Food processor

Abstract

The utility model belongs to the technical field of kitchen appliances, and discloses a food processor which comprises a stirring cup, a cutter assembly detachably installed in the stirring cup, a motor arranged below the stirring cup and a driving magnetic disk driven by the motor to rotate. A mounting cavity is defined by the upper shell and the lower shell, the shaft sleeve is located in the mounting cavity, the bearing is mounted in the shaft sleeve, the transmission shaft penetrates through the bearing, the upper end of the transmission shaft extends out of the upper shell and is connected with a blade, and a driven assembly located in the mounting cavity is fixed to the lower end of the transmission shaft. The driven assembly comprises a magnetic isolation disc fixedly connected with the transmission shaft and a permanent magnet fixedly attached to the lower surface of the magnetic isolation disc, the lower end face of the permanent magnet right faces the lower shell, and the permanent magnet is located above the driving disc and driven by the driving disc. The permanent magnet and the driving magnetic disk are strongly matched, the driven assembly and the driving magnetic disk synchronously rotate, the rotating speed difference between the permanent magnet and the driving magnetic disk is reduced, and therefore the transmission efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen appliance technology, specifically relating to a food processing machine. Background Technology

[0002] A food processor includes a base assembly containing a motor; a mixing cup assembly including a cup body and a blade assembly detachably housed within the cup body, the cup body being detachably mounted to the base assembly; a drive disk connected to the output shaft of the motor, the drive disk having multiple drive magnets surrounding the output shaft, with adjacent drive magnets having opposite magnetic poles on the side away from the output shaft; and a driven disk connected to the blade shaft of the blade assembly, the driven disk having multiple driven magnets surrounding the blade shaft, with adjacent driven magnets having opposite magnetic poles on the side away from the blade shaft. The drive disk and driven disk are nested together, and both the drive magnets and driven magnets are elongated, with one drive magnet corresponding to one driven magnet and magnetically coupled.

[0003] More specifically, the driven disk also includes: a disk bracket and an annular end cap, the annular end cap and the disk body respectively abutting the two ends of the driven magnet.

[0004] Therefore, in the existing technology, the driven magnet is firmly confined within the disk holder, and its lower end is limited by an annular end cap. Although this achieves a stable installation of the driven magnet, the structure of the driven disk is complex. Moreover, the lower end face of the driven magnet is blocked by the presence of the annular end cap, which causes the annular end cap to stand between the driven magnet and the driving magnet, increasing the distance between the driven magnet and the driving magnet. This weakens the attraction between the driven magnet and the driving magnet, resulting in poor rotational synchronization between the driven disk and the driving disk and low transmission efficiency. Utility Model Content

[0005] This invention provides a food processing machine that solves the problems of complex structure of the driven disk in the prior art, which leads to many functional structural components that need to be superimposed between the drive disk and the driven disk, resulting in weakened magnetic attraction, poor rotational synchronization, and low transmission efficiency.

[0006] The technical solution adopted in this utility model is as follows:

[0007] This utility model provides a food processing machine, including a mixing cup, a blade assembly detachably installed inside the mixing cup, a motor disposed below the mixing cup, and a drive disk driven by the motor to rotate. The blade assembly includes an upper housing and a lower housing that surround and form a mounting cavity, a bushing located in the mounting cavity, a bearing installed in the bushing, and a drive shaft passing through the bearing. The upper end of the drive shaft extends out of the upper housing and is connected to a blade. The lower end of the drive shaft is fixedly connected to a driven assembly located in the mounting cavity. The driven assembly includes a partition disk fixedly connected to the drive shaft and a permanent magnet attached to and fixed to the lower surface of the partition disk. The lower end face of the permanent magnet faces the lower housing, and the permanent magnet is located above the drive disk and driven by the drive disk.

[0008] This utility model provides a food processing machine. The driven component includes a partition disk fixedly connected to the drive shaft and a permanent magnet attached to the lower surface of the partition disk. The lower end face of the permanent magnet faces the lower housing, reducing structural obstruction between the permanent magnet and the lower housing. The permanent magnet can be as close to the lower housing as possible, thereby achieving further proximity between the permanent magnet and the drive disk. Since the drive disk drives the permanent magnet to rotate, according to Coulomb's law of magnetism, a force, i.e., repulsive or attractive force, is formed between the drive disk and the permanent magnet. The magnitude of this repulsive or attractive force is directly proportional to the product of the magnetic quantities between the drive disk and the permanent magnet, and inversely proportional to the square of the distance between them. Therefore, the smaller the further proximity between the permanent magnet and the drive disk, the greater the force between them. Thus, when the drive disk is driven to rotate by a motor, the permanent magnet and the drive disk work together strongly, achieving synchronous rotation of the driven component and the drive disk, reducing the speed difference between them, thereby improving transmission efficiency.

[0009] Furthermore, since the permanent magnet is fixed to the lower surface of the partition disk, the fixing method is simple and does not require the use of other structures for connection. This simplifies the structure of the driven component, reduces costs, and ensures maximum magnetic attraction while maintaining the feasibility of fixing the permanent magnet. Moreover, fixing the permanent magnet below the partition disk allows the partition disk to guide more of the magnetic field lines of the permanent magnet to be transmitted between the permanent magnet and the drive disk, preventing magnetic leakage and thus better enhancing the magnetic force between the driven component and the drive disk.

[0010] In a preferred embodiment, the driven component further includes a connecting sleeve, the spacer disk is fixed to the outer periphery of the connecting sleeve, and the connecting sleeve is sleeved on the drive shaft and locked by fasteners.

[0011] By setting a connecting sleeve, the driven disk formed by the disk and the permanent magnet can be installed on the outer periphery of the drive shaft. The connecting sleeve can increase the mating height between the driven disk and the drive shaft, enhance the connection strength, and achieve a reliable connection between the driven disk and the drive shaft.

[0012] In a preferred embodiment, the connecting sleeve includes a sleeve section and an installation section connected below the sleeve section. The installation section is tapered relative to the inner diameter of the sleeve section to form a stepped portion. The lower part of the drive shaft is provided with a positioning shoulder, which axially abuts against the stepped portion.

[0013] The connecting sleeve includes a socket section and a mounting section. The mounting section is used to mount the driven disk formed by the spacer disk and the permanent magnet. The socket section extends the mating height between the driven disk and the drive shaft, enhancing connection reliability. By forming a stepped section through the inner diameter contraction of the mounting section relative to the socket section, and by providing a locating shoulder on the drive shaft, axial positioning between the connecting sleeve and the drive shaft is achieved. This ensures accurate and stable installation of the driven disk, preventing axial movement and enabling sensitive and efficient transmission of the driven disk.

[0014] In a preferred embodiment, an annular groove is provided on the outer wall of the connecting sleeve, and the spacer disk is integrally injection molded into the annular groove;

[0015] Alternatively, the inner hole of the connecting sleeve through which the drive shaft passes is an irregularly shaped hole, and the drive shaft is anti-rotatingly engaged with the irregularly shaped hole.

[0016] By setting an annular groove on the outer periphery of the connecting sleeve, the partition disk and the connecting sleeve are integrally injection molded, and the permanent magnet is attached and fixed to the lower surface of the partition disk. This not only achieves a reliable connection of the driven disk, but also optimizes the magnetic field of the permanent magnet by the partition disk, so that more magnetic lines of force of the driven disk form a closed loop with the driving disk or driving device, thereby achieving sensitive driving of the driven disk and higher transmission efficiency.

[0017] By setting the inner hole of the connecting sleeve to an irregular shape, the connecting sleeve and the drive shaft are fitted together to achieve anti-rotation limit, ensuring the transmission effect of the connecting sleeve and the drive shaft, and realizing the rotation of the driven disk formed by the permanent magnet and the spacer disk, and the rotation of the blade through the drive shaft.

[0018] In a preferred embodiment, the partition disk is welded or riveted to the lower end of the drive shaft.

[0019] The lower end of the partition disk and the drive shaft are welded or riveted, eliminating the need for additional parts for fixation and reducing assembly steps. During the high-speed rotation of the partition disk, the connection structure between the partition disk and the drive shaft remains stable, preventing loosening and transmission failure.

[0020] In a preferred embodiment, the partition disk is provided with an irregularly shaped limiting hole, and the lower end of the drive shaft is inserted into the limiting hole to engage with the limiting hole to prevent rotation.

[0021] Alternatively, the lower part of the drive shaft is provided with a positioning shoulder, and the upper surface of the disk abuts against and limits the positioning shoulder.

[0022] By setting irregularly shaped limiting holes on the partition disk, the partition disk and the drive shaft can be directly sleeved together, and the drive shaft and the limiting holes are anti-rotationally engaged, preventing the two from moving during further fixing, which facilitates further fixing of the two and realizes direct fixing of the partition disk and the drive shaft.

[0023] In a preferred embodiment, the drive shaft has an upper limit portion that abuts against the upper end of the bearing and a lower limit portion that abuts against the lower end of the bearing. The blade includes a root portion connected to the drive shaft and a blade extending outward from the root portion. The root portion of the blade is separately disposed from the upper housing. More preferably, the drive shaft has an annular platform located above the upper housing, and the root portion of the blade abuts against the upper part of the annular platform.

[0024] The axial positioning of the drive shaft, bushing, and upper housing is achieved by using upper and lower limiting parts. Therefore, the root of the blade can be separated from the upper housing, thus avoiding direct wear between the blade and the upper housing, reducing frictional noise, protecting the blade and the upper housing, improving the transmission smoothness of the drive shaft, and facilitating the cleaning of material trapped between the upper housing and the blade, ensuring cleanliness and hygiene. The blade is lowered by a ring platform, employing a simple structure to separate the blade from the upper housing, reducing wear between the blade and the upper housing.

[0025] In a preferred embodiment, the upper end of the drive shaft extends through the blade and is connected to a gripper cap located above the blade.

[0026] By providing a gripper cap at the upper end of the drive shaft, users can easily pick up and put down the knife assembly, making operation convenient and safe. More preferably, the gripper cap is threadedly connected to the drive shaft, making assembly even simpler. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0028] Figure 1 This is a schematic diagram of the food processing machine in Embodiment 1 of this utility model;

[0029] Figure 2 This is a cross-sectional structural diagram of the blade assembly in Embodiment 1 of this utility model;

[0030] Figure 3 This is an exploded structural diagram of the knife assembly in Embodiment 1 of this utility model;

[0031] Figure 4 This is a schematic diagram of the cooperation between the drive shaft and the driven disk in Embodiment 1 of this utility model;

[0032] Figure 5 This is a cross-sectional structural diagram of the blade assembly in Embodiment 2 of this utility model;

[0033] Figure 6 This is a schematic diagram of the cooperation between the drive shaft and the driven disk in Embodiment 2 of this utility model;

[0034] Figure 7 This is an exploded structural diagram of the knife assembly in Embodiment 2 of this utility model;

[0035] Figure 8 This is an exploded structural diagram of the drive shaft and driven disk in Embodiment 2 of this utility model.

[0036] List of components and reference numerals: 10. Stirring cup; 20. Blade assembly; 21. Upper housing; 22. Lower housing; 23. Bushing; 24. Bearing; 25. Drive shaft; 251. Positioning shoulder; 252. Upper limit part; 253. Lower limit part; 254. Ring platform; 26. Blade; 27. Driven disk; 271. Spacer disk; 2711. Limiting hole; 272. Permanent magnet; 28. Shaft seal; 29. ​​Connecting sleeve; 291. Sleeve section; 292. Mounting section; 293. Step part; 294. Ring groove; 30. Main unit; 40. Motor; 50. Drive disk; 60. Fastener; 70. Handle cap. Detailed Implementation

[0037] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0038] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0039] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] like Figure 1-4 As shown, in one embodiment, this utility model provides a food processing machine, including a mixing cup 10, a blade assembly 20 detachably installed inside the mixing cup 10, a motor 40 disposed below the mixing cup 10, and a drive disk 50 rotated by the motor 40. Figure 2 As shown, the blade assembly 20 includes an upper housing 21 and a lower housing 22 that enclose a mounting cavity, a bushing 23 located in the mounting cavity, a bearing 24 installed in the bushing 23, and a drive shaft 25 passing through the bearing 24. The upper end of the drive shaft 25 extends out of the upper housing 21 and is connected to a blade 26. The lower end of the drive shaft 25 is fixed to a driven assembly located in the mounting cavity. The driven assembly includes a driven disk 27. The driven disk 27 includes a partition disk 271 fixedly connected to the drive shaft 25 and a permanent magnet 272 attached to and fixed on the lower surface of the partition disk 271. The lower end face of the permanent magnet 272 faces the lower housing 22. The permanent magnet 272 is located above the drive disk 50 and is driven by the drive disk 50.

[0043] Preferably, the food processor also includes a main unit 30, a mixing cup 10 fixedly or detachably mounted on the main unit 30, and a motor 40 and a drive disk 50 driven by the motor 40 to rotate located inside the main unit 30.

[0044] The food processing machine provided in the above embodiments of this utility model includes a driven component comprising a partition disk 271 fixedly connected to a drive shaft 25 and a permanent magnet 272 attached to the lower surface of the partition disk 271. The lower end face of the permanent magnet 272 faces the lower housing 22, reducing structural obstruction between the permanent magnet 272 and the lower housing 22. The permanent magnet 272 can be as close as possible to the lower housing 22, thereby achieving further proximity between the permanent magnet 272 and the drive disk 50. Since the drive disk 50 drives the permanent magnet 272 to rotate, according to Coulomb's law of magnetism, a force, i.e., a repulsive force or an attractive force, is formed between the drive disk 50 and the permanent magnet 272. The magnitude of the repulsive force or attractive force is directly proportional to the product of the magnetic quantities between the drive disk 50 and the permanent magnet 272, and inversely proportional to the square of the distance between them. Therefore, the closer the permanent magnet 272 gets to the drive disk 50, the greater the force between them. Thus, when the drive disk 50 is driven to rotate by the motor 40, the permanent magnet 272 and the drive disk 50 work together to achieve synchronous rotation of the driven component and the drive disk 50, reducing the speed difference between them and thus improving the transmission efficiency.

[0045] In addition, since the permanent magnet 272 is attached and fixed to the lower surface of the partition disk 271, the fixing method is simple and does not require the use of other structures for connection, which simplifies the structure of the driven component and reduces costs.

[0046] This invention does not limit the method of fixing the driven component, for example, it can adopt any one of the following embodiments one and two:

[0047] Implementation Method 1

[0048] like Figure 1-4 As shown, the disk 271 is integrally connected to the drive shaft 25.

[0049] Specifically, such as Figure 1 As shown, the food processor includes a mixing cup 10 and a blade assembly 20 detachably installed within the mixing cup 10. The blade assembly 20 includes an upper housing 21 and a lower housing 22 that enclose a mounting cavity, and a bushing 23 located within the mounting cavity. A bearing 24 is installed within the bushing 23. Figure 2 As shown, the blade assembly 20 also includes a drive shaft 25, a metal partition disk 271 fixed integrally with the lower end of the drive shaft 25, and a permanent magnet 272 fixed on the lower surface of the partition disk 271. The permanent magnet 272 is located in the mounting cavity. The drive shaft 25 is provided with an upper limit part 252 and a lower limit part 253. The drive shaft 25 is mounted on the bearing 24 from bottom to top. The lower limit part 253 abuts against the lower end of the bearing 24. The upper limit part 252 is detachably sleeved on the outer periphery of the drive shaft 25 and abuts against the upper end of the bearing 24. The upper end of the drive shaft 25 extends out of the upper housing 21 and is connected to the blade 26.

[0050] In this embodiment, during the assembly of the blade assembly, the bearing 24 is first press-fitted into the bushing, and then the drive shaft 25 is inserted into the bearing 24 from bottom to top and the upper limit part 252 and the lower limit part 253 are used to limit the axial position of the drive shaft. Then the upper housing 21 and the lower housing 22 clamp the bushing 23, and then the side walls of the upper housing 21 and the lower housing 22 are fixed, for example by welding, to achieve the assembly of the overall blade assembly.

[0051] Since the blade assembly 20 includes a drive shaft 25, a metal spacer disk 271 fixed integrally with the lower end of the drive shaft 25, and a permanent magnet 272 fixed on the lower surface of the spacer disk 271, the drive shaft 25 is provided with an upper limit part 252 and a lower limit part 253. The drive shaft 25 is mounted on the bearing 24 from bottom to top. The lower limit part 253 abuts against the lower end of the bearing 24. The upper limit part 252 is detachably sleeved on the outer periphery of the drive shaft 25 and abuts against the upper end of the bearing 24. The upper limit part 252 and the lower limit part 253 cooperate to achieve axial positioning of the drive shaft 25. The bearing 24 is mounted on the bushing 23. In this configuration, the two are reliably connected, and the drive shaft 25 is reliably limited along the axial direction, thereby avoiding swaying during the rotation of the drive shaft 25 and improving the working stability of the drive shaft 25. On the one hand, it reduces the surging noise that occurs during the rotation of the drive shaft 25 and lowers the overall operating noise. On the other hand, the stability of the drive shaft 25 ensures the rotational stability of the partition disk 271 and the permanent magnet 272, making the transmission of the driven disk 27 formed by the partition disk 271 and the permanent magnet 272 sensitive. When driven by the drive disk 50, the drive disk and the drive disk 50 can rotate synchronously, and the transmission is effective.

[0052] Furthermore, the combination of the partition disk 271 and the permanent magnet 272 forms the driven disk 27. Compared to the prior art, this simplifies the structure. Since the permanent magnet 272 is directly fixed to the lower surface of the partition disk 271, its lower end face is exposed directly facing the lower housing 22, reducing structural obstruction between the permanent magnet 272 and the lower housing 22. This allows the permanent magnet 272 to be as close as possible to the lower housing 22, further bringing it closer to the drive disk 50 in the food processing machine. This strengthens the interaction force between the drive disk 50 and the permanent magnet 272, enabling synchronous rotation of the driven disk 27 and the drive disk 50, reducing the speed difference between them, and thus improving transmission efficiency. Of course, this embodiment is not limited to driving via the drive disk 50.

[0053] More specifically, the partition disk 271 is welded or riveted to the lower end of the drive shaft 25.

[0054] The lower ends of the partition disk 271 and the drive shaft 25 are connected by welding or riveting, which does not require additional parts for fixation, reducing assembly steps. During the high-speed rotation of the partition disk 271, the connection structure between the partition disk 271 and the drive shaft 25 is stable and there will be no loosening or transmission failure.

[0055] In a preferred embodiment of this implementation, such as Figure 3 , Figure 4 As shown, the partition disk 271 is provided with an irregularly shaped limiting hole 2711, and the lower end of the drive shaft 25 is inserted into the limiting hole and engages with the limiting hole to prevent rotation.

[0056] By setting irregularly shaped limiting holes in the partition disk 271, the partition disk 271 and the drive shaft 25 can be directly sleeved together, and the drive shaft 25 and the limiting holes are anti-rotationally engaged, preventing the two from moving during further fixing, which facilitates further fixing of the two and realizes direct fixing of the partition disk 271 and the drive shaft 25.

[0057] In a preferred embodiment of this implementation, such as Figure 3 , 4 As shown, a positioning shoulder 251 is provided at the lower part of the drive shaft 25, and the upper surface of the spacer disk 271 abuts against and limits the positioning shoulder 251.

[0058] Specifically, the bottom end of the drive shaft 25 contracts to form a contraction section and an annular step. The annular step forms a positioning shoulder 251, and the spacer disk 271 is sleeved on the outer periphery of the contraction section and axially abuts against the annular step.

[0059] By setting irregularly shaped limiting holes in the partition disk 271, the partition disk 271 and the drive shaft 25 can be directly sleeved together, and the drive shaft 25 and the limiting holes are anti-rotationally engaged, preventing the two from moving during further fixing, which facilitates further fixing of the two and realizes direct fixing of the partition disk 271 and the drive shaft 25.

[0060] In a preferred embodiment of this invention, the permanent magnet 272 is welded or bonded to the spacer disk 271.

[0061] The permanent magnet 272 is welded or bonded to the partition disk 271 to form the driven disk 27. The structure is reliably connected. The permanent magnet 272 can be welded or bonded to the partition disk 271 before being magnetized. Alternatively, the permanent magnet can be separated so that the lower surface of the permanent magnet 272 facing the drive disk 50 has N and S poles arranged alternately in the circumferential direction, and the upper surface of the drive disk 50 has N and S poles arranged alternately in the circumferential direction. This allows the drive disk 50 to be rotated by the motor 40, while simultaneously rotating the permanent magnet 272 and the partition disk 271, which in turn rotates the blade 26.

[0062] In a preferred embodiment of this invention, the lower limit portion 253 is a limit shoulder integrally formed on the drive shaft 25; the upper limit portion 252 is a retaining ring.

[0063] The use of a limiting shoulder for positioning enhances structural strength, eliminates the need for additional parts, and reduces assembly steps. During high-speed rotation of the drive shaft 25, the limiting shoulder structure remains stable, preventing positioning failure. The use of a retaining ring for positioning is simple in structure and low in cost. The combination of the limiting shoulder and the retaining ring facilitates bottom-up installation of the drive shaft 25, ensuring reliable positioning of the drive shaft 25.

[0064] Implementation Method 2

[0065] like Figure 5-8 As shown, the partition disk 271 and the permanent magnet 272 combine to form the driven disk 27, which is fixed to the drive shaft 25 by fasteners 60. The fasteners 60 are, for example, screws or nuts.

[0066] Specifically, the food processor includes a mixing cup 10 and a blade assembly 20 detachably installed within the mixing cup 10. The blade assembly 20 includes an upper housing 21 and a lower housing 22 that enclose a mounting cavity, and a bushing 23 located within the mounting cavity. A bearing 24 is installed within the bushing 23. Figure 5 As shown, the blade assembly 20 also includes a drive shaft 25. The drive shaft 25 has an upper limit part 252 and a lower limit part 253 protruding from it. The drive shaft 25 is mounted on the bearing 24 from top to bottom. The upper limit part 252 abuts against the upper end of the bearing 24. The lower limit part 253 is detachably sleeved on the outer periphery of the drive shaft 25 and abuts against the lower end of the bearing 24. A driven disk 27 is connected to the lower end of the drive shaft 25. The driven disk 27 is fixed to the drive shaft 25 by fasteners 60. The upper end of the drive shaft 25 is located outside the upper housing 21 and is connected to the blade 26.

[0067] In the food processing machine provided in this embodiment, during the assembly of the blade assembly, the bearing 24 is first press-fitted into the bushing, and then the transmission shaft 25 is inserted into the bearing 24 from top to bottom and the axial limit of the transmission shaft is achieved by the upper limit part 252 and the lower limit part 253. Then, the upper housing 21 and the lower housing 22 clamp the bushing 23, and then the side walls of the upper housing 21 and the lower housing 22 are fixed, for example by welding, to achieve the assembly of the overall blade assembly.

[0068] By providing an upper limit part 252 and a lower limit part 253 on the drive shaft 25, and since the lower limit part 253 is detachably sleeved on the outer periphery of the drive shaft 25, during assembly, the drive shaft 25 is inserted into the bearing 24 from top to bottom. After the upper limit part 252 abuts against the upper end of the bearing 24, the drive shaft 25 is in place, achieving upper limit of the drive shaft 25. Then, the lower limit part 253 is installed on the drive shaft 25, abutting against the lower end of the bearing 24, achieving lower limit of the drive shaft 25. The upper limit part 252 and the lower limit part 253 cooperate to achieve axial limit. The bearing 24 is installed in the bushing 23, and the two are reliably connected. The drive shaft 25 is reliably limited along the axial direction, thereby avoiding wobbling during the rotation of the drive shaft 25 and improving the working stability of the drive shaft 25. On the one hand, it reduces the surging noise during the rotation of the drive shaft 25 and reduces the overall working noise. On the other hand, the stability of the drive shaft 25 ensures the rotational stability of the driven disk 27, making the drive disk 27 sensitive to transmission. When driven by the drive disk 50, the drive disk and the drive disk 50 can rotate synchronously, and the transmission is effective.

[0069] Furthermore, since the drive shaft 25 can be axially limited by the upper limit part 252 and the lower limit part 253, the blade 26 can be installed either after the drive shaft 25 is engaged with the bearing 24 or before the drive shaft 25 is inserted into the bearing 24. Regardless of how the blade 26 is installed, it only needs to be connected to the drive shaft 25 and does not need to be axially limited to the upper housing 21 or the bushing 23. This reduces wear between the blade 26 and the upper housing 21, protects the blade 26 and the upper housing 21, extends the service life of the tool assembly 20, and further reduces noise. Since a seal is usually required between the drive shaft 25 and the bushing 23 or the hole in the upper housing 21, reliable limiting of the drive shaft 25 also improves the sealing durability of the tool assembly 20.

[0070] In a preferred embodiment of this implementation, such as Figure 6 As shown, the driven component also includes a connecting sleeve 29, with a spacer disk 271 fixed to the outer periphery of the connecting sleeve 29. The connecting sleeve 29 is sleeved on the drive shaft 25 and locked by a fastener 60.

[0071] By setting the connecting sleeve 29, the driven disk 27 formed by the spacer disk 271 and the permanent magnet 272 can be installed on the outer periphery of the drive shaft 25 with the help of the connecting sleeve 29. The connecting sleeve 29 can increase the mating height between the driven disk 27 and the drive shaft 25, enhance the connection strength, and realize a reliable connection between the driven disk 27 and the drive shaft 25.

[0072] Preferably, such as Figure 6As shown, the connecting sleeve 29 includes a sleeve section 291 and an installation section 292 connected below the sleeve section 291. The installation section 292 is tapered relative to the inner diameter of the sleeve section 291 to form a stepped portion 293. The lower part of the drive shaft 25 is provided with a positioning shoulder 251, which abuts axially with the stepped portion 293.

[0073] The connecting sleeve 29 includes a socket section 291 and a mounting section 292. The mounting section 292 is used to mount the driven disk 27 formed by the spacer disk 271 and the permanent magnet 272. The socket section 291 extends the mating height between the driven disk 27 and the drive shaft 25, enhancing connection reliability. By reducing the inner diameter of the mounting section 292 relative to the socket section 291 to form a stepped portion 293, and by providing a positioning shoulder 251 on the drive shaft 25, axial positioning between the connecting sleeve 29 and the drive shaft 25 is achieved. This ensures accurate mounting height and stable installation of the driven disk 27, preventing axial movement and enabling sensitive and effective transmission of the driven disk 27.

[0074] More preferably, the outer wall of the connecting sleeve 29 is provided with an annular groove 294, and the partition disk 271 is integrally injection molded into the annular groove; wherein, the bottom wall of the annular groove is formed in a circle or square along the circumference, that is, a round hole or square hole is provided corresponding to the partition disk and fits with the bottom wall of the annular groove, and the square hole is used to realize the anti-rotation limit of the partition disk and the annular groove.

[0075] More preferably, the inner hole of the connecting sleeve 29 through which the drive shaft 25 passes is a non-circular hole, and the drive shaft 25 is anti-rotatingly engaged with the non-circular hole.

[0076] By setting an annular groove 294 on the outer periphery of the connecting sleeve 29, the partition disk 271 and the connecting sleeve 29 are integrally injection molded, and the permanent magnet 272 is attached and fixed to the lower surface of the partition disk 271. This not only achieves a reliable connection of the driven disk 27, but also optimizes the magnetic field of the permanent magnet 272 by the partition disk 271, so that more magnetic lines of force of the driven disk 27 form a closed loop with the driving disk 50 or the driving device, thereby achieving sensitive driving of the driven disk 27 and higher transmission efficiency.

[0077] By setting the inner hole of the connecting sleeve 29 as an irregular hole, i.e. a non-circular hole, such as a diamond hole, a square hole, or a serrated hole, the connecting sleeve 29 and the drive shaft 25 are fitted together to achieve anti-rotation limit, ensuring the transmission effect of the connecting sleeve 29 and the drive shaft 25, so that the drive disk 50 drives the permanent magnet 272 and the spacer disk 271 to rotate the driven disk 27, and the driven disk 27 drives the blade 26 to rotate through the drive shaft 25.

[0078] In addition, in this embodiment, the upper limit portion 252 is a limiting shoulder integrally formed on the drive shaft 25; the lower limit portion 253 is a retaining ring.

[0079] In fact, when the driven disk 27 is fixed to the lower end of the drive shaft 25 by means of the connecting sleeve 29, the connecting sleeve 29 can act as a lower limit part 253, abutting against the lower end of the bearing 24 to achieve axial limit of the drive shaft 25.

[0080] The upper limit stop 252 is integrally formed as a limiting shoulder on the drive shaft 25, improving structural strength, eliminating the need for additional parts, reducing assembly steps, and ensuring the stability of the limiting shoulder structure during high-speed rotation of the drive shaft 25, preventing positioning failure. The lower limit stop 253 uses a retaining ring to ensure lower limiting of the drive shaft 25, resulting in a simple structure and low cost. The combination of the limiting shoulder and the retaining ring facilitates top-to-bottom installation of the drive shaft 25, achieving reliable limiting of the drive shaft 25. It is understood that the upper limit stop 252 could also be a retaining ring.

[0081] Of course, in another preferred embodiment of this invention, the connecting sleeve can be omitted, and the driven disk 27 and the drive shaft 25 can be directly sleeved together. The driven disk 27 is provided with an irregularly shaped insertion hole, and the lower end of the drive shaft 25 is inserted into the insertion hole so that the driven disk 27 and the drive shaft 25 are in a non-rotating engagement.

[0082] In addition, in this embodiment, the driven disk is not limited to including a partition disk and a permanent magnet. In fact, the driven disk can also be composed of a support, a permanent magnet and an end cap. The support and the end cap are fixed at both ends of the permanent magnet to limit the position of the permanent magnet.

[0083] It should be noted that this utility model does not limit the installation method of the blade 26.

[0084] In a more preferred embodiment, based on embodiment one or embodiment two, the blade 26 includes a root connected to the drive shaft 25 and a blade extending outward from the root, with the root of the blade 26 being separately disposed from the upper housing 21.

[0085] More preferably, the drive shaft 25 is provided with an annular platform 254 located above the upper housing 21, and the root of the blade 26 abuts against the upper part of the annular platform 254.

[0086] The axial positioning of the drive shaft 25, bushing 23, and upper housing 21 is achieved by the upper limit part 252 and the lower limit part 253. Therefore, the root of the blade 26 can be separated from the upper housing 21, thereby avoiding direct wear between the blade 26 and the upper housing 21, reducing frictional noise, protecting the blade 26 and the upper housing 21, improving the transmission smoothness of the drive shaft 25, and facilitating the cleaning of material residue trapped between the upper housing 21 and the blade 26, ensuring cleanliness and hygiene. The blade 26 is lowerly limited by the ring platform 254, and the separation of the blade 26 from the upper housing 21 is achieved with a simple structure, reducing wear between the blade 26 and the upper housing 21. More preferably, a wear-resistant shim is provided above the ring platform 254, and the wear-resistant shim cooperates with the blade 26 to reduce wear.

[0087] In a preferred embodiment of the present invention, the upper end of the drive shaft 25 extends through the blade 26 and is connected to a gripper cap 70 located above the blade 26.

[0088] Preferably, the lower end of the gripper cap 70 abuts against the upper part of the blade 26 for a limiting position.

[0089] A gripper cap 70 is provided at the upper end of the drive shaft 25 to facilitate the user's loading and unloading of the knife assembly 20, making operation convenient and safe. The gripper cap 70 and the drive shaft 25 can be connected by threads or screws for easier assembly.

[0090] In a preferred embodiment of this invention, the blade assembly 20 further includes a shaft seal 28 disposed on the top of the bushing 23 and located above the bearing 24. The shaft seal 28 is in a sealing fit with the drive shaft 25, and the shaft seal 28 is clamped and fixed by the bushing 23 and the upper housing 21. By providing the shaft seal 28, the perforation positions of the drive shaft 25 and the upper housing 21 are sealed, effectively preventing water from entering the mounting cavity, protecting the structure inside the mounting cavity, ensuring reliable rotation of the driven disk 27 and the drive shaft 25, and realizing the effective rotation and crushing of the blade 26.

[0091] It should also be noted that the driving method of the driven disk 27 is not limited to the aforementioned driving method using the driving disk 50. In fact, in another preferred embodiment, the food processing machine includes a driving device for driving the driven component or the driven disk 27. The driving device is an electromagnetic coil that generates a magnetic field when energized, including a stator and a coil winding wound on the stator. The electromagnetic coil surrounds the outer periphery of the driven disk 27, driving the driven disk 27 to rotate remotely. Of course, the electromagnetic coil can also be located below the driven disk 27.

[0092] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0093] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0094] The above are merely embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A food processor comprising a mixing bowl, a blade assembly removably mounted within the mixing bowl, a motor disposed below the mixing bowl, and a drive disk rotated by the motor, characterized in that, The knife assembly comprises an upper shell and a lower shell enclosing a mounting cavity, a shaft sleeve located in the mounting cavity, a bearing mounted in the shaft sleeve, a transmission shaft sleeved in the bearing, an upper end of the transmission shaft extending out of the upper shell and connected with a blade, a lower end of the transmission shaft fixed with a driven assembly located in the mounting cavity, the driven assembly comprising a magnetic isolation disc fixedly connected with the transmission shaft and a permanent magnet fixedly attached to a lower surface of the magnetic isolation disc, a lower end surface of the permanent magnet facing the lower shell, the permanent magnet being located above the driving disc and driven by the driving disc.

2. A food processor as claimed in claim 1, characterised in that The driven assembly further comprises a connecting sleeve, the magnetic isolation disc being fixed to an outer periphery of the connecting sleeve, the connecting sleeve being sleeved on the transmission shaft and locked by a fastener.

3. A food processor as claimed in claim 2, wherein The connecting sleeve comprises a sleeving section and a mounting section connected below the sleeving section, the mounting section being contracted in an inner diameter of the sleeving section to form a stepped portion, a lower part of the transmission shaft being provided with a positioning shaft shoulder, the positioning shaft shoulder axially abutting against the stepped portion.

4. A food processor as claimed in claim 2, wherein An outer wall of the connecting sleeve is provided with an annular groove, the magnetic isolation disc being integrally injection molded in the annular groove. Alternatively, an inner hole of the connecting sleeve for the transmission shaft to pass through is a special-shaped hole, the transmission shaft being rotationally stopped in cooperation with the special-shaped hole.

5. The food processor of claim 1, wherein, The magnetic isolation disc and the lower end of the transmission shaft are welded or riveted as a whole.

6. A food processor as claimed in claim 5, wherein The magnetic isolation disc is provided with a special-shaped limiting hole, the lower end of the transmission shaft being inserted into the limiting hole and rotationally stopped in cooperation with the limiting hole. Alternatively, the lower part of the transmission shaft is provided with a positioning shaft shoulder, an upper surface of the magnetic isolation disc abutting against the positioning shaft shoulder for limiting.

7. The food processor of claim 1, wherein, The transmission shaft is provided with an upper limiting portion abutting against an upper end of the bearing and a lower limiting portion abutting against a lower end of the bearing, the blade comprising a root connected with the transmission shaft and a blade leaf extending outward from the root, the root of the blade being separately provided from the upper shell.

8. A food processor as claimed in claim 7, characterised in that The transmission shaft is provided with an annular table at a position above the upper shell, the root of the blade abutting above the annular table.

9. The food processor of claim 1, wherein, An upper end of the transmission shaft extends out of the blade and is connected with a handle cap located above the blade.

10. A food processor as claimed in claim 9, wherein The handle cap is threadedly connected with the transmission shaft.

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