Food processor

Abstract

The utility model belongs to the technical field of kitchen appliances, and discloses a food processor which comprises a stirring cup and a cutter assembly detachably installed in the stirring cup, the cutter assembly comprises an upper shell, a lower shell and a shaft sleeve, the upper shell and the lower shell define an installation cavity, the shaft sleeve is located in the installation cavity, and a bearing is installed in the shaft sleeve. The cutter assembly further comprises a transmission shaft, a metal magnetic isolation disc fixed to the lower end of the transmission shaft into a whole and a permanent magnet fixed to the lower surface of the magnetic isolation disc, the permanent magnet is located in the installation cavity, and the transmission shaft is provided with an upper limiting part and a lower limiting part in a protruding mode and installed on the bearing from bottom to top in a penetrating mode. The upper limiting part detachably sleeves the periphery of the transmission shaft and abuts against the upper end of the bearing, and the upper end of the transmission shaft extends out of the upper shell and is connected with a blade. The working stability of the transmission shaft is improved, noise is reduced, the cutter assembly structure is simplified, the acting force between the driving magnetic disc and the permanent magnet is enhanced, synchronous rotation of the driven magnetic disc and the driving magnetic disc is achieved, and 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 utilizes magnetic force to drive the blade assembly to rotate, allowing the blade assembly to be removed from the mixing cup, thus achieving thorough cleaning of the blade assembly and a good seal of the mixing cup.

[0003] The food processor includes a mixing cup assembly, which includes a cup body and a blade assembly detachably disposed within the cup body. The mixing cup assembly also includes a cup base plate, which covers the lower end of the cup body. The cup base plate extends towards the base assembly to form a mounting groove, in which the blade assembly is embedded. The cup base plate forms an overlap platform at the edge of the mounting groove. The blade assembly includes a cup cover, a blade holder, and a bearing. One end of the cup cover is closed, and the other end is open. The blade holder is sealed and installed at the open end of the cup cover. The driven disk is located within the space enclosed by the cup cover and the blade holder. The bearing is installed within the blade holder. The blade shaft passes through the blade holder and the bearing and connects to the driven disk. The periphery of the blade holder abuts against the overlap platform, and the upper surface of the periphery of the blade holder is not higher than the upper surface of the cup base plate.

[0004] In this design, the cutter shaft passes through the tool holder and bearings and connects to the driven disk until the blade connected to the top of the cutter shaft directly abuts against the tool holder or abuts against it via a shim, thus achieving axial positioning of the cutter shaft and tool holder. This results in unreliable axial positioning of the cutter shaft and tool holder relying on rotating blades or shims, causing the cutter shaft to wobble and veer. This generates significant operating noise and also causes the driven disk connected to the lower end of the cutter shaft to wobble, affecting the sensitivity of the transmission or even causing transmission failure.

[0005] Furthermore, in existing technologies, the driven disk includes a disk holder, a driven magnet, and an annular end cap, with the annular end cap and the disk body respectively abutting the two ends of the driven magnet. The driven magnet is firmly confined within the disk holder, and its lower end is limited by the 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 obstructed by the presence of the annular end cap, causing the annular end cap to stand between the driven magnet and the drive disk, increasing the distance between the driven magnet and the drive magnet of the drive disk. This weakens the attraction between the driven magnet and the drive magnet, resulting in poor rotational synchronization between the driven disk and the drive disk, and low transmission efficiency. Utility Model Content

[0006] This utility model provides a food processing machine that addresses the magnetic non-contact transmission technology. By simplifying the structure of the driven component in the blade assembly, it solves the problem of poor synchronization between the driven component and the drive disk. Furthermore, it solves the problems of axial limiting of the transmission shaft and functional failure caused by the driven disk moving axially when continuously subjected to axial force.

[0007] The technical solution adopted in this utility model is as follows:

[0008] This utility model provides a food processing machine, including a mixing cup and a blade assembly detachably installed inside the mixing cup. The blade assembly includes an upper shell and a lower shell that surround and form a mounting cavity, a bushing located in the mounting cavity, and a bearing installed inside the bushing. The blade assembly also includes a drive shaft, a metal partition disk fixed integrally with the lower end of the drive shaft, and a permanent magnet fixed on the lower surface of the partition disk. The permanent magnet is located inside the mounting cavity. The drive shaft has an upper limit part and a lower limit part protruding from it. The drive shaft passes through the bearing from bottom to top. The lower limit part abuts against the lower end of the bearing. The upper limit part is detachably sleeved on the outer periphery of the drive shaft and abuts against the upper end of the bearing. The upper end of the drive shaft extends out of the upper shell and is connected to a blade.

[0009] The food processing machine provided by this utility model includes a blade assembly comprising a drive shaft, a metal partition disk fixed integrally with the lower end of the drive shaft, and a permanent magnet fixed on the lower surface of the partition disk. An upper limit portion and a lower limit portion protrude from the drive shaft, which passes through the bearing from bottom to top. The lower limit portion abuts against the lower end of the bearing, and the upper limit portion is detachably sleeved on the outer circumference of the drive shaft and abuts against the upper end of the bearing. The upper and lower limit portions cooperate to achieve axial limiting of the drive shaft. The bearing is installed in a bushing, and the two are reliably connected. The drive shaft is reliably limited axially, thus preventing wobbling during rotation and improving its working stability. This reduces axial noise during drive shaft rotation, lowering the overall machine noise. Furthermore, the stability of the drive shaft ensures rotational stability of the partition disk and the permanent magnet, making the driven disk formed by the partition disk and the permanent magnet highly sensitive. When driven by a drive disk, the drive disk and the drive disk can rotate synchronously, resulting in effective transmission.

[0010] Furthermore, the combination of the partition disk and the permanent magnet to form the driven disk simplifies the structure compared to existing technologies. Since the permanent magnet is directly fixed to the lower surface of the partition disk, its lower end face is exposed directly opposite the lower housing, reducing structural obstruction between the permanent magnet and the lower housing. This allows the permanent magnet to be as close to the lower housing as possible, further bringing it closer to the drive disk in the food processor. This strengthens the interaction between the drive disk and the permanent magnet, enabling synchronous rotation of the driven and drive disks and reducing the speed difference between them, thereby improving transmission efficiency. In particular, the upper limit of the drive shaft abuts against the upper end of the bearing. The drive shaft transmits the force from the driven disk and the drive shaft to the bushing through the upper limit, and the bushing then transmits the force to the upper and lower housings. This allows the axial force on the drive shaft to be transmitted to the outer casing and ultimately borne by the stirring cup, preventing the permanent magnet from shifting axially under continuous axial force and causing blade assembly failure.

[0011] 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.

[0012] 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.

[0013] In a preferred embodiment, the bottom end of the drive shaft contracts to form a contraction section and an annular step, and the spacer disk is sleeved on the outer periphery of the contraction section and axially abuts against the annular step.

[0014] By fitting the partition disk onto the outer periphery of the contraction section to achieve radial limiting, and by using the annular step to achieve axial abutment limiting, the installation position of the partition disk is accurate and the installation is stable, thereby ensuring the accurate installation height of the permanent magnet. When the driving disk is used below to drive the permanent magnet in the air, the distance between the permanent magnet and the driving disk is reduced, achieving synchronous rotation and sensitive and reliable transmission.

[0015] In a preferred embodiment, the blade includes a root connected to the drive shaft and a blade extending outward from the root, the root of the blade being separately disposed from the upper housing. More preferably, the drive shaft is provided with a ring platform located above the upper housing, and the root of the blade abuts against the top of the ring platform.

[0016] Because this application utilizes an upper and lower limiting part to achieve axial positioning of the drive shaft, bushing, and upper housing, it eliminates the need for a blade for positioning. The root of the blade can be separated from the upper housing, further preventing 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 positioned lower 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.

[0017] More preferably, a wear-resistant shim is provided above the ring platform, and the wear-resistant shim and the blade are used together to reduce wear.

[0018] In a preferred embodiment, the upper end of the drive shaft is further connected to a gripper cap located above the blade, and the lower end of the gripper cap abuts and limits the contact with the upper part of the blade.

[0019] A gripper cap is installed at the upper end of the drive shaft, making it convenient and safe for users to pick up and put down the blade assembly. The lower end of the gripper cap abuts against the upper part of the blade to limit its upward movement, ensuring stable installation and preventing upward movement, thus guaranteeing stable operation.

[0020] More preferably, the gripper cap is connected to the drive shaft via a thread. This simplifies assembly.

[0021] In a preferred embodiment, the disk partition is welded or riveted to the drive shaft as a single unit;

[0022] Alternatively, the permanent magnet may be welded or bonded to the disk spacer.

[0023] 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.

[0024] The permanent magnet is welded or bonded to the partition disk to form a driven disk, which has a reliable structural connection. Moreover, the permanent magnet can be welded or bonded to the partition disk first, and then magnetized, so that the lower surface of the permanent magnet facing the drive disk has N and S poles arranged alternately along the circumference, and the upper surface of the drive disk has N and S poles arranged alternately along the circumference. This allows the drive disk to be driven by the motor to rotate, while the drive disk drives the permanent magnet and the partition disk to rotate, and in turn drives the blade to rotate.

[0025] In a preferred embodiment, the blade assembly further includes a shaft seal disposed on the top of the bushing and above the bearing, the shaft seal being in sealing engagement with the drive shaft, and the shaft seal being clamped and fixed by the bushing and the upper housing.

[0026] By setting a shaft seal, the position of the drive shaft and the perforation of the upper housing is sealed, effectively preventing water from entering the mounting cavity, protecting the structure inside the mounting cavity, ensuring the reliable rotation of the driven disk and drive shaft, and realizing the effective rotation and crushing of the blade.

[0027] In a preferred embodiment, the lower limiting portion is a limiting shoulder integrally formed on the drive shaft; or, the upper limiting portion is a retaining ring.

[0028] The use of a limiting shoulder enhances structural strength, eliminates the need for additional parts, reduces assembly steps, and ensures stability of the limiting shoulder structure during high-speed rotation of the drive shaft, preventing positioning failure.

[0029] It uses a snap ring for limiting, which is simple in structure and low in cost.

[0030] The use of a limiting shoulder and a snap ring facilitates the installation of the drive shaft from bottom to top, achieving reliable limiting of the drive shaft. Attached Figure Description

[0031] 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:

[0032] Figure 1 This is a schematic diagram of the food processing machine in Embodiment 1 of this utility model;

[0033] Figure 2 This is a cross-sectional structural diagram of the blade assembly in Embodiment 1 of this utility model;

[0034] Figure 3 This is an exploded structural diagram of the knife assembly in Embodiment 1 of this utility model;

[0035] 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;

[0036] Figure 5 This is a cross-sectional structural diagram of the blade assembly in Embodiment 2 of this utility model;

[0037] 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;

[0038] Figure 7This is an exploded structural diagram of the knife assembly in Embodiment 2 of this utility model;

[0039] Figure 8 This is an exploded structural diagram of the drive shaft and driven disk in Embodiment 2 of this utility model.

[0040] List of components and reference numerals:

[0041] 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

[0042] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] Preferably, the food processor also includes a main unit 30, a mixing cup 10 fixedly or detachably mounted on top of 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.

[0049] 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.

[0050] 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.

[0051] 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:

[0052] Implementation Method 1

[0053] like Figure 1-4 As shown, the disk 271 is integrally connected to the drive shaft 25.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] More specifically, the partition disk 271 is welded or riveted to the lower end of the drive shaft 25.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] In a preferred embodiment of this invention, the permanent magnet 272 is welded or bonded to the spacer disk 271.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] Implementation Method 2

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] More preferably, the inner hole of the connecting sleeve 29 through which the drive shaft 25 passes is an irregular hole, and the drive shaft 25 is anti-rotationally fitted with the irregular hole.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] It should be noted that this utility model does not limit the installation method of the blade 26.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] Preferably, the lower end of the gripper cap 70 abuts against the upper part of the blade 26 for a limiting position.

[0094] 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 tool assembly 20, making operation convenient and safe. The gripper cap 70 and the drive shaft 25 can be connected by a thread or screw, making assembly simpler.

[0095] 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.

[0096] 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.

[0097] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0098] 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.

[0099] The above description is merely an embodiment of this utility model and is 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 blending cup and a blade assembly removably mounted within the blending cup, characterised in that, The knife assembly comprises an upper shell and a lower shell enclosing a mounting cavity, a shaft sleeve in the mounting cavity, a bearing mounted in the shaft sleeve, a transmission shaft, a metal magnetic isolation disc fixed to the lower end of the transmission shaft, and a permanent magnet fixed to the lower surface of the magnetic isolation disc.

2. A food processor as claimed in claim 1, characterised in that The magnetic isolation disc is provided with a special-shaped limiting hole, and the lower end of the transmission shaft is inserted into the limiting hole and is rotationally stopped with the limiting hole.

3. A food processor as claimed in claim 1, wherein The bottom end of the transmission shaft is contracted to form a contraction section and an annular step, and the magnetic isolation disc is sleeved on the outer periphery of the contraction section and axially abuts against the annular step.

4. The food processor of claim 1, wherein, The knife blade comprises a root connected with the transmission shaft and a blade leaf extending outward from the root, and the root of the knife blade is separately arranged from the upper shell.

5. A food processor as claimed in claim 4, wherein the cover is arranged to be removable from the bowl. The transmission shaft is provided with a ring table above the upper shell, and the root of the knife blade abuts above the ring table.

6. A food processor as claimed in claim 1, wherein The upper end of the transmission shaft is further connected with a handle cap above the knife blade, and the lower end of the handle cap abuts and limits above the knife blade.

7. A food processor as claimed in claim 6, wherein The handle cap is connected with the transmission shaft through threads.

8. The food processor of claim 1, wherein, The magnetic isolation disc is welded or riveted with the transmission shaft as a whole. Alternatively, the permanent magnet is welded or bonded with the magnetic isolation disc.

9. The food processor of claim 1, wherein, The knife assembly further comprises a shaft seal arranged on the top of the shaft sleeve and above the bearing, the shaft seal is sealingly matched with the transmission shaft, and the shaft seal is clamped and fixed by the shaft sleeve and the upper shell.

10. The food processor of claim 1, wherein, The lower limiting part is a limiting shaft shoulder integrally formed on the transmission shaft. Alternatively, the upper limiting part is a clamping spring.

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