63: driving shaft

[0055] 64: Driven shaft DETAILED DESCRIPTION

[0056] In the following description, many technical details are provided to help readers better understand the present application. However, those skilled in the art can understand that the technical solution claimed in the present application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0057] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0058] The embodiment of the present application relates to an electric planer, the structure of which is as follows: Figures 1 to 4 As shown, it includes: a driving handle 20, a blade connector 30 and a disposable blade 40. Among them,

[0059] The driving handle 20 further includes a handle housing 21 and a motor 24 and a first magnetic coupling active device 28 disposed in the handle housing 21, wherein the output of the motor 24 is mechanically coupled to the first magnetic coupling active device 28. Optionally, in one embodiment, the driving handle 20 takes ergonomics into consideration to make the operation more comfortable.

[0060] The tool head connector 30 further comprises a first magnetic coupling driven device 31 and a first tool head transmission interface. The tool head connector 30 is also designed to be disposable.

[0061] The disposable cutter head 40 further includes a planing cutter head 41 and a second cutter head transmission interface. The disposable cutter head 40 is designed for one-time use and can be safely discarded after use to ensure the hygiene and safety of the surgery or operation. The disposable cutter head 40 can be of various types, for example, according to the difference of the planing cutter head 41, it can be divided into a spherical cutter head, a flat cutter head, a saw-shaped cutter head, an elliptical cutter head or a cylindrical cutter head, etc., each having a different purpose. Various types of disposable cutter heads 40 have the same second cutter head transmission interface so as to be conveniently and stably connected to the cutter head connector 30.

[0062] Before use, the driving handle 20, the blade connector 30 and the disposable blade 40 are three independent components that are separated from each other.

[0063] In the use state, the driving handle 20 and the cutter head connector 30 are detachably assembled together, so that a first air gap is formed between the first magnetic coupling active device 28 and the first magnetic coupling driven device 31. The first cutter head transmission interface and the second cutter head transmission interface are detachably assembled together. The rotational power output by the motor 24 is transmitted to the first magnetic coupling driven device 31 in a magnetic coupling manner through the first magnetic coupling active device 28, and then transmitted to the second cutter head transmission interface through the first cutter head transmission interface, and finally drives the planing cutter head 41 to perform rotational planing. During use, the disposable cutter head 40 can be replaced as needed. After an operation is completed, the used cutter head connector 30 and the disposable cutter head 40 can be discarded.

[0064] Optionally, in one embodiment, a magnetic coupling method can be used between the cutter head connector 30 and the disposable cutter head 40. The first cutter head transmission interface includes a second magnetic coupling active device 32, which is coaxial with the first magnetic coupling driven device 31. The second cutter head transmission interface includes a second magnetic coupling driven device 42, which is coaxial with the planing cutter head 41. When the first cutter head transmission interface and the second cutter head transmission interface are detachably assembled together, a second air gap is formed between the second magnetic coupling active device 32 and the second magnetic coupling driven device 42, and the second magnetic coupling active device 32 transmits the rotational power to the second magnetic coupling driven device 42 in a magnetic coupling manner. The first cutter head transmission interface and the second cutter head transmission interface also include a bayonet structure. The bayonet interface is a common connection method that allows components to be quickly and safely connected and separated. The bayonet design not only ensures the stability and safety of the cutter head during use, but also allows the cutter head to be easily removed after use. The user can quickly replace the disposable cutter head 40 with a new one without touching the blade, thereby reducing the risk of cross contamination and improving the hygiene and safety of the operation.

[0065] Optionally, in one embodiment, a mechanical coupling method may be used between the cutter head connector 30 and the disposable cutter head 40. For example, the first cutter head transmission interface and the second cutter head transmission interface transmit the rotational power of the first magnetic coupling driven device 31 to the planing cutter head 41 by gear meshing transmission.

[0066] Optionally, in one embodiment, the second magnetic coupling driven device 42 includes an output shaft, which is rigidly connected to the planing cutter head 41 to transmit the rotational power received by the second magnetic coupling driven device 42 to the planing cutter head 41, thereby driving the planing cutter head 41 to rotate. The rigid connection ensures the stability of the cutter head during rotation, reduces energy loss, and improves cutting accuracy.

[0067] Optionally, in one embodiment, the driving handle 20 also includes a reduction box 25, which is arranged between the output shaft of the motor 24 and the transmission mechanism, and is used to reduce the speed of the motor 24 and increase the output torque. By adjusting the speed and torque, the reduction box 25 can make the electric planer more adaptable to different work requirements, such as providing greater cutting force or adapting to the planing of different materials. A driving gear 26 is rigidly connected to the output shaft of the reduction box 25, and this rigid connection ensures the stability and reliability of power transmission. The driven gear 27 is rigidly connected to the first magnetic coupling driving device 28 coaxially, ensuring seamless transfer of power between different components. The meshing transmission of the driving gear 26 and the driven gear 27 can not only further slow down the speed and increase the torque, but also provide a smooth and continuous power output, making the planing operation smoother and more precise.

[0068] Optionally, in one embodiment, the output of the motor 24 may also be mechanically coupled to the first magnetic coupling active device 28 via shaft transmission.

[0069] Optionally, in one embodiment, the driving handle 20 further includes a rechargeable battery to power the motor 28. The rechargeable battery may be a lithium-ion battery, a solid-state battery, a sodium-ion battery, or a nickel-metal hydride battery. Further, the driving handle 20 further includes a wireless charging device for wirelessly electromagnetically coupling with an external wireless charging power source, and using the power from the wireless charging power source to charge the rechargeable battery. For example, wireless charging may be achieved through the battery charging interface 29.

[0070] Optionally, in one embodiment, the driving handle 40 has a sealed and waterproof handle housing 21. This can improve the waterproof performance of the driving handle 40 and protect the motor, battery and electronic circuits therein. In addition, by integrating a rechargeable battery and a wireless charging module inside the handle, the device can be disinfected by soaking in a disinfectant after wireless charging is completed. The handle housing 21 can be designed in an integrated manner. This can reduce gaps on the surface of the handle, reduce the risk of bacterial accumulation, make cleaning and disinfection more convenient, and be more suitable for medical or hygienic environments with strict requirements.

[0071] Since medical equipment needs to be sterilized, in some embodiments of the present application, the handle of the electric planer considers some design and material optimizations, such as: the outer surface of the handle shell 21 is smooth and seamless, so as to facilitate cleaning and disinfection, and grooves or gaps that accumulate bacteria and viruses should be avoided as much as possible; the handle shell 21 is made of wear-resistant and corrosion-resistant materials so that it can remain in good condition after long-term use and multiple disinfections; the material of the handle shell 21 can withstand high temperatures and common disinfection chemicals, such as alcohol, hydrogen peroxide and chlorhexidine, etc., which can ensure that the equipment will not be damaged during disinfection. Optionally, the waterproof handle shell 21 can be made of polystyrene, polycarbonate, polyamide, polytetrafluoroethylene and other materials, so that the drive handle 20 can be conveniently disinfected by soaking in a disinfectant liquid, so that it is easy to reuse. The handle shell 21 can be made of chemically resistant materials to ensure that the handle can remain in normal working condition even after multiple disinfections and uses.

[0072] Optionally, in one embodiment, a soft material such as closed-cell foam rubber, silicone foam, thermoplastic rubber (TPE), etc. is filled between the handle housing 21 and the motor 24 to achieve the effect of vibration and sound absorption. On the one hand, the noise of the motor 24 can be greatly reduced, and on the other hand, most of the vibration of the motor 24 can be absorbed by the filling material and is not easily transmitted to the cutter head connector 30 through the handle housing 21. In addition, the air gap of the magnetic coupling greatly weakens the vibration of the motor 24 transmitted to the cutter head connector 30, so the overall effect of the vibration of the motor 24 on the planing cutter head 41 will be greatly reduced.

[0073] Optionally, in one embodiment, the driving handle 20 further includes a start button 22 , which is disposed on the handle housing 21 and is used to control the start and stop of the motor 24 .

[0074] Optionally, in one embodiment, considering that the driving handle 20 of the electric planer will be reused, the designer may choose to integrate relatively expensive electronic components, such as control chips and sensors, inside the handle. This approach makes the handle not just a simple gripping device, but an electronic device with advanced functions and intelligent control. The control chip can be used for multiple functions such as processing data, controlling motor speed, and receiving user input.

[0075] Optionally, in one embodiment, a chip or other intelligent component integrated in the drive handle 20 can be used to implement a speed control function, which means that the user can select the appropriate motor speed according to different types of surgeries. For example, a lower speed may be required for fine surface planing, while a higher speed may be required when a large amount of material needs to be removed quickly. By providing an adjustable speed setting, the electric planer can better adapt to different surgical scenarios and needs. The user can select the most appropriate speed setting based on the specific surgical situation or personal preference, thereby improving surgical efficiency and safety.

[0076] Optionally, in one embodiment, optionally, the working torque between the magnetic coupling active device and the magnetic coupling driven device is approximately 60% of the maximum torque. When the load exceeds the maximum torque, the magnetic coupling active device and the magnetic coupling driven device will begin to "slip", that is, the magnets will jump from one coupling state to another, causing circumferential displacement. In this process, the magnetic field in the air gap changes rapidly, and the magnets of the inner and outer rotors undergo demagnetization and remagnetization at the same time, generating heat, causing the temperature to rise to more than 100°C in a short period of time, which may cause the magnets to demagnetize. Therefore, the magnetic coupling mechanism can play an overload protection role in the electric planer. Usually, the electric planer can have other overload protection mechanisms at the same time, and the magnetic coupling overload protection can be used as a bottom-line overload protection mechanism when other overload protection mechanisms fail.

[0077] Optionally, in one embodiment, the driving handle 20 also includes a temperature sensor and a controller. The temperature sensor is arranged near the first magnetic coupling active device 28, and is used to detect the temperature of the first magnetic coupling active device 28. The temperature sensor transmits the detected temperature to the controller. When the controller determines that the detected temperature exceeds a predetermined threshold, the power output of the motor 24 is reduced or stopped. There can be multiple thresholds, for example, first, second and third thresholds that increase in sequence. When the temperature detected by the temperature sensor is between the first and second thresholds, the speed of the motor 24 is controlled below the first speed threshold. When the temperature detected by the temperature sensor is between the second and third thresholds, the speed of the motor 24 is controlled below the second speed threshold. When the temperature detected by the temperature sensor exceeds the third threshold, the power supply to the motor 24 is stopped. Among them, the first speed threshold is greater than the second speed threshold.

[0078] Optionally, the magnetically coupled slave and the magnetically coupled master can be used Figure 5 or Figure 6 Magnetic coupling is achieved in the manner shown.

[0079] like Figure 5 As shown in the figure, magnets are installed on two discs of the same diameter in a manner that the N and S poles are crossed. When in use, the two discs belong to the magnetic coupling active device and the magnetic coupling passive device respectively, with a certain air gap in between. Since the N pole of one magnet attracts the S pole of the other magnet opposite and repels the N poles on both sides of the magnet, it is ensured that within a certain torque range, the magnetic coupling active device and the magnetic coupling passive device keep rotating synchronously.

[0080] Furthermore, in actual work, the true NS relative state only exists in the state of no torque output. As long as there is torque generated, the driven disk will have a certain phase angle with the active disk. This angular displacement is maintained and increased until the torque is large enough to make the N pole relative to the opposite N pole, and then the transmission "slips", the two turntables rotate and displace, and jump to the next pair of coupling states. Due to the above characteristics, although magnetic transmission can be synchronized, it cannot achieve precise synchronous transmission. This planar transmission has a simple structure and does not require high coaxiality of the two shafts during installation. Since the principle of plane attraction is adopted, the smaller the air gap, the greater the torque.

[0081] Figure 6It is another magnetic coupling method, including: an outer rotor 61 and an inner rotor 62. The outer rotor 61 is fixed to the driving shaft 63, and the inner rotor 62 is fixed to the driven shaft 64. Magnets are installed on the outer circumference of the inner rotor and the inner circumference of the outer rotor respectively. The magnets have an even number of poles and are arranged circumferentially in a NS cross manner. Automatic coupling is achieved by aligning the working surfaces of the magnets of the inner and outer rotors. There is a certain air gap between the inner and outer rotors to isolate the active and driven components. The size of the air gap is mostly between 2mm-8mm. The smaller the air gap, the more effective the utilization of the magnet, and the more difficult the isolation; the larger the air gap, the more convenient the isolation, but the worse the effective utilization of the magnetic field of the magnet. The radius position of the air gap is the working radius of the transmission of this structure. Therefore, when designing, the torque of the required transmission can be obtained by adjusting the radius of the air gap. When the air gap remains unchanged, increasing the axial length of the coupling magnet, that is, the coupling area, can also increase the torque approximately in proportion.

[0082] Figure 6 The torque range of the coaxial magnetic transmission shown is generally between 3Nm-500Nm, and the larger one can reach 2000Nm. An isolation sleeve is installed between the inner and outer rotors to seal the inner or outer rotor, and the torque can still be transmitted. This is the principle of sealing using magnetic transmission. The magnetic transmission structure transforms the dynamic seal into a static seal, which is also the biggest advantage of magnetic transmission.

[0083] Optionally, in one embodiment, in the driving handle 20, the first magnetic coupling active device 28 includes an outer rotor 61, which is mechanically coupled to the motor 24 through a reducer. In the tool head connector 30, the first magnetic coupling driven device 31 includes an inner rotor 62, which is mechanically coupled to the first tool head transmission interface through coaxial or gear meshing. The sealed handle housing 21 seals the outer rotor 61 inside, but the outer rotor 61 can still transmit torque to the inner rotor 62. In another embodiment, the inner rotor 62 can also be arranged in the first magnetic coupling active device 28, the outer rotor 61 can be arranged in the first magnetic coupling driven device 31, and the sealed handle housing 21 seals the inner rotor 62 inside.

[0084] There are many ways to install and fix the driving handle 20 and the cutter head connector 30. For the sake of description, the parts of the driving handle 20 and the cutter head connector 30 that interface with each other are respectively referred to as the first interface part and the second interface part. Optionally, in one embodiment, the first interface part and the second interface part can both be cylindrical, the inner surface of the first interface part is provided with an internal thread, and the top outer surface of the second interface part is provided with an external thread, and the diameters of the two are matched, so that the cutter head connector 30 can be assembled to the first interface part on the handle housing 21 of the driving handle 20 in a rotatable manner through the second interface part. For another example, the cross-sections of the first interface part and the second interface part can be rectangular, the second interface part can be inserted into the first interface part, and the elastic bayonet is used to realize the relative position locking of the first interface part and the second interface part after insertion, which can be similar to the interface between the magazine and the gun body of a firearm.

[0085] Optional, Figure 5 and Figure 6 The magnets in the device can all be made of rare earth permanent magnets, which have the characteristics of high magnetic energy product and high coercivity, and can ensure the efficiency and reliability of magnetic coupling transmission while achieving miniaturization and lightweight. High magnetic energy product means that the magnet can generate a strong magnetic field and can be smaller in size. This is very important for equipment that requires precise and strong magnetic coupling, because it can reduce the size of the equipment without sacrificing performance. High coercivity refers to the ability of a magnet to resist the change of its magnetization state by an external magnetic field. Magnets with high coercivity are not easily demagnetized, which is crucial in maintaining the stability and reliability of magnetic coupling transmission. By using this high-performance rare earth permanent magnet, the magnetic coupling component of the electric planer can be miniaturized and lightweight without sacrificing performance. This not only reduces the overall weight of the equipment, making the operation more flexible and convenient, but also helps to improve the portability of the equipment and the work efficiency of the user. The use of this high-performance magnet ensures that the magnetic coupling transmission system of the electric planer can work efficiently and reliably. Even in a compact space, it can provide stable and powerful magnetic coupling force, ensuring the precision and continuity of the planing operation.

[0086] Optionally, in one embodiment, the magnet of the first magnetic coupling active device 28 can be implemented by an electromagnet. The driving handle 20 also includes a controller for determining the current intensity provided to the electromagnet according to the user's setting, thereby changing the transmission efficiency between the first magnetic coupling active device 28 and the first magnetic coupling driven device 31.

[0087] Optionally, in one embodiment, a Hall speed sensor can be installed on the moving parts of the electric planer (e.g., the driving gear 26, the driven gear 27, the first magnetic coupling driven device 31, etc.). The Hall sensor can detect the rotation speed of the moving parts in real time. The detected speed signal is transmitted to the controller in the drive handle 20, and a safe rotation speed threshold is set. When the actual rotation speed exceeds the safe threshold, the controller immediately cuts off the power supply circuit, stops the motor from working, and achieves the purpose of overload protection. Manual restart is required to resume work.

[0088] Optionally, in one embodiment, a torque sensor can be installed inside the cutter head connector 30 to detect the torque transmitted to the cutter head in real time. When different materials are planed, the cutter head is subject to different resistances, and the corresponding torques are also different. Soft tissue resistance is the smallest, and bone resistance is the largest. The torque signal is transmitted to the controller in the drive handle 20, and several torque ranges are set for different surgeries. The controller determines the material currently planed according to the torque size, and adjusts the speed and torque output of the motor to achieve precise control. For example, when encountering hard bones, it automatically slows down and increases the torque to avoid the cutter head from getting stuck. The realization of this function also requires the integration of torque signal acquisition circuits and control algorithms in the handle. Several working modes can be set for different surgeries, such as soft tissue cutting mode, bone planing mode, etc., which can be selected by the user. Each mode corresponds to a different control strategy.

[0089] The mechanical coupling mentioned in the various embodiments of the present application may be various, including but not limited to: gear coupling, shaft coupling, chain and belt drive, etc.

[0090] It should be noted that in the application documents of this patent, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one" do not exclude the existence of other identical elements in the process, method, article or device including the elements. In the application documents of this patent, if it is mentioned that an action is performed according to an element, it means that the action is performed at least according to the element, which includes two situations: performing the action only according to the element, and performing the action according to the element and other elements. Expressions such as multiple, multiple, and multiple include 2, 2 times, 2 kinds, and more than 2, more than 2 times, and more than 2 kinds.

[0091] All documents mentioned in this application are considered to be included in the disclosure of this application as a whole, so that they can be used as the basis for modification when necessary. In addition, it should be understood that after reading the above disclosure of this application, those skilled in the art can make various changes or modifications to this application, and these equivalent forms also fall within the scope of protection claimed in this application.

Claims

1. An electric planer, characterized in that: include: A driving handle (20) comprising a handle housing (21), a motor (24) and a first magnetic coupling active device (28) disposed in the handle housing (21), wherein the output of the motor (24) is mechanically coupled to the first magnetic coupling active device (28); A tool head connector (30), comprising a first magnetic coupling driven device (31) and a first tool head transmission interface; A disposable cutter head (40) comprising a planing cutter head (41) and a second cutter head transmission interface; In the use state, the driving handle (20) and the cutter head connector (30) are detachably assembled together, and a first air gap is formed between the first magnetic coupling active device (28) and the first magnetic coupling driven device (31); the first cutter head transmission interface and the second cutter head transmission interface are detachably assembled together; the rotational power output by the motor (24) is transmitted to the first magnetic coupling driven device (31) in a magnetic coupling manner through the first magnetic coupling active device (28), and then transmitted to the second cutter head transmission interface through the first cutter head transmission interface, and finally drives the planing cutter head (41) to perform rotational planing.

2. The electric planer according to claim 1, characterized in that: The first cutter head transmission interface comprises a second magnetic coupling active device (32), and the second magnetic coupling active device (32) is mechanically coupled to the first magnetic coupling driven device (31); the second cutter head transmission interface comprises a second magnetic coupling driven device (42), and the second magnetic coupling driven device (42) is mechanically coupled to the planing cutter head (41); When the first cutter head transmission interface and the second cutter head transmission interface are detachably assembled together, a second air gap is formed between the second magnetic coupling active device (32) and the second magnetic coupling driven device (42), and the second magnetic coupling active device (32) transmits the rotational power to the second magnetic coupling driven device (42) in a magnetic coupling manner.

3. The electric planer according to claim 2, characterized in that: The second magnetic coupling driven device (42) comprises an output shaft, which is rigidly connected to the planing cutter head (41) so as to transmit the rotational power received by the second magnetic coupling driven device (42) to the planing cutter head (41), thereby driving the planing cutter head (41) to rotate.

4. The electric planer according to claim 1, characterized in that: The first cutter head transmission interface and the second cutter head transmission interface transmit the rotational power of the first magnetic coupling driven device (31) to the planing cutter head (41) by means of gear meshing transmission.

5. The electric planer according to claim 1, characterized in that: The driving handle (20) further comprises a reduction box (25), the reduction box (25) being arranged between the output shaft of the motor (24) and the transmission mechanism, and being used to reduce the rotation speed of the motor (24) and increase the output torque; a driving gear (26) is rigidly connected to the output shaft of the reduction box (25); the first magnetic coupling driving device (28) is coaxially rigidly connected to a driven gear (27); the driving gear (26) and the driven gear (27) are meshed and driven.

6. The electric planer according to claim 1, characterized in that: The output of the motor (24) is mechanically coupled to the first magnetic coupling active device (28) by shaft transmission.

7. The electric planer according to claim 1, characterized in that: The driving handle (20) also includes a rechargeable battery for supplying power to the motor (24).

8. The electric planer according to claim 7, characterized in that: The driving handle (20) also includes a wireless charging device, which is used for wirelessly and electromagnetically coupling with an external wireless charging power source, and using the electric energy from the wireless charging power source to charge the rechargeable battery.

9. The electric planer according to claim 1, characterized in that: The driving handle (20) has a sealed and waterproof handle housing.

10. The electric planer according to claim 1, characterized in that: The first magnetic coupling active device (28) includes an outer rotor (61), which is mechanically coupled to the motor (24) through a reducer; the first magnetic coupling driven device (31) includes an inner rotor (62), which is mechanically coupled to the first cutter head transmission interface; the handle housing (21) seals the outer rotor (61) inside.

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