Electric cooker

Abstract

The utility model relates to the technical field of food cooking electric appliances, and discloses an electric cooker which comprises a cooker body, an outer pot installed in the cooker body, an inner pot arranged in the outer pot, a steaming basket arranged in the inner pot in a lifting mode, a lifting device and a driving assembly. The lower end of the lead screw is in transmission connection with an output shaft of the driving assembly, the nut is connected to the outer side of the lead screw in a sleeving mode and can move up and down relative to the lead screw, the steaming basket is connected with the nut, the lead screw comprises an upper polished shaft part, a threaded part and a lower polished shaft part which are sequentially arranged from top to bottom, and the nut is matched with threads of the threaded part; the nut is rotationally connected with the lead screw, and the elastic piece is connected to the lower portion of the nut and used for enabling the upper end of the nut to make contact with the thread part when the lower optical axis part is sleeved with the nut. The device is simple in structure, and the lifting position of the inner pot can be controlled within a proper range without arranging a feedback circuit and a structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to food cooking electric appliance technical field especially, a kind of electric rice cooker. BACKGROUND

[0002] With the continuous improvement of people's health consciousness, low-sugar healthy life concept is increasingly accepted, and low-sugar rice has become an indispensable part of healthy diet. The production of low-sugar rice requires the rice to be cooked to semi-cooked and then drained to remove the rice soup, thereby reducing the sugar content in the rice. To achieve this function, the current electric rice cooker adopts a design scheme of setting a lifting mechanism, which includes a threaded rod. A steamer basket is sleeved on the threaded rod and forms a specific cooperation relationship with the threaded rod, so that the steamer basket can realize vertical lifting movement under the rotation of the threaded rod. However, this scheme has disadvantages. If the position of the steamer basket is too high, it will affect the cooking effect and even there is a risk that the steamer basket will be separated from the threaded rod. If the position of the steamer basket is too low, it is easy to be stuck with the threaded rod. A position sensor needs to be set to feed back the position of the steamer basket to the control system of the lifting mechanism, so that the control system controls the start and stop of the lifting mechanism when the steamer basket reaches the limit position. This makes the control and feedback circuit structure of the electric rice cooker complex and high in cost. SUMMARY

[0003] To solve the technical problems of the feedback circuit and complex structure for controlling the lifting mechanism in the above-mentioned electric rice cooker and high cost, the utility model provides an electric rice cooker, which does not need to set a feedback circuit and structure, and can control the lifting position of the steamer basket within a suitable range by relying on the structure of the lifting device itself. The device is simple in structure and low in cost.

[0004] The specific technical scheme of the utility model is as follows: an electric rice cooker, which comprises a pot body, an outer pot installed in the pot body, an inner pot arranged in the outer pot, a steamer basket arranged in the inner pot in a liftable manner, a lifting device, and a driving assembly. The lifting device comprises a lead screw, a nut, and an elastic member. The lower end of the lead screw is in transmission connection with the output shaft of the driving assembly. The nut is sleeved on the outer side of the lead screw and can move up and down relative to the lead screw. The steamer basket is connected with the nut. The driving assembly drives the lead screw to rotate, so that the nut drives the steamer basket to switch between a draining position and an immersion position. The lead screw comprises an upper light shaft portion, a threaded portion, and a lower light shaft portion arranged in sequence from top to bottom. The nut is adapted to the threads of the threaded portion. When the steamer basket is at the draining position, the nut is sleeved on the upper light shaft portion and is in rotational connection with the lead screw. When the steamer basket is at the immersion position, the nut is sleeved on the lower light shaft portion and is in rotational connection with the lead screw. The elastic member is connected below the nut and is used to make the upper end of the nut contact the threaded portion when the nut is sleeved on the lower light shaft portion.

[0005] In the device, the lead screw includes an upper light shaft portion, a threaded portion and a lower light shaft portion arranged in sequence from top to bottom, and the moving range of the nut is the threaded portion. When the driving assembly drives the lead screw to rotate forward, the nut is driven by the thread to move upward to the upper light shaft portion to reach the draining position. Since the upper light shaft portion is not threaded, and the nut can only rotate circumferentially relative to the lead screw under the weight of the steamer and the food material carried thereby and cannot continue to move upward, the upper limit of the nut is achieved. The position at this time can meet the cooking needs of the steamer. After cooking, the driving assembly drives the lead screw to rotate in the reverse direction, and the nut drives the steamer to move downward to the lower light shaft portion to reach the soaking position. Even if the lead screw continues to rotate in the reverse direction, it cannot continue to drive the nut to move downward, thereby achieving the lower limit of the nut. Since the elastic member supports the nut, the upper end of the nut is always in contact with the threaded portion when the nut is in the lower light shaft portion, thereby ensuring that the nut has the corresponding conditions when it needs to rise again, i.e. it can move upward along the threaded portion when the lead screw rotates forward, thereby realizing the lifting operation of the steamer again and preparing for the next cooking process. The device sets the upper light shaft portion, the threaded portion and the lower light shaft portion on the lead screw, replaces the existing control system, controls the lifting position of the steamer within a suitable range, and has a simple structure and low cost.

[0006] As a preferred, the lifting device further comprises a transmission support, a lower end of the transmission support is detachably transmission connected with an output shaft of the driving assembly, and an upper end of the transmission support is transmission connected with a lower end of the lead screw.

[0007] In the above technical solution, the driving assembly transmits power to the lead screw through the transmission support, improving the stability of power transmission. When the steamer rises, the transmission support bears and disperses the axial and radial load, preventing the lead screw from deforming. In addition, the driving assembly and the lead screw are connected through the transmission support, reducing the assembly difficulty of the driving assembly and the lead screw.

[0008] As a preferred, an upper end of the elastic member abuts against the nut, and a lower end of the elastic member abuts against the transmission support.

[0009] In the above technical solution, the elastic member elastically supports the nut, the elastic member abuts against the nut and the transmission support, one end of the elastic member can slide relative to the nut or the transmission support, preventing the nut from rotating synchronously with the transmission support, ensuring that the movements of the two are independent of each other. At the same time, the elastic member abuts against the internal parts of the lifting device. When replacing the components, the elastic member can be as a whole with the lifting device, facilitating disassembly and assembly.

[0010] As a preferred, a gasket is rotationally connected to the transmission support, the gasket is arranged between the elastic member and the transmission support, and a lower end of the elastic member abuts against the gasket.

[0011] In the technical scheme, the gasket is rotatably connected with the transmission support, and when the transmission support rotates, the gasket can remain not to rotate; the elastic member is connected with the gasket, and the movement state of the elastic member is consistent with that of the gasket, which can better prevent the nut from rotating synchronously with the transmission support, and can also avoid friction between the elastic member and the transmission support, thereby reducing the component loss.

[0012] Preferably, a support block for supporting the steaming basket is fixed on the nut, and a transmission shaft is fixed on the support block; the steaming basket is provided with a through hole matched with the transmission shaft, and the transmission shaft passes through the through hole upward and is fixed circumferentially with the steaming basket.

[0013] In the technical scheme, the support block supports the steaming basket, and the steaming basket is not fixed with the support block, so that the steaming basket can be taken out and cleaned alone; meanwhile, the support block helps to evenly distribute the weight of the steaming basket and the food carried by the steaming basket, thereby improving the pressure bearing capacity of the nut; the transmission shaft is arranged to keep the steaming basket in a consistent state with the nut, thereby helping the nut to drive the steaming basket to ascend and descend.

[0014] Preferably, when the nut is sleeved on the lower optical shaft part, the bottom of the steaming basket is in contact with the bottom of the inner pot, and the support block is separated from the steaming basket.

[0015] In the technical scheme, when the steaming basket is in the lowest position, the weight of the steaming basket and the food in the steaming basket is borne by the inner pot, and the nut does not bear additional weight, thereby avoiding damage of the nut due to long-term bearing of heavy pressure, prolonging the service life of the nut, and reducing the pressure borne by the elastic member in the process, so that the elastic member only needs to support the nut itself, which is conducive to maintaining the elastic performance of the elastic member.

[0016] Preferably, the driving assembly comprises a rotary driving member and a sealing transmission member; the rotary driving member is installed on the outer pot or the pot body; the output shaft of the rotary driving member passes through the outer pot and is in transmission connection with the lower end of the sealing transmission member; the upper end of the sealing transmission member passes through and extends into the inner pot; and the sealing transmission member is in sealing connection with the inner pot.

[0017] In the technical scheme, the sealing transmission member is arranged to seal the inner pot, prevent the leakage of liquid and steam in the inner pot, and serve as a power output end of the driving assembly to transmit the kinetic energy of the rotary driving member to the lead screw, so that the power transmission and sealing functions are integrated together, the internal structure of the electric rice cooker is more compact and simple, the length of the output shaft of the rotary driving member can be effectively reduced to reduce the processing difficulty, reduce the risk of deformation of the output shaft, and enhance the stability of the transmission structure.

[0018] Preferably, the inner pot is provided with a through hole for the sealing transmission component to pass through, the edge of the through hole extends inward to form a sealing ring, and an elastic sealing element is fixedly sealed on the sealing transmission component. The elastic sealing element is provided with a sealing groove that matches the sealing ring, and the sealing ring extends into the sealing groove and fits tightly against the elastic sealing element to achieve a sealing connection.

[0019] In the above technical solution, the sealing groove is U-shaped. In the assembled state, the sealing ring is tightly embedded in the U-shaped gap of the elastic sealing element, which has good sealing performance and is not easy to leak water even if the sealing transmission component rotates relative to the inner pot.

[0020] Preferably, the inner wall of the inner pot is provided with a first inwardly protruding limiting member, and the outer wall of the steaming basket is provided with a second outwardly protruding limiting member. The first limiting member and the second limiting member abut against each other in the circumferential direction to achieve circumferential limiting of the inner pot on the steaming basket.

[0021] In the above technical solution, the first limiting member and the second limiting member cooperate to restrict the steaming basket and the lead screw to rotate synchronously, thereby restricting the nut and the lead screw to rotate synchronously, so that when the drive assembly drives the lead screw to rotate, the nut can move at the threaded part of the lead screw, thereby driving the steaming basket to rise and fall.

[0022] Preferably, the device also includes a stirring blade and a stirring transmission component. The lower end of the stirring transmission component is detachably connected to the output shaft of the drive assembly. The stirring blade is fixed to the stirring transmission component. The lifting device and the stirring transmission component are optionally installed in the inner pot and connected to the output shaft of the drive assembly.

[0023] In the above technical solution, the lifting device and stirring transmission component can be installed alternately according to cooking needs. Only by changing the components, it is possible to cook low-sugar rice and other foods that require stirring, making the rice cooker multifunctional and capable of cooking a variety of foods to better meet user needs.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] (1) Simple structure and low cost: The lead screw is equipped with an upper optical shaft, a threaded part and a lower optical shaft. When the nut is in the threaded part, it can move up and down to drive the steaming basket to rise and fall. When the nut is in the upper optical shaft and the lower optical shaft, it cannot move. Thus, the rising and falling position of the steaming basket is automatically controlled within a suitable range. This device replaces the existing control system with the design of the lead screw, which does not require a complex circuit structure and has a low cost.

[0026] (2) It can cook a variety of foods and is easy to operate: the lifting device and stirring transmission can be installed alternately according to cooking needs. Only the components need to be replaced to cook low-sugar rice and other foods that require stirring, making the rice cooker multifunctional. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the steaming basket of this utility model at its lowest position;

[0029] Figure 3 yes Figure 1 A magnified view of a section at point A in the middle;

[0030] Figure 4 yes Figure 1 A magnified view of a section at point B in the middle;

[0031] Figure 5 This is a schematic diagram of the steaming basket of this utility model rising to its highest position;

[0032] Figure 6 yes Figure 1 A magnified view of a section at point C;

[0033] Figure 7 This is a structural schematic diagram of the installation of the stirring transmission component of this utility model.

[0034] The attached figures are labeled as follows: 1. Pot body; 2. Outer lid; 3. Heating device; 4. Outer pot; 5. Inner pot; 51. Sealing ring; 6. Steaming basket; 7. Lifting device; 71. Lead screw; 711. Upper optical shaft; 712. Threaded part; 713. Lower optical shaft; 72. Nut; 721. Drive shaft; 722. Support block; 73. Elastic element; 8. Drive assembly; 81. Rotation drive component; 82. Sealing transmission component; 83. Elastic sealing component; 9. Transmission support component; 10. First limiting component; 11. Second limiting component; 12. Stirring transmission component; 121. Stirring blade; 13. Gasket. Detailed Implementation

[0035] The present invention will be further described below with reference to embodiments. Unless otherwise specified, all devices, connection structures, and methods involved in this invention are known in the art.

[0036] Example 1

[0037] Reference Figures 1 to 6As shown, this utility model provides a rice cooker, including a cooker body 1, an outer lid 2, a heating device 3, an outer pot 4 installed inside the cooker body 1, an inner pot 5 placed inside the outer pot 4, a steaming basket 6 that can be lifted and lowered inside the inner pot 5, a lifting device 7, and a drive assembly 8. The outer lid 2 is closable and connected to the top of the cooker body 1. The heating device 3 is installed between the inner pot 5 and the outer pot 4, with the bottom surface of the inner pot 5 contacting the upper surface of the heating device 3. The drive assembly 8 is installed on the cooker body 1 or the outer pot 4, with the output shaft of the drive assembly 8 facing and extending into the inner pot 5. The inner pot 5 is provided with a lifting device 7, which includes a lead screw 71, a nut 72, and an elastic element 73. The lower end of the lead screw 71 is connected to the output shaft of the drive assembly 8. The nut 72 is sleeved on the outside of the lead screw 71 and can move up and down relative to the lead screw 71. The drive assembly 8 drives the lead screw 71 to rotate, so that the nut 72 drives the steaming basket 6 to switch between a draining position and a immersion position. The bottom of the steaming basket 6 has an upwardly protruding connecting part. The nut 72 is located below the connecting part and is detachably connected to the steaming basket 6. The nut 72 supports and drives the steaming basket 6 to rise and fall. The steaming basket 6 has several drainage holes with a diameter smaller than that of a common grain of rice. The lead screw 71 includes an upper smooth shaft part 711, a threaded part 712, and a lower smooth shaft part 713 arranged sequentially from top to bottom. The nut 72 is threaded to the threaded part 712. When the steaming basket 6 is in the draining position, the nut 72 is fitted onto the upper smooth shaft part 711, and the nut 72 is rotatably connected to the lead screw 71. That is, the nut 72 can rotate circumferentially while maintaining its axial position. When the steaming basket 6 is in the immersion position, the nut 72 is fitted onto the lower smooth shaft part 713, and the nut 72 is rotatably connected to the lead screw 71. The top end of the elastic member 73 abuts against the bottom end of the nut 72, and the elastic member 73 supports the nut 72 so that the upper end of the nut 72 contacts the threaded part 712. The outer cover 2 has a vent hole, which is connected to the outer pot 4 and the inner pot 5. The steam generated during cooking is discharged outside the pot body 1 through the vent hole. Understandably, the heating element 3 can also be located between the pot body 1 and the outer pot 4.

[0038] In this device, the lead screw 71 includes an upper optical shaft portion 711, a threaded portion 712, and a lower optical shaft portion 713 arranged sequentially from top to bottom. The threaded portion 712 is the range of movement for the nut 72. When the drive assembly 8 drives the lead screw 71 to rotate in the forward direction, the nut 72, under the action of the thread, moves the steaming basket 6 upward to the upper optical shaft portion 711. Since the upper optical shaft portion 711 has no thread, and the nut 72 can only rotate circumferentially relative to the lead screw 71 under the weight of the steaming basket 6 and the food it carries, it cannot continue to move upward, thus achieving the upper limit of the nut 72. This position can meet the cooking needs of the steaming basket 6. After cooking... After completion, the drive assembly 8 drives the lead screw 71 to rotate in the opposite direction, and the nut 72 drives the steaming basket 6 to move down to the lower optical shaft 713. At this time, even if the lead screw 71 continues to rotate in the opposite direction, it cannot continue to drive the nut 72 to move down, thereby achieving the lower limit of the nut. Since the elastic element 73 supports the nut 72, the upper end of the nut 72 always contacts the threaded part 712, thereby ensuring that the nut 72 has the corresponding conditions when it needs to rise again in the future. That is, it can move upward along the threaded part 712 when the lead screw 71 rotates in the forward direction, thereby realizing the lifting and lowering operation of the steaming basket 6 again, and preparing for the next cooking process. This device replaces the existing control system by setting an upper optical shaft 711, a threaded part 712, and a lower optical shaft 713 on the lead screw 71. It eliminates the need for multiple sensor elements such as position sensors and load sensors to accurately monitor the real-time position and load of the steaming basket. The collected data is then transmitted to the controller of the control system for analysis and processing. Based on the analysis results, corresponding control commands are generated to control the start, stop, speed, and direction of the motor, thus controlling the lifting position of the steaming basket 6 within a suitable range. The structure is simple and low-cost. By setting an elastic element 73 to support the nut 72, the upper end of the nut 72 can still touch the threaded part 712 when it is lowered to the lowest position. When the lead screw 71 rotates in the forward direction, the nut 72 can drive the steaming basket 6 to rise along with the thread of the threaded part 712. At the same time, during the process of the nut 72 driving the steaming basket 6 to descend, due to the weight of the steaming basket 6 and the food inside, a large impact force is generated during the descent. The elastic element 73 can effectively absorb and disperse these impact forces by its own elastic properties, playing a buffering role.

[0039] The implementation method of this device is as follows: When cooking rice, lower the steaming basket 6 to the water immersion position, with the nut 72 on the lower optical shaft 713. Then, put an appropriate amount of rice and water into the steaming basket 6, with the water covering the drain hole of the steaming basket 6. Close the outer cover 2, turn on the rice cooker to heat the inner pot 5, and after cooking the rice for a certain period of time, drive the drive assembly 8 to drive the lead screw 71 to rotate in the forward direction. The nut 72 moves upward along the thread of the threaded part 712, causing the steaming basket 6 to rise to the drain position. At this time, the water in the steaming basket 6 flows out from the drain hole to the bottom of the inner pot 5 and continues to be heated to a boil, generating a large amount of water vapor to cook the rice in the steaming basket 6. Open the outer cover 2 and take out the steaming basket 6.

[0040] Example 2

[0041] Based on Example 1, refer to Figures 1 to 6 As shown, this utility model provides a rice cooker. The drive assembly 8 includes a rotating drive component 81 and a sealing transmission component 82. The rotating drive component 81 is installed on the cooker body 1. The output shaft of the rotating drive component 81 passes through the outer pot 4 and is connected to the lower end of the sealing transmission component 82. The shaft-shaped upper end of the sealing transmission component 82 passes through and extends into the inner pot 5, and the sealing transmission component 82 and the inner pot 5 are sealed together. The inner pot 5 is provided with a through hole for the sealing transmission component 82 to pass through. The edge of the through hole extends inward to form a sealing ring 51. An elastic sealing component 83 is sealed and fixed on the sealing transmission component 82. The elastic sealing component 83 is provided with a U-shaped sealing groove that matches the sealing ring 51. The sealing ring 51 extends into the sealing groove and is tightly attached to the elastic sealing component 83 to achieve a sealed connection. The lifting device 7 includes a transmission support member 9. The lower end of the transmission support member 9 has a first inner hole, through which it is coaxially sleeved with the upper end of the sealing transmission member 82. The upper end of the transmission support member 9 has a second inner hole, through which it is tightly sleeved with the lower end of the lead screw 71. The cross-sectional shapes of the first and second inner holes are non-circular. The cross-sectional shapes of the upper end of the sealing transmission member 82 and the lower end of the lead screw 71 are also non-circular. The cross-sectional shapes of the first inner hole, the second inner hole, the output shaft of the drive assembly 8, and the lower end of the lead screw 71 are all selected from triangles, quadrilaterals, pentagons, hexagons, heptagons, octagons, nonagons, decagons, elevenths, dodecagons, thirteenths, fourteenths, fifteenths, and sixteenths. In this embodiment, the rotating drive member 81 is a motor. It is understood that the rotating drive member 81 can also be installed on the outer pot 4. The elastic element 73 is sleeved on the outside of the lead screw 71, with its lower end abutting against the transmission support 9 and its upper end abutting against the bottom end of the nut 72. This allows the end of the elastic element 73 to slide relative to the nut 72 or the transmission support 9. It is understood that in other embodiments, the elastic element 73 is sleeved on the outside of the lead screw 71, with its lower end abutting against the transmission support 9 and its upper end fixedly connected to the bottom end of the nut 72; or the upper end of the elastic element 73 abuts against the bottom end of the nut 72 and its lower end is fixedly connected to the transmission support 9, allowing one end of the elastic element 73 to slide relative to the nut 72 or the transmission support 9. A washer 13 is rotatably connected to the transmission support 9, and the washer 13 is disposed between the elastic element 73 and the transmission support 9, with the lower end of the elastic element 73 abutting against the washer 13.

[0042] In this embodiment, a sealing transmission component 82 is provided. On the one hand, it seals the inner pot 5 to prevent leakage of liquid and steam in the inner pot 5. On the other hand, it serves as the power output end of the drive assembly 8, transmitting the kinetic energy of the rotating drive component 81 to the lead screw 71. It integrates power transmission and sealing functions, making the internal structure of the rice cooker more compact and concise. At the same time, power transmission through the sealing transmission component 82 can effectively reduce the length of the output shaft of the rotating drive component 81, reduce processing difficulty, reduce the risk of output shaft deformation, and enhance the stability of the transmission structure. In the assembled state, the sealing ring is tightly embedded in the U-shaped sealing groove of the elastic seal 83, providing good sealing performance. Even if the sealing transmission component rotates relative to the inner pot, it is not easy to leak water. The drive assembly 8 transmits power to the lead screw 71 through the transmission support component 9, improving the stability of power transmission. When the steaming basket 6 rises, the transmission support component 9 bears and disperses the axial and radial loads, preventing the lead screw 71 from deforming. In addition, the connection between the drive assembly 8 and the lead screw 71 through the transmission support component 9 reduces the assembly difficulty of the drive assembly 8 and the lead screw 71. The elastic element 73 elastically supports the nut 72, abutting against both the nut 72 and the transmission support 9. The end of the elastic element 73 can slide relative to either the nut 72 or the transmission support 9, preventing the nut 72 and the transmission support 9 from rotating synchronously and ensuring their independent movement. Simultaneously, the elastic element 73 abuts against internal parts of the lifting device 7, allowing it to function as a single unit when components are replaced, facilitating easy disassembly and assembly. Since the washer 13 is rotatably connected to the transmission support 9, it remains stationary when the transmission support 9 rotates. The elastic element 73 is connected to the washer 13, and its movement is synchronized with that of the washer 13, further preventing the nut 72 from rotating synchronously with the transmission support 9 and avoiding friction between them, thus reducing component wear.

[0043] Furthermore, a support block 722 for supporting the steaming basket 6 is fixed on the nut 72, and a drive shaft 721 is fixed on the support block 722. The drive shaft 721 passes through the support block 722. The steaming basket 6 is provided with a connecting part that connects to the nut 72. The connecting part is provided with a through hole that matches the drive shaft 721. The drive shaft 721 passes upward through the through hole and is circumferentially fixed to the steaming basket 6. The top surface of the support block 722 abuts against the steaming basket 6, driving the steaming basket 6 to rise and fall. The cross-sectional shape of the drive shaft 721 and the through hole is non-circular. When the nut 72 is fitted onto the lower smooth shaft part 713, that is, when the steaming basket 6 is in the water-immersed position, the bottom of the steaming basket 6 contacts the bottom of the inner pot 5. At this time, the distance H1 between the connecting part and the abutting surface of the support block 722 and the bottom of the inner pot 5 is greater than the distance H2 between the top surface of the support block 722 and the bottom of the inner pot 5, so that the support block 722 is detached from the steaming basket 6. By fixing a support block 722 to the nut 72, the support block 722 supports the steaming basket 6. The steaming basket 6 is not fixed to the support block 722, making it easy to remove the steaming basket 6 for cleaning. Simultaneously, the support block 722 helps to evenly distribute the weight of the steaming basket 6 and the food it carries, improving the pressure-bearing capacity of the nut 72. By setting a drive shaft 721, the steaming basket 6 and the nut 72 are kept in the same position, facilitating the nut 72 to drive the steaming basket 6 to rise and fall. When the steaming basket 6 is in its lowest position, the inner pot 5 bears the weight of the steaming basket 6 and the food inside, and the nut 72 bears no additional load, preventing damage from prolonged heavy pressure and extending its service life. At the same time, it reduces the pressure on the elastic element 73 during this process; the elastic element 73 only needs to support the nut 72 itself, which helps maintain the elastic performance of the elastic element 73. It is understood that in another embodiment, the nut is directly fixed to the steaming basket, and the raising and lowering of the nut drives the raising and lowering of the steaming basket.

[0044] Furthermore, the inner wall of the inner pot 5 is provided with two inwardly protruding first limiting members 10, and the outer wall of the steaming basket 6 is provided with an outwardly protruding second limiting member 11. The first limiting members 10 and the second limiting members 11 abut against each other in the circumferential direction to achieve circumferential positioning of the inner pot 5 on the steaming basket 6. The included angle between the two limiting members 10 is greater than the central angle of the second limiting member 11. During installation, the second limiting member 11 is placed between the two limiting members 10, and the steaming basket 6 does not need to be precisely aligned. When disassembling the steaming basket 6, the steaming basket 6 has sufficient range of motion to move out from between the two limiting members 10, which is convenient for loading and unloading. The first limiting members 10 and the second limiting members 11 cooperate to restrict the steaming basket 6 from rotating synchronously with the lead screw 71, thereby restricting the nut 72 from rotating synchronously with the lead screw 71. This allows the nut 72 to move at the threaded part 712 of the lead screw 71 when the drive assembly 8 drives the lead screw 71 to rotate, thereby driving the steaming basket 6 to rise and fall. Understandably, in another embodiment, a rotation limiting rod is provided at the position corresponding to the nut 72 in the inner pot 5. The rotation limiting rod restricts the circumferential rotation of the nut 72 but does not affect the vertical movement of the nut 72 relative to the lead screw 71, thereby enabling the steaming basket 6 to rise and fall within the inner pot 5. Understandably, in another embodiment, a first protruding limiting member 10 is provided on the inner wall of the inner pot 5, and a slot adapted to the first limiting member 10 is provided on the steaming basket 6. The first limiting member 10 is engaged with the steaming basket 6, and the steaming basket 6 can slide vertically relative to the first limiting member 10. The top end of the first limiting member 10 is higher than the top end of the lead screw 71, and the bottom end is lower than the bottom end of the lead screw 71.

[0045] Furthermore, such as Figure 7 As shown, the rice cooker also includes a stirring blade 121 and a stirring transmission component 12. The lower end of the stirring transmission component 12 is detachably connected to the output shaft of the drive assembly 8. The stirring blade 121 is fixed to the stirring transmission component 12. The lifting device 7 and the stirring transmission component 12 are selectively installed in the inner pot 5 and connected to the output shaft of the drive assembly 8. The lifting device 7 and the stirring transmission component 12 can be installed alternately according to cooking needs. Only the components need to be replaced to cook low-sugar rice and other foods that require stirring, making the rice cooker multifunctional and capable of cooking various types of food to better meet user needs.

[0046] The transmission method in this embodiment is as follows: the motor is used as the power source, and its output shaft rotates, which drives the sealing transmission component 82 connected to it to rotate circumferentially. At this time, the inner pot 5 does not rotate with the elastic sealing component 83. The sealing transmission component 82 transmits power upward, which drives the transmission support component 9 to rotate circumferentially. The transmission support component 9 drives the lead screw 71 to rotate circumferentially. When the lead screw 71 rotates, the nut 72 that is threaded with the lead screw 71 cannot rotate synchronously with the lead screw 71 due to the restriction of the first limiting component 10 and the second limiting component 11. This causes the nut 72 to drive the steaming basket 6 to rise and fall along the thread of the threaded part 712.

[0047] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, alterations, or equivalent structural transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. An electric rice cooker, comprising a cooker body (1), an outer pot (4) installed inside the cooker body (1), an inner pot (5) disposed inside the outer pot (4), a steaming basket (6) disposed in the inner pot (5) with adjustable height, a lifting device (7), and a drive assembly (8), characterized in that, The lifting device (7) includes a lead screw (71), a nut (72), and an elastic element (73). The lower end of the lead screw (71) is connected to the output shaft of the drive assembly (8). The nut (72) is sleeved on the outside of the lead screw (71) and can move up and down relative to the lead screw (71). The steaming basket (6) is connected to the nut (72). The drive assembly (8) drives the lead screw (71) to rotate so that the nut (72) drives the steaming basket (6) to switch between the draining position and the immersion position. The lead screw (71) includes an upper smooth shaft part (711), a threaded part (712), and a lower smooth shaft part arranged sequentially from top to bottom. The nut (72) and the threaded part (712) are threadedly matched. When the steaming basket (6) is in the draining position, the nut (72) is sleeved on the upper smooth shaft part (711) and the nut (72) is rotatably connected to the lead screw (71). When the steaming basket (6) is in the immersion position, the nut (72) is sleeved on the lower smooth shaft part (713) and the nut (72) is rotatably connected to the lead screw (71). The elastic element (73) is connected below the nut (72) and is used to make the upper end of the nut (72) contact the threaded part (712) when the nut (72) is sleeved on the lower smooth shaft part (713).

2. The rice cooker according to claim 1, characterized in that, The lifting device (7) also includes a transmission support (9), the lower end of which is detachably connected to the output shaft of the drive assembly (8), and the upper end of which is connected to the lower end of the lead screw (71).

3. The rice cooker according to claim 2, characterized in that, The upper end of the elastic element (73) abuts against the nut (72), and the lower end of the elastic element (73) abuts against the transmission support (9).

4. The rice cooker according to claim 3, characterized in that, A shim is rotatably connected to the transmission support member (9). The shim is located between the elastic member (73) and the transmission support member (9). The lower end of the elastic member (73) abuts against the shim.

5. A rice cooker according to any one of claims 1 to 4, characterized in that, A support block (722) for supporting the steaming basket (6) is fixed on the nut (72). A drive shaft (721) is fixed on the support block (722). The steaming basket (6) is provided with a through hole that matches the drive shaft (721). The drive shaft (721) passes through the through hole upward and is circumferentially fixed to the steaming basket (6).

6. The rice cooker according to claim 5, characterized in that, When the nut (72) is fitted onto the lower optical shaft (713), the bottom of the steaming basket (6) contacts the bottom of the inner pot (5), and the support block (722) disengages from the steaming basket (6).

7. A rice cooker according to any one of claims 1 to 4, characterized in that, The drive assembly (8) includes a rotation drive (81) and a sealing transmission component (82). The rotation drive (81) is mounted on the outer pot (4) or the pot body (1). The output shaft of the rotation drive (81) passes through the outer pot (4) and is connected to the lower end of the sealing transmission component (82). The upper end of the sealing transmission component (82) passes through and extends into the inner pot (5). The sealing transmission component (82) and the inner pot (5) are sealed together.

8. A rice cooker according to claim 7, characterized in that, The inner pot (5) is provided with a through hole for the sealing transmission member (82) to pass through. The edge of the through hole extends inward to form a sealing ring (51). An elastic sealing member (83) is sealed and fixed on the sealing transmission member (82). The elastic sealing member (83) is provided with a sealing groove that matches the sealing ring (51). The sealing ring (51) extends into the sealing groove and is tightly attached to the elastic sealing member (83) to achieve a sealing connection.

9. A rice cooker according to any one of claims 1 to 4, characterized in that, The inner wall of the inner pot (5) is provided with an inwardly protruding first limiting member (10), and the outer wall of the steaming basket (6) is provided with an outwardly protruding second limiting member (11). The first limiting member (10) and the second limiting member (11) abut against each other in the circumferential direction to realize the circumferential limiting of the inner pot (5) on the steaming basket (6).

10. A rice cooker according to claim 1, characterized in that, It also includes a stirring blade (121) and a stirring transmission component (12). The lower end of the stirring transmission component (12) is detachably connected to the output shaft of the drive assembly (8). The stirring blade (121) is fixed to the stirring transmission component (12). The lifting device (7) and the stirring transmission component (12) are selectively installed on the inner pot (5) and connected to the output shaft of the drive assembly (8).

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