Food processor reliable in transmission

Abstract

The invention discloses a food processor reliable in transmission, and the food processor comprises a machine base which is provided with a motor and a lower magnetic disk assembly driven by the motor; the cup body is detachably installed on the machine base, and a smashing device installed on the inner side of the cup bottom is arranged in the cup body; the crushing device comprises a crushing part and an upper magnetic disc which is attracted with the lower magnetic disc assembly and is driven by the lower magnetic disc assembly to drive the crushing part to work; the lower magnetic disk assembly is provided with a first position where the smashing device is not placed and a second position where the lower magnetic disk assembly is sucked upwards from the first position to move towards the outer side of the cup bottom and is close to the outer side of the cup bottom after the smashing device is placed. The displacement of the lower magnetic disk assembly switched from the first position to the second position in the axial direction is used for absorbing the assembly tolerance and the use error of the food processor, it is guaranteed that the distance between the lower magnetic disk assembly and the upper magnetic disk is at the preset minimum, and therefore it is guaranteed that power transmission between the lower magnetic disk assembly and the upper magnetic disk is stable and reliable.

Description

Technical Field

[0001] This application relates to the field of food processing, and more particularly to a food processing machine having a base and a cup body, and employing magnetic non-contact transmission for processing. Background Technology

[0002] Existing blenders or food processors typically include a base and a detachable cup mounted on the base. The base houses a motor, and the cup contains a grinding element for pulverizing food. The motor's rotation drives the grinding element to rotate, thus pulverizing the food. Because the motor and grinding element rotate at high speed during operation, the impact from the collision between the grinding element and the food is transmitted back to the motor through connecting components, increasing vibration and noise, resulting in a poor user experience. Therefore, reducing the reaction force of the grinding element on the motor, or even eliminating the mechanical transmission between them, becomes the primary solution to vibration and noise issues.

[0003] Based on this, the applicant proposes a non-contact transmission scheme, such as the non-contact transmission soymilk maker disclosed in Chinese Utility Model Patent CN201020015043.4, which uses a magnetic non-contact upper and lower coupling between the motor and the grinding blades, including both upper-lower and lower transmission methods. Because the couplings do not directly contact each other, noise and vibration are significantly reduced during operation. Building upon this, the applicant further proposes an improved non-contact transmission scheme, such as the indirect transmission food processing machine disclosed in Chinese Invention Patent CN201120194553.7, which includes an active coupling mounted on the motor's power output shaft and a driven coupling connected to the grinding blades. The driven coupling has a certain floating space in the axial direction, allowing the grinding blades to slide appropriately in the axial direction to disengage from jammed materials and ensure normal operation. However, in this transmission method, the distance between the magnetically driven upper and lower couplings is not fixed and is also affected by product assembly, resulting in insufficient transmission power between the upper and lower couplings to support the food processing machine in achieving efficient grinding. This design allows the cup to be designed as a completely sealed structure with no mechanical connection holes at the bottom, thus better solving the leakage problem of the stirring cup.

[0004] In the prior art, a scheme utilizing magnetism for contact transmission is also disclosed, such as Chinese Utility Model Patent CN202222307890.3, which discloses a food processor including a head and a blade assembly. The head includes a motor and a magnetic drive connected to the motor, and the blade assembly includes a magnetic transmission component. The magnetic drive is an electromagnet; when energized, it becomes magnetic and magnetically attracts the magnetic transmission component, causing the motor to drive the blade to rotate within the food processor. When de-energized, the magnetic drive demagnetizes and separates from the magnetic transmission component, which then resets under the elastic force of an elastic reset component. In other words, this scheme is a transmission scheme that utilizes magnetic attraction. The magnetic drive component and the magnetic transmission component are still in contact with each other. Therefore, the impact on the stirring blade assembly will still be transmitted to the motor and the head through the magnetic transmission component and the magnetic drive component. It is not a completely mechanically isolated "non-contact" transmission scheme. Secondly, the magnetic drive component and the magnetic transmission component are directly attracted to each other, which requires them to rotate synchronously during operation. If there is a difference in their speed, relative friction will occur between the magnetic drive component and the magnetic transmission component, which will affect their normal operation. Furthermore, since the magnetic drive component and the magnetic transmission component need to be directly attracted, and the magnetic transmission component needs to further drive the stirring blade located in the blending cup assembly to rotate, the blending cup assembly must be equipped with a transmission structure that passes through the blending cup assembly. For example, a transmission shaft needs to be set to pass through the cup body or the cup lid. That is, the blending cup assembly cannot be designed as a truly completely mechanical through-hole-free scheme.

[0005] Existing technologies have not fully addressed the requirement for stable power transmission in magnetic drives, namely, achieving stable power transfer between the driving and driven couplings without physical contact. The floating blade design makes it impossible to reliably control the distance between the driving and driven couplings, significantly impacting the normal operation of the food processing machine. Summary of the Invention

[0006] The purpose of this invention is to provide a food processing machine with reliable transmission, in order to solve the technical problems in the prior art where the cup body is detachable from the machine base, resulting in large changes in the distance between the lower disk assembly and the bottom of the cup due to assembly errors and product usage errors, leading to unstable power transmission between the lower disk assembly and the upper disk, and insufficient power transmission due to mutual friction in the directly engaged magnetic drive structure.

[0007] To address the aforementioned technical problems, this application provides a food processing machine with reliable transmission. The food processing machine includes a base with a motor and a lower disk assembly driven by the motor; a cup body detachably mounted on the base, with a pulverizing device installed inside the cup bottom; the pulverizing device includes a pulverizing component and an upper disk that attracts the pulverizing component and drives it under the drive of the lower disk assembly; the lower disk assembly has a first position where the pulverizing device is not placed, and a second position where, after placing the pulverizing device, it moves upwards from the first position towards the outer side of the cup bottom and is close to the outer side of the cup bottom, with a gap between it and the outer side of the cup body.

[0008] Preferably, the food processing machine is further provided with a limiting structure, the limiting structure including a bearing disposed on the lower disk assembly, the bearing protruding from the upper end face of the lower disk assembly including a first rotating part and a second rotating part that rotate relative to each other, the first mounting part being fixedly connected to the lower disk assembly, the second rotating part protruding from the upper end face of the lower disk assembly, and the second rotating part in the second position contacting the bottom of the cup.

[0009] Preferably, the rotation center of the lower disk assembly is provided with a mounting hole for accommodating the bearing of the limiting structure. The limiting structure includes a limiting member disposed in the mounting hole. The limiting member protrudes from the upper end face of the lower disk assembly. The limiting member rotates relative to the lower disk assembly. The permanent magnet of the lower disk assembly is located on the outer periphery of the mounting hole.

[0010] Preferably, the second rotating part includes an abutment member that protrudes from the upper surface of the lower disk assembly.

[0011] Preferably, the base is further provided with a limiting device, which axially limits the lower disk assembly so that the lower disk assembly has a movable clearance in the axial direction.

[0012] Preferably, the lower disk assembly is provided with a limiting hole and a fixing member sleeved on the motor shaft. The limiting device includes a limiting hole and a fixing member disposed on the lower disk assembly and sleeved on the motor shaft. The lower disk assembly can move axially along the motor shaft and the limiting hole to form the moving gap.

[0013] Preferably, the lower disk assembly is fixedly connected to the motor, and the limiting device is disposed on the base so that the lower disk assembly and the motor can move axially relative to the base to form the moving gap.

[0014] Preferably, the base is further provided with an elastic element that pushes the lower disk assembly to move axially in the movement gap and reset it.

[0015] Preferably, the top of the base is provided with a fixing platform for mounting the cup body, the fixing platform surrounds the periphery of the lower disk assembly, the bottom of the cup body is provided with a receiving cavity for accommodating the lower disk assembly, the lower disk assembly extends into the receiving cavity and switches from a first position to a second position.

[0016] Preferably, the outer side of the cup bottom is provided with a recessed platform that is recessed into the cup body, and the lower disk assembly in the second position extends into the recessed platform.

[0017] Preferably, the magnetic poles of the upper disk and the lower disk assembly are arranged axially, and the upper end face of the lower disk assembly and the bottom of the cup are parallel planes.

[0018] Compared with the prior art, this application has at least the following technical effects:

[0019] 1. This application continues the applicant's technical direction in non-contact transmission, employing mutually magnetically attracted upper and lower disk assemblies to achieve power transmission between the motor and the crushing device, fundamentally avoiding the transmission of vibration and noise from the crushing components to the motor during operation. The crushing device is detachably mounted at the bottom of the cup, ensuring it fully conforms to the cup bottom, avoiding fluctuations in the distance between the upper disk and the cup bottom when the crushing device floats inside the cup in existing technologies, ultimately ensuring a stable and reliable distance between the upper and lower disks. Furthermore, the lower disk assembly has a first position and a second position, with the upper disk attracting the lower disk assembly from the first position to the second position close to the cup bottom. Thus, the distance between the upper and lower disk assemblies is only related to the distance from the upper disk to the cup bottom, the distance from the lower disk assembly to the cup bottom, and the thickness of the cup bottom itself, and is independent of the assembly relationship of the food processing machine. This ensures that the distance between the lower disk assembly and the upper disk is always at a stable and reliable minimum value, and also enables stable and reliable power transmission between the lower disk assembly and the upper disk without contact. The lower disk assembly is configured with a first position and a second position, typically with the first position axially lower than the second position. The first position refers to the natural state of the lower disk assembly when it is mounted on the base, without the upper disk and without any external force acting on it. Correspondingly, the second position refers to the position where, after the cup body and the pulverizing device located within the cup body are mounted on the base, the upper disk of the pulverizing device adheres to the lower disk assembly, causing the lower disk assembly to move upwards to a position close to the bottom of the cup.

[0020] Since the lower disk assembly is attracted to the upper disk from the first position to the second position, and when the lower disk assembly reaches the second position, it is only close to the bottom of the cup, that is, there is still a gap between the lower disk assembly at the second position and the bottom of the cup. Therefore, the distance between the lower disk assembly at the first position and the bottom of the cup will be "greater" than that at the second position. This distance ensures that the lower disk assembly at the first position will never directly contact the cup body. For example, when the pulverizing device is detachably installed in the cup body, and only the cup body is installed without the pulverizing device, since there is no attraction from the upper disk, the lower disk assembly is always at the first position and always has a large distance between it and the cup body to avoid the lower disk assembly affecting the cup body. A displacement is provided between the first and second positions. This displacement is greater than the sum of the product's assembly tolerances and usage deviations. Therefore, by utilizing this displacement between the first and second positions, dimensional changes caused by various factors such as the tolerances of the components themselves, the dimensional tolerance chain of the product assembly, product assembly deviations, deviations caused by different user habits, and deviations caused by product wear are absorbed. This ensures that the lower disk assembly directly abuts against the cup bottom, no longer affected by other components or operations, greatly guaranteeing that the distance between the upper and lower disk assemblies remains at a stable and reliable minimum. In other words, for different bases and cup bodies, and for food processing machines composed of different combinations, the switching between the first and second positions of the lower disk assembly can ensure a minimum distance between the lower and upper disk assemblies. It should be noted that, since the second position depends on the installation of the cup body and the crushing device, and the lower disk assembly moving upward and close to the bottom of the cup under the adsorption of the upper disk, the relative positions of the cup body and the base are not fixed due to the assembly deviation of the cup body and the base. Therefore, the second position of the lower disk assembly does not refer to a fixed specific position, but rather to the position where the lower disk assembly moves upward and is close to the bottom of the cup after the cup body and the crushing device are installed.

[0021] 2. Although various assembly errors in the food processor can be absorbed by setting the lower disk assembly to move from a first position to a second position close to the bottom of the cup, different operating methods by different users can cause significant variations in the distance between the cup body and the lower disk. This can lead to direct contact between the lower disk assembly and the bottom of the cup under extreme conditions, causing friction between them during operation and affecting the normal operation of the food processor. To minimize the distance between the lower disk assembly and the bottom of the cup while still preventing direct contact, a limiting structure is further implemented. The main purpose of this limiting structure is to provide a safe clearance between the lower disk assembly and the bottom of the cup, ensuring stable and reliable rotation of the lower disk assembly close to the bottom of the cup to drive the upper disk, without direct contact or friction with the cup body. A limiting structure is clamped between the lower disk assembly and the cup bottom. This limiting structure facilitates relative rotation, effectively controlling the distance between the lower and upper disk assemblies while avoiding large-area contact and friction between the lower disk assembly and the cup bottom. This allows the lower disk assembly to rotate stably and reliably relative to the cup bottom. Since the purpose of the limiting structure is to ensure a stable and reliable gap between the lower disk assembly and the cup bottom, when the lower disk assembly is in the first position and only the cup body is installed without the pulverizing device, the lower disk assembly will not move upwards due to the lack of magnetic attraction from the upper disk. A relatively large distance exists between the lower disk assembly and the cup bottom, and in this case, the limiting structure is not needed to maintain this distance. Therefore, when the lower disk assembly is in the first position, the limiting structure does not need to contact both the lower disk assembly and the cup bottom simultaneously. In this case, the limiting structure can be positioned on the lower disk assembly without contacting the cup bottom, or on the cup bottom without contacting the lower disk assembly. The limiting structure can also be configured as two parts, respectively disposed on the lower disk assembly and the cup bottom. In this case, although the limiting structure is simultaneously disposed on both the lower disk assembly and the cup bottom, the two parts of the limiting structure are separated from each other and do not require contact for power transmission. Therefore, it still falls within the category of not simultaneously contacting the lower disk assembly and the cup bottom. After the cup body is installed on the base and the pulverizing device is in place, the upper disk attracts the lower disk assembly upwards to the second position. It should be noted that the lower disk assembly moves from the first position to the second position by the magnetic attraction of the upper disk. Therefore, when only the cup body is installed on the base, the lower disk assembly may not necessarily switch to the second position. In this case, the pulverizing function is not required within the cup, and the lower disk assembly does not need to be close for power transmission.When the lower disk assembly is in the second position, the limiting structure contacts both the lower disk assembly and the cup bottom, and the limiting structure is sandwiched between the lower disk assembly and the cup bottom, so that there is a gap between the lower disk assembly and the cup bottom.

[0022] The limiting structure ensures that the lower disk assembly and the cup bottom maintain an optimal distance while allowing for a gap between them. This prevents the lower disk assembly from rubbing against the cup bottom during rotation, which would occur if the lower disk assembly were in direct contact. The limiting structure is directly integrated into either the lower disk assembly or the cup bottom. Whether it's the limiting structure and the lower disk assembly or the limiting structure and the cup bottom, direct assembly ensures good assembly tolerances. Furthermore, further processing can be performed after assembly to achieve even higher precision. With this design, when the cup body and crushing device are mounted on the base, regardless of how the cup body is installed, the upper disk can always attract the lower disk assembly to the second position. The limiting structure further ensures that while the lower disk assembly is extremely close to the bottom of the cup, a gap still exists between them. The ultimate goal is to achieve a controllable minimum distance between the upper and lower disk assemblies, thereby maximizing the magnetic interaction force between them. This allows the motor torque to be transferred from the lower disk assembly to the upper disk to the maximum extent, ensuring sufficient torque for crushing and cutting. This solves the problem of vibration and noise transmission during direct mechanical contact between the motor and the crushing components, while also ensuring power transmission between them, thus providing users with a food processor that offers low noise and stable, reliable power transmission.

[0023] 3. By utilizing the bearing to withstand the relative rotation between the lower disk assembly and the cup bottom, stable and reliable power transmission is achieved while minimizing the distance between the lower disk assembly and the cup bottom. Furthermore, the bearing includes a first rotating part and a second rotating part. The first rotating part is fixedly connected to the lower disk assembly, and the second rotating part protrudes from the upper end face of the lower disk assembly. The height of the bearing protruding from the lower disk assembly limits the gap between the upper end face of the lower disk assembly and the cup bottom. Thus, when the lower disk assembly is in the second position, the second rotating part of the bearing directly abuts against the cup bottom, creating a gap between the upper end face of the lower disk assembly and the cup bottom. This prevents direct friction between the lower disk assembly and the cup bottom when the lower disk assembly rotates. The bearing is directly mounted on the lower disk assembly, with only a single-level mounting structure between them. This facilitates control of the fit dimensions between the lower disk assembly and the bearing, reliably controlling the bearing's protrusion from the upper end face of the lower disk assembly, and ultimately controlling the gap between the lower disk assembly and the cup bottom, ensuring a stable, reliable, and minimal distance between the lower disk assembly and the upper disk.

[0024] 4. A mounting hole is provided at the rotation center of the lower disk assembly. The bearing is placed inside the mounting hole, and the permanent magnet of the lower disk assembly is arranged around the outer periphery of the bearing. The permanent magnet can be close to the bottom of the cup without directly contacting it. This ensures that the distance between the lower disk assembly and the permanent magnet and the permanent magnet of the upper disk are sufficiently small and stable and reliable under the control of the bearing. The bearing at the rotation center of the lower disk assembly does not need to have an excessively large diameter. When the lower disk assembly rotates at high speed, the linear velocity of the bearing itself will not be too high, ensuring that the bearing can withstand higher rotational speed requirements. The permanent magnet surrounding the outer periphery of the bearing has a large diameter and circumference, allowing for a larger volume within the same thickness. This increases the magnetic flux of the permanent magnet, enhances the magnetic force between the lower disk assembly and the upper disk, and achieves stronger torque transmission. Furthermore, the permanent magnets of the upper and lower disk assemblies are arranged with their magnetic poles facing each other to ensure the strongest magnetic force between them. At this time, the permanent magnets surround the outer periphery of the bearing, which avoids the permanent magnets directly facing the bearing and thus avoiding the application of a large magnetic attraction force to the bearing, which would affect the stable and reliable operation of the bearing itself.

[0025] 5. Generally, standard bearings are selected to reduce costs. However, the arrangement structure of the first and second rotating parts of the standard bearing, as well as the protrusion height of the second rotating part relative to the upper surface of the lower disk assembly, may not fully meet the specific requirements of the food processing machine. Preferably, an abutment is provided in the second rotating part. When the lower disk assembly is in the second position, the abutment contacts the bottom of the cup. In this way, the distance between the lower disk assembly and the bottom of the cup can be controlled by the abutment. In particular, after the bearing is assembled into the lower disk assembly, the height of the abutment protruding from the lower disk assembly can be more precisely controlled by machining the abutment, thereby precisely controlling the distance between the lower disk assembly and the bottom of the cup. The switching of the lower disk assembly from the first position to the second position is instantaneously achieved through the installation of the upper disk. Due to the high relative speed, there will be an impact between the lower disk assembly and the cup bottom. For example, when both the bearing and the cup bottom are made of metal, the hard impact will cause significant vibration and may deform the lower disk assembly or the cup bottom over time. Preferably, the abutment is made of plastic to provide some cushioning and prevent direct hard impact. Furthermore, although the bearing bears the relative rotation between the lower disk assembly and the cup bottom, avoiding friction, and the abutment does not rotate relative to the cup bottom during contact, the abutment may wear out during the lifespan of the food processor because it is subjected to the magnetic force between the lower and upper disk assemblies for extended periods. In this case, replacing the abutment directly avoids replacing other, more expensive parts, achieving low-cost lifecycle maintenance.

[0026] 6. As mentioned above, the lower disk assembly is configured with a first position and a second position to optimize the distance between the lower disk assembly and the upper disk, ensuring that the distance between them is kept to a controllable minimum. However, it is also necessary to avoid direct contact and friction between the lower disk assembly and the cup body when the lower disk assembly switches from the first position to the second position. By providing a limiting device on the base, the limiting device can axially limit the lower disk assembly, allowing it to have a axial movement clearance. Thus, when the cup body is mounted on the base, the lower disk assembly moves from the first position to the second position, and the limiting device can prevent excessive displacement of the lower disk assembly. The movement clearance is used to control the amount of displacement of the lower disk assembly from the first position to the second position. This ensures that the lower disk assembly is close to the upper disk while preventing direct contact between the lower disk assembly and the cup body, thus ensuring the stability and reliability of the lower disk assembly during operation.

[0027] 7. A limiting hole and a fixing member are provided on the lower disk assembly to form a limiting device, which allows the lower disk assembly to be easily and directly installed on the motor shaft. Simultaneously, the lower disk assembly can be configured with a movement gap to allow it to switch between a first position and a second position. When the pulverizing device is installed, the lower disk assembly can switch from the first position to the second position under the adsorption of the pulverizing device for efficient transmission. When the food processor stops working and the cup and pulverizing device are removed, the lower disk assembly can quickly return from the second position to the first position under its own gravity. Since it relies solely on the vertical position switching of the lower disk assembly, and the lower disk assembly only needs axial displacement to move to the second position, while the motor drives the lower disk assembly through circumferential drive (e.g., a flat shaft or D-shaped shaft is used between the motor and the lower disk assembly), this design achieves efficient transmission. Simultaneously, when the lower disk assembly switches between the first and second positions, the motor is always in a non-operating state. For example, when the cup and the crushing device are placed, the food processor and the motor are stopped, and the lower disk assembly can quickly switch from the first position to the second position. When the food processor finishes its work and the user needs to pick up the cup, the motor has already finished its work and is also stopped. Therefore, after picking up the cup and the crushing device, the lower disk assembly can also quickly switch from the second position to the first position. Even if the cup is abnormally picked up during the operation of the food processor, due to the safety features of the food processor itself, the base will cut off the power to the motor in time after the cup is picked up, causing the motor to stop working. The lower disk assembly can also reset in time after the motor stops. Relying on the limiting hole and the fixing component to limit the lower disk assembly, it is ensured that the lower disk assembly will not directly contact the bottom of the cup, but can be maintained in the second position, that is, the distance from the cup is reduced, while ensuring that the distance is controllable, and the lower disk assembly can stably and reliably transmit power to the upper disk.

[0028] 8. Preferably, the lower disk assembly is fixedly connected to the motor. Further, the motor is movably mounted on the base, and the limiting device is disposed on the base. For example, the limiting device may be a motor mounting post of the base, or a mounting platform of the base. Alternatively, the base may include an upper cover and a lower cover, which clamp the motor and form the limiting device. The limiting device has a moving clearance for the lower disk assembly and the motor to move axially together, allowing the motor and the lower disk assembly to switch between a first position and a second position as a single unit. Typically, the motor itself requires high machining precision to ensure stable and reliable operation. By fixing the lower disk assembly to the motor, the precision between the lower disk assembly and the motor is also guaranteed. This allows the motor and the lower disk assembly to form a high-precision integral component. Movably mounting this integral component within the base and switching between the first and second positions ensures controllable distance between the lower disk assembly and the upper disk, as well as stable and reliable operation between the motor and the lower disk assembly. The motor and the lower disk assembly move axially together by a limiting device provided on the base, which also allows the lower disk assembly to reduce the distance from the upper disk while maintaining a stable and reliable transmission position.

[0029] 9. A further elastic element is provided to push the lower disk assembly in axial displacement and reset, so that when the lower disk assembly is freed from external force, it can promptly reset from the second position to the first position. When the cup and the crushing device are removed, the lower disk assembly can switch from the second position to the first position under the pushing action of the elastic element. Although the lower disk assembly can ensure the minimum distance between itself and the upper disk in the second position, the food processor does not only have the function of requiring the crushing device to work. For example, the food processor may not install the crushing device and may only rely on the heating function of the cup to achieve heating and cooking; or, the food processor may switch between different cups and different crushing devices. During the installation of different cups, when the lower disk assembly moves upward from the first position, it will have different second positions. If the lower disk assembly does not reset, interference will occur between the lower disk assembly and the cup under different functions and different cups, thus affecting the normal and reliable operation of the lower disk assembly and the cup.

[0030] 10. A fixing platform for mounting the cup body is provided at the top of the base, and the fixing platform surrounds the lower disk assembly. On the one hand, the fixing platform can be used to protect the lower disk assembly from collisions with the cup body or other objects when the lower disk assembly is directly exposed; on the other hand, the fixing platform facilitates the formation of a positioning reference concentric with the lower disk assembly. When the cup body is mounted on the base via the fixing platform, the fixing platform limits the concentricity between the cup body and the lower disk assembly. Simultaneously, a receiving cavity is provided at the bottom of the cup body. When the cup body is mounted on the base, the lower disk assembly can extend into the receiving cavity and switch from a first position to a second position. The receiving cavity serves to limit and guide the lower disk assembly, facilitating better alignment between the lower disk assembly and the pulverizing device placed inside the cup body, thereby ensuring better transmission between the lower disk assembly and the upper disk.

[0031] 11. A recessed platform is formed on the outer side of the cup bottom. Preferably, the recessed platform forms a top surface on the top of the outer side of the cup bottom that mates with the lower disk assembly. The area of ​​this top surface is set to be smaller than the area of ​​the cup body. This top surface provides better flatness for mating with the lower disk assembly. The edge of the recessed platform also increases the strength of the bottom of the cup body, further preventing deformation of the top surface of the recessed platform from affecting the distance between the lower disk assembly and the upper disk. The lower disk assembly extends into the recessed platform, and the limiting structure is located between the top surface of the recessed platform and the lower disk assembly. This ensures the distance between the lower disk assembly and the upper disk while also appropriately limiting the lower disk assembly, ensuring that the lower disk assembly is always in the optimal alignment position with the upper disk.

[0032] 12. A cup bottom is sandwiched between the lower disk assembly and the upper disk. The lower disk assembly and the upper disk are magnetically attracted to each other to achieve power transmission. The magnetic poles of both the upper disk and the lower disk assembly are arranged axially to ensure a sufficiently large magnetic attraction between them, thus ensuring stable and reliable power transmission. Therefore, the lower disk assembly and its upper surface are parallel to the cup bottom. This reduces the distance between the lower disk assembly and the cup bottom, ensuring magnetic force transmission. Furthermore, the parallel plane allows the cup to easily move the lower disk assembly from the first position to the second position after installation, and also ensures a more even magnetic force on the lower disk assembly. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of a first embodiment of a food processing machine with reliable transmission according to the present invention.

[0034] Figure 2This is an exploded view of the upper and lower disk assembly structure of the first embodiment of the reliable transmission food processing machine of the present invention.

[0035] Figure 3 This is a cross-sectional view of the upper and lower disk assemblies of the first embodiment of the food processing machine with reliable transmission according to the present invention.

[0036] Figure 4A This is a schematic diagram of the disk assembly in the first position state under the first embodiment of the food processing machine with reliable transmission according to the present invention.

[0037] Figure 4B This is a schematic diagram of the disk assembly in the second position state under the first embodiment of the food processing machine with reliable transmission according to the present invention.

[0038] Figure 5 for Figure 4B A magnified view of part A in the image.

[0039] Figure 6 This is a diagram showing the distance and magnetic force distribution between the upper and lower disk assemblies of the food processing machine with reliable transmission as described in this invention.

[0040] Figure 7 This is a cross-sectional view of the upper and lower disk assemblies of the second embodiment of the food processing machine with reliable transmission according to the present invention.

[0041] Figure 8 This is a cross-sectional view of the upper and lower disk assemblies of the second embodiment of the food processing machine with reliable transmission according to the present invention.

[0042] Figure 9A This is a schematic diagram of the disk assembly in the first position state under the second embodiment of the food processing machine with reliable transmission according to the present invention.

[0043] Figure 9B This is a schematic diagram of the disk assembly in the second position state under the second embodiment of the food processing machine with reliable transmission according to the present invention.

[0044] Figure 10 This is a schematic diagram of the base structure of the third embodiment of the food processing machine with reliable transmission according to the present invention.

[0045] The labels in the diagram correspond to the following names:

[0046] 100. Base; 101. Upper housing; 102. Lower housing; 103. Motor screw; 110. Cup body; 111. Cup bottom; 112. Settled platform; 113. Settled groove; 120. Positioning ring; 121. Positioning groove; 2. Motor; 21. Motor shaft; 211. Limiting post; 22. Locking screw; 23. Return spring; 24. Motor mounting bracket; 3. Lower disk; 31. Lower disk body; 311. Limiting hole; 312. Mounting hole; 313. Mounting cavity; 32. Lower magnet; 33. Lower cover plate; 4. Crushing device; 41. Upper disk; 42. Upper magnet; 43. Fixing shell; 431. Shell bottom; 432. Fixing cavity; 434. Upper bearing; 435. Shaft seal; 44. Cutter shaft; 45. Crushing component; 5. Limiting structure; 51. Bearing; 511. Outer ring; 512. Ball bearing; 513. Inner ring; 52. Abutment component. Detailed Implementation

[0047] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0048] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0049] Furthermore, it should be understood that in the description of this application, terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this application 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, and therefore should not be construed as a limitation of the present invention. Positional relationships such as "upstream" and "downstream" are based on the positional relationships during normal fluid flow.

[0050] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0051] In this application, unless otherwise expressly 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 invention according to the specific circumstances.

[0052] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an 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 application. 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 can be combined in any suitable manner in one or more embodiments or examples.

[0053] Food processors such as blenders, food processors, and soy milk makers typically rely on a motor to drive a grinding element that collides with and cuts the ingredients placed inside the container, thus pulverizing them. Currently, in blenders, the motor speed often exceeds 10,000 rpm during operation. During the collision and cutting process between the grinding element and the ingredients, discontinuous and random impacts occur, generating vibrations and noise. These vibrations are transmitted back to the motor and the machine base, causing significant vibration and noise in these components as well. As a technology leader in food processors, the applicant is continuously exploring solutions to the problems of motor vibration and noise.

[0054] As mentioned earlier, the applicant proposed a non-contact transmission method to achieve power transmission between the motor and the crushing component, thereby severing the mechanical connection between the motor and the crushing component and preventing the vibration and impact of the crushing component from acting on the motor. Specifically, this includes an upper coupling and a lower coupling, both of which may include permanent magnets, or one coupling may contain a permanent magnet while the other is a magnetic metal disk. However, this non-contact transmission scheme still has many technical problems. According to Coulomb's law, the interaction force between two magnets is F = k × (m1 × m2) / r. 2Where k is the Coulomb constant, m1 and m2 are the magnetic charges of the two magnets, and r is the distance between the two magnets. As can be seen above, to ensure the interaction force between the upper and lower couplings of the two non-contact permanent magnets, the magnetic charges of the two permanent magnets can be increased, or the distance between the two magnets can be compressed. Furthermore, since the interaction force is inversely proportional to the square of the distance between them, the interaction force decreases rapidly as the distance increases.

[0055] As can be seen from the above, although the non-contact transmission scheme can completely isolate the vibration transmission between the motor and the crushing blades, the applicant's product application practice has revealed the following technical problems with the non-contact transmission scheme: the non-contact upper and lower couplings rely on the magnetic interaction force between them to achieve power transmission, but the magnetic interaction force between the upper and lower couplings is limited by the distance between them; when the distance between them increases, the interaction force decreases rapidly. In existing soymilk makers or blenders, the base and cup body are assembled from different parts. Each part itself has manufacturing tolerances during the production process, and the tolerances of multiple parts will accumulate into a dimensional tolerance chain during assembly, resulting in a very large tolerance range in the finished product. Taking the base as an example, the cup body is placed on the casing, and the power transmission between the base and the cup body is connected by the lower and upper couplings. The lower coupling is connected to the motor shaft. The motor is mounted on a fixed post in the housing via a motor bracket. A shock-absorbing pad is clamped between the motor bracket and the fixed post, and the motor bracket is locked to the fixed post with screws. Therefore, between the mating surface of the top cup body of the housing and the lower and upper couplings, multiple tolerances of various components and assembly structures are superimposed. With the top of the housing as the reference plane, the lower coupling has a large axial tolerance range. This tolerance range results in poor distance stability between the upper and lower disk assemblies. Further compounded by the dimensional chain tolerances of the cup body itself, the distance between the upper and lower disk assemblies varies significantly between different products. For permanent magnets with the same magnetic charge, increasing the position causes a rapid attenuation of the interaction force, thus affecting the normal operation of the upper disk and the crushing parts.

[0056] Furthermore, different cups and bases will have positional deviations when combined; and different users will have different placement positions of the cups when picking them up or installing them; after prolonged use, wear and tear on the product itself will further increase the dimensional errors between the cups and bases. The combination of these factors will lead to uncertainty in the position of the upper and lower disk assemblies, thus affecting the normal operation of the upper disk and the shredder.

[0057] When directly replacing the traditional upper and lower couplings with those equipped with permanent magnets on the basis of existing food processing machines, the existing fixed structure means that the distance between the upper and lower couplings is usually fixed. Therefore, the interaction force between the upper and lower couplings is generally increased by increasing the magnetic charge intensity of the two permanent magnets. However, when the spatial structure limit of the existing food processing machine is reached, it is no longer possible to simply increase the interaction force by increasing the magnetic charge intensity of the permanent magnets. Therefore, how to reduce the distance between the upper and lower couplings has become the main technical direction.

[0058] However, existing food processors, such as blenders, have multiple mounting components between the upper and lower couplings. The dimensional tolerances of these components and their dimensional chains all cause variations in the distance between them. Similar to adding magnetic charge, when the preset dimensions between the upper and lower couplings reach their limits, the product's own dimensional tolerances significantly affect the interaction force between them. Especially when the bottom of the cup is sealed, and the upper coupling with a permanent magnet and the pulverizing components are detachably installed inside the cup, the upper and lower couplings are more often in an uncontrollable state, greatly affecting the reliability of the distance between them and making the interaction force highly variable. For example, when operating the food processor, users cannot guarantee that the cup will always be placed in the optimal position on the base. Furthermore, wear and tear on various components after prolonged use will affect the fit between the cup and the base, thus affecting the mating distance between the upper and lower couplings.

[0059] Due to the aforementioned technical issues, non-contact transmission technology using permanent magnets has not been widely applied in products. Although the applicant has further optimized the transmission methods of existing contact-type upper and lower couplings—for example, the applicant discloses a quiet blender in Chinese invention patent CN202410217067.4, which absorbs the shaking of the cup assembly and reduces vibration and noise by setting the cup assembly and motor to float relative to each other—and in Chinese utility model patent CN202320044237.4, which discloses a food processing machine with stable transmission by adding an elastic pad between the upper and lower couplings to reduce the impact of crushing within the cup being transmitted from the upper coupling to the lower coupling. However, such technical solutions still have shortcomings: Firstly, this transmission is still a direct contact mechanical transmission. Regardless of the shock-absorbing pad structure, the impact of crushing food inside the cup will be transmitted to the lower coupling through the upper coupling. Secondly, whether the cup floats, the motor floats, or both are relatively floating, it is only to weaken the vibration between them. However, since their positions are uncertain in the floating state, the upper and lower couplings constantly change their axial fit during operation, which increases the impact between them. Furthermore, as mentioned earlier, the magnetic contact transmission scheme directly transmits vibration and noise, and the friction between the magnetic drive and magnetic transmission components due to the speed difference between them accelerates their wear.

[0060] In existing technologies, both non-contact magnetic transmission and contact mechanical transmission solutions employ a "floating" mating structure, utilizing floating space to mitigate the impact generated by the absorbing components. In other words, the readily conceivable solutions in existing technologies all rely on floating space and relative positional changes during operation to address vibration transmission between the upper and lower couplings. However, as the aforementioned analysis shows, a floating configuration does not truly improve vibration and noise levels. Furthermore, the floating configuration causes changes in the distance between the upper and lower disk assemblies, affecting their interaction force. Moreover, existing magnetic non-contact technologies cannot guarantee a controllable distance between the driving and driven couplings. While contact is necessary to minimize the distance between the magnetic drive and transmission components, resulting in the active and driven disks being in close contact, the effectiveness of magnetic non-contact transmission is lost. Thus, although magnetic non-contact transmission solutions effectively isolate mechanical vibration, the unstable power transmission affects the crushing effect, ultimately preventing the widespread adoption of magnetic non-contact transmission solutions.

[0061] Based on this, the applicant, building upon the non-contact transmission solution, breaks away from the conventional simple floating installation method and adopts a position-changeable setting to ensure a controllable minimum distance between the lower disk assembly and the upper disk, while also avoiding mutual friction between them. First, the pulverizing device is positioned at the bottom of the cup body, ensuring close contact between the pulverizing device and the cup bottom, thus reducing the distance between the upper disk within the pulverizing device and the cup bottom. Then, the lower disk assembly is positioned so that, after the cup body is installed, it moves upwards to a second position, close to the bottom surface of the cup, under the suction of the upper disk. In this way, both the lower and upper disks are positioned relative to the cup bottom, and the distance between them is no longer affected by the assembly and installation of the cup body and base, allowing the distance between them to be controlled at a controllable optimal value, fully guaranteeing power transmission between them. The axial displacement of the lower disk assembly creates a first position and a second position. The displacement of these two positions absorbs various dimensional error chains of the product, ensuring the lower disk assembly better contacts the cup bottom. The first position refers to the natural position of the lower disk assembly when it is installed on the base, i.e., the position of the lower disk assembly under its own weight and the weight of the motor connected to it when not affected by external factors such as the upper disk. When the cup and crushing device are placed, the lower disk assembly can be attracted and moved upwards to a second position close to the bottom of the cup under the action of the cup and crushing device. It is worth noting that if the first position of the lower disk assembly is exactly close to the bottom of the cup, the second position of the lower disk assembly coincides with the first position, meaning the lower disk assembly will not shift. Since the lower disk assembly is always in the second position during the operation of the food processor, it will not experience the "floating" displacement seen in existing technologies. This ensures stable and reliable torque on the upper disk and avoids vibration and noise generated when the upper and lower disk assemblies float.

[0062] Based on the stable and reliable installation of the pulverizing device, especially the upper disk, at the bottom of the cup body, this application provides a food processing machine with reliable transmission. This addresses the technical problems of unstable and unreliable distance between the upper and lower disk assemblies due to factors such as product assembly tolerances, user operating habits, errors from different cup and base combinations, and wear during normal use of the food processing machine, as well as the relative friction caused by direct adsorption between magnetic drive components. The food processing machine includes a base, a cup body, and a pulverizing device. The base houses a motor and a lower disk assembly driven by the motor. The cup body is detachably installed on the base. The lower disk assembly is installed inside the cup bottom. The pulverizing device can be fixed to the inside of the cup bottom, or it can be detachably installed inside the cup bottom. This allows the pulverizing device to be installed when needed and removed when not needed, for example, when cleaning the cup body for easy cleaning of both the cup body and the pulverizing device. Preferably, since the food processor uses a non-contact transmission method, the bottom of the cup completely seals the bottom of the cup, eliminating the need for through holes at the bottom to connect with the outside. This improves the sealing effect of the cup, preventing leakage during operation and avoiding liquid entry into the cup during cleaning. For example, the sidewall of the cup is integrally formed with the bottom, or the bottom is a closed, integral structure, sealed and fixedly connected to the sidewall of the cup. The pulverizing device includes a pulverizing component and an upper disk. The upper disk attracts the lower disk assembly and, driven by the lower disk assembly, drives the pulverizing component to perform pulverizing processing. Preferably, the food processor also typically includes a heating device, which works in conjunction with the pulverizing device to pulverize and cook the ingredients placed in the cup.

[0063] The lower disk assembly is configured with an axial displacement, allowing it to switch between a first position and a second position. When the cup is installed onto the base, and the cup and the crushing device are in place, the lower disk assembly moves to the second position under the suction of the upper disk. This action is completed immediately after the cup is installed, ensuring that the lower disk assembly remains in the second position throughout the operation of the food processor. The displacement between the first and second positions directly absorbs dimensional deviations in the food processor, particularly between the lower disk assembly and the cup bottom. These deviations include assembly tolerances of the base, cup assembly tolerances, fit errors between the cup and base, user operational errors, errors in different cup components, and wear errors in the product. This ensures that regardless of how different cups are installed or used, the cup bottom and the lower disk assembly remain at a preset distance. Furthermore, during the operation of the food processor and prolonged use, the lower disk assembly and the cup bottom maintain this preset distance, resulting in stable and reliable power transmission between the lower disk assembly and the upper disk.

[0064] Specifically, such as Figures 1-10 As shown, this application provides a food processing machine with reliable transmission. The food processing machine includes a base 100 and a cup body 110. The base 100 is provided with a motor 2 and a lower disk assembly 3 driven by the motor 2. The cup body 110 is detachably installed on the base 100. Preferably, the upper end of the base 100 is provided with a support platform, and the cup body 110 is placed on the support platform. The motor 2 is located in the base 100, and the lower disk assembly 3 extends out of the base 3 and is located at the support platform. The cup body 110 is equipped with a pulverizing device 4, which is detachably installed inside the cup body 110 and located on the inner side of the cup bottom. The pulverizing device 4 includes a pulverizing element 45 and an upper disk 41. Both the upper disk 41 and the lower disk assembly 42 include permanent magnets, allowing them to attract and transmit power to each other. When the lower disk assembly 3 is driven by the motor 2, it drives the upper disk 41 to be placed and ultimately drives the pulverizing element 45 to work, thereby cutting and pulverizing or stirring the food placed in the cup body. Optionally, the pulverizing device 4 can also be fixed to the inner bottom surface of the cup body 110, wherein the upper disk and the pulverizing element can be rotatably arranged at the bottom of the cup. The lower disk assembly relies on the attraction of the upper disk. When the lower disk assembly is not rotating, it moves axially from a first position to a second position close to the bottom of the cup. The displacement between the first and second positions is used to absorb various error dimensional chains of the product, ensuring that the lower disk assembly is closer to the bottom of the cup.

[0065] The food processing machine includes a base and a cup body. The base typically includes a housing with a mounting platform on top for placing the cup body. The motor is installed inside the housing, and a mounting and fixing structure is provided between the motor and the housing. The motor also includes a stator, rotor, and motor shaft. The lower disk assembly is mounted on the motor shaft and typically passes through the housing along with the motor, located at the mounting platform, to mate with the upper disk inside the cup body. Multiple components of the base have manufacturing tolerances, and the corresponding mounting structures also have installation tolerances. From the mounting platform of the housing to the lower disk assembly, there are multiple tolerances for the components and their mating. These dimensional chains of superimposed tolerances result in significant dimensional deviations between the mounting platform and the lower disk assembly for different products. Furthermore, the cup body also includes multiple components such as the cup body, knife holder, and cup base. When the cup body is assembled with the knife holder, cup base, etc., there are also superimposed dimensional chains. When the cup body is installed on the base, the dimensional chain between the cup base and the lower disk assembly is superimposed on the dimensional chains of the cup body and the base. In simple terms, the dimensions between the upper and lower disk assemblies include: the distance from the upper disk to the bottom of the cup, the thickness of the bottom of the cup itself, and the distance from the bottom of the cup to the lower disk assembly. According to Coulomb's law, the interaction force between two magnets is inversely proportional to the square of the distance between them. Specifically, in a food processing machine, such as... Figure 6 As shown, even a change in distance exceeding 1mm between the upper and lower disk assemblies can have a significant impact, causing a rapid decrease in the magnetic attraction between the lower and upper disk assemblies. Therefore, further optimizing and reducing the distance between the upper and lower disk assemblies becomes a primary issue. Existing technologies typically rely on floating the upper disk, which not only reduces the distance between the upper and lower disk assemblies during operation but also allows for adjusting the gap when the agitator jams. However, existing technologies contain a misconception: the agitator's inability to complete pulverization and jamming is precisely due to insufficient interaction force between the upper and lower disk assemblies. In this case, reducing the distance between the upper and lower disk assemblies should be implemented to provide interaction force, ensuring the pulverizer has sufficient power to cut and pulverize. The purpose of floating the motor in existing technologies is only to prevent the vibration and impact of the pulverizer from being directly transmitted to the motor through the upper and lower couplings. Since direct transmission through the upper and lower couplings does not result in interaction force attenuation, the floating setting causes impact between the upper and lower couplings due to changes in their axial position. Direct contact magnetic attraction schemes would lose the effect of non-contact transmission in cutting off the transmission of mechanical vibrations.

[0066] In summary, existing floating mounting methods and direct magnetic adsorption connections are unsuitable for magnetic non-contact power transmission. Therefore, this application overcomes this technical bias by configuring the lower disk assembly to move between a first and second axial position, allowing it to closely adhere to the cup bottom and maintain the distance between the lower and upper disks. This application places the pulverizing device inside the cup bottom. Whether the pulverizing device is fixed to the cup bottom or detachably mounted there, it remains fully in contact with the bottom during use, minimizing the distance between the upper disk and the cup bottom. Furthermore, the upper disk's direct placement inside the cup bottom avoids the dimensional chain errors caused by the cup assembly. The thickness of the cup body, particularly the bottom, depends on the product's functional requirements. For example, if the bottom is metal and has a heating function, the bottom thickness is the same as the metal bottom thickness, which is easily controlled. Based on the controllable distance between the cup bottom and the upper disk, the next step is to control the dimension from the lower disk assembly to the outer side of the cup bottom. By directly setting the lower disk assembly to be close to the bottom of the cup, the displacement of the lower disk assembly when switching from the first position to the second position is used to absorb various tolerance dimensional chains and installation deviations of the food processing machine, so as to ensure that the distance between the lower disk assembly and the bottom of the cup can always be maintained within a preset dimensional range. Thus, based on the inner and outer settings of the bottom of the cup, the distance between the lower disk assembly and the upper disk is always at a controllable preset size, and is not limited by the influence of various tolerance dimensional chains of the food processing machine, so as to ensure stable and selectable power transmission between the lower disk assembly and the upper disk.

[0067] As a specific embodiment of the reliable transmission food processing machine described in this invention, such as Figure 1-6As shown, the food processing machine includes a base 100 and a cup body 110, with the cup body 110 placed on the base 100. The base 100 is equipped with a motor 2 and a lower disk assembly 3, the lower disk assembly 3 being disposed on the upper end of the motor shaft 21 of the motor 2. A positioning ring 120 is provided on the upper surface of the base 100, spatially surrounding the lower disk assembly 3. A positioning groove 121 and a recessed groove 113 are also provided at the bottom of the cup body 110. The base 100 is further equipped with a limiting device that axially limits the lower disk assembly 3, allowing for axial movement clearance. When the cup body 110 is mounted on the base 100, the positioning ring 120 is inserted into the positioning groove 121 to position the cup body 110, while the lower disk assembly 3 is inserted into the recessed groove 113, bringing it close to the bottom of the cup body 110. By utilizing the cooperation of the positioning ring and the positioning groove, as well as the cooperation of the lower disk assembly and the recess, the lower disk assembly can be properly positioned close to the cup body. Here, the lower disk assembly may be higher than the positioning ring in axial height; or, the lower disk assembly may be the same height as the positioning ring in axial height; furthermore, the lower disk assembly may be lower than the positioning ring in axial height, so that the positioning ring can provide appropriate protection for the lower disk assembly.

[0068] The cup body 110 is equipped with a pulverizing device 4 installed inside the bottom. The cup body 110 includes a main body and a bottom 111, which are sealed and fixedly connected to the main body, forming a completely sealed container structure. Compared with the prior art, the bottom of the cup does not have mechanical through holes, eliminating the risk of leakage. Furthermore, the sealed structure facilitates cleaning of the inside and outside of the cup. Preferably, in this embodiment, the pulverizing device 4 is detachably installed inside the bottom 111.

[0069] Preferably, the lower disk assembly 3 includes a lower disk body 31, which has a limiting hole 311. The upper end of the motor shaft 21 has a limiting post 211, which is inserted into the limiting hole 311. Further, the top end of the limiting post 211 has a locking screw 22 and a return spring 23. The locking screw 22 is fixed to the top end of the limiting post 211, and there is a gap between the locking screw 22 and the lower disk body 31. The return spring 23 is clamped between the locking screw 22 and the lower disk body 31. The limiting hole 311 and the locking screw 22 constitute the limiting device. Simultaneously, the gap between the locking screw 22 and the lower disk body 31 forms the movement gap of the lower disk assembly. Because the lower disk assembly has an axial clearance, it has a first position without the pulverizing device and a second position where it moves upward and is close to the outer side of the cup bottom after the pulverizing device is placed. The limiting device prevents the lower disk assembly from moving excessively upward and directly contacting the cup bottom, thus preventing friction between the lower disk assembly and the cup bottom. When the lower disk assembly 3 is in the first position, under the pushing action of gravity and the return spring 23, the bottom of the lower disk assembly 3 abuts against the upper step of the motor shaft 21. This arrangement aims to create a preset gap between the lower disk assembly in the first position and the cup bottom through the axial displacement of the lower disk assembly 3. After the cup body and the upper disk 41 are installed in place, the upper disk 41 attracts the lower disk assembly 3. The magnetic attraction between the upper disk 41 and the lower disk assembly 3 overcomes the gravity of the lower disk assembly 3 and the elastic force of the return spring 23, causing the lower disk assembly 3 to move upward to the second position close to the cup body 110. Using limiting holes and limiting posts, the lower disk assembly 3 can move axially along the motor shaft without rotating circumferentially, thus allowing it to switch from a first position to a second position. When the food processor is operating, the motor drives the lower disk assembly to rotate, further driving the upper disk to rotate. The axial displacement and circumferential rotation of the lower disk assembly are completed at different times: during the installation of the cup and crushing device, the lower disk assembly is pulled upwards to the second position close to the bottom of the cup; during this process, the motor does not rotate, and the lower disk assembly can smoothly switch from the first position to the second position. During the food processing, because the lower disk assembly is confined to the second position, it will not move axially during rotation, ensuring stable output between the motor and the lower disk assembly. A return spring is further provided; using the spring force of the return spring, when the crushing device is removed, the combined force of the lower disk assembly's weight and the return spring force allows the lower disk assembly to quickly return to the first position.In actual use, the axial displacement of the lower disk assembly can also be adjusted by adjusting the gap between the locking screw and the lower disk body, thereby controlling the distance between the lower disk assembly and the bottom of the cup.

[0070] The lower disk assembly 31 has a mounting cavity 313 at its top, and a lower magnet 32 ​​made of permanent magnet is provided in the mounting cavity 313. The lower disk assembly 3 also includes a lower cover plate 33 that closes the mounting cavity 313. The lower disk assembly 31 and the lower cover plate 33 enclose the lower magnet 32 ​​inside, preventing the lower magnet 32 ​​from being corroded by external liquids or the like.

[0071] Preferably, the pulverizing device 4 includes an upper disk 41 and a pulverizing element 45. The upper disk 41 is connected to the pulverizing element 45. When the upper disk 41 is driven by the lower disk assembly 3, it drives the pulverizing element 45 to rotate, thereby achieving cutting and pulverizing. The pulverizing device 4 also includes a fixed housing 43 and a cutter shaft 44. The fixed housing 43 has a fixed cavity 432. The upper disk 41 includes an upper magnet 42 made of permanent magnet material. The upper magnet 42 is disposed in the fixed cavity 432. The bottom of the fixed housing 43 also has a bottom 431 that closes the fixed cavity 432. The cutter shaft 44 passes through the fixed housing 43. The upper disk 41 and the pulverizing element 45 are respectively fixed at both ends of the cutter shaft 44. The fixed housing 43 also has a bearing 434 and a shaft seal 435. The cutter shaft 44 passes through the bearing 434 and the shaft seal 435, so that the upper disk 41, the cutter shaft 44, and the pulverizing element 45 can rotate relative to the fixed housing 43. Meanwhile, the shaft seal 435 prevents liquid inside the cup from flowing into the fixed cavity 432. A gap is provided between the upper disk 41 and the bottom shell 431. This design avoids contact and friction between the upper disk 41 and the bottom shell 431 during rotation, and also serves as a centering and positioning mechanism at the bottom. This prevents the upper disk from wobbling due to impacts from the crushing parts during operation, ensuring stable and reliable operation of the upper disk.

[0072] like Figure 4A , Figure 4B As shown, where, Figure 4A The diagram shows the lower disk assembly 3 in its first position when the shredder 4 is not installed. Figure 4B The diagram shows the crushing device 4 in its installed position, with the lower disk assembly 3 adsorbed and reaching the second position. At this time, the lower disk assembly 3 is limited by the limiting device, and although it is close to the bottom of the cup, it does not directly contact the bottom of the cup. Figure 4A As shown, in the first position, the lower disk assembly 3 is subject to the interaction of its own gravity, the gravity of the motor, the mounting structure of the base, and the pushing force of the return spring. At this time, the distance between the upper surface of the lower disk assembly 3 and the top surface of the motor is D2. Figure 4B As shown, when the lower disk assembly 3 is moved upward to the second position by the magnetic attraction of the crushing device 4, the distance between the upper surface of the lower disk assembly 3 and the top surface of the motor is D3, preferably D3 ≥ D2. The difference between D2 and D3 is the upward displacement of the lower disk assembly, which is also the error range of the food processing machine assembly dimensional tolerance chain that the lower disk assembly can absorb. The limiting state, D2 = D3, means that the lower disk assembly is just close to the bottom of the cup. When the cup body is installed in place, the lower disk assembly does not need to be displaced, and a controllable minimum distance can be maintained between the lower disk assembly and the upper disk to ensure stable and reliable power transmission between the lower disk assembly and the upper disk.

[0073] like Figure 6 The diagram shows the relationship between the distance between the upper and lower disk assemblies and the corresponding magnetic attraction force. Figure 6 It can be seen that when the distance between the upper and lower disk assemblies increases, the magnetic attraction between them decreases rapidly, especially when the total distance between the upper and lower disk assemblies is less than 8mm, the change in magnetic attraction between them is even more pronounced. It should be noted that... Figure 6 This reflects the direct contact distance between the upper and lower disk assemblies when no cup, shredder, or other structures are provided (i.e., Figure 6 The distance between the upper and lower disk assemblies in the central horizontal axis is calculated as: distance from the upper disk to the cup body + thickness of the cup body + gap L between the cup body and the lower disk assembly. In a food processing machine, the lower disk assembly needs to be mounted on the motor and requires a fixed and enclosed structure to seal its permanent magnets. The pulverizing device needs to be placed inside the cup body for pulverizing. Similarly, the upper disk and its permanent magnets also require fixed and enclosed structures to prevent the permanent magnets from being directly exposed to the food inside the cup. Furthermore, the cup bottom itself has a thickness between the upper and lower disk assemblies. Therefore, the actual application distance between the upper and lower disk assemblies cannot start from 0. As mentioned earlier, since the pulverizing device is placed directly inside the cup body, the distance between the upper disk and the cup bottom is fixed, and the thickness of the cup bottom is fixed. Therefore, the main factor affecting the distance between the upper disk assembly and the lower disk is the gap L between the cup bottom and the upper disk assembly.

[0074] For the reasons mentioned above, preferably, the gap L is set to ≤ 2mm. Of course, due to the gap, the lower disk assembly and the cup bottom will not be directly attached, meaning the gap L must be greater than 0. Naturally, the closer the gap between the lower disk assembly and the cup bottom is to 0, the greater the magnetic interaction force between the lower disk assembly and the upper disk. As mentioned earlier, the smaller the distance between the lower disk assembly and the cup bottom, the better; for example, the gap L can be set to 0.1mm, 0.2mm, 0.4mm, 0.5mm, etc. However, due to uncontrollable tolerance factors during product manufacturing, such as the flatness of the upper surface of the lower disk assembly and the cup bottom itself, the distance between them cannot be infinitely close to 0. Therefore, while ensuring proper fit between the lower disk assembly and the cup body, the gap L between the lower disk assembly and the cup body is set to ≤ 2mm. If the gap between the lower disk assembly and the cup body is too large, it will greatly affect the magnetic attraction between the lower disk assembly and the upper disk, failing to fully guarantee the crushing torque requirements of the crushing device.

[0075] It should be noted that, for food processing machines, although there will be tolerances and assembly errors in each component, the food processing machine itself is relatively small. Therefore, when the feedback reaches the lower disk assembly, the tolerance displacement of the lower disk assembly will usually not exceed 2mm. Thus, the displacement between the first and second positions of the lower disk assembly is usually not greater than 2mm. Of course, there will also be extreme assembly positions for the lower disk assembly. When the cup body is installed in place, the lower disk assembly is already close to the outer side of the cup bottom, so that there is no obvious change in the lower disk assembly from the first position to the second position, that is, the distances D2 and D3 are the same.

[0076] Preferably, the outer side of the cup bottom 111 is provided with a recessed platform 112 that is recessed into the interior of the cup body 110. When the cup bottom 111 is made of metal, the recessed platform 112 correspondingly forms a protrusion protruding into the interior of the cup body on the inner side of the cup bottom 111. The crushing device 4 is placed on the protrusion, and correspondingly, when the lower disk assembly 3 is in the second position, the lower disk assembly 3 extends into the recessed platform 112. The recessed platform simultaneously limits the upper and lower disk assemblies, ensuring accurate and reliable alignment of the upper and lower disk assemblies, thereby making the power transmission of the upper and lower disk assemblies stable and reliable. At the same time, the local setting of the protrusion on the cup bottom makes it easier to improve the strength of the cup bottom at the protrusion, thereby making the flatness of the cup bottom at the protrusion better and preventing deformation that would affect the gap between the upper and lower disk assemblies.

[0077] The food processing machine using the technical solution of this application employs non-contact magnetic transmission, completely eliminating mechanical transmission between the crushing device and the motor. This avoids the transmission of vibration and impact from the crushed parts during operation to the motor, resulting in a more balanced and quieter operation, meeting users' demands for low noise. The lower disk assembly is positioned directly close to the bottom of the cup. Based on the stable and selectable distance between the crushing device and the cup bottom, this further avoids the influence of the food processing machine's size on the distance between the lower disk assembly and the cup bottom, thus ensuring that the distance between the lower disk assembly and the upper disk is at a preset optimal size. This ensures stable and reliable power transmission between the lower and upper disk assemblies. The lower disk assembly is configured with a first position and a second position. The displacement difference between the first and second positions absorbs dimensional errors caused by various factors, such as the assembly tolerance chain of the food processing machine's base and cup body, operational errors during cup installation by the user, and wear errors during long-term use. This ensures that the upper and lower disk assemblies always maintain a preset minimum distance, guaranteeing that the interaction force between the upper and lower disk assemblies is within a preset range, thus ensuring stable and reliable cutting and crushing of the crushed parts. Furthermore, the lower disk assembly is always maintained in the second position by the suction effect of the cup body and the crushing device, rather than "floating" in the axial direction as in the prior art. That is, the distance between the upper and lower disk assemblies does not change during operation, thereby ensuring stable and reliable power transmission of the food processing machine.

[0078] It is understandable that the motor shaft may not be provided with a limiting post, and the lower disk body may not be provided with a limiting hole, but only with a through hole. The top of the motor shaft is directly locked with a locking screw, and the distance between the locking screw and the lower disk body is used to control the switching of the lower disk assembly between the first position and the second position.

[0079] Understandably, the lower disk assembly, particularly the disk body, is directly composed of the permanent magnet. For example, the permanent magnet is ring-shaped, the limiting structure is installed at the rotation center of the permanent magnet, and the bottom of the permanent magnet is fixedly connected to the motor shaft; or, the permanent magnet is fixedly connected to the motor shaft through the bearing.

[0080] It is understood that the lower disk assembly, especially the disk body, is composed of multiple permanent magnets connected and fixed together or glued together, and the limiting structure is installed at the rotation center of the permanent magnets.

[0081] Understandably, the lower disk assembly is composed of a disk body and an electromagnet disposed on the disk body, etc., and the upper disk body disposed in the cup body is provided with a permanent magnet. The lower disk assembly is attracted to the upper disk body by electromagnetic force and transmits power.

[0082] Understandably, the base is equipped with a magnet that is magnetically repelled by the lower disk assembly. When the cup is picked up, the lower disk assembly returns from the second position to the first position under the action of the magnet.

[0083] Understandably, the lower disk assembly may not have a return spring. A sealed space is provided between the lower disk assembly and the motor shaft, and gas is filled in the sealed space to push the lower disk assembly to the first position. After the cup body leaves the lower disk assembly, the lower disk assembly returns to its original position under the pushing action of the compressed gas.

[0084] Understandably, the pulverizing device is fixed to the inner side of the cup bottom. For example, the inner side of the cup bottom is provided with a fixed shaft or a fixed hole, and the pulverizing device is fixed to the fixed shaft or fixed hole. The pulverizing element and the upper disk are rotatably arranged, and the lower disk assembly drives the upper disk and causes the pulverizing element to rotate.

[0085] As another preferred embodiment of this application, such as Figures 7-9B As shown, a limiting structure 5 is also provided at the upper end of the lower disk assembly 3. The limiting structure 5 is installed at the rotation center of the lower disk assembly 3. When the cup body 110 is installed on the base 100, after the lower disk assembly 3 switches from the first position to the second position, the limiting structure 5 clamps between the lower disk assembly 3 and the cup bottom 111 of the cup body 110, forming a gap between the lower disk assembly 3 and the cup bottom 111. The limiting structure is used to prevent the lower disk assembly in the second position from directly contacting the cup bottom, making the gap between the lower disk assembly and the cup bottom more stable and reliable. This avoids the lower disk assembly from rubbing against the cup bottom during operation, which would affect the normal operation of the lower disk assembly. The magnetic force between the lower disk assembly and the upper disk is also more stable and reliable.

[0086] Specifically, the rotation center of the lower disk assembly 3 is provided with a mounting hole 312, and the limiting structure 5 includes a bearing 51 installed at the mounting hole 312. Preferably, the bearing 51 includes a first rotating part and a second rotating part, wherein the bearing 51 is fixed in the mounting hole 312 by the first rotating part, and when the lower disk assembly 3 is in the second position, the second rotating part contacts the bottom of the cup.

[0087] Preferably, the bearing is a ball bearing, deep groove ball bearing, or thrust bearing, and typically includes inner and outer rings or upper and lower parts that rotate relative to each other. In this embodiment, the first rotating part is the outer ring 511 of the bearing 51, which is inserted into the mounting hole 312 and fixedly connected to the lower disk assembly 3. The second rotating part is the inner ring 513 of the bearing 51, and a ball bearing 512 is provided between the outer ring 511 and the inner ring 513. When the lower disk assembly 3 rotates, the outer ring 511 rotates together with the lower disk assembly 3, while the inner ring 513 contacts the cup bottom 111 and remains stationary. The ball bearing 512 is held between the outer ring 511 and the inner ring 512 and rotates relative to each other, thereby realizing the relative rotation operation between the lower disk assembly 3 and the cup bottom 111. Preferably, the second rotating part further includes an abutment 52 disposed on the inner ring 513. The abutment 52 protrudes from the upper end surface of the lower disk assembly 3. When the lower disk assembly 3 is in the second position, the abutment 52 contacts the cup bottom 111. Preferably, the cup bottom 111 is made of stainless steel and is provided with a heating element; the bearing 51 is a metal part, and the abutment 52 is a plastic part, so as to withstand the impact between the lower disk assembly and the cup bottom when the lower disk assembly switches from the first position to the second position.

[0088] The mounting cavity 313 and the mounting hole 312 at least partially overlap in the lateral height of the lower disk assembly 3, thereby allowing the lower magnet 32 ​​disposed within the mounting cavity 313 to surround the outer periphery of the bearing 51 mounted within the mounting hole 312. In the axial direction, when the lower disk assembly 3 is in the second position, the lower magnet 32 ​​can be close to the cup bottom 111, and the distance between the lower disk 32 and the cup bottom 111 is controlled by the protrusion height of the bearing 51. By surrounding the lower magnet 32 ​​around the outer periphery of the bearing 51, the mounting cavity 313 has a larger radius and circumference, allowing for the installation of more lower magnets. At the same height, the lower magnet 32 ​​also has a stronger magnetic flux, thereby enhancing the magnetism of the lower disk assembly 3.

[0089] The upper end of the abutment 52 protrudes from the upper surface of the lower disk assembly 3, with a height difference D1 between them. When the lower disk assembly 3 is in the second position, the abutment 52 abuts against the outer side of the cup bottom 111 of the cup body 110. When the lower disk assembly 3 is working, the abutment 52 closely engages with the cup bottom 111, creating a gap L between the cup bottom 111 and the top of the lower disk assembly. Due to the pushing action of the abutment, the gap L can be set sufficiently small. As mentioned above, preferably, L ≤ 2mm, meaning that the upper surface of the lower disk assembly is close to but does not contact the outer side of the cup bottom, ensuring that the distance between the lower disk assembly and the upper disk is sufficiently close while also avoiding friction between the lower disk assembly and the cup bottom. The cooperation between the bearing and the abutment ensures that the lower disk assembly will not vibrate or produce noise during high-speed rotation. Furthermore, the bearing and the abutment are located at the rotation center of the lower disk assembly. The outer diameter of the abutment does not need to be too large, serving both a pushing function and reducing the rotational linear velocity of the abutment, thus making the transmission of the food processing machine more stable and reliable. Preferably, the height difference D1 of the abutment 52 protruding from the upper end face of the lower disk assembly 3 is equal to the gap L between the cup bottom 111 and the upper end face of the lower disk assembly 3. Of course, the height difference D1 can also be greater than the gap L. This is because the protruding part of the abutment 52 forms a gap between the lower disk assembly and the cup bottom. When the lower disk assembly is abutted against the cup bottom by the magnetic attraction of the upper disk, the abutment 52 may be squeezed and deformed appropriately, thereby making the height difference D1 greater than the gap L. When the abutment 52 is made of a metal part or a hard plastic part that is not easily squeezed and deformed, the height difference D1 is equal to the gap L. Therefore, the gap L between the lower disk assembly and the cup bottom can be controlled by controlling the height difference D1 of the abutment protruding from the lower disk assembly. Since the limiting component is directly mounted on the upper surface of the lower disk assembly, the installation structure between the limiting component and the lower disk assembly is simple, ensuring that D1 is within a controllable tolerance range. Furthermore, after the limiting component is installed, it can be further processed to ensure a higher precision in the height difference D1 between the upper surfaces of the limiting component and the lower disk assembly, thereby ensuring that the gap L is smaller within a controllable range.

[0090] The limiting structure 5 is installed at the rotation center of the lower disk assembly 3, and the limiting structure 5 protrudes from the upper end face of the lower disk assembly 3. Alternatively, the limiting structure 5 can also be installed at the bottom of the cup, corresponding to the rotation center of the lower disk assembly 3; or, the limiting structure 5 comprises two parts, simultaneously disposed at the bottom of the cup and the lower disk assembly, and the combined part is located at the rotation center of the lower disk assembly 3. When the cup body 110 is installed on the base 100, and the lower disk assembly 3 is close to the bottom of the cup, the limiting structure 5 simultaneously abuts against both the lower disk assembly 3 and the bottom of the cup body 110, preventing direct contact between the lower disk assembly 3 and the bottom of the cup. For example, the limiting structure 5 is disposed on the lower disk assembly 3; when the cup body 110 is installed, the cup body 110 abuts against the limiting structure 5, so that the limiting structure 5 is clamped between the lower disk assembly 3 and the cup body 110. The height of the limiting structure 5 protruding from the upper surface of the lower disk assembly 3 is used to limit the gap between the lower disk assembly 3 and the cup bottom, so that the lower disk assembly and the cup bottom can be kept close but not in contact.

[0091] like Figure 9A , Figure 9B As shown, where, Figure 9A The image shows the lower disk assembly 3 in its first position when the shredding device 4 is not installed; Figure 9B The diagram shows the state where, when the pulverizing device 4 is installed, the lower disk assembly 3 is adsorbed and reaches the second position, and the limiting structure 5 is clamped between the lower disk assembly 3 and the cup bottom 111. Figure 9A As shown, in the first position, the lower disk assembly 3 is in a natural state without any other external forces. At this time, the distance between the upper surface of the lower disk assembly 3 and the top surface of the motor is D2. Figure 9B As shown, the cup body and crushing device are installed in place. The lower disk assembly 3 is magnetically attracted by the crushing device 4 and moves upward to the second position. The distance between the upper surface of the lower disk assembly 3 and the top surface of the motor is D3, preferably D3 ≥ D2. When the lower disk assembly 3 is in the second position, the limiting structure 5 abuts against the bottom of the cup, creating a gap between the lower disk assembly and the bottom of the cup. The difference between D2 and D3 is the upward displacement of the lower disk assembly, which is also the range of error in the dimensional tolerance chain of the food processing machine assembly that the lower disk assembly can absorb. The limiting structure enables a stable and reliable fit gap between the lower disk assembly and the bottom of the cup, allowing the lower disk assembly to rotate at high speed and drive the upper disk without contacting or rubbing against the bottom of the cup.

[0092] A limiting structure is provided between the lower disk assembly and the cup bottom. This limiting structure creates a gap between the lower disk assembly and the cup bottom, preventing direct contact and friction. Simultaneously, the limiting structure ensures a stable and reliable distance between the lower disk assembly and the cup bottom, and ultimately between the lower disk assembly and the upper disk, thus guaranteeing stable power transmission between them. Furthermore, the limiting structure, clamped between the lower disk assembly and the cup bottom, prevents the upper disk from transmitting vibrations and noise generated during operation to the lower disk assembly through the cup bottom. Therefore, this solution, while achieving non-contact transmission, utilizes the lower disk assembly configuration to address various dimensional deviations in food processing machines, such as component tolerances, product assembly tolerance chains, product assembly deviations, user usage deviations, and product wear deviations. The limiting structure also prevents direct contact and friction between the lower disk assembly and the cup bottom. A limiting structure is used to clamp the lower disk assembly and the cup bottom, ensuring a sufficiently close distance between them without direct contact. This guarantees the magnetic interaction between the lower and upper disk assemblies while preventing direct friction. The limiting structure, located at the center of rotation of the lower disk assembly, has a relatively small linear velocity due to its relatively small radius during high-speed rotation. Even if the limiting structure rotates relative to the lower disk assembly or the cup bottom, it can withstand relative friction within a preset range, thus achieving a structural fit between the lower disk assembly and the cup bottom that is both close and friction-free.

[0093] A limiting structure is used to limit the lower disk assembly when it reaches the second position, preventing direct contact between the lower disk assembly and the cup bottom. The limiting structure is directly disposed between the lower disk assembly and the cup bottom. Preferably, the thickness of the limiting structure itself can be used to limit the gap between the lower disk assembly and the cup bottom, thereby ensuring the distance between the lower disk assembly and the upper disk. Since the limiting structure does not have excessive installation dimensions, further processing can be performed after installation, making it easier to control the gap between the lower disk assembly and the cup bottom. This allows for more reliable compression of the distance between the lower disk assembly and the upper disk, ensuring stable and reliable transmission between them.

[0094] Both the limiting device and the limiting structure function to limit the axial displacement of the lower disk assembly. The limiting device directly acts on the axial displacement of the lower disk assembly, ensuring axial stability while controlling the upper limit of axial displacement through a movement gap to prevent direct contact between the lower disk assembly and the cup bottom. The limiting structure directly clamps between the lower disk assembly and the cup bottom, and can withstand relative movement between them. Therefore, the second position defined by the limiting structure is within the axial displacement space of the lower disk assembly. In other words, even when the limiting structure contacts and clamps the lower disk assembly between it and the cup bottom, the lower disk assembly still has upward movement space to meet the installation requirements of different cups. Of course, the limiting device and the limiting structure can also be used in combination. When the lower disk assembly moves upward under the adsorption of the upper disk until it is clamped between the cup body and the lower disk assembly by the limiting structure, the limiting structure plays a limiting role, while the limiting device does not play a role. However, when the lower disk assembly continues to move until the limiting device plays a role, but the limiting structure has not yet reached the space between the lower disk assembly and the bottom of the cup, the limiting device plays a role and limits the lower disk assembly to continue moving upward.

[0095] Understandably, the limiting structure is disposed on the lower disk assembly. The limiting structure includes a housing disposed outside the lower disk assembly. The lower disk assembly can rotate within the housing. The housing abuts against the bottom of the cup. The rotation of the lower disk assembly drives the upper disk to work.

[0096] Understandably, the limiting structure only includes a lower bearing disposed in the mounting hole of the lower disk assembly. The lower bearing includes an inner ring protruding from the upper end face of the lower disk assembly. The outer ring of the lower bearing is fixedly connected to the lower disk body. The inner ring fits against the outer side of the cup bottom, so that there is a gap between the lower disk assembly and the cup bottom.

[0097] Understandably, the limiting structure includes a protrusion located at the rotation center of the upper end face of the lower disk assembly. This protrusion extends upwards, i.e., towards the bottom of the cup. When the lower disk assembly is in the second position, the protrusion abuts against the outer side of the bottom of the cup, creating a gap between the upper end face of the lower disk assembly and the bottom of the cup. When the lower disk assembly is in operation, the protrusion and the lower disk assembly rotate together relative to the bottom of the cup. Since the protrusion is located at the rotation center of the lower disk assembly, it typically does not need to be set to an excessively large size. Therefore, the rotational linear velocity of the protrusion is relatively small, and it will not generate excessive friction, thereby ensuring power transmission while maintaining the gap in the lower disk assembly.

[0098] Understandably, the limiting structure includes a downward protrusion located at the bottom of the cup corresponding to the rotation center of the lower disk assembly. When the lower disk assembly is in the second position, the protrusion abuts against the top surface of the lower disk assembly, and the lower disk assembly rotates relative to the protrusion and drives the upper disk.

[0099] Understandably, the limiting structure includes a bearing located at the bottom of the cup corresponding to the rotation center of the lower disk assembly. The fixed portion of the bearing is connected to the bottom of the cup, and the rotating portion of the bearing protrudes downward and abuts against the lower disk assembly in the second position. The lower disk assembly rotates and drives the upper disk to operate.

[0100] Understandably, the limiting structure is fixedly connected to the motor shaft, the motor is mounted on the housing and has axial movement space, and the motor and the lower disk assembly move together axially to allow the lower disk assembly to switch between a first position and a second position.

[0101] As another preferred embodiment of this application, such as Figure 10 As shown, in this embodiment, the lower disk assembly is fixedly connected to the motor, the motor is movably mounted on the base, and the limiting device is disposed on the base. The base limits the axial movement clearance of the motor, thereby allowing the lower disk assembly fixedly connected to the motor to have an axial movement clearance. When the pulverizing device is installed in place, the upper disk adsorbs the lower disk assembly and drives the lower disk assembly and the motor together to the second position, thereby driving the upper disk.

[0102] Specifically, such as Figure 10As shown, the base 100 includes an upper housing 101 and a lower housing 102. The motor 2 includes a motor mounting bracket 24. The limiting device includes a fixing post and a positioning hole located on the upper housing 101 and the lower housing 102. The base 100 uses the interlocking fixing post and positioning hole to clamp the motor mounting bracket 24 to install and fix the motor 2 inside the base 100. Preferably, the upper housing 101 and the lower housing 102 are fixed by motor screws, and the motor 2 has axial movement space. When the pulverizing device is not placed, the motor and the lower disk assembly are limited downward by the lower housing under the action of gravity, supported by the lower housing, so that the lower disk assembly is in a first position. When the pulverizing device is placed, the upper disk attracts the lower disk assembly. The magnetic attraction between the upper disk and the lower disk assembly overcomes the gravity of the lower disk assembly and the motor, causing the lower disk assembly and the motor to move upward together to a second position. At this time, the motor presses upward against the upper housing and is limited by the upper housing. During the operation of the food processing machine, the lower disk assembly and the motor are held in the second position to maintain the optimal transmission distance between the lower disk assembly and the upper disk.

[0103] Understandably, the motor can be directly mounted on the upper housing using screws or the like, and there is a space between the motor and the upper housing for movement, so that the motor and the lower disk assembly can be switched together from the first position to the second position.

[0104] Understandably, the motor can be supported by the lower housing and has a space between it and the lower housing to allow the motor and the lower disk assembly to switch together from a first position to a second position.

[0105] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes and modifications made in accordance with the present invention are covered by the scope of the claims of the present invention, and will not be listed here.

Claims

1. A food processor having a reliable drive, characterised in that, The food processor comprises, a base provided with a motor and a lower magnetic disk assembly driven by the motor; a cup body detachably mounted on the base, the cup body being provided with a crushing device mounted on the inner side of the cup bottom; the crushing device comprising a crushing element, an upper magnetic disk attracted to the lower magnetic disk assembly and driving the crushing element to work under the drive of the lower magnetic disk assembly; the lower magnetic disk assembly having a first position without placing the crushing device, and a second position after placing the crushing device, moving from the first position to the outer side of the cup bottom and being close to the outer side of the cup bottom with a gap.

2. The food processor of claim 1, wherein the drive is reliable. The food processor further comprises a limiting structure, the limiting structure comprising a bearing provided on the lower magnetic disk assembly, the bearing comprising a first rotating part and a second rotating part relatively rotating, the first rotating part being fixedly connected with the lower magnetic disk assembly, and the second rotating part protruding from the upper end surface of the lower magnetic disk assembly, the second rotating part in the second position being in contact with the cup bottom.

3. The food processor of claim 2, wherein the drive is reliable. The rotation center of the lower magnetic disk assembly is provided with a mounting hole accommodating the bearing, and the permanent magnet of the lower magnetic disk assembly surrounds the outer periphery of the mounting hole.

4. The food processor of claim 2, wherein the transmission is reliable. The second rotating part comprises an abutting piece protruding from the upper end surface of the lower magnetic disk assembly.

5. The reliable food processor of claim 1, wherein, The base is further provided with a limiting device, which limits the lower magnetic disk assembly in the axial direction so that the lower magnetic disk assembly has a movement gap in the axial direction.

6. The food processor of claim 5, wherein the drive is reliable. The lower magnetic disk assembly is provided with a limiting hole and a fixing element sleeved on the motor shaft, and the limiting device comprises a limiting hole and a fixing element provided on the lower magnetic disk assembly and sleeved on the motor shaft, and the lower magnetic disk assembly can move in the axial direction of the motor shaft and the limiting hole to form the movement gap.

7. The food processor of claim 5, wherein the transmission is reliable. The lower magnetic disk assembly is fixedly connected with the motor, and the limiting device is arranged on the base so that the lower magnetic disk assembly and the motor can move in the axial direction relative to the base to form the movement gap.

8. The food processor of claim 5, wherein the transmission is reliable. The base is further provided with an elastic element for pushing the lower magnetic disk assembly to move in the axial direction of the movement gap and resetting.

9. The reliable food processor of claim 1, wherein, The top end of the base is provided with a fixing table for mounting the cup body, the fixing table surrounds the periphery of the lower magnetic disk assembly, the bottom of the cup body is provided with an accommodating cavity accommodating the lower magnetic disk assembly, and the lower magnetic disk assembly extends into the accommodating cavity and switches from the first position to the second position.

10. The reliable food processor of claim 1, wherein, The outer side of the cup bottom is provided with a sunken table recessed towards the inside of the cup body, and the lower magnetic disk assembly in the second position extends into the sunken table.

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