Food processor

Abstract

The utility model belongs to the technical field of kitchen appliances, and particularly relates to 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, a bearing is installed in the shaft sleeve, and the cutter assembly further comprises a transmission shaft. The transmission shaft is provided with an upper limiting part and a lower limiting part in a protruding mode, the transmission shaft penetrates through the bearing from top to bottom, the upper limiting part abuts against the upper end of the bearing, the lower limiting part detachably sleeves the periphery of the transmission shaft and abuts against the lower end of the bearing, the lower end of the transmission shaft is connected with a driven magnetic disc, and the driven magnetic disc is fixed to the transmission shaft through a fastener. The upper end of the transmission shaft is located outside the upper shell and connected with a blade. Working stability of the transmission shaft is improved, working noise of the whole machine is reduced, transmission of the driven magnetic disk is sensitive, when the driving magnetic disk is used for driving, synchronous rotation of the transmission magnetic disk and the driving magnetic disk is achieved, and transmission is effective.

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 blending cup assembly, which includes a cup body and a blade assembly detachably housed within the cup body. The blending 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 overlapping 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 overlapping 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, either directly or 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 move erratically. This generates significant operating noise and causes the driven disk connected to the lower end of the cutter shaft to wobble, affecting transmission sensitivity and even leading to transmission failure. In particular, compared to traditional transmission coupling designs, in non-contact magnetic transmission schemes, the driven disk is continuously subjected to the magnetic attraction of the driving disk, resulting in a significant axial force on the cutter shaft during transmission. Existing solutions rely solely on the press-fit between the cutter shaft and bearings, which can cause the cutter shaft and driven disk to move downwards, leading to malfunction of the tool assembly. Utility Model Content

[0005] This utility model provides a food processing machine that addresses the problems of unreliable axial positioning of the transmission shaft used to connect the blade and the driven disk in the prior art, which leads to high working noise, poor transmission sensitivity, or even transmission failure, as well as the problem of the driven disk moving axially when continuously subjected to axial force, resulting in functional failure.

[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 and a blade assembly detachably installed inside the mixing cup. 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, and a bearing installed inside the bushing. The blade assembly also includes a drive shaft with an upper limit portion and a lower limit portion protruding from it. The drive shaft passes through the bearing from top to bottom. The upper limit portion abuts against the upper end of the bearing, and the lower limit portion is detachably sleeved on the outer periphery of the drive shaft and abuts against the lower end of the bearing. A driven disk is connected to the lower end of the drive shaft, and the driven disk is fixed to the drive shaft by fasteners. The upper end of the drive shaft is located outside the upper housing and is connected to a blade.

[0008] This utility model provides a food processing machine. An upper limit and lower limit portion are provided on the drive shaft. Since the lower limit portion is detachably sleeved on the outer circumference of the drive shaft, during assembly, the drive shaft is inserted into the bearing from top to bottom. After the upper limit portion abuts against the upper end of the bearing, the drive shaft is in place, achieving upper limit positioning. Then, the lower limit portion is installed on the drive shaft, abutting against the lower end of the bearing, achieving lower limit positioning. The upper and lower limit portions cooperate to achieve axial positioning. The bearing is installed in a bushing, and the two are reliably connected. The drive shaft is reliably positioned axially, thus preventing swaying during rotation and improving the working stability of the drive shaft. On the one hand, it reduces the noise from surging during drive shaft rotation, lowering the overall machine noise. On the other hand, the stability of the drive shaft ensures the rotational stability of the driven disk, making the driven disk's transmission sensitive. When driven by a drive disk, the drive disk and drive disk can rotate synchronously, achieving effective transmission.

[0009] Furthermore, since the drive shaft can be axially limited by the upper and lower limit parts, the blade can be installed either after the drive shaft is fitted with the bearing or before the drive shaft is inserted into the bearing. Regardless of the installation method, the blade only needs to be connected to the drive shaft; axial limitation with the upper housing or bushing is unnecessary. This reduces wear between the blade and the upper housing, protects both, extends the service life of the blade assembly, and further reduces noise. Since a seal is typically required between the drive shaft and the bushing or upper housing perforation, reliable limiting of the drive shaft also improves the sealing durability of the blade assembly. Furthermore, the upper limit part 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 via the upper limit part, 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 driven disk and drive shaft from axially shifting under continuous axial force, which could lead to blade assembly failure.

[0010] In a preferred embodiment, the blade assembly further includes a connecting sleeve, the driven disk is fixed to the outer periphery of the connecting sleeve, the connecting sleeve is sleeved on the lower end of the drive shaft, and the fastener locks the connecting sleeve to the drive shaft.

[0011] By setting a connecting sleeve, the driven disk is fixed on the outer periphery of the connecting sleeve, and the connecting sleeve is sleeved on the lower end of the drive shaft. Therefore, the driven disk can be installed on the outer periphery of the drive shaft with the help of the connecting sleeve. The connecting sleeve can increase the mating height between the driven disk and the drive shaft, enhance the connection strength, and realize a reliable connection between the driven disk and the drive shaft.

[0012] In a preferred embodiment, the connecting sleeve includes a socket section and a mounting section connected below the socket section for mounting a driven disk. The mounting section is tapered relative to the inner diameter of the socket section to form a stepped portion, and the lower part of the drive shaft is provided with a positioning shoulder that abuts against the stepped portion.

[0013] The connecting sleeve includes a socket section and a mounting section. The mounting section is used to install the driven disk, while the socket section extends the mating height between the driven disk and the drive shaft, enhancing connection reliability. By forming a stepped section and 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 periphery of the connecting sleeve, and the driven disk is integrally injection molded into the annular groove.

[0015] Preferably, the slave disk includes a partition disk integrally injection molded into the annular groove and a permanent magnet attracted to the lower surface of the partition disk.

[0016] By creating an annular groove on the outer circumference of the connecting sleeve, the spacer disk and the connecting sleeve are integrally injection molded, and the permanent magnet is attached and fixed to the lower surface of the spacer disk. This achieves a reliable connection between the driven disk and the drive disk, and also optimizes the magnetic field of the permanent magnet on the spacer disk. This allows more magnetic lines of force from the driven disk to form closed loops with the drive disk or drive device, enabling sensitive driving of the driven disk. Furthermore, because the permanent magnet is attached to the lower surface of the spacer disk, its lower surface is directly exposed to the lower housing. Therefore, when the drive disk drives the driven disk from below, the lower surface of the permanent magnet is not obstructed by structural components, reducing the axial distance between them and resulting in a strong attraction force. This facilitates sensitive transmission, promotes synchronous rotation of the drive and driven disks, avoids speed differences, and ensures reliable transmission.

[0017] In a preferred embodiment, the top surface of the connecting sleeve abuts against the lower end of the bearing, and the connecting sleeve forms the lower limiting portion.

[0018] By using the connecting sleeve to abut the lower end of the bearing, the connecting sleeve integrates the functions of installing the driven disk and the lower limit part, realizing the structural integration of the tool assembly, simplifying the part layout of the tool assembly, simplifying the assembly process, and ensuring the stable installation of the drive shaft.

[0019] In a preferred embodiment, the upper limit portion is a limiting shoulder integrally formed on the drive shaft; or, the lower limit portion is a retaining ring.

[0020] By designing the upper limit position as an integrally formed limit shoulder on the drive shaft, the structural strength is improved, no additional parts are required, and assembly steps are reduced. During the high-speed rotation of the drive shaft, the limit shoulder structure remains stable and will not experience positioning failure.

[0021] The lower limit part uses a snap ring to ensure the lower limit of the drive shaft. The structure is simple and the cost is low.

[0022] The use of a limiting shoulder and a snap ring facilitates the installation of the drive shaft from top to bottom, achieving reliable limiting of the drive shaft.

[0023] In a preferred embodiment, the blade includes a root connected to the drive shaft and blades extending outward from the root, the root of the blade being separately disposed from the upper housing.

[0024] More preferably, the drive shaft is provided with an annular platform at a position above the upper housing, and the root of the blade abuts against the upper part of the annular platform.

[0025] Based on this application, the axial positioning of the drive shaft, bushing, and upper housing is achieved by using an upper and lower limiting part. Therefore, the root of the blade can be separated from the upper housing, thereby further 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 residue trapped between the upper housing and the blade, ensuring cleanliness and hygiene. The blade is lowered by a ring platform, and the simple structure achieves separation between the blade and the upper housing, reducing wear between the blade and the upper housing.

[0026] 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.

[0027] 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.

[0028] 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 the blade from shifting upwards.

[0029] Preferably, the gripper cap is connected to the drive shaft by a thread, making assembly simpler.

[0030] In a preferred embodiment, the driven disk is provided with an irregularly shaped insertion hole, and the lower end of the drive shaft is inserted into the insertion hole to make the driven disk and the drive shaft engage in a non-rotating engagement.

[0031] By setting irregularly shaped insertion holes on the driven disk, the driven disk can be directly fitted onto the lower end of the drive shaft. At the same time, the drive shaft and the driven disk are pre-installed after fitting together and then fixed. The two are anti-rotationally matched, making assembly simple and labor-saving. Attached Figure Description

[0032] 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:

[0033] Figure 1 This is a schematic diagram of the food processing machine in Embodiment 1 of this utility model;

[0034] Figure 2 This is a cross-sectional structural diagram of the blade assembly in Embodiment 1 of this utility model;

[0035] Figure 3 This is an exploded structural diagram of the knife assembly in Embodiment 1 of this utility model;

[0036] 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;

[0037] Figure 5 This is a cross-sectional structural diagram of the blade assembly in Embodiment 2 of this utility model;

[0038] 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;

[0039] Figure 7 This is an exploded structural diagram of the knife assembly in Embodiment 2 of this utility model;

[0040] Figure 8 This is an exploded structural diagram of the drive shaft and driven disk in Embodiment 2 of this utility model.

[0041] 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

[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 a non-circular hole, and the drive shaft 25 is anti-rotatingly engaged with the non-circular 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 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 processing machine, comprising a mixing cup and a blade assembly detachably mounted within the mixing cup, characterized in that, The blade assembly includes an upper housing and a lower housing that enclose a mounting cavity, a bushing located in the mounting cavity, a bearing installed inside the bushing, and a drive shaft. The drive shaft has an upper limit portion and a lower limit portion protruding from it. The drive shaft passes through the bearing from top to bottom. The upper limit portion abuts against the upper end of the bearing. The lower limit portion is detachably sleeved on the outer periphery of the drive shaft and abuts against the lower end of the bearing. A driven disk is connected to the lower end of the drive shaft. The driven disk is fixed to the drive shaft by fasteners. The upper end of the drive shaft is located outside the upper housing and is connected to a blade.

2. The food processing machine according to claim 1, characterized in that, The blade assembly also includes a connecting sleeve, the driven disk is fixed to the outer periphery of the connecting sleeve, the connecting sleeve is sleeved on the lower end of the drive shaft, and the fastener locks the connecting sleeve to the drive shaft.

3. A food processing machine according to claim 2, characterized in that, The connecting sleeve includes a socket section and a mounting section connected below the socket section for mounting a driven disk. The mounting section is tapered relative to the inner diameter of the socket section to form a stepped portion. The lower part of the drive shaft is provided with a positioning shoulder that abuts against the stepped portion.

4. A food processing machine according to claim 2, characterized in that, The slave disk includes a partition disk and a permanent magnet fixed to the bottom surface of the partition disk. The outer periphery of the connecting sleeve is provided with an annular groove, and the partition disk is integrally injection molded in the annular groove.

5. A food processing machine according to claim 2, characterized in that, The top surface of the connecting sleeve abuts against the lower end of the bearing, and the connecting sleeve forms the lower limiting portion.

6. A food processing machine according to claim 1, characterized in that, The upper limit section is a limit shoulder integrally formed on the drive shaft; Alternatively, the lower limit part can be a snap ring.

7. A food processing machine according to claim 1, characterized in that, The blade includes a root connected to the drive shaft and blades extending outward from the root, with the root of the blade being separately disposed from the upper housing.

8. A food processing machine according to claim 7, characterized in that, The drive shaft has an annular platform positioned above the upper housing, and the root of the blade abuts against the top of the annular platform.

9. A food processing machine according to claim 1, characterized in that, The upper end of the drive shaft is also connected to a gripper cap located above the blade, and the lower end of the gripper cap abuts and limits the movement of the blade.

10. A food processing machine according to claim 1, characterized in that, The driven disk is provided with an irregularly shaped insertion hole, and the lower end of the drive shaft is inserted into the insertion hole to make the driven disk and the drive shaft engage in a non-rotating engagement.

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