A magnetically driven inner disc lifting device and a cooking apparatus

Abstract

The utility model discloses a kind of inner disc lifting devices of magnetic drive and cooking equipment, it is related to cooking electrical appliance technical field.Magnetic drive's inner disc lifting device, including inner disc, drive assembly being located in the outer of inner disc, lifting rod group being connected with inner disc, outer cylinder being sleeved in the outer of lifting rod group, drive assembly includes drive motor and the female magnetic piece being located on drive motor, lifting rod group includes the first sleeve of abutment with inner disc, first rod group, bearing, transmission connecting piece and sub magnetic piece, first rod group is abutted with first sleeve, bearing is located between first rod group and sub magnetic piece.This device realizes power transmission using magnetism opposite sex attraction principle, drive motor and female magnetic piece are located in drive assembly, and sub magnetic piece and the lifting structure linked therewith are located in outer cylinder, and they realize non-contact transmission by opposite sex attraction principle, such design effectively realizes the physical isolation of driving part and wading area, improves waterproof and leakage-proof performance, while facilitating the cleaning and maintenance of inner disc.

Description

Technical Field

[0001] This utility model relates to the field of cooking appliance technology, and in particular to a magnetically driven inner plate lifting device and cooking equipment. Background Technology

[0002] As a key functional module in cooking equipment (such as lifting hot pots, sugar-reducing rice cookers, etc.), the inner plate lifting device's core function is to realize the automatic lifting of the cooking plate, thereby bringing users a more convenient cooking experience.

[0003] Traditional internal plate lifting devices typically employ an integrated design of the motor and push rod, where the motor is directly connected to the push rod via gears or other mechanical connectors for power transmission. While this design is structurally simple, it has several significant drawbacks. First, it increases the overall complexity of the device, severely limiting user convenience.

[0004] In certain cooking scenarios, the inner plate lifting device inevitably comes into contact with liquids, such as during cleaning or certain cooking techniques. However, the integrated design of the motor and push rod in traditional structures makes the motor prone to water leakage, which could lead to electrical leakage and pose a significant threat to user safety.

[0005] Furthermore, the forced connection between the motor components and the push rod not only restricts the disassembly of the device but also affects its operational flexibility to some extent. For example, when users need to clean the device or adjust the position of the inner plate, they may find the operation inconvenient due to the complex structure of the device, making it difficult to complete the operation quickly and smoothly, thus reducing the overall user experience.

[0006] In conclusion, while traditional motor-driven inner plate lifting devices have a certain degree of practicality in terms of functionality, they still have significant shortcomings in several key aspects, such as modular design, waterproof performance, ease of maintenance, and user experience.

[0007] This utility model was proposed in response to these shortcomings of the existing technology. Utility Model Content

[0008] To overcome the problems mentioned above, this invention provides a magnetically driven inner plate lifting device and a cooking appliance.

[0009] To achieve the above objectives, this utility model provides the following technical solution: A magnetically driven inner disc lifting device includes an inner disc, a drive assembly disposed outside the inner disc, and a lifting rod assembly connected to the inner disc. The inner disc lifting device further includes an outer cylinder sleeved outside the lifting rod assembly. The drive assembly includes a drive motor and a female magnetic component disposed on the drive motor. The lifting rod assembly includes a first sleeve abutting against the inner disc, a first rod assembly disposed within the first sleeve, a bearing, a transmission connector connected to the first rod assembly, and a sub-magnetic component connected to the transmission connector and cooperating with the female magnetic component for rotation. The first rod assembly abuts against the first sleeve. The bearing is disposed between the first rod assembly and the sub-magnetic component. The female magnetic component drives the sub-magnetic component to rotate. The bearing cooperates with the transmission connector to cause the first rod assembly to drive the first sleeve to lift. This device achieves power transmission through magnetic coupling. There is no mechanical through-wall connection between the drive assembly and the lifting rod assembly. The drive motor and its main magnetic component are located outside the cooking container, while the sub-magnetic component and its linked lifting structure are located inside the inner plate. The two achieve non-contact transmission through the principle of opposite poles attracting each other. This design effectively isolates the drive unit from the water-contaminated area, significantly improving waterproofing and leakage prevention, while also facilitating disassembly, cleaning, and maintenance. When the drive motor starts, its output drives the main magnetic component to rotate. The main magnetic component, through the principle of opposite poles attracting each other, drives the coaxially arranged sub-magnetic component to rotate synchronously. The sub-magnetic component drives the transmission connector to rotate, and then, via the bearing and the first rod assembly, converts the rotational motion into axial linear motion, pushing the first sleeve to rise and fall, thereby causing the inner plate to complete the lifting action. The bearing is designed to support the rotating components, reduce frictional resistance, and ensure a stable transmission relationship between the sub-magnetic component and the first rod assembly.

[0010] As described above, the magnetically driven inner disc lifting device includes an opening in the first sleeve. The first rod assembly includes a connector disposed within the first sleeve and abutting against the opening, and a screw disposed within the connector. The connector and the screw are threaded together. A limiting cylinder is provided outside the first sleeve to limit the position of the connector. Through the threaded engagement between the screw and the connector, combined with the circumferential limitation of the connector by the limiting cylinder, the rotation of the screw can be converted into axial linear motion of the connector and the first sleeve, thereby realizing the lifting of the inner disc. This transmission structure is simple and reliable, and can stably maintain the position of the inner disc in the power-off or stop state, preventing slippage due to load gravity. The opening and the limiting cylinder work together to ensure that the connector only moves linearly and does not rotate with the screw, improving the smoothness and guiding accuracy of the lifting process.

[0011] As described above, the magnetically driven inner disc lifting device further includes a limiting member located below the limiting cylinder. The limiting member is detachably connected to the limiting cylinder and forms a first inner cavity. The bearing is sleeved on the screw and disposed within the first inner cavity. The limiting member and the limiting cylinder form a closed first inner cavity, used to fix and support the bearing, enabling the bearing to support the rotational movement of the screw while limiting its axial displacement. This structure effectively improves the rotational coaxiality and operational stability of the screw, reduces vibration and wear during transmission, and the detachable design of the limiting member facilitates bearing replacement and maintenance, extending the service life of the entire lifting system and demonstrating good maintainability and modular design principles.

[0012] As described above, the magnetically driven inner disc lifting device further includes a reduction rotating component. This component comprises a first transmission component, a gear set, and a second transmission component. The first and second transmission components are respectively connected to the gear set. The first transmission component is interference-fitted with the screw, and the second transmission component is interference-fitted with the sub-magnetic component. The reduction rotating component adjusts its rotational speed and output torque through the gear set, enabling the device to provide sufficient lifting driving force even with a relatively low-power motor, adapting to different load conditions. This structure solves the problem of stalling or unstable lifting that easily occurs when a small motor drives a large load, improving the system's adaptability and operational stability. The interference fit ensures reliable power transmission, preventing slippage or loosening, and further guaranteeing the long-term durability of each component.

[0013] As described above, the magnetically driven inner disc lifting device includes a first outer cylinder and a second outer cylinder located outside the limiting cylinder. The first outer cylinder is positioned above the second outer cylinder, and the first rod assembly is located inside the limiting cylinder. The bearing, the deceleration rotating component, and the sub-magnetic component are all located inside the first outer cylinder. The outer cylinder serves as an integral support structure, providing protection and positioning for the internal transmission components. The first outer cylinder covers the lifting path, and the second outer cylinder accommodates the sub-magnetic component, the deceleration rotating component, and the bearing. The first and second outer cylinders form a closed, non-water-immersed transmission cavity, preventing liquid intrusion, enhancing structural rigidity, and preventing foreign objects from entering. Furthermore, this split-type outer cylinder design balances functional zoning and assembly convenience, facilitating the coordinated layout of the drive module and the lifting module, and improving the overall structural compactness and safety.

[0014] As described above, the magnetically driven inner disc lifting device includes a drive motor with a motor connecting shaft and a female magnetic component with a female magnetic connecting part. The motor connecting shaft and the female magnetic connecting part are interference-fitted. This interference fit enables efficient torque transmission between the drive motor and the female magnetic component. It features a simple structure, convenient assembly, and ensures reliable connection during operation without the need for additional fasteners. Furthermore, the interference fit provides excellent vibration resistance and anti-loosening capabilities, making it suitable for environments with frequent start-stop cycles. It ensures that the female magnetic component rotates synchronously with the drive motor, maintaining a stable magnetic field output and providing a reliable power source for magnetic coupling transmission.

[0015] As described above, in the magnetically driven inner disc lifting device, the drive motor and the main magnetic component are not coaxially arranged, while the main magnetic component, the first rod group, the bearing, the reduction rotating component, and the sub-magnetic component are coaxially arranged. The non-coaxial arrangement of the drive motor and the main magnetic component allows for flexible placement of the drive motor, saving installation space. The coaxial arrangement of the main magnetic component, the first rod group, and other components ensures the symmetry and uniformity of magnetic force transmission, reduces additional forces and vibrations caused by eccentricity, and improves the stability and reliability of the device's operation.

[0016] As described above, in the magnetically driven inner disc lifting device, both the main magnetic component and the sub-magnetic component are circular magnets. The transmission connector has a screw connection part and a sub-magnetic connection part. The screw connection part and the sub-magnetic connection part are opposite to each other and coaxially arranged. The sub-magnetic component is sleeved on the sub-magnetic connection part and has an interference fit with it. The screw connection part is sleeved on the end of the screw and has an interference fit with it. The circular magnet has a uniform magnetic force distribution, which can generate a stable magnetic field, ensuring the efficiency and stability of magnetic force transmission between the main magnetic component and the sub-magnetic component. Moreover, the magnet is made of high-performance permanent magnet material, which has strong magnetic force and good magnetic stability, and can maintain the magnetic force without decay over a long period of time, ensuring the service life of the device. The shape of the circular magnet is adapted to the structure of the transmission connector, so that the magnetic force action surface is uniformly corresponding. The relative arrangement of the screw connection part and the sub-magnetic connection part on the transmission connector makes the transmission path more direct and simple. The interference fit ensures that there is no relative sliding between the sub-magnetic component and the sub-magnetic connection part, and between the screw connection part and the screw end, ensuring efficient power transmission.

[0017] The magnetically driven inner disc lifting device described above also includes a heating element, which is located above the drive assembly. The heating element has a first cavity and a temperature sensing element, and the mother magnetic component is located in the first cavity. The heating element integrates heating and structural support functions. The first cavity is used to accommodate and position the mother magnetic component, enabling high spatial integration between the drive component and the heating system, improving the overall compactness of the device. The temperature sensing element monitors the temperature in real time and works with the control system to achieve precise temperature control. The mother magnetic component is placed above the heating element, away from the high-temperature core area, to avoid magnetic attenuation due to prolonged heating, ensuring long-term stable operation of the magnetic drive. This integrated design achieves spatial coordination of heating, sensing, and drive, optimizing thermal management and structural layout.

[0018] As described above, the magnetically driven inner disc lifting device has a first step and a second step at the top of the first outer cylinder, and a sealing ring on the outer side of the top of the first sleeve. The sealing ring is located between the first step and the second step and abuts against the first outer cylinder. By setting the first step and the second step distributed vertically at the top of the first outer cylinder, an annular limiting groove is formed to accommodate and fix the sealing ring. The sealing ring is installed on the outer periphery of the top of the first sleeve. When the first sleeve is raised or lowered, the sealing ring is stably restricted between the two steps, and the sealing ring maintains radial sealing contact. This structure achieves a seal between the lifting rod assembly and the first outer cylinder, effectively preventing liquid from leaking downwards from the inner disc area to the cavity where the deceleration rotating component, sub-magnetic component, and other transmission components are located. This further improves the waterproof performance and safety of the device. Moreover, the sealing ring abuts tightly against the inner wall of the first outer cylinder, forming a reliable sealing interface. Even during frequent raising and lowering movements, it can maintain a good sealing effect, extend the service life of internal components, and meet the long-term use requirements of cooking equipment in high-temperature and high-humidity environments.

[0019] This utility model also provides a cooking device, including a pot body and an inner plate lifting device as described above. The driving component is located outside the pot body, and the inner plate is located inside the pot body. The inner plate is sleeved on the lifting rod assembly and abuts against the lifting rod assembly. When the driving component drives the lifting rod assembly to rise and fall, the lifting rod assembly drives the inner plate to rise and fall within the pot body. This cooking device achieves automatic lifting and lowering of the inner plate through magnetic drive, completely solving the problems of poor water resistance, difficulty in disassembly and cleaning, and high maintenance costs caused by the integration of the motor and push rod in traditional mechanical transmission. The separate design of the external driving component and the internal lifting rod assembly allows for easy separation of water-contacting parts during cleaning, improving hygiene and user experience. At the same time, the modular structure facilitates functional expansion and multi-model adaptation, making it suitable for various smart kitchen appliance scenarios such as lifting hot pots and low-sugar rice cookers, with broad application prospects and industrialization value.

[0020] Compared with existing technologies, the beneficial effects of this technical solution are as follows: This device utilizes the principle of opposite poles attracting to achieve power transmission. The drive motor and the main magnetic component are located in the drive assembly, while the secondary magnetic component and its linked lifting structure are housed inside the outer cylinder. The two components achieve non-contact transmission through the principle of opposite poles attracting. When the drive motor starts, its output drives the main magnetic component to rotate. The main magnetic component, through magnetic force, drives the coaxially mounted secondary magnetic component to rotate synchronously. The secondary magnetic component drives the transmission connector to rotate, and then, via bearings and the first rod assembly, converts the rotational motion into axial linear motion, pushing the first sleeve to rise and fall, thereby causing the inner disc to complete the lifting and lowering action. This design effectively achieves physical isolation between the drive unit and the water-contaminated area, improving waterproof and leakage-proof performance, while also facilitating the cleaning and maintenance of the inner disc.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional structural view of the present invention; Figure 2 This is a bottom-view perspective view of the structure of this utility model; Figure 3 This is an exploded perspective view of an embodiment of the present invention employing a transmission connecting component; Figure 4 This is a top view of an embodiment of the present invention using a transmission connector after removing the inner disc; Figure 5 Figure 4 Cross-sectional view of AA; Figure 6 yes Figure 5 A partial view of A in the middle; Figure 7 This is an exploded perspective view of an embodiment of the present invention employing a deceleration rotating component; Figure 8 yes Figure 7 A partial view of B in the middle; Figure 9 This is a top view of an embodiment of the present invention using a deceleration rotating component, after removing the inner disk; Figure 10 yes Figure 9 Cross-sectional view of BB; Figure 11 This is a top view of an embodiment of the present invention using a deceleration rotating component, after removing the inner plate and the pot body; Figure 12 yes Figure 11 Cross-sectional view of CC; Figure 13 This is a three-dimensional view of the structure of the present invention after removing the inner plate and the pot body from an embodiment of the deceleration rotating component; Figure 14 This is a bottom view of the combination of the limiting cylinder and the limiting component of this utility model; Figure 15 yes Figure 14 Cross-sectional view of DD; Figure 16 This is a three-dimensional structural view of the deceleration rotating component of this utility model; Figure 17 Exploded perspective view of the deceleration rotating component of this utility model; Figure 18 This is a three-dimensional structural view of the drive component of this utility model. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] When ordinal numbers such as "first" and "second" are mentioned in the embodiments of this application, unless they actually express the meaning of order according to the context, they should be understood as being used only for distinction.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] Example: This example discloses a magnetically driven inner plate lifting device and a cooking appliance, relating to the field of cooking appliance technology. For example... Figure 1-18The magnetically driven inner disc lifting device shown includes an inner disc 100, a drive assembly 1 disposed outside the inner disc 100, and a lifting rod assembly 2 connected to the inner disc 100. The device is characterized in that the inner disc lifting device further includes an outer cylinder 3 sleeved outside the lifting rod assembly 2. The drive assembly 1 includes a drive motor 11 and a female magnetic component 12 disposed on the drive motor 11. The lifting rod assembly 2 includes a first sleeve 21 abutting against the inner disc 100, a first rod assembly 22 disposed within the first sleeve 21, a bearing 23, a transmission connector 27 connected to the first rod assembly 22, and a female magnetic component 25 connected to the transmission connector 27 and cooperating with the female magnetic component 12 for rotation. The first rod assembly 22 abuts against the first sleeve 21. The bearing 23 is disposed between the first rod assembly 22 and the female magnetic component 25. The female magnetic component 12 drives the female magnetic component 25 to rotate. The bearing 23 cooperates with the transmission connector 27 to cause the first rod assembly 22 to drive the first sleeve 21 to lift. This device utilizes the principle of opposite magnetic poles attracting to achieve power transmission. The drive motor 11 and the female magnetic component 12 are located in the drive assembly 1, while the female magnetic component 25 and its linked lifting structure are located inside the outer cylinder 3. The two achieve non-contact transmission through the principle of opposite poles attracting. When the drive motor 11 starts, its output drives the female magnetic component 12 to rotate. The female magnetic component 12, through magnetic force, drives the coaxially arranged female magnetic component 25 to rotate synchronously. This rotational motion is then converted into axial linear motion via the bearing 23 and the first rod assembly 22, pushing the first sleeve 21 to rise and fall, thereby causing the inner disc 100, which is in contact with it, to complete the lifting and lowering action. This design effectively achieves physical isolation between the drive unit and the water-contaminated area, improving waterproof and leakage-proof performance, while also facilitating the cleaning and maintenance of the inner disc 100.

[0028] In one application scenario, this magnetically driven inner plate lifting device is used in an intelligent lifting hot pot device. The drive assembly 1 is installed on the outer support at the bottom of the pot body 200, and the lifting rod assembly 2 is located in the inner cavity of the pot body 200 from bottom to top, with its top fixedly abutting against the bottom of the liftable inner plate. After the drive motor 11 is started, the female magnetic component 12 rotates under the drive of the motor, and the rotating magnetic field generated penetrates the bottom of the stainless steel pot body 200 and acts on the internal female magnetic component 25. Synchronous rotation drive is achieved by utilizing the attraction between opposite poles. Since there is no physical shaft penetrating the pot body 200, the risks of water leakage and electric leakage caused by poor sealing in traditional structures are avoided. Moreover, the entire lifting process is smooth and quiet. Users can automatically raise or lower the inner plate 100 through the control panel commands at different stages such as adding soup, cooking, and removing the pot. The operation is convenient and safe.

[0029] Furthermore, such as Figure 6 and Figure 12As shown, the first sleeve 21 has an opening, and the first rod assembly 22 includes a connector 221 disposed inside the first sleeve 21 and abutting against the opening, and a screw 222 disposed inside the connector 221. The connector 221 and the screw 222 are threadedly engaged. A limiting cylinder 26 is provided outside the first sleeve 21, and the limiting cylinder 26 is used to limit the connector 221. Through the threaded engagement between the screw 222 and the connector 221, and the circumferential limitation of the connector 221 by the limiting sleeve 26, the rotation of the screw can be converted into axial linear motion of the connector 221 and the first sleeve 21, thereby realizing the lifting and lowering of the inner disk 100. This transmission structure is simple and reliable, and can stably maintain the position of the inner disk 100 in the power-off or stop state, preventing the slippage caused by the load. The opening and the limiting sleeve 26 work together to ensure that the connector 221 only moves in a straight line and does not rotate with the screw, improving the smoothness and guiding accuracy of the lifting and lowering process.

[0030] In one embodiment, the edge of the opening is smoothed to reduce friction between the connector 221 and the first sleeve 21. The surface of the screw 222 is machined with high-precision threads, resulting in a small thread fit clearance between the screw 222 and the connector 221, ensuring the smoothness of the lifting process of the first rod assembly 22. The inner wall of the limiting cylinder 26 is provided with a guide groove, and the connector 221 is provided with a corresponding guide strip. The guide strip is embedded in the guide groove, further ensuring that the connector 221 can only move up and down axially without rotation, thus limiting the movement of the connector 221.

[0031] Optionally, the guide groove extends axially along the first sleeve 21 to allow the connector 221 to move axially without circumferential rotation during lifting. The design of the connector 221 allows the first sleeve 21 to slide only axially and not rotate with the screw 222. The deceleration rotating component 24 rotates under the drive of the sub-magnet 25, and the deceleration rotating component 24 further drives the screw 222 to rotate. Since the connector 221 is restricted from rotation by the limiting sleeve 26, the threaded engagement between the connector 221 and the screw 222 converts the rotational motion into vertical axial displacement, thereby pushing the first sleeve 21 to lift as a whole, ensuring a smooth lifting process without off-center load.

[0032] In actual operation, the screw 222 is driven to rotate by the deceleration rotating component 24. When the screw 222 rotates, the connecting component 221 is limited, and the threaded pair converts the rotational motion into axial displacement, pushing the first sleeve 21 to move upward or downward as a whole. This transmission mechanism can maintain its current position after the motor stops supplying power, and can prevent the inner plate 100 from automatically sinking under gravity without the need for an additional braking device. It is particularly suitable for the use of "suspended cooking" or "high-position eating" in hot pot equipment, improving the safety and user experience.

[0033] Furthermore, such as Figure 6 As shown, the inner disc lifting device also includes a limiting member 223, which is located below the limiting cylinder 26. The limiting member 223 is detachably connected to the limiting cylinder 26 and forms a first inner cavity 224. The bearing 23 is sleeved on the screw 222 and is located in the first inner cavity 224. The limiting member 223 and the limiting cylinder 26 form a closed first inner cavity 224, which is used to fix and support the bearing 23, enabling the bearing 23 to support the rotational movement of the screw 222 while limiting its axial displacement. This structure effectively improves the rotational coaxiality and operational stability of the screw 222, reduces vibration and wear during transmission, and the detachable design of the limiting member 223 facilitates the replacement and maintenance of the bearing 23, extending the service life of the entire lifting system and reflecting good maintainability and modular design concepts.

[0034] In one embodiment, the limiting member 223 and the limiting cylinder 26 are connected by bolts, which facilitates disassembly and installation, and makes it easy to maintain and replace the bearing 23. The size of the first inner cavity 224 matches the outer diameter of the bearing 23, which can stably support and fix the bearing 23 and prevent the bearing 23 from axially moving during operation. The bearing 23 is a high-precision ball bearing, which has the characteristics of low friction coefficient and high rotational accuracy, ensuring the smooth rotation of the screw 222.

[0035] Optionally, the limiting member 223 is assembled with the limiting cylinder 26 via a threaded connection, snap-fit ​​structure, or fastener to form a closed or semi-closed first inner cavity 224, used to accommodate and fix the bearing 23, preventing axial movement or radial displacement during operation. The bearing 23 is a deep groove ball bearing or thrust bearing, installed in the middle or end of the screw 222, with its outer ring fixed to the inner wall of the first inner cavity 224, and its inner ring interference-fitted or keyed to the screw 222, ensuring that the screw 222 can rotate freely while the connecting member 221 remains stationary. This structure not only improves transmission accuracy but also enhances the system's vibration resistance and long-term operational stability. Furthermore, the detachable limiting member 223 facilitates later maintenance and bearing replacement, improving the maintainability of the device.

[0036] Furthermore, such as Figure 7-12 As shown, the inner disc lifting device also includes a reduction rotating component 24, which comprises a first transmission component 241, a gear set 242, and a second transmission component 243. The first transmission component 241 and the second transmission component 243 are respectively connected to the gear set 242. The first transmission component 241 is interference-fitted with the screw 222, and the second transmission component 243 is interference-fitted with the sub-magnet component 25. The reduction rotating component 24 adjusts its speed and output torque through the gear set 242, enabling the device to provide sufficient lifting driving force even with a smaller power motor, adapting to different load conditions. This structure solves the problem of stalling or unstable lifting that easily occurs when a small motor drives a large load, improving the system's adaptability and operational stability. The interference fit ensures reliable power transmission, avoids slippage or loosening, and further guarantees the durability of each component for long-term use.

[0037] Optionally, by setting up a second transmission component 243, a gear set 242, and a first transmission component 241, a multi-stage reduction effect is achieved. Multi-stage reduction allows for more precise adjustment of speed and torque, enabling the lifting speed and force of the first sleeve 21 to better meet actual needs. Multi-stage reduction also allows for speed and torque adjustment over a wider range, improving the adaptability and flexibility of the device. The multi-stage transmission design distributes the power transmission process across multiple transmission mechanisms and gears, avoiding excessive load on any single component. This reduces wear on each component, extends its service life, and improves the reliability and stability of the entire reduction rotating component 24.

[0038] In one embodiment, multiple gears in gear set 242 share the task of transmitting power, reducing the risk of damage to individual gears. This layered structure makes better use of the space within the second outer cylinder 32, allowing for a more compact arrangement of transmission mechanisms and gear sets based on space size and shape. This results in a more compact structure for the entire deceleration rotating component 24, enabling complex transmission functions within a limited space. This facilitates miniaturization and is suitable for applications with high space requirements. Since the deceleration rotating component 24 consists of multiple relatively independent transmission mechanisms, if one mechanism malfunctions, only that mechanism needs to be repaired or replaced without affecting other parts. This significantly reduces maintenance costs and difficulty, improving the maintainability of the equipment. For example, if the second transmission component 243 malfunctions, only the second transmission component 243 needs to be addressed, without requiring large-scale disassembly and repair of the entire deceleration rotating component 24.

[0039] like Figure 8 and Figures 16-17 As shown, the gear set 242 of this embodiment includes a first gear carrier 2411 and a second gear carrier 2422 arranged sequentially from top to bottom. The bottom of the first gear carrier 2411 is provided with a plurality of first input shafts 2412 arranged in a ring array. Each of the first input shafts 2412 is provided with a first planetary gear 2421. The bottom of the second gear carrier 2422 is provided with a plurality of second input shafts 2423 arranged in a ring array. Each of the second input shafts 2423 is provided with a second planetary gear 2424. The second transmission member 243 includes a first sun gear that meshes with a plurality of corresponding second planetary gears 266. The top of the second gear carrier 2422 is provided with a second sun gear 2431 that meshes with a plurality of corresponding first planetary gears 263.

[0040] Preferably, the first sun gear in the second transmission member 243 starts to rotate, which is the starting source of power for the entire reduction gear set. The rotation of the first sun gear is driven by the sub-magnet member 25, which introduces power into the gear set 242.

[0041] Furthermore, the first sun gear meshes with multiple second planetary gears 2424 arranged in a ring array on the second input shaft 2423. When the first sun gear rotates as the driving member, it drives the second planetary gears 2424 to rotate around their own second input shaft 2423. While rotating, the second planetary gears 2424 also revolve around the first sun gear, thereby driving the second gear carrier 2422 to rotate. When the second gear carrier 2422 rotates, the second sun gear 2431 at its top rotates accordingly. The second sun gear 2431 meshes with multiple first planetary gears 2421 arranged in a ring array on the first input shaft 2412. The rotation of the second sun gear 2431 drives the first planetary gears 2421 to rotate around their own first input shaft 2412. While rotating, the first planetary gears 2421 also revolve around the second sun gear 2431, ultimately driving the first gear carrier 2411 to rotate. The first gear carrier 2411 outputs the power after two stages of reduction and torque amplification to the subsequent transmission mechanism (such as the first transmission component 241), thereby driving the first sleeve 21 to perform lifting and lowering movements.

[0042] A larger reduction ratio can be achieved through two-stage planetary gear transmission. The two-stage transmission can further reduce the output speed and increase the output torque by reasonably designing the gear ratio of each stage. This allows the device to obtain a lower output speed and a greater output torque when the input speed is high, better meeting the force and speed requirements of the first sleeve 21 during lifting.

[0043] Although two-stage planetary gear transmission increases the number of transmission stages, the overall transmission efficiency remains high because each planetary gear set can achieve load balancing and efficient transmission. Multiple planetary gears participate in the transmission simultaneously, distributing the load evenly, reducing the force on individual gears, and lowering energy loss. The efficiency advantage of planetary gear transmission is obvious, and it can more effectively transfer the input energy to the output end.

[0044] Due to the compact structure of planetary gear transmission, the entire gear set 242 still has advantages in space utilization. The two-stage planetary gear set can be reasonably arranged in the limited axial and radial space, and the size of the device will not increase significantly due to the increase in the number of transmission stages. This compact structural design is conducive to the miniaturization and integration of the device, and is suitable for application scenarios with strict space requirements.

[0045] Each stage of planetary gear transmission achieves load balancing, distributing the load evenly across all planetary gears. The two-stage transmission further enhances this load balancing effect, enabling the entire gear set 242 to withstand greater loads. At the same time, because the stress on each gear is reduced, the risk of gear wear and damage is lowered, improving the reliability and service life of the entire gear set 242. Even under long-term, high-load working conditions, the device can still operate stably.

[0046] The multi-stage meshing process of the two-stage planetary gear transmission complements and buffers each other, making the transmission process smoother, with less vibration and noise. The multi-stage transmission can better absorb and disperse the impact and vibration during the transmission process, improving the operating quality of the equipment and the user experience.

[0047] In other embodiments, there are multiple second gear carriers 2422, which are stacked on top of each other. The second sun gear 2431 of the topmost second gear carrier 2422 meshes with multiple corresponding first planetary gears 2421. The second sun gear 2431 of the adjacent second gear carrier 2422 located below it meshes with multiple corresponding second planetary gears 2424. The multiple second planetary gears 2424 of the bottommost second gear carrier 2422 mesh with the first sun gear.

[0048] The first sun gear rotates, meshing with multiple second planetary gears 2424 on the bottommost second gear carrier 2422. This rotation causes the second planetary gears 2424 to rotate around their own second input shaft 2423. While rotating, the second planetary gears 2424 also revolve around the first sun gear, thus rotating the bottommost second gear carrier 2422. As the bottommost second gear carrier 2422 rotates, its top second sun gear 2431 rotates accordingly. This second sun gear 2431 meshes with multiple second planetary gears 2424 on the adjacent lower second gear carrier 2422, driving these second planetary gears 2424. Furthermore, these second planetary gears 2424 rotate and revolve, further driving the connected second gear carrier 2422 to rotate, and so on. Power is transmitted upwards sequentially through each layer of the second gear carrier 2422. The second sun gear 2431 of the topmost second gear carrier 2422 meshes with multiple corresponding first planetary gears 2421. The rotation of the second sun gear 2431 drives the first planetary gears 2421 to rotate around their own first input shaft 2412. The first planetary gears 2421 revolve and drive the first gear carrier 2411 to rotate. Finally, the first gear carrier 2411 outputs power to the subsequent transmission mechanism (such as the first transmission component 241), driving the first sleeve 21 to perform lifting and lowering movements.

[0049] The number of transmission stages is further increased by the multiple stacked second gear carriers 2422, which can achieve a larger reduction ratio. Each additional second gear carrier 2422 and its corresponding planetary gear transmission can further reduce the speed and increase the torque on the original basis. This allows the device to obtain a lower output speed and a greater output torque under a certain input speed, so as to meet the force and speed requirements of the first sleeve 21 under different working conditions.

[0050] The design of multiple second gear carriers 2422 provides more flexibility in the design of the transmission ratio. By adjusting the number of teeth of the gears in different second gear carriers 2422, the reduction ratio of each stage of transmission can be precisely controlled, thereby optimizing the transmission ratio of the entire gear set 2412. According to the actual application requirements, the parameters of each stage of transmission can be flexibly configured to achieve the best deceleration and torque increase effect.

[0051] In other embodiments, the gear set 242 includes a first gear carrier 2411, the bottom of which is provided with a plurality of first input shafts 2412 arranged in a ring array, each of the first input shafts 2412 being provided with a first planetary gear 2421, and the second transmission member 243 including a first sun gear that meshes with the plurality of corresponding first planetary gears 2421.

[0052] Specifically, the first sun gear in the second transmission component 243 begins to rotate under the drive of the sub-magnet component 25. As the driving component, the first sun gear introduces power into the gear set 242. The rotating first sun gear meshes with multiple first planetary gears 2421 arranged in a ring array on the first input shaft 2412. Due to the rotation of the first sun gear, the meshing first planetary gears 2421 are driven to rotate around their own first input shaft 2412. While rotating on their own axes, the first planetary gears 2421 also revolve around the first sun gear.

[0053] Specifically, the revolution of the first planetary gear 2421 drives the rotation of the first gear carrier 2411. The first gear carrier 2411 outputs the reduced and increased torque power to the first transmission component 241, which in turn drives the first sleeve 21 to perform lifting and lowering movements. Planetary gear transmission has a large transmission ratio, which can achieve a large reduction in a small space. Multiple first planetary gears 2421 participate in the transmission simultaneously, which can share the load and improve the transmission efficiency. By reasonably designing the tooth ratio of the first sun gear and the first planetary gear 2421, the reduction ratio can be precisely adjusted to convert the input high-speed, low-torque power into low-speed, high-torque power, which meets the power requirements of the first sleeve 21 during lifting and lowering.

[0054] Preferably, the gear set 242 using planetary gear transmission has a very compact structure. Multiple first planetary gears 2421 are arranged in a ring array around the first sun gear. This layout makes the entire gear set 242 relatively small in both radial and axial dimensions. Within the limited space of the second outer cylinder 32, space can be effectively utilized to achieve complex transmission functions. This is beneficial for the miniaturization design of the device and is suitable for occasions with high space requirements.

[0055] Multiple first planetary gears 2421 mesh with the first sun gear simultaneously, distributing the load evenly across each gear. This load balancing method reduces the stress on each gear, decreases the risk of wear and damage, and improves the service life of the gears and the reliability of the entire gear set 242.

[0056] Since multiple first planetary gears 2421 participate in the transmission simultaneously, their meshing process complements and buffers each other, making the transmission process smoother and reducing vibration and noise. This is very important for lifting devices that require smooth operation, and can improve the working quality and user experience of the equipment.

[0057] The gear set 242 has a relatively modular structure. Components such as the first gear carrier 2411 and the first planetary gear 2421 can be installed and disassembled as a whole. If a component fails, it is easy to repair or replace it individually, reducing maintenance costs and difficulty and improving the maintainability of the equipment. The aforementioned single-stage, double-stage, or multi-stage gear set 242 can be selected according to actual needs, and a suitable design can be chosen based on actual requirements.

[0058] Optionally, the gear set 242 is made of high-strength alloy material, precision machined and heat-treated, possessing high hardness and wear resistance, and capable of withstanding large torque transmission. The gear parameters of the first transmission component 241 and the second transmission component 243 are matched with the gear set 242, ensuring smooth and accurate transmission. By rationally designing the transmission ratio of the gear set 242, the high-speed rotation of the sub-magnet component 25 can be converted into the low-speed rotation of the screw 222, while increasing the torque, enabling the first rod assembly 22 to drive the heavier inner disc 100 to rise and fall stably.

[0059] Furthermore, referring to Figure 6 The outer cylinder 3 includes a first outer cylinder 31 and a second outer cylinder 32 disposed outside the limiting cylinder 26. The first outer cylinder 31 is disposed above the second outer cylinder 32. The first rod assembly 22 is disposed inside the limiting cylinder 26. The bearing 23, the deceleration rotating component 24, and the sub-magnetic component 25 are all disposed inside the first outer cylinder 31. The outer cylinder 3 serves as an integral support structure, providing protection and positioning for the internal transmission components. The first outer cylinder 31 covers the lifting path, and the second outer cylinder 32 accommodates the sub-magnetic component 25, the deceleration rotating component 24, and the bearing 23. The first outer cylinder 31 and the second outer cylinder 32 form a closed, non-water-immersed transmission cavity, which can prevent liquid intrusion, enhance structural rigidity, and prevent foreign objects from entering. In addition, this split-type outer cylinder 3 design takes into account both functional zoning and assembly convenience, which helps to achieve a coordinated layout of the drive module and the lifting module, improving the overall structural compactness and safety.

[0060] In one embodiment, the outer cylinder 3 is made of heat-insulating material, which can effectively block the transfer of internal heat to the outside and avoid affecting external components such as the drive assembly 1. The first outer cylinder 31 and the second outer cylinder 32 can be detachably assembled by welding, snap-fitting, or threaded connection, which facilitates assembly and disassembly. The inner wall of the outer cylinder 3 is smooth, which reduces friction with internal components and also plays a role in dust and moisture prevention, protecting internal components from the influence of the external environment.

[0061] The outer cylinder 3 serves as an overall support and protection structure, playing a role in fixing and guiding. The first outer cylinder 31 is located at the top and is used to accommodate the sub-magnetic component 25, the deceleration rotating component 24 and the bearing 23, and forms a magnetic coupling space with the mother magnetic component 12 of the drive assembly 1. Its material can be non-magnetic stainless steel or engineering plastic to reduce magnetic resistance and improve transmission efficiency. The second outer cylinder 32 extends downward to cover the lifting path of the limiting cylinder 26 and the first rod group 22, providing external protection and preventing foreign objects from entering.

[0062] In another embodiment, the outer cylinder 3 is made of non-magnetic stainless steel, which does not affect magnetic field penetration and has good corrosion resistance and structural strength. The first outer cylinder 31 and the second outer cylinder 32 are connected by a snap-fit ​​structure, which facilitates disassembly and maintenance. The second outer cylinder 32 is fixed to the inner bottom of the pot body 200, so that the entire outer cylinder 3 serves as the guide and load-bearing body of the lifting system, ensuring that the first sleeve 21 moves accurately in the vertical direction. The deceleration rotating component 24 and the sub-magnetic component 25 are located in the upper cavity, away from liquids that may seep in, further improving the reliability of the system. This split design also facilitates modular assembly on the production line and improves manufacturing efficiency.

[0063] Furthermore, such as Figure 18 As shown, the drive motor 11 is provided with a motor connecting shaft 111, and the female magnetic component 12 is provided with a female magnetic connecting part 121. The motor connecting shaft 111 and the female magnetic connecting part 121 are interference-fitted. The interference fit enables efficient torque transmission between the drive motor 11 and the female magnetic component 12. It has a simple structure, is easy to assemble, and ensures reliable connection during operation without the need for additional fasteners. Furthermore, the interference fit has good vibration resistance and anti-loosening ability, making it suitable for working environments with frequent start-stop cycles. It ensures that the female magnetic component 12 rotates synchronously with the drive motor 11, maintaining a stable magnetic field output and providing a reliable power source for magnetic coupling transmission.

[0064] In one embodiment, the motor connecting shaft 111 is the output shaft of the drive motor 11, and its end shape matches the inner hole of the female magnetic connecting part 121, for example, a circular or polygonal cross section. The interference fit between the two achieves reliable torque transmission. The female magnetic connecting part 121 is a metal sleeve structure integrally formed or embedded in the female magnetic component 12, which has good mechanical strength and concentricity. This connection method does not require additional fasteners, is simple to assemble, and can effectively prevent loosening or slippage during operation.

[0065] In other embodiments, the connection between the female magnetic connector 121 and the female magnetic component 12, and the connection between the motor connecting shaft 111 and the female magnetic connector 121, can also be enhanced by key connection, pin connection or adhesive bonding. The female magnetic component 12 is generally ring-shaped or cylindrical, and its magnetic poles are alternately distributed along the circumference to generate a stable rotating magnetic field.

[0066] Optionally, the motor connecting shaft 111 is a cylindrical steel shaft, and the female magnetic connecting part 121 is a metal nest with an inner diameter slightly smaller than the shaft diameter. During assembly, an interference fit is achieved through a cold pressing process. This connection method facilitates automated assembly in mass production, ensuring a robust connection that prevents relative slippage even during frequent forward and reverse rotation of the motor. The female magnetic component 12 is a ring magnet with alternating magnetic poles along the circumference, ensuring a uniform rotating magnetic field and forming efficient magnetic coupling with the internal sub-magnetic components.

[0067] Furthermore, such as Figure 18 As shown, the drive motor 11 and the female magnetic component 12 are not coaxially arranged, while the female magnetic component 12, the first rod group 22, the bearing 23, the reduction rotating component 24, and the daughter magnetic component 25 are coaxially arranged. The non-coaxial arrangement of the drive motor 11 and the female magnetic component 12 allows for flexible placement of the drive motor 11, saving installation space. The coaxial arrangement of components such as the female magnetic component 12 and the first rod group 22 ensures the symmetry and uniformity of magnetic force transmission, reduces additional forces and vibrations caused by eccentricity, and improves the stability and reliability of the device operation.

[0068] Optionally, the output shaft centerline of the drive motor 11 and the rotation centerline of the female magnetic component 12 can be parallel but not coincident, i.e., a lateral drive layout is adopted, which allows the motor to be installed laterally on the side of the pot body 200, saving vertical space and adapting to the needs of compact kitchen appliance structures. The female magnetic component 12 is driven to rotate through the motor connecting shaft 111, and the rotating magnetic field generated by it penetrates the wall of the pot body 200 and acts on the coaxially arranged sub-magnetic component 25 inside, realizing magnetic coupling transmission. Since the key rotating components such as the sub-magnetic component 25, the deceleration rotating component 24, and the screw 222 are all arranged coaxially, the centering of power transmission and the smoothness of operation are ensured, and vibration or wear caused by eccentricity is avoided. This non-coaxial drive design takes into account both space utilization efficiency and transmission performance.

[0069] In one embodiment, the drive motor 11 is horizontally mounted on the side bracket of the pot body 200, and the rotational power is transmitted to the vertical female magnet 12 through the L-shaped transmission arm to achieve spatial turning. This layout avoids the motor occupying too much space in the vertical direction, and is especially suitable for small rice cookers or tabletop hot pot products with limited height. Although the motor and the female magnet 12 are not coaxial, the female magnet 12 and the internal transmission chain are strictly coaxial to ensure symmetrical distribution of magnetic lines of force, smooth transmission without off-center load, and effective suppression of vibration and noise.

[0070] Furthermore, both the mother magnetic component 12 and the daughter magnetic component 25 are circular magnets, as shown in the reference. Figures 3 to 6 The transmission connector 27 is provided with a screw connection part and a sub-magnetic connection part. The screw connection part and the sub-magnetic connection part are opposite to each other and coaxially arranged. The sub-magnetic component 25 is sleeved on the sub-magnetic connection part and has an interference fit with the sub-magnetic connection part. The screw connection part is sleeved on the end of the screw 222 and has an interference fit with the end of the screw 222. The circular magnet has a uniform magnetic force distribution and can generate a stable magnetic field, ensuring the efficiency and stability of magnetic force transmission between the mother magnet 12 and the sub-magnetic component 25. Moreover, the magnet is made of high-performance permanent magnet material, which has strong magnetic force and good magnetic stability, and can maintain the magnetic force without decay for a long time, ensuring the service life of the device. The shape of the circular magnet is adapted to the structure of the transmission connector, so that the magnetic force action surface is uniformly corresponding. The relative arrangement of the screw connection part and the sub-magnetic connection part on the transmission connector makes the transmission path more direct and simple. The interference fit ensures that there is no relative sliding between the sub-magnetic component and the sub-magnetic connection part, and between the screw connection part and the screw end, ensuring efficient power transmission.

[0071] The circular magnet can be made of high-performance permanent magnet materials, such as neodymium iron boron (NdFeB) or ferrite magnets. These magnets have high magnetic energy product and strong magnetic field penetration capability. The mother magnet 12 and the daughter magnet 25 are arranged opposite to each other, and the distance between them is determined by the wall thickness of the pot body 200. The magnetic pole arrays of the mother magnet 12 and the daughter magnet 25 correspond to each other and form a synchronously rotating magnetic coupling torque when rotating. The circular structure of the mother magnet 12 and the daughter magnet 25 is conducive to the uniform distribution of the magnetic field, reducing torque fluctuation and improving the stability of operation.

[0072] In some embodiments, the magnet surface may be treated with an anti-corrosion coating (such as a Ni-Cu-Ni coating) to meet the requirements of long-term use in humid environments.

[0073] Furthermore, it also includes a heating element 4, which is disposed above the drive assembly 1. The heating element has a first cavity 41 and a temperature sensing element 42, and the female magnetic component 12 is disposed in the first cavity 41. The heating element 4 integrates the dual functions of heating and structural support. The first cavity 41 is used to accommodate and position the female magnetic component 12, so that the drive component and the heating system are highly integrated in space, improving the overall compactness. The temperature sensing element 42 monitors the temperature in real time and works with the control system to achieve precise temperature control. The female magnetic component 12 is placed above the heating element 4, away from the high-temperature core area, to avoid magnetic attenuation due to long-term heating and ensure long-term stable operation of the magnetic transmission. This integrated design realizes spatial coordination of heating, sensing and driving, and optimizes thermal management and structural layout.

[0074] Optionally, the heating element 4 is electrically heated, which can provide the heat required for the cooking process. The size of the first cavity 41 matches the female magnetic component 12, so that the female magnetic component 12 can be stably installed in it, while also reducing heat loss. The temperature sensing element 42 is a high-precision thermocouple, which can monitor the temperature of the heating element 4 in real time and feed the temperature signal back to the control system to achieve precise control of the heating process and avoid the temperature from being too high or too low, thus affecting the cooking effect.

[0075] In one embodiment, the heating element 4 is an electric heating plate or an IH coil support structure, used to heat the food in the pot body 200 and the inner plate 100. The first cavity 41 is an annular cavity located above the middle of the heating element 4, used to accommodate the female magnetic component 12, placing it near the heating area but not in direct contact with the high-temperature area to prevent the magnet from demagnetizing due to overheating. The temperature sensing element 42 can optionally be an NTC thermistor or a thermocouple. The temperature sensing element 42 is installed on the heating element 4 and abuts against the bottom of the pot, used to monitor the temperature in real time and feed the signal back to the control system to achieve closed-loop temperature regulation. The female magnetic component 12 is placed in the first cavity 41, which facilitates installation and positioning, and also utilizes the structure of the heating element 4 for axial limiting and radial support, improving the overall integration. This layout achieves spatial coordination between the heating system and the lifting drive system, optimizing the overall structural layout.

[0076] Furthermore, such as Figure 3 and Figure 6As shown, the top of the first outer cylinder 31 is provided with a first step and a second step, and the outer side of the top of the first sleeve 21 is provided with a sealing ring 33. The sealing ring 33 is located between the first step and the second step, and the sealing ring 33 abuts against the first outer cylinder 31. By setting a first step and a second step distributed vertically on the top of the first outer cylinder 31, an annular limiting groove is formed to accommodate and fix the sealing ring 33. The sealing ring 33 is installed on the outer periphery of the top of the first sleeve 21. When the first sleeve 21 is raised or lowered, the sealing ring 33 is stably restricted between the two steps, and the sealing ring 33 maintains radial sealing contact. This structure achieves the sealing between the lifting rod assembly 2 and the first outer cylinder 31, effectively preventing liquid from leaking downward from the inner plate 100 area to the cavity where the transmission components such as the deceleration rotating component 24 and the sub-magnet component 25 are located, further improving the waterproof performance and safety of the device. Moreover, the sealing ring 33 is in close contact with the inner wall of the first outer cylinder 31 to form a reliable sealing interface, which can maintain a good sealing effect even in frequent lifting and lowering movements, extend the service life of internal components, and meet the long-term use requirements of cooking equipment in high temperature and high humidity environments.

[0077] Optionally, the sealing ring 33 is made of high-temperature resistant silicone material, which has good elasticity and aging resistance. The gap between the first step and the second step is slightly smaller than the cross-sectional diameter of the sealing ring 33, forming a pre-compressed state after assembly to ensure a tight fit with the inner wall of the first outer cylinder 31 at all times. This design is particularly suitable for kitchen appliances that require full-machine rinsing or steam cleaning, significantly improving product durability and safety.

[0078] This embodiment also provides a cooking device, see reference. Figure 1 and Figure 2 The cooking device includes a pot body 200 and an inner plate lifting device as described above. The drive assembly 1 is located outside the pot body 200, and the inner plate 100 is located inside the pot body 200. The inner plate 100 is sleeved on the lifting rod assembly 2 and abuts against the lifting rod assembly. When the drive assembly 1 drives the lifting rod assembly 2 to rise and fall, the lifting rod assembly 2 drives the inner plate 100 to rise and fall within the pot body 200. This cooking device achieves automatic lifting and lowering of the inner plate 100 through magnetic drive, completely solving the problems of poor water resistance, difficulty in disassembly and cleaning, and high maintenance costs caused by the integration of the motor and push rod in traditional mechanical transmission. The separate design of the external drive assembly 1 and the internal lifting rod assembly 2 allows for easy separation of water-contacting parts during cleaning, improving hygiene and user experience. At the same time, the modular structure facilitates functional expansion and multi-model adaptation, making it suitable for various smart kitchen appliance scenarios such as lifting hot pots and low-sugar rice cookers, with broad application prospects and industrialization value.

[0079] In one embodiment, the pot body 200 is made of high-temperature resistant ceramic material and coated with a non-stick coating, which makes it easy to clean and prevents food from sticking. The inner plate 100 is provided with a buffer pad at the contact point with the lifting rod assembly 2 to reduce the impact and noise during the lifting process. When the inner plate 100 is raised and lowered within the pot body 200, the contact position and distance between the inner plate 100 and the food can be adjusted according to different cooking needs to achieve diversified cooking methods and improve the practicality and flexibility of the cooking equipment.

[0080] Optionally, in the application of a lifting hot pot, the user can control the inner plate 100 to rise to a high position via a touch panel to facilitate picking up ingredients, and then lower it to resume boiling and cooking. In a low-sugar rice cooker, the inner plate 100 rises to separate rice from water, thus completing the cooking of low-sugar rice.

[0081] Optionally, the cooking device can be a lifting hot pot, a sugar-reducing rice cooker, a multi-functional steamer, or other intelligent kitchen appliance that requires automatic lifting of the inner pot or inner plate 100. The pot body 200 adopts a double-layer or multi-layer composite structure, wherein at least one side wall is made of non-magnetic material or thin-walled magnetic material, allowing magnetic fields to penetrate. The drive assembly 1 is fixed to the outer base or side wall of the pot body 200 and does not contact the internal liquid. The lifting rod assembly 2 is located in the inner cavity of the pot body 200 and rigidly or elastically abuts against the inner plate 100. When the user starts the lifting program, the control system starts the drive motor 11. The mother magnetic component 12 rotates and drives the daughter magnetic component 25 to rotate through magnetic coupling. The rotation is converted into linear motion by the deceleration rotating component 24 and the screw 222, realizing the smooth rise or fall of the inner plate 100. This cooking device has the advantages of high waterproof rating, easy cleaning, high modularity, and safety and reliability, and is particularly suitable for kitchen environments with frequent cleaning and high temperature and humidity.

[0082] The working principle of this embodiment is as follows: The magnetically driven inner plate lifting device provided by this utility model is based on a technical path that combines non-contact magnetic coupling transmission with mechanical conversion of rotational motion to linear motion, thereby realizing the automatic lifting function of the inner plate in cooking equipment.

[0083] During operation, the drive motor in the drive assembly located outside the pot body starts, and the motor connecting shaft at its output end drives the main magnetic component to rotate. The main magnetic component is a high-performance circular permanent magnet with its magnetic poles alternately distributed along the circumference. During rotation, it forms a dynamic rotating magnetic field. This magnetic field can penetrate the non-magnetic or thin-walled magnetic material at the bottom of the pot body and act on the coaxially arranged sub-magnetic component inside the pot body. Due to the magnetic force between the main magnetic component and the sub-magnetic component, which is attracted by opposite magnetic poles, the sub-magnetic component rotates synchronously with the main magnetic component under the traction of the magnetic field, thereby realizing non-contact power transmission. The rotational power of the sub-magnetic component is input to the gear set of the transmission connector or the reduction rotating component through the second transmission component, and then transmitted to the screw by the screw connection part of the transmission connector or the first transmission component of the reduction rotating component. The screw and the connector form a threaded pair, and the connector achieves circumferential limitation through its outer wall and the limiting cylinder, allowing only axial movement.

[0084] Therefore, when the screw rotates under the drive of the transmission connector or the speed reduction rotating component, the connector moves up and down axially under the action of the thread, thereby pushing the first sleeve that abuts against it to rise and fall as a whole. The top of the first sleeve is rigidly or elastically abutted against the bottom of the inner plate. Its lifting and lowering motion directly drives the inner plate to move vertically in the pot, realizing the lifting or falling of the ingredients during the cooking process. The bearing is located between the screw and the connector to support the rotational movement of the screw, reduce frictional resistance, and ensure the coaxiality and smooth operation of the transmission system.

[0085] Throughout the entire operation, the drive assembly is located entirely outside the pot body and does not come into contact with the internal liquid. The lifting rod assembly and its transmission components are located inside the pot body. There is no mechanical shaft connection between the two; they are only coupled by a magnetic field. This structure fundamentally solves the safety hazards of water leakage and electric leakage caused by poor sealing in traditional lifting devices. At the same time, it improves the waterproof rating and the overall safety of the machine. In addition, the outer cylinder protects the internal transmission components, and the sealing ring achieves dynamic sealing in the stepped structure of the first outer cylinder, further preventing liquid seepage and ensuring the long-term stable operation of key components such as transmission connecting parts, deceleration rotating parts, and sub-magnetic parts.

[0086] When the equipment stops working or is powered off, the threaded pair between the screw and the connecting parts has a self-locking characteristic, which can effectively prevent the inner plate from automatically sliding down under the action of gravity, ensuring the stability of the lifting position. The control system can control the forward and reverse rotation of the drive motor according to user instructions or preset programs to achieve precise raising, lowering and positioning of the inner plate.

[0087] This invention realizes a safe, reliable, quiet, and waterproof automatic lifting function for the inner plate, and is applicable to various intelligent cooking equipment such as lifting hot pots and sugar-reducing rice cookers. It has good practicality and industrialization prospects.

[0088] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A magnetically driven inner disc lifting device, comprising an inner disc (100), a drive assembly (1) disposed outside the inner disc (100), and a lifting rod assembly (2) connected to the inner disc (100), characterized in that, The inner disc lifting device also includes an outer cylinder (3) sleeved outside the lifting rod assembly (2). The drive assembly (1) includes a drive motor (11) and a female magnet (12) disposed on the drive motor (11). The lifting rod assembly (2) includes a first sleeve (21) abutting against the inner disc (100), a first rod assembly (22) disposed inside the first sleeve (21), a bearing (23), a transmission connector (27) connected to the first rod assembly (22), and a transmission connector (27) connected to the transmission assembly (22). The first rod assembly (22) is connected to the first sleeve (21) and rotates in cooperation with the first rod assembly (22). The bearing (23) is located between the first rod assembly (22) and the sub-magnetic component (25). The first magnet (12) is used to drive the sub-magnetic component (25) to rotate. The bearing (23) cooperates with the transmission connector (27) so that the first rod assembly (22) drives the first sleeve (21) to move up and down.

2. The magnetically driven inner disc lifting device according to claim 1, characterized in that, The first sleeve (21) has an opening, and the first rod assembly (22) includes a connector (221) disposed inside the first sleeve (21) and abutting against the opening, and a screw (222) disposed inside the connector (221). The connector (221) and the screw (222) are threadedly engaged. A limiting sleeve (26) is provided outside the first sleeve (21), and the limiting sleeve (26) is used to limit the connector (221).

3. The magnetically driven inner disc lifting device according to claim 2, characterized in that, The inner plate lifting device also includes a limiting member (223), which is located below the limiting cylinder (26). The limiting member (223) is detachably connected to the limiting cylinder (26) and forms a first inner cavity (224). The bearing (23) is sleeved on the screw (222) and is located in the first inner cavity (224).

4. The magnetically driven inner disc lifting device according to claim 2, characterized in that, The inner disc lifting device further includes a deceleration rotating component (24), which includes a first transmission component (241), a gear set (242), and a second transmission component (243). The first transmission component (241) and the second transmission component (243) are respectively connected to the gear set (242). The first transmission component (241) is interference-fitted with the screw (222), and the second transmission component (243) is interference-fitted with the sub-magnet component (25).

5. The magnetically driven inner disc lifting device according to claim 4, characterized in that, The outer cylinder (3) includes a first outer cylinder (31) and a second outer cylinder (32) located outside the limiting cylinder (26). The first outer cylinder (31) is located above the second outer cylinder (32). The first rod group (22) is located inside the limiting cylinder (26). The bearing (23), the deceleration rotating component (24), and the sub-magnetic component (25) are all located inside the first outer cylinder (31).

6. The magnetically driven inner disc lifting device according to claim 1, characterized in that, The drive motor (11) is provided with a motor connecting shaft (111), and the female magnetic component (12) is provided with a female magnetic connecting part (121). The motor connecting shaft (111) and the female magnetic connecting part (121) are interference fit.

7. The magnetically driven inner disc lifting device according to claim 4, characterized in that, The drive motor (11) is not coaxial with the mother magnetic component (12), while the mother magnetic component (12), the first rod group (22), the bearing (23), the deceleration rotating component (24), and the daughter magnetic component (25) are coaxial.

8. The magnetically driven inner disc lifting device according to claim 1, characterized in that, Both the mother magnet (12) and the daughter magnet (25) are circular magnets. The transmission connector (27) is provided with a screw connection part and a daughter magnet connection part. The screw connection part is opposite to and coaxially arranged with the daughter magnet connection part. The daughter magnet (25) is sleeved on the daughter magnet connection part and has an interference fit with the daughter magnet connection part. The screw connection part is sleeved on the end of the screw (222) and has an interference fit with the end of the screw (222).

9. The magnetically driven inner disc lifting device according to claim 1, characterized in that, It also includes a heating element (4), which is located above the drive assembly (1). The heating element has a first cavity (41) and a temperature sensing element (42), and the female magnet (12) is located in the first cavity (41).

10. A cooking appliance, characterized in that: The device includes a pot body (200) and an inner plate lifting device as described in any one of claims 1 to 9. The driving component (1) is located outside the pot body (200), and the inner plate (100) is located inside the pot body (200). The inner plate (100) is sleeved on the lifting rod assembly (2) and abuts against the lifting rod assembly. When the driving component (1) drives the lifting rod assembly (2) to lift, the lifting rod assembly (2) drives the inner plate (100) to lift within the pot body (200).

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