Cooking machine

Abstract

The automatic cooker comprises a pot body and a pot cover, a stirring shovel and a driving device used for driving the stirring shovel to rotate are arranged on the pot cover, the driving device comprises a motor, a worm and a worm gear, the worm is in linkage with an output shaft of the motor, the worm gear is in meshing transmission with the worm, and the worm is a double-helix worm. The double-spiral worm comprises a rod body, a first spiral tooth surface and a second spiral tooth surface, the first spiral tooth surface and the second spiral tooth surface are arranged on the rod body, and the first spiral tooth surface and the second spiral tooth surface are alternately meshed with the worm gear, so that the driving device has a forward transmission state that the worm drives the worm gear to rotate and a reverse transmission state that the worm drives the worm to rotate. According to the automatic cooker, the adopted worm is the double-spiral worm, the first spiral tooth surface and the second spiral tooth surface are arranged on the rod body of the worm, the first spiral tooth surface and the second spiral tooth surface are alternately meshed with the worm gear, the transmission process is stable, vibration is small, noise is low, and the technical problem that noise is large in the operation process of an existing automatic cooker is well solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of household appliances, and particularly relates to a cooking machine. BACKGROUND

[0002] The existing cooking machine generally comprises a pot cover, a pot body and a frying pan arranged in the pot body, the pot body is provided with a heating device to heat the frying pan, the pot cover is connected with a cover handle, the cover handle is provided with a driving device, the middle part of the pot cover is provided with a penetrating shaft hole, the shaft hole is provided with a rotatable bearing, the inner side of the bearing towards the pot cover is provided with a first coupling connection part, the first coupling connection part is detachably connected with a stirring spatula, the outer side of the bearing towards the pot cover is provided with a second coupling connection part, the second coupling connection part is connected with the driving device, when the user needs to realize automatic cooking by using the cooking machine, the stirring spatula and the driving device are connected with the first coupling connection part and the second coupling connection part respectively, the pot cover is connected with the cover handle, and automatic stirring and frying of the food in the frying pan can be realized through the control program of the cooking machine.

[0003] In order to facilitate complete cleaning of the stirring spatula and to facilitate disentangling of the food entangled on the stirring spatula during the cooking process, the stirring spatula is designed to be convenient for the user to disassemble, generally, the prior art sets a clamping column on the first coupling connection part, and sets a clamping groove matched with the clamping column on the stirring spatula to realize detachable connection between the two. The matching mode of the clamping groove and the clamping column enables the user to disassemble the stirring spatula in either clockwise direction or counterclockwise direction, so the rotation direction of the disassembled stirring spatula may be opposite to the rotation direction of the stirring spatula during the cooking process, and the disassembly of the stirring spatula will drive the driving device to operate reversely in this condition.

[0004] Therefore, the driving device becomes one of the core components of the cooking machine, in order to ensure that the driving device can realize forward and reverse rotation, the existing driving device generally comprises a motor and a helical gear transmission mechanism or a straight gear transmission mechanism linked with the output shaft of the motor, the motor drives the stirring spatula to rotate through the helical gear transmission mechanism or the straight gear transmission mechanism, which can realize forward and reverse rotation of the motor and has the advantage of large driving force, which exactly meets the driving application of the cooking machine, but the gear transmission mechanism has the characteristics of fast vibration speed and high vibration frequency, so that the driving device of the cooking machine in the prior art has the defects of unstable swing and large noise, and the noise will continuously increase with the prolongation of the use time due to the wear of gear meshing, thereby greatly reducing the user experience. CONTENT OF THE UTILITY MODEL

[0005] The application provides a cooking machine to solve the technical problem that the existing cooking machine has large noise during operation and affects the user experience.

[0006] The technical scheme adopted by the application is as follows:

[0007] A cooking machine comprises a pot body and a pot cover, the pot cover is provided with a stirring shovel and a driving device for driving the stirring shovel to rotate, the driving device comprises a motor, a worm gear connected with the output shaft of the motor, and a worm wheel engaged with the worm gear, the worm gear is a double helix worm gear, the double helix worm gear comprises a rod body and a first helical tooth surface and a second helical tooth surface arranged on the rod body, the first helical tooth surface and the second helical tooth surface are alternately engaged with the worm wheel, so that the driving device has a positive transmission state in which the worm gear drives the worm wheel to rotate and a reverse transmission state in which the worm wheel drives the worm gear to rotate.

[0008] The helical shape of the worm gear in the process of worm gear transmission makes the teeth of the worm gradually embedded in the worm gear tooth groove with rotation. Due to the relatively large angle of the worm, the friction between the worm and the worm gear will increase accordingly. When the lead angle of the worm is less than the friction angle of the worm in contact with the worm gear, the worm gear transmission realizes self-locking, which is very useful in preventing reverse motion. However, for a cooking machine, the process of disassembling the stirring shovel may cause the motor to reverse, so the self-locking feature of the traditional worm gear makes it impossible to be applied to a cooking machine. However, the worm gear used in the present application is a double helix worm gear, which has a first helical tooth surface and a second helical tooth surface on the rod body. The first helical tooth surface and the second helical tooth surface are alternately engaged with the worm wheel, so that the driving device has a positive transmission state in which the worm gear drives the worm wheel to rotate and a reverse transmission state in which the worm wheel drives the worm gear to rotate, thereby meeting the requirements of the motor in the cooking machine application process. Not only that, the contact between the double helix worm gear and the worm wheel is continuous, so the transmission process is stable, with little vibration and low noise, which solves the technical problem of loud noise in the operation of the existing cooking machine. Furthermore, the first helical tooth surface and the second helical tooth surface of the double helix worm gear alternately engage with the worm wheel, so that the double helix worm gear and the worm wheel can be transmitted more stably, reducing the load borne by a single tooth surface, thereby reducing the wear of the double helix worm gear and the worm wheel, and prolonging the service life of the two. In addition, the transmission structure of the double helix worm gear and the worm wheel is compact and small in size, reducing the volume occupation of the pot cover and facilitating the lightweight design of the pot cover.

[0009] The first helical tooth surface and the second helical tooth surface are helically wound around the same helical axis to form a double helix, and the first helical tooth surface and the second helical tooth surface are respectively open at the axial end of the worm to form a first helical opening and a second helical opening, respectively, which are symmetrically distributed at 180° at the axial end face of the worm.

[0010] In the technical solution, the first spiral opening and the second spiral opening are symmetrically distributed at the axial end face of the worm by 180 degrees, which helps to uniformly distribute the load in the transmission process, reduces the unbalanced load, improves the stability of the transmission, enables the double helical worm and the worm wheel to continuously mesh in the transmission process, and improves the user experience.

[0011] The driving device further comprises a speed reducer linked with the worm wheel, and the stirring shovel is in transmission connection with the speed reducer.

[0012] The technical solution can achieve a large transmission ratio by additionally arranging the speed reducer in the transmission between the worm wheel and the stirring shovel, so as to convert the high-speed input of the motor into low-speed output, which can save energy consumption and further reduce the noise and vibration in the transmission process, thereby improving the quietness and comfort of the working environment during the operation of the cooking machine and improving the user experience.

[0013] The speed reducer comprises a sun gear, a plurality of planet gears distributed on the outer periphery of the sun gear and in meshing transmission with the sun gear, and a rotating member driven to rotate by the planet gears, and the rotating member is provided with a transmission shaft connected with the stirring shovel.

[0014] The technical solution adopts the planetary reducer to realize the transmission between the worm wheel and the stirring shovel, wherein the sun gear and the planet gears have a plurality of large-area 360-degree uniform loads on the gear contact surfaces, which can withstand larger impact loads, and the reducer will not be damaged due to excessive load, thereby ensuring the reliability and stability of the driving device in operation. Moreover, the planetary reducer has simple structure, fewer parts, coaxial input and output shafts, small volume and light weight, which helps to realize the lightweight design of the pot cover. In addition, the planetary reducer has high transmission efficiency and stable transmission action, which can further reduce the noise problem during the operation of the cooking machine.

[0015] The speed reducer further comprises a planet gear carrier, the planet gears are rotatably supported on the planet gear carrier, and the planet gear carrier is provided with an inner ring gear in meshing transmission with the planet gears.

[0016] In the technical solution, the inner ring gear is arranged on the planet gear carrier, so that the planet gears can simultaneously mesh with the sun gear and the inner ring gear during the operation of the speed reducer, the radial components of the centrifugal inertia force and the reaction force between the tooth profiles can be balanced with each other, and the impact and vibration resistance of the speed reducer is improved. Moreover, since the planet gears are uniformly distributed between the sun gear and the inner ring gear, the load is distributed to a large number of teeth during the operation, which makes the load of each gear smaller, increases the reliability of the transmission, and prolongs the service life of the planet gears and the sun gear.

[0017] The stirring shovel is detachably connected with the output shaft of the driving device.

[0018] The detachable design between the stirring shovel and the output shaft of the driving device facilitates the user to detach the stirring shovel for thorough cleaning, avoids dirt accumulation, and solves the winding problem by detaching the stirring shovel when the food cooked in the cooking process is wound on the stirring shovel and hinders the rotation of the stirring shovel.

[0019] The stirring shovel comprises an adapter and stirring blades fixed to the adapter, and the output shaft of the driving device is fixed with a hexagonal column, and the adapter is provided with a hexagonal clamping groove, and the hexagonal column is movably connected with the hexagonal clamping groove.

[0020] The movable connection between the hexagonal column and the hexagonal clamping groove enables the stirring shovel to be quickly detached and installed, facilitating the user to clean and maintain the stirring shovel. Moreover, the connection between the stirring shovel and the output shaft of the driving device through the hexagonal column and the hexagonal clamping groove can make the connection between the two more stable, reduce the jumping during stirring, and avoid the problems of affecting the stir-frying effect and damaging the stirring shovel caused by the jumping. From another perspective, the hexagonal clamping groove is arranged on the adapter to movably connect with the hexagonal column of the output shaft of the driving device, which can match stirring blades of different shapes and sizes, providing certain universality and practicality to meet the needs of different cooking materials and cooking scenes.

[0021] The stir-frying machine further comprises a box cover and a box base, and the box cover and the box base cooperatively form a cavity accommodating the worm gear and the worm.

[0022] In the technical solution, the cavity formed by the box cover and the box base can protect the components such as the worm gear and the worm placed therein from damage caused by external factors during use and transportation, and also prevent the entry of dust and foreign matter from the outside, ensuring the stability and reliability of the double helical worm and worm gear transmission. In addition, encapsulating the worm gear and the worm in the cavity can reduce the noise and vibration generated during the transmission of the worm gear and the double helical worm to some extent, improving the user experience.

[0023] The box cover and the box base are detachably connected.

[0024] In the technical solution, the box cover and the box base are detachably connected, which facilitates the maintenance of the worm gear and the double helical worm, and when the service life of the worm gear and / or the double helical worm reaches the limit, the box cover can be detached to replace the worm gear and / or the double helical worm, thereby reducing the operation and maintenance cost and prolonging the service life of the stir-frying machine.

[0025] The rotation axis of the worm gear is coaxial with the rotation axis of the stirring shovel, and the rotation axis of the worm is perpendicular to the rotation axis of the worm gear.

[0026] In this technical solution, the perpendicular rotation axes of the worm gear and worm shaft allow for more direct force transmission and provide better rigidity. This enables them to better withstand torque changes during cooking and extends their service life. The coaxial arrangement of the worm gear's rotation axis with that of the stirring spatula makes the entire transmission system more compact, saving space and contributing to the miniaturization of the pot lid design. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0028] Figure 1 This is a perspective view of a cooking machine according to one embodiment of this application;

[0029] Figure 2 This is a cross-sectional view of the pot lid according to one embodiment of this application;

[0030] Figure 3 Disassembly of the driving device and stirring spatula in one embodiment of this application Figure 1 ;

[0031] Figure 4 Disassembly of the driving device and stirring spatula in one embodiment of this application Figure 2 ;

[0032] Figure 5 This is a perspective view of a double-helix worm gear according to one embodiment of this application.

[0033] in;

[0034] 1. Pot body;

[0035] 2. Pot lid;

[0036] 3. Motor;

[0037] 4. Double-helix worm gear; 41. First helical tooth surface; 42. Second helical tooth surface; 43. First helical opening; 44. Second helical opening;

[0038] 5. Worm gear;

[0039] 6. Sun Gear;

[0040] 7. Planetary gears;

[0041] 8. Rotating parts;

[0042] 9, drive shaft; 91, hexagonal column;

[0043] 10, planetary gear carrier; 101, inner ring gear;

[0044] 11, box cover;

[0045] 12, box base;

[0046] 13, stirring shovel; 131, adapter; 132, stirring blade; 133, hexagonal clamping groove. DETAILED DESCRIPTION

[0047] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0048] In the following description, a number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced without the specific details, other than those described herein, and therefore, the scope of the present application is not limited to the specific embodiments disclosed herein. It is to be understood that the embodiments of the present application and the features thereof can be combined with each other, if not in conflict.

[0049] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0050] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0051] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0052] As shown in Figure 1 , Figure 2 and Figure 5 , a cooking machine includes a pot body 1 and a pot cover 2, the pot cover 2 is provided with a stirring shovel 13 and a driving device for driving the stirring shovel 13 to rotate, the driving device includes a motor 3, a worm shaft linked with the output shaft of the motor 3, and a worm wheel 5 in meshing transmission with the worm shaft, the worm shaft is a double helix worm 4, the double helix worm 4 includes a shaft body and a first helical tooth surface 41 and a second helical tooth surface 42 arranged on the shaft body, the first helical tooth surface 41 and the second helical tooth surface 42 are alternately meshed with the worm wheel 5, so that the driving device has a positive transmission state of the worm shaft driving the worm wheel 5 to rotate and a reverse transmission state of the worm wheel 5 driving the worm to rotate.

[0053] It should be noted that the present application does not limit the connection mode of the pot body 1 and the pot cover 2. In one embodiment, one side of the pot cover 2 is pivotally connected with the pot body 1, so as to open or cover the cooking cavity of the pot body 1 by turning over the pot cover 2. In another embodiment, the pot cover 2 is placed on the pot body 1 in a removable manner, so as to open or cover the pot body 1 by taking or placing the pot cover 2.

[0054] The helical shape of the worm in the process of worm gear transmission makes the worm teeth gradually embedded in the worm gear tooth groove with rotation. Due to the relatively large angle of the helix of the worm, the friction between the worm and the worm gear will increase accordingly. When the lead angle of the worm is less than the friction angle of the worm in contact with the worm gear, the worm gear transmission realizes self-locking, which is very useful in preventing reverse motion. However, for the frying machine, the process of disassembling the stirring shovel 13 may cause the motor 3 to reverse, so the self-locking feature of the traditional worm gear transmission makes it impossible to be applied to the frying machine. However, the worm used in the present application is a double helix worm 4, which has a first helical tooth surface 41 and a second helical tooth surface 42 on the shaft. The first helical tooth surface 41 and the second helical tooth surface 42 alternately engage with the worm gear 5 to make the driving device have a positive transmission state of the worm driving the worm gear 5 to rotate and a reverse transmission state of the worm gear 5 driving the worm to rotate, thereby well meeting the forward and reverse rotation requirements of the motor 3 in the application process of the frying machine. Moreover, the contact between the double helix worm 4 and the worm gear 5 is continuous, so the transmission process is stable, with little vibration and low noise, thus solving the technical problem of loud noise in the operation process of the existing frying machine. Furthermore, the first helical tooth surface 41 and the second helical tooth surface 42 of the double helix worm 4 alternately engage with the worm gear 5, so that the double helix worm 4 and the worm gear 5 can be more stably transmitted, reducing the load borne by a single tooth surface, thereby reducing the wear of the double helix worm 4 and the worm gear 5 and prolonging the service life of the two. In addition, the transmission structure of the double helix worm 4 and the worm gear 5 is compact and small in size, reducing the volume occupation of the pot cover 2 and facilitating the lightweight design of the pot cover 2.

[0055] As a preferred embodiment of the present application, as shown in Figure 3 、 Figure 4 and Figure 5 , the first helical tooth surface 41 and the second helical tooth surface 42 are helically wound around the same helical axis to form a double helix, and the first helical tooth surface 41 and the second helical tooth surface 42 are respectively opened at the axial end of the double helix worm 4 to form a first helical opening 43 and a second helical opening 44, respectively. The first helical opening 43 and the second helical opening 44 are symmetrically distributed at 180° on the axial end surface of the worm. In the present embodiment, the first helical opening 43 and the second helical opening 44 are symmetrically distributed at 180° on the axial end surface of the double helix worm 4. This symmetry helps to evenly distribute the load during transmission, reducing the eccentric load and thus improving the stability of the transmission, so that the double helix worm 4 and the worm gear 5 can be continuously engaged during transmission, with no obvious impact and vibration, smooth operation and low noise, thus improving the user experience.

[0056] Furthermore, the pitch between two adjacent first helical tooth surfaces 41 is equal to the pitch between two adjacent second helical tooth surfaces 42. The pitch between two adjacent first helical tooth surfaces 41 and the second helical tooth surface 42 is half the pitch between two adjacent first helical tooth surfaces 41. This design helps to evenly distribute the load on the first helical tooth surfaces 41 and the second helical tooth surfaces 42, reducing the force on individual helical tooth surfaces and reducing efficiency losses caused by local overload, thereby improving the reliability and stability of the transmission. It also helps to maintain the smoothness of the transmission process and reduce impact and vibration. From a manufacturing perspective, the differences in machining parameters can be reduced during the machining process to machine the first helical tooth surfaces 41 and the second helical tooth surfaces 42, which helps to improve machining efficiency.

[0057] In a preferred embodiment of this application, the drive device further includes a reducer that is linked to the worm gear 5, and the mixing shovel 13 is connected to the reducer for transmission.

[0058] This embodiment adds a speed reducer to the transmission between the worm gear 5 and the stirring shovel 13, which can achieve a larger transmission ratio to convert the high-speed input of the motor 3 into a low-speed output. On the one hand, it can save energy consumption, and on the other hand, it can further reduce noise and vibration in the transmission process, thereby improving the quietness and comfort of the working environment during the operation of the cooking machine and enhancing the user experience.

[0059] This embodiment does not limit the structure of the reducer, and it can adopt any of the following embodiments:

[0060] Example 1: The reducer is a helical gear reducer.

[0061] Example 2: As Figure 4 As shown, the reducer includes a sun gear 6, a plurality of planet gears 7 distributed around the sun gear 6 and meshing with the sun gear 6, and a rotating component 8 driven by the planet gears 7. The rotating component 8 is provided with a drive shaft 9 connected to the stirring shovel 13.

[0062] In this embodiment 2, a planetary reducer is used to achieve the transmission between the worm gear 5 and the stirring spatula 13. The sun gear 6 and planet gears 7 have multiple large-area 360° uniform loads on the gear contact surface, capable of withstanding larger clockwise impact loads without damaging the reducer due to excessive load, thus ensuring the reliability and stability of the drive device. Furthermore, the planetary reducer has a simple structure, fewer parts, coaxial input and output shafts, small size, and light weight, contributing to the slim design of the pot lid 2. In addition, the planetary reducer has high transmission efficiency and smooth transmission operation, further reducing noise during the operation of the cooking machine.

[0063] As a preferred example under this embodiment 2, such as Figure 4As shown, the speed reducer further comprises a planet carrier 10, the planet gears 7 are rotatably supported on the planet carrier 10, and the planet carrier 10 is provided with an inner ring gear 101 which is engaged with the planet gears 7. In the present example, the inner ring gear 101 is arranged on the planet carrier 10, so that during the operation of the speed reducer, the planet gears 7 can be engaged with both the sun gear 6 and the inner ring gear 101, and the radial components of the centrifugal inertia force and the reaction force between the tooth profiles can be balanced with each other, thereby improving the impact resistance and vibration resistance of the speed reducer. Moreover, since the planet gears 7 are uniformly distributed between the sun gear 6 and the inner ring gear 101, the load is distributed to a large number of teeth during operation, which makes the load of each gear smaller, increases the reliability of transmission, and also prolongs the service life of the planet gears 7 and the sun gear 6.

[0064] As a preferred embodiment of the present application, as shown in Figure 3 and Figure 4 As shown, the stirring shovel 13 is detachably connected with the output shaft of the driving device. In the present embodiment, the detachable design between the stirring shovel 13 and the output shaft of the driving device facilitates the user to detach the stirring shovel 13 for thorough cleaning, avoiding dirt accumulation, and also facilitates the user to quickly solve the winding problem by detaching the stirring shovel 13 when the food being cooked is wound on the stirring shovel 13 during cooking, thereby hindering the rotation of the stirring shovel 13. Furthermore, the detachable design of the stirring shovel 13 facilitates the user to individually detach and replace it, thereby reducing the operation and maintenance cost.

[0065] Specifically, the output shaft of the driving device is the transmission shaft 9 of the rotating member 8, and the stirring shovel 13 is detachably connected with the transmission shaft 9 of the rotating member 8, and the detachable connection modes thereof include but are not limited to the following embodiments:

[0066] Embodiment 3: This embodiment 3 is not shown, in which the stirring shovel comprises an adapter and stirring blades fixedly connected with the adapter, one of the adapter and the transmission shaft is provided with an internal thread, and the other is provided with an external thread matched with the internal thread, and the adapter and the transmission shaft are screwed together through the internal thread and the external thread.

[0067] Embodiment 4: As shown in Figure 3 and Figure 4As shown, the stirring shovel 13 comprises a adapter 131 and stirring blades 132 fixedly connected with the adapter 131, the output shaft of the driving device is fixedly connected with a hexagonal column 91, the adapter 131 is provided with a hexagonal clamping groove 133, and the hexagonal column 91 is movably connected with the hexagonal clamping groove 133. In this embodiment 4, the movable connection between the hexagonal column 91 and the hexagonal clamping groove 133 enables the stirring shovel 13 to be quickly disassembled and assembled, thereby facilitating the user to clean and maintain the stirring shovel 13. Moreover, the connection between the stirring shovel 13 and the output shaft of the driving device through the hexagonal column 91 and the hexagonal clamping groove 133 can make the connection between the two more stable, reduce the jumping during stirring, and avoid the problems of affecting the stirring effect and damaging the stirring shovel 13 caused by the jumping. In another aspect, the hexagonal clamping groove 133 is arranged on the adapter 131 to movably connect with the hexagonal column 91 of the output shaft of the driving device, which can match stirring blades 132 of different shapes and sizes, and provide certain universality and practicality to meet the needs of different cooking materials and cooking scenes.

[0068] The specific configuration of the stirring blades 132 is not limited in the present application, which can adopt or refer to the design of the stirring blades of the existing cooking machine.

[0069] As a preferred embodiment of the present application, as shown in Figure 3 and Figure 4 As shown, the cooking machine further comprises a box cover 11 and a box base 12, which cooperate to form a cavity accommodating the worm wheel 5 and the worm.

[0070] In this embodiment, the cavity formed by the box cover 11 and the box base 12 can protect the components such as the worm wheel 5 and the worm placed therein from being damaged by external factors during use and transportation, and can also prevent the entry of dust and foreign matter from the outside, thereby ensuring the stability and reliability of the transmission of the double helical worm 4 and the worm wheel 5. In addition, encapsulating the worm wheel 5 and the worm in the cavity can reduce the noise and vibration generated during the transmission of the worm wheel 5 and the double helical worm 4 to some extent, thereby improving the user experience.

[0071] Preferably, the box cover 11 and the box base 12 are detachably connected. By detachably connecting the box cover 11 and the box base 12, it is convenient to overhaul the worm wheel 5 and the double helical worm 4 inside, and when the service life of the worm wheel 5 and / or the double helical worm 4 reaches the limit, the box cover 11 can be disassembled to replace the worm wheel 5 and / or the double helical worm 4, thereby reducing the operation and maintenance cost and prolonging the service life of the cooking machine.

[0072] The detachable connection between the box cover 11 and the box base 12 includes but is not limited to screw connection, buckle connection, magnetic attraction cooperation, etc.

[0073] As a preferred embodiment of the present application, as shown inFigure 2 and Figure 3 As shown in the figure, the rotation axis of the worm wheel 5 is coaxially arranged with the rotation axis of the stirring shovel 13, and the rotation axis of the worm is perpendicular to the rotation axis of the worm wheel 5. The perpendicular arrangement of the rotation axis of the worm wheel 5 and the worm in the embodiment can make the force transmission more direct, can provide better rigidity, so that the torque change in the stir-frying process can be better borne, and the service life of the two is prolonged. The coaxial arrangement of the rotation axis of the worm wheel 5 and the rotation axis of the stirring shovel 13 makes the whole transmission system more compact, saves space, and thus helps the miniaturization of the pot cover 2.

[0074] The places not described in the application can be realized by using or referring to the existing technology.

[0075] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment mainly describes the difference from other embodiments.

[0076] The above only describes the embodiments of the application and does not limit the application. The technical features or structures in the different embodiments can be combined to form other specific technical solutions. The application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application shall be included in the scope of the claims of the application.

Claims

1. A cooking machine comprising a pot body and a pot cover, a stirring spatula and a driving device for driving the stirring spatula to rotate are arranged on the pot cover, characterized in that, The driving device comprises a motor, a worm gear connected with an output shaft of the motor, and a worm wheel engaged with the worm gear, the worm gear is a double helix worm gear, the double helix worm gear comprises a rod body and a first helical tooth surface and a second helical tooth surface arranged on the rod body, the first helical tooth surface and the second helical tooth surface are alternately engaged with the worm wheel, so that the driving device has a positive transmission state in which the worm gear drives the worm wheel to rotate and a reverse transmission state in which the worm wheel drives the worm gear to rotate.

2. The frying machine according to claim 1, characterized in that, the first helical tooth surface and the second helical tooth surface are helically wound around the same helical axis to form a double helix, and the first helical tooth surface and the second helical tooth surface are respectively opened at the axial end of the worm to form a first helical opening and a second helical opening, the first helical opening and the second helical opening are symmetrically distributed at the axial end surface of the worm by 180°.

3. The frying machine according to claim 1, characterized in that, the driving device further comprises a speed reducer connected with the worm wheel, and the stirring shovel is in transmission connection with the speed reducer.

4. The frying machine according to claim 3, characterized in that, the speed reducer comprises a sun gear, a plurality of planet gears distributed on the outer periphery of the sun gear and engaged with the sun gear in transmission, and a rotating member driven to rotate by the planet gears, the rotating member is provided with a transmission shaft connected with the stirring shovel.

5. The frying machine according to claim 4, characterized in that, the speed reducer further comprises a planet gear carrier, the planet gears are rotatably supported on the planet gear carrier, and the planet gear carrier is provided with an inner ring gear engaged with the planet gears.

6. The frying machine according to claim 1, characterized in that, the stirring shovel is detachably connected with the output shaft of the driving device.

7. The frying machine according to claim 6, characterized in that, the stirring shovel comprises an adapter and stirring blades fixedly connected with the adapter, the output shaft of the driving device is fixedly connected with a hexagonal column, the adapter is provided with a hexagonal clamping groove, and the hexagonal column is movably connected with the hexagonal clamping groove.

8. The frying machine according to any one of claims 1 to 7, characterized in that, the frying machine further comprises a cover and a base, and the cover and the base cooperatively enclose a cavity accommodating the worm wheel and the worm.

9. The frying machine according to claim 8, characterized in that, the cover and the base are detachably connected.

10. The frying machine according to any one of claims 1 to 7, characterized in that, the rotation axis of the worm wheel is coaxially arranged with the rotation axis of the stirring shovel, and the rotation axis of the worm is perpendicular to the rotation axis of the worm wheel.

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