Food processor with reliable transmission

Abstract

The application discloses a food processor with reliable transmission, which comprises a base provided with a motor and a lower magnetic disk assembly driven by the motor; a cup body detachably installed on the base, the cup body being provided with a crushing device installed on the inner side of the cup bottom; the crushing device comprising a crushing piece, an upper magnetic disk attracted to the lower magnetic disk assembly and driving the crushing piece to work under the drive of the lower magnetic disk assembly; a limiting structure arranged between the lower magnetic disk assembly and the cup bottom, the limiting structure being located at the rotation center of the lower magnetic disk assembly and being in contact with the lower magnetic disk assembly and the cup bottom respectively, and the limiting structure making the lower magnetic disk assembly and the cup bottom have a gap. The limiting structure makes the lower magnetic disk assembly and the cup body have a gap without direct contact, which guarantees stable transmission and avoids mutual friction, and finally makes the distance between the lower magnetic disk assembly and the cup body always be in a stable and reliable working state.

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 blade, 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 blade. The driven coupling has a certain floating space in the axial direction, allowing the grinding blade to slide appropriately in the axial direction to disengage from jammed materials and ensure normal operation. This scheme allows the cup body to be designed as a completely sealed structure with no mechanical connection holes at the bottom, thus better solving the leakage problem of the mixing 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 offer solutions in two opposing directions: one involves a floating configuration that increases the distance between the upper and lower couplings; the other involves complete magnetic bonding between the magnetic drive and transmission components. However, a non-contact magnetic transmission solution requires a middle ground: a sufficiently small distance between the upper and lower couplings without contact, while maintaining a stable distance to prevent torque fluctuations between the lower and upper coupling components due to distance variations. This is precisely the kind of solution lacking in existing technologies. 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 lower disk assembly and the upper disk are detachable from the base, resulting in unstable power transmission due to poor distance stability, and where the magnetic drive structure that is directly attracted has mutual friction, causing vibration and noise to be directly transmitted.

[0007] To solve the above-mentioned 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, the cup body having a pulverizing device installed inside the cup bottom; the pulverizing device including a pulverizing element and an upper disk that attracts the lower disk assembly and drives the pulverizing element under the drive of the lower disk assembly; and a limiting structure disposed between the lower disk assembly and the cup bottom, the limiting structure being located at the rotation center of the lower disk assembly and contacting both the lower disk assembly and the cup bottom, and the limiting structure creating a gap between the lower disk assembly and the cup bottom.

[0008] Preferably, the limiting structure includes a bearing, which includes a first rotating part and a second rotating part that rotate relative to each other. The first rotating part and the second rotating part respectively contact the lower disk assembly and the cup bottom, so that the lower disk assembly and the cup bottom rotate relative to each other through the bearing.

[0009] Preferably, the rotation center of the lower disk assembly is provided with a mounting hole for accommodating the bearing, the first rotating part is fixedly connected to the lower disk assembly, the second rotating part protrudes from the upper end face of the lower disk assembly, and the second rotating part in the second position contacts the bottom of the cup.

[0010] Preferably, the permanent magnet of the lower disk assembly surrounds the outer periphery of the bearing.

[0011] Preferably, the second rotating part includes an abutment member that protrudes from the upper surface of the lower disk assembly.

[0012] Preferably, the limiting structure includes a protrusion extending downward from the bottom of the cup, the protrusion contacting the lower disk assembly and rotating relative to the lower disk assembly; or, the limiting structure includes a protrusion extending upward from the upper disk, the protrusion contacting the bottom of the cup and rotating relative to the bottom of the cup.

[0013] Preferably, the lower disk assembly has a first position and a second position where it is pushed axially by the cup body after being placed and moves close to the outer side of the cup bottom, and the limiting structure creates a gap between the lower disk assembly and the cup bottom.

[0014] Preferably, the lower disk assembly is provided with a limiting hole fitted onto the motor shaft of the motor, and the lower disk assembly can move axially along the motor shaft and the limiting hole to switch between a first position and a second position.

[0015] Preferably, the lower disk assembly is fixedly connected to the motor, the motor is movably mounted on the base, and the motor and the lower disk assembly move axially to switch between a first position and a second position.

[0016] Preferably, the base also includes an elastic element that allows the second lower disk assembly to return from the second position to the first position.

[0017] Compared with the prior art, this application has at least the following technical effects:

[0018] 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 preventing the crushing components from transmitting vibration and noise during operation to the motor. The crushing device is positioned at the bottom of the cup, ensuring it is fully in contact with the cup bottom, thus minimizing the controllable distance between the upper disk and the cup bottom. The lower disk assembly is then positioned close to the cup bottom with a gap, maintaining this gap while avoiding direct contact. Therefore, 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. Therefore, by setting the crushing device at the bottom of the cup, the distance between the upper disk and the bottom of the cup is kept at a controllable minimum; the limiting structure is used to ensure that the distance between the lower disk assembly and the bottom of the cup is kept at a stable and reliable controllable minimum. Thus, the distance between the lower disk assembly and the upper disk is always kept at a stable, reliable, and controllable minimum value, which enables reliable power transmission between the lower disk assembly and the upper disk without contact.

[0019] The main purpose of the limiting structure is to provide a safe clearance between the lower disk assembly and the cup bottom, ensuring rotation between them. This guarantees that the lower disk assembly can reliably rotate close to the cup bottom and drive the upper disk. Although the distance between the lower disk assembly and the upper disk is smaller when the lower disk assembly is in direct contact with the cup bottom, the lower disk assembly will rotate relative to the cup bottom and rub against it during operation. By clamping the limiting structure between the lower disk assembly and the cup bottom, the limiting structure can effectively control the distance between them while avoiding the relative friction caused by large-area contact, allowing the lower disk assembly to rotate stably and reliably relative to the cup bottom.

[0020] Furthermore, the limiting structure is directly mounted on the lower disk assembly or the bottom of the cup. Regardless of whether the limiting structure is mounted on the lower disk assembly or the bottom of the cup, the direct assembly between the two components ensures good assembly tolerances between the limiting structure and the lower disk assembly or the bottom of the cup. In fact, further processing can be performed after the limiting structure and the lower disk assembly or the bottom of the cup are assembled to achieve even higher assembly precision. With this configuration, when the cup body and the crushing device are mounted on the base, regardless of how the cup body is installed, the cup body or the upper disk can push 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, there is still a gap between them. The ultimate goal is to achieve a controllable minimum distance between the upper disk and the lower disk assembly, thereby maximizing the magnetic interaction force between the lower disk assembly and the upper disk. This allows the motor torque to be transferred to the upper disk to the maximum extent, ensuring that the upper disk and the crushing component have sufficient torque to achieve crushing and cutting. This solves the problem of vibration and noise transmission when there is direct mechanical contact between the motor and the crushing parts, and also ensures the power transmission between the motor and the crushing parts, thus providing users with a food processing machine with low noise and stable and reliable power transmission.

[0021] 2. 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 between the lower disk assembly and the cup bottom while keeping the distance between them controllable to a minimum. Further, the bearing includes a first rotating part and a second rotating part, one of which is mounted on the outside of the lower disk assembly or the cup bottom, and the other is in contact with the opposite cup bottom or lower disk assembly. For example, the bearing is mounted on the lower disk assembly via the first rotating part. When the lower disk assembly reaches the second position, the second rotating part contacts the cup bottom, creating a gap between the upper surface of the lower disk assembly and the cup bottom. When the lower disk assembly rotates, the first rotating part rotates together with the lower disk assembly, while the second rotating part remains relatively stationary with the cup bottom. Thus, through the relative rotation of the first and second rotating parts, relative rotation between the lower disk assembly and the cup bottom is achieved without direct contact. The bearing itself can withstand high-speed, long-term relative rotation to meet the high-speed requirements of the lower disk assembly and ensure the food processing machine remains stable and reliable during long-term operation.

[0022] 3. A mounting hole is provided at the rotation center of the lower disk assembly, and the bearing is placed in the mounting hole. The second rotating part of the bearing 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 bottom of the cup. Thus, when the lower disk assembly is in the second position, the second rotating part of the bearing directly abuts against the bottom of the cup, resulting in a gap between the upper end face of the lower disk assembly and the bottom of the cup. When the lower disk assembly rotates, there will be no direct friction between the lower disk assembly and the bottom of the cup. The bearing is directly mounted on the lower disk assembly, and there is only one level of mounting structure between them. This facilitates the control of the mating dimensions between the lower disk assembly and the bearing, and can reliably control the protrusion of the bearing from the upper end face of the lower disk assembly, ultimately controlling the gap between the lower disk assembly and the bottom of the cup, so that the distance between the lower disk assembly and the upper disk is in a stable, reliable, and small state.

[0023] 4. 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 permanent magnet of the lower disk assembly and the permanent magnet of the upper disk is small enough and stable and reliable under the control of the bearing. The bearing at the center of rotation 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 speeds. 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 magnetic poles of the permanent magnets of the upper and lower disk assemblies are arranged opposite each other to ensure the strongest magnetic force between them. In this case, the permanent magnet surrounding the outer periphery of the bearing avoids the excessive magnetic attraction exerted on the bearing when the magnetic poles of the permanent magnet are directly opposite each other, which would affect the stable and reliable operation of the bearing itself.

[0024] 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, which contacts the bottom of the cup. This allows the distance between the lower disk assembly and the bottom of the cup to be controlled. In particular, after assembling the bearing 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 accurately controlling the distance between the lower disk assembly and the bottom of the cup. During the service life of the food processing machine, the bearing bears the relative rotation between the lower disk assembly and the bottom of the cup for a long time. When the lower disk assembly is not working, the abutment also bears the magnetic attraction between the lower disk assembly and the upper disk. The abutment can be used to withstand product wear, and further, by directly replacing the abutment, low-cost product lifecycle maintenance can be achieved.

[0025] 6. The purpose of the limiting structure is to withstand the relative friction between the lower disk assembly and the cup bottom while ensuring the distance between them. Therefore, the limiting structure can be directly provided on the lower disk assembly or the cup bottom, for example, by providing a protrusion protruding towards the lower disk assembly at the bottom of the cup bottom, or by providing a protrusion protruding towards the cup bottom on the lower disk assembly. The protrusion on the lower disk assembly or the cup bottom abuts against the cup bottom or the lower disk assembly, creating a gap between the main power-driven rotating part of the lower disk assembly and the cup bottom, thereby preventing direct friction between the main body of the lower disk assembly and the cup bottom. It should be noted that since the protrusion is directly formed by the lower disk assembly or the bottom of the cup, the protrusion will rub against each other during contact. For example, the protrusion on the lower disk assembly will rub against the bottom of the cup when the lower disk assembly rotates. Therefore, on the one hand, the protrusion is located at the rotation center of the lower disk assembly, and on the other hand, the radius of the protrusion should be reduced to reduce the rotational linear velocity of the protrusion and reduce the frictional force on the protrusion.

[0026] 7. The lower disk assembly is further configured to have a first position and a second position for axial movement. The first position refers to the natural state of the lower disk assembly when it is installed on the base and neither the cup nor the upper disk is placed there, and no other external force is applied to it. The second position may have different movement methods depending on the assembly conditions: after the cup is installed on the base, the lower disk assembly is pulled from the first position to a second position close to the bottom of the cup by the suction effect of the cup and the upper disk placed inside the cup; or, after the cup is installed on the base, the lower disk assembly moves downward under the pressure of the cup to a second position close to the bottom of the cup. In other words, the lower disk assembly is configured to have axial displacement. When the cup and the crushing device are placed, the lower disk assembly can be axially displaced to switch from the first position to the second position, and in the second position, it is in close contact with the bottom of the cup. Furthermore, under the limiting effect of the limiting structure, while in close contact, there is also a gap between the lower disk assembly and the bottom of the cup. Because the lower disk assembly can switch between a first position and a second position, the displacement between the first and second positions can absorb dimensional differences caused by various factors and combinations, such as the tolerances of the food processing machine itself, the dimensional tolerance chain of product assembly, product assembly deviations, deviations caused by different user habits, and deviations caused by product wear. This ensures that when the cup is installed, regardless of external conditions, the lower disk assembly and the bottom of the cup are always close to each other, thus greatly minimizing the distance between the upper and lower disk assemblies. For different usage conditions, the lower disk assembly can be set to be lower than the second position in the first position, or the lower disk assembly can be set to the second position in the first position. That is, the lower disk assembly can be moved upwards to switch to the second position, or pressed downwards to switch to the second position. Furthermore, the relative relationship between the first and second positions of the lower disk assembly is not certain, meaning the lower disk assembly has a large axial displacement. Depending on different product combinations, the cup body can be used to pull the lower disk assembly upwards to the bottom of the cup, or the lower disk assembly can be pressed downwards to the second position to meet the needs of more product combinations. Of course, for some products, the dimensional tolerances of the first position and the second position may coincide. That is, when the cup and the crushing device are placed, the bottom of the cup is in close contact with the upper end of the lower disk assembly, so that the lower disk assembly does not need to switch between the first position and the second position.

[0027] 8. A limiting hole is provided in the lower disk assembly, and the lower disk assembly is moved axially along the limiting hole to switch between a first position and a second position. After the cup body and the crushing device are installed, the lower disk assembly switches from the first position to the second position under the upward suction or downward pressure of the cup body; when the cup body is detached, the lower disk assembly returns from the second position to the first position. In this process, the requirement of using displacement to change the tolerance dimensional chain of the absorber is met by relying solely on the up-and-down position switching of the lower disk assembly. In actual operation, the lower disk assembly includes axial position switching and circumferential rotational movement. When the cup body is installed, the food processor is in a non-working state, and the lower disk assembly is suctioned or pressed and switched to the second position; when the food processor is in a working state, the motor drives the lower disk assembly to rotate, and the lower disk assembly is and always in the second position. That is to say, the axial movement and circumferential rotation of the lower disk assembly will not occur simultaneously, thus ensuring that the lower disk assembly can be in a stable working state in different movement states. Even if the cup is abnormally lifted during the operation of the food processor, due to the inherent safety features of the food processor, the base will promptly cut off the power to the motor after the cup is lifted, causing the motor to stop working. The lower disk assembly can also be reset promptly after the motor stops.

[0028] 9. Preferably, the lower disk assembly is fixedly connected to the motor. Further, the motor is movably mounted on the base, and the motor and the lower disk assembly are integrated and switch between the first position and the second position. 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 integrated component. Movably mounting this integrated 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.

[0029] 10. A further provision includes an elastic element that pushes the lower disk assembly from the second position back to the first position. After the cup and 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. For a food processor, the preset first position of the lower disk assembly is typically set as a preferred position that provides optimal transmission power, or a reliable position for the machine base assembly. Therefore, when the food processor completes processing and the cup is lifted, the elastic element pushes the lower disk assembly to quickly return from the second position to the first position, ensuring that the lower disk assembly is in a preset close-fitting position during subsequent use, thus ensuring that it is still in the preset optimal close-fitting position when the cup is placed again. Of course, it should be noted that the return of the lower disk assembly from the second position to the first position does not necessarily rely entirely on the elastic element. For example, a sealed mating space is provided between the lower disk assembly and the motor shaft, containing gas. When the lower disk assembly is compressed from the first position to the second position, the gas in the sealed space is compressed. When the cup is removed, the gas pushes the lower disk assembly from the second position back to the first position. Alternatively, since both the upper disk and the lower disk assembly are provided with permanent magnets, the lower disk assembly can be attracted by the upper disk. When the cup is removed, the lower disk assembly can return from the second position to the first position by means of the attraction of the upper disk. Alternatively, the cup is provided with a magnetic element that attracts the lower disk assembly, or the base is provided with a magnetic element that repels the lower disk assembly to push the lower disk assembly from the second position back to the first position. The magnetic element can be a permanent magnet or an electromagnet. As mentioned earlier, the purpose of setting the first and second positions of the lower disk assembly is to absorb the axial tolerance chain of the food processor and the assembly and usage deviations of the product by utilizing the displacement between the first and second positions. For the food processor, the size of the tolerance chain and deviations is not large, usually on the order of millimeters. Although such a size can affect the power transmission of the lower disk assembly and the upper disk, it is relatively small compared to the size of the food processor itself. The lower disk assembly reaches the second position by being attracted or pressed down by the cup and crushing device after installation. Therefore, the lower disk assembly may not have an elastic element to push it back to its original position. That is, the position of the lower disk assembly after the cup and crushing device are lifted is the adaptive first position, and the position where the lower disk assembly moves and approaches the bottom of the cup after the cup and crushing device are installed is the second position of the lower disk assembly. In other words, the first and second positions can be changed and adjusted according to different product combinations and installation requirements, and are not limited to specific size positions. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the food processing machine with reliable transmission according to the present invention.

[0031] Figure 2 This is an exploded view of the upper and lower disk assembly structure of the first embodiment of the food processing machine with reliable transmission according to this utility model.

[0032] 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.

[0033] 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 this utility model.

[0034] 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 this utility model.

[0035] Figure 5 for Figure 4B A magnified view of part A in the diagram.

[0036] Figure 6 This diagram shows the distance and magnetic force distribution between the upper and lower disk assemblies of the food processing machine with reliable transmission according to the present invention.

[0037] 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.

[0038] Figure 8A 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 this utility model.

[0039] Figure 8B 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 this utility model.

[0040] Figure 9 This is a schematic diagram of the base structure of the third embodiment of the food processing machine with reliable transmission according to this utility model.

[0041] The labels in the diagram correspond to the following names:

[0042] 100. Base; 101. Upper housing; 102. Lower housing; 103. Motor screw; 110. Cup body; 111. Cup bottom; 112. Recessed platform; 113. Recessed 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 assembly; 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

[0043] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0044] 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.

[0045] Furthermore, it should be understood that in the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are 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 this utility model. As for positional relationships such as "upstream" and "downstream," they are based on the positional relationship when the fluid is flowing normally.

[0046] 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.

[0047] 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 utility model according to the specific circumstances.

[0048] 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.

[0049] 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.

[0050] 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 them 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 can be permanent magnets, or one can be a permanent magnet and the other a magnetic metal disc. 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] While existing technologies employ magnetic transmission, they present two opposing solutions: one uses a "floating" mating structure to mitigate impacts from the receiving components; the other directly engages the magnetic drive and transmission components. However, as the preceding analysis shows, the floating design does not truly improve vibration and noise levels. Furthermore, the floating design alters the distance between the upper and lower disk assemblies, affecting their interaction force. The direct magnetic drive solution, on the other hand, completely contradicts the technical requirement of magnetic non-contact to cut off mechanical vibration transmission, ultimately preventing the widespread adoption of magnetic non-contact transmission solutions.

[0057] 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-adjustable 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, thereby 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 can fit tightly against the bottom surface of the cup. Thus, both the lower and upper disks are positioned based on the cup bottom, and the distance between them is no longer affected by factors such as the assembly and installation of the cup body and base. This allows the distance between the lower and upper disks to be controlled at a controllable optimal value, fully guaranteeing power transmission between them. Furthermore, 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. Moreover, 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 application's 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. Furthermore, the limiting structure 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 base, ensuring a sufficiently close distance between them without direct contact. This maintains the magnetic interaction between the lower and upper disk assemblies while bearing the relative rotation between them, 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 base, it can withstand relative friction within a preset range, thus ensuring a close yet friction-free structural fit between the lower disk assembly and the cup base.

[0058] Furthermore, the lower disk assembly undergoes axial displacement, resulting in a first position and a second position. The displacement at these two positions absorbs various dimensional error chains of the product, ensuring the lower disk assembly fits closer to the bottom of the cup. The first position is the natural position of the lower disk assembly when mounted on the base, i.e., the position it holds under its own weight and the weight of the motor connected to it, without external influences such as the upper disk. When the cup and pulverizing device are placed, the lower disk assembly can be attracted upwards to reach the second position close to the bottom of the cup, or it can be pressed downwards and maintained in the second position close to the bottom of the cup. The upward or downward movement of the lower disk assembly depends on its position relative to the bottom of the cup when in the first position. If the first position of the lower disk assembly is lower than the installation position of the bottom of the cup, it is attracted upwards to the second position by the pulverizing device. If the first position of the lower disk assembly is higher than the installation position of the bottom of the cup, it is pressed downwards by the bottom of the cup to the second position. Of course, if the first position of the lower disk assembly happens to be close to the bottom of the cup, then the second position of the lower disk assembly coincides with the first position, meaning that the lower disk assembly will not be displaced. Regardless of whether the lower disk assembly is sucked up or moved down, it remains in the second position during the operation of the food processing machine, preventing the "floating" displacement seen in existing technologies. This ensures that the torque on the upper disk is stable and reliable, and also avoids vibration and noise from the upper and lower disk assemblies when they float.

[0059] 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 stable and reliable food processing machine to address the technical problems of unstable and unreliable distance between the upper and lower disk assemblies caused by factors such as product assembly tolerances, user operating habits, errors from different combinations of cup bodies and machine bases, and wear under normal use of the food processing machine when using non-contact transmission in existing food processing machines, as well as the relative friction caused by direct adsorption between magnetic drive components. The food processing machine includes a machine base, a cup body, and a pulverizing device. The machine base is equipped with a motor and a lower disk assembly driven by the motor. The cup body is detachably installed on the machine base. The pulverizing device is installed on the bottom side of the cup body. The pulverizing device can be fixedly installed on the bottom of the cup, or it can be detachably installed in the bottom of the cup body. This allows the pulverizing device to be installed when needed and removed when not needed. The pulverizing device can also be removed when cleaning the cup body to facilitate cleaning of 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. Furthermore, a limiting structure is provided between the lower disk assembly and the cup bottom. The limiting structure forms a gap between the lower disk assembly and the cup bottom, so that the lower disk assembly and the cup bottom are close to each other but do not directly contact each other. It can also ensure that the gap between them is stable and reliable. Ultimately, this allows the lower disk assembly and the upper disk to have a stable magnetic transmission distance without causing friction between the lower disk assembly and the cup bottom.

[0060] 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, the cup, upon installation, pushes the lower disk assembly to the second position via upward suction or downward pressure. 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, all contributing to the dimensional chain deviations. 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 range, resulting in stable and reliable power transmission between the lower disk assembly and the upper disk.

[0061] Specifically, such as Figures 1-9 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 100 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 bottom of the cup body 110. The pulverizing device 4 includes a pulverizing element 45 and an upper disk 41. Both the upper disk 41 and the lower disk assembly 3 include permanent magnets, so that the upper disk 41 and the lower disk assembly 3 attract each other and transmit power. When the lower disk assembly 3 is driven by the motor 2, the lower disk assembly 3 drives the upper disk 41 to be placed and ultimately drives the pulverizing element 45 to work, so as to cut and pulverize or stir 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 set at the bottom of the cup.

[0062] The food processing machine also includes a limiting structure 5. Preferably, 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 surface 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 combination of the two parts 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.

[0063] 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 6As 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.

[0064] 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 positioning the lower disk assembly close to the cup bottom to ensure sufficient distance between the lower and upper disks. Furthermore, a limiting structure at the rotation center of the lower disk assembly creates a gap between it and the cup bottom, preventing direct friction. This application places the pulverizing device inside the cup bottom. Whether the pulverizing device is fixed or detachably mounted inside the cup bottom, it can fully conform to the bottom during use, minimizing the distance between the upper disk and the cup bottom. Simultaneously, the upper disk, directly positioned inside the cup bottom, is unaffected by dimensional chain errors in the cup assembly. The thickness of the cup body, particularly the bottom, depends on the product's functional requirements. For example, if the cup 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 to control is the dimension of the lower disk assembly from the outer side of the cup bottom. The lower disk assembly is directly positioned close to the cup bottom, and clamped between the lower disk assembly and the cup bottom using the limiting structure. This close proximity absorbs various dimensional tolerances and installation deviations of the food processing machine, ensuring that the distance between the lower disk assembly and the cup bottom remains within a preset range. Therefore, based on the inner and outer dimensions of the cup bottom, the distance between the lower disk assembly and the upper disk is always within a controllable preset dimension, unaffected by the various dimensional tolerances of the food processing machine, ensuring stable and selectable power transmission between the lower and upper disks. The limiting structure prevents direct contact between the lower disk assembly and the cup bottom, avoiding friction during operation that could affect the normal operation of the lower disk assembly.

[0065] As a specific embodiment of the stable and reliable food processing machine described in this utility model, 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 located 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 provided at the bottom of the cup body 110. 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. Simultaneously, the lower disk assembly 3 is inserted into the recessed groove 113, bringing it close to the bottom of the cup body 110. The cooperation of the positioning ring and the positioning groove, as well as the cooperation of the lower disk assembly and the recessed groove, ensures that the lower disk assembly fits properly into 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 as the positioning ring in axial height; or, the lower disk assembly may be lower than the positioning ring in axial height, so that the positioning ring can properly protect the lower disk assembly.

[0066] 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.

[0067] 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 an upper bearing 434 and a shaft seal 435. The cutter shaft 44 passes through the upper 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.

[0068] The lower disk assembly 3 has a limiting structure 5 at its upper end. The limiting structure 5 is installed at the rotation center of the lower disk assembly 3 and is located between the lower disk assembly 3 and the bottom of the cup body 110.

[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, allowing the lower disk assembly 3 to move axially and have a first position and a second position. 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 bottom of the cup. 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 a second position close to the cup body 110. Using the limiting hole and limiting post, the lower disk assembly 3 can move axially along the motor shaft without rotating circumferentially. Thus, the lower disk assembly can switch from the first position to the second position. When the food processing machine is working, the motor can drive the lower disk assembly to rotate, and further drive the upper disk to rotate, without relative rotation between the motor and the lower disk assembly. The displacement and circumferential rotation of the lower disk assembly are completed at different time intervals: during the installation of the cup body and the crushing device, the lower disk assembly is sucked upwards to a second position close to the bottom of the cup, and the limiting structure clamps the lower disk assembly and 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 process, because the lower disk assembly is limited to the second position, it will not have axial displacement during rotation, ensuring stable output between the motor and the lower disk assembly. A return spring is further provided. Utilizing the spring force, 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 rotation center of the lower disk assembly 3 is also provided with a mounting hole 312. 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. The bearing 51 is fixed in the mounting hole 312 by the first rotating part. When the lower disk assembly 3 is in the second position, the second rotating part contacts the bottom of the cup.

[0071] 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 513 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.

[0072] The lower disk assembly 31 has a mounting cavity 313 at its top, and a lower magnet 32 ​​made of permanent magnet is disposed within the mounting cavity 313. The lower disk assembly 3 also includes a lower cover plate 33 that closes the mounting cavity 313. 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 magnet 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 radius and circumference of the mounting cavity 313 are larger, allowing for the installation of more lower magnets. At the same height, the lower magnet 32 ​​can also have a stronger magnetic flux, thereby enhancing the magnetism of the lower disk assembly 3.

[0073] 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 reaches 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. Preferably, L ≤ 2mm, meaning the upper surface of the lower disk assembly is close to but does not contact the outer side of the cup bottom, ensuring a sufficiently close distance between the lower disk assembly and the upper disk while 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.

[0074] 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 6This 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 body. 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.

[0075] 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.

[0076] 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 lower disk assembly 3 reaching its second position when the shredder 4 is installed in place. 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, in the second position, the lower disk assembly 3 is subjected to the magnetic attraction of the crushing device 4 and moves upward. At this time, 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 the distances D2 and D3 is the amount of upward displacement of the lower disk assembly, which is also the error range of the dimensional tolerance chain of the food processing machine assembly that the lower disk assembly can absorb.

[0077] 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.

[0078] 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.

[0079] 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. Furthermore, by setting the lower disk assembly to have 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 machine 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 remains within a preset range, thus ensuring stable and reliable cutting and crushing of the crushed parts. Furthermore, once the upper disk is installed in place, it attracts the lower disk assembly to the second position, and the lower disk assembly can always remain in the second position during operation, rather than "floating" as in the prior art. That is, the distance between the upper and lower disk assemblies does not change during operation and is always at the preset optimal distance, thereby ensuring stable and reliable power transmission of the food processing machine.

[0080] 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.

[0081] It should be noted that, for the actual product, since the lower disk assembly rises to the second position based on the magnetic attraction of the upper disk, the cup body and the pulverizing device must be installed before it can rise to the second position. This raises the question of how to determine the change in the movement of the lower disk assembly from the first position to the second position. One possible approach is to paint the upper surface of the lower disk assembly. When only the cup body is installed on the base without the pulverizing device, the lower disk assembly will not change from the first position to the second position due to the lack of magnetic attraction from the upper disk, and therefore the paint on the top of the lower disk assembly will not adhere to the bottom of the cup. After the pulverizing device is installed, the upper disk attracts the lower disk assembly to the second position. At this point, the lower disk assembly is close to the outer side of the bottom of the cup, especially when a pusher is provided, it is also in contact with the bottom of the cup. Throughout this process, the paint on the top of the lower disk assembly will adhere to the outer side of the bottom of the cup, thus determining whether the lower disk assembly has moved from the first position to the second position close to the bottom of the cup.

[0082] 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.

[0083] 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.

[0084] Understandably, the lower disk assembly may also be free of a reset spring, and may rely solely on the gravity of the lower disk assembly to reset it from the second position to the first position.

[0085] Understandably, the crushing device is fixed to the inner side of the cup bottom. For example, the inner side of the cup bottom is provided with a fixing post or fixing hole, and the crushing device is fixed to the inner side of the cup bottom through the fixing post or fixing hole. The upper disk and the crushing component are rotatably arranged at the bottom of the cup.

[0086] Understandably, the limiting structure only includes a bearing disposed in the mounting hole of the lower disk assembly. The bearing includes an inner ring protruding from the upper end face of the lower disk assembly. The outer ring of the 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.

[0087] 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.

[0088] Understandably, the limiting structure only includes a bearing located at the bottom of the cup corresponding to the rotation center of the lower disk assembly. The fixed part of the bearing is connected to the bottom of the cup, and the rotating part 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 work.

[0089] As another preferred embodiment of this application, such as Figure 7 , Figure 8A , Figure 8B As shown, the lower disk assembly has a first position and a second position that can move axially. When the cup body is rotated, the cup body presses the lower disk assembly, causing the lower disk assembly to move downward and reach the second position. The limiting structure is clamped between the lower disk assembly and the bottom of the cup, so that a gap is formed between the lower disk assembly and the bottom of the cup.

[0090] like Figure 7As shown, 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, allowing the lower disk body 31 to move between the locking screw 22 and the top end of the limiting post 211. The return spring 23 is clamped between the limiting post 211 and the lower disk body 31, pushing the lower disk body 31 to be tightly against the locking screw 22. When the lower disk assembly 3 is in the first position, the return spring 23 pushes the lower disk assembly 3 to its highest position. When the cup body 110 is placed, the cup body 110 presses against the lower disk assembly 3 through the limiting structure 5, causing the lower disk assembly 3 to move axially downward at the limiting post 211. When the cup body 110 is installed in place, the lower disk assembly 3 is displaced to the lowest point that mates with the cup body 110. It should be noted that, due to different cup bodies having different assembly errors, the second position does not refer to a specific displacement dimension, but rather to the lowest point that the lower disk assembly can reach when the cup body is installed in place. When the cup body 110 is removed, the return spring 23 pushes the lower disk assembly back from the second position to the first position. By utilizing the limiting holes and limiting posts, the lower disk assembly 3 can rotate while moving axially, which facilitates switching between the first and second positions of the lower disk assembly 3 and ensures stable and reliable power transmission between the motor shaft and the lower disk assembly. Furthermore, a reset spring is provided. By utilizing the elastic force of the reset spring, when the crushing device is removed, the combined force of the gravity of the lower disk assembly and the elastic force of the reset spring allows the lower disk assembly to quickly reset to the first position.

[0091] like Figure 8A , Figure 8B As shown, where, Figure 8A The diagram shows the lower disk assembly 3 in its first position when the shredder 4 is not installed. Figure 8B The diagram shows the cup body (not shown) and the pulverizing device 4 installed in place, with the lower disk assembly 3 pressed into a second position. (See diagram for reference.) Figure 8A As shown, in the first position, the distance between the upper end face and the top face of the lower disk assembly 3 is D2; Figure 4BAs shown, in the second position, the lower disk assembly 3 is compressed by the cup body (not shown) and displaces downward. The distance between the upper surface of the lower disk assembly 3 and the top surface of the motor is D3. Preferably, D2 ≥ D3. The difference between the distances D2 and D3 is the upward displacement of the lower disk assembly, which is also the error range of the dimensional tolerance chain of the food processing machine assembly that the lower disk assembly can absorb.

[0092] Because the lower disk assembly in the first position is pre-set to be close to or coincide with the bottom of the cup, when the cup is installed on the base, the cup directly presses the lower disk assembly to the second position. This action is completed as the cup is installed. In other words, when the user operates the cup and installs it, the cup compresses the lower disk assembly and forces it to the pre-set second position. During the operation of the food processing machine, the lower disk assembly remains in the second position. By directly utilizing the fact that the pre-set dimension of the first position is greater than the maximum deviation of the lower disk assembly, including dimensional chain deviations caused by assembly tolerances of the base, cup assembly tolerances, fit errors between the cup and base, user operation errors, errors of different cup components, and product wear errors, it is ensured that regardless of how different cups are installed or used, the bottom of the cup and the lower disk assembly are always at a pre-set minimum distance. The limiting structure is then used to clamp the lower disk assembly and the cup bottom, so that the distance between the lower disk assembly and the cup bottom is close enough but not in direct contact. Under the premise of ensuring the magnetic interaction force between the lower disk assembly and the upper disk, the limiting structure is used to withstand the relative rotation between the lower disk assembly and the cup bottom, avoiding direct friction between the lower disk assembly and the cup bottom.

[0093] 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.

[0094] As another preferred embodiment of this application, such as Figure 9As shown, the lower disk assembly is fixedly connected to the motor, and the motor is movably mounted on the base. When the cup and the crushing device are installed in place, the lower disk assembly and the motor switch from the first position to the second position together under the pushing action of the cup and the crushing device, so as to drive the upper disk.

[0095] Specifically, such as Figure 9 As shown, the base 100 includes an upper housing 101 and a lower housing 102. The motor 2 includes a motor mounting bracket 24. The upper housing 101 and the lower housing 102 are clamped by interlocking fixing posts and positioning holes to install and fix the motor 2 within the base 100. Preferably, the upper housing 101 and the lower housing 102 are fixed together by motor screws 103, 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 gravity and 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.

[0096] Understandably, the motor and the lower disk assembly are together in a first position with sufficient height. When the cup is placed, the cup presses against the lower disk assembly and the motor, causing the lower disk assembly and the motor to move downwards together. When the cup is in place, the lower disk assembly and the motor reach a second position together. In this way, regardless of the dimensional tolerance of the food processing machine or how the cup is installed, the optimal transmission distance can be maintained between the lower disk assembly and the upper disk.

[0097] 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.

[0098] 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.

[0099] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the present utility model are covered by the scope of the claims of the present utility model, and will not be listed here.

Claims

1. A food processing machine with reliable transmission, characterized in that, The food processing machine includes... The base is equipped with a motor and a lower disk assembly driven by the motor; The cup body is detachably mounted on the base, and the cup body is provided with a crushing device installed on the inner side of the bottom of the cup; A shredding device includes a shredding component and an upper disk that attracts the lower disk assembly and drives the shredding component to operate under the drive of the lower disk assembly; A limiting structure is disposed between the lower disk assembly and the cup bottom. The limiting structure is located at the rotation center of the lower disk assembly and contacts both the lower disk assembly and the cup bottom. The limiting structure also creates a gap between the lower disk assembly and the cup bottom.

2. The food processing machine with reliable transmission as described in claim 1, characterized in that, The limiting structure includes a bearing, which includes a first rotating part and a second rotating part that rotate relative to each other. The first rotating part and the second rotating part respectively contact the lower disk assembly and the cup bottom, so that the lower disk assembly and the cup bottom rotate relative to each other through the bearing.

3. The food processing machine with reliable transmission as described in claim 2, characterized in that, The lower disk assembly has a mounting hole at its rotation center to accommodate the bearing. The first rotating part is fixedly connected to the lower disk assembly, and the second rotating part protrudes from the upper surface of the lower disk assembly. The second rotating part in the second position contacts the bottom of the cup.

4. The food processing machine with reliable transmission as described in claim 2, characterized in that, The permanent magnet of the lower disk assembly surrounds the outer periphery of the bearing.

5. The food processing machine with reliable transmission as described in claim 2, characterized in that, The second rotating part includes an abutment that protrudes from the upper surface of the lower disk assembly.

6. The food processing machine with reliable transmission as described in claim 1, characterized in that, The limiting structure includes a protrusion extending downward from the bottom of the cup, the protrusion contacting the lower disk assembly and rotating relative to the lower disk assembly; Alternatively, the limiting structure includes a protrusion extending upward from the upper disk, the protrusion contacting the bottom of the cup and rotating relative to the bottom of the cup.

7. The food processing machine with reliable transmission as described in claim 1, characterized in that, The lower disk assembly has a first position and a second position where, after the cup is placed, it is pushed by the cup to move axially and close to the outer side of the cup bottom. The limiting structure creates a gap between the lower disk assembly and the cup bottom.

8. The food processing machine with reliable transmission as described in claim 7, characterized in that, The lower disk assembly is provided with a limiting hole fitted onto the motor shaft of the motor, and the lower disk assembly can move axially along the motor shaft and the limiting hole to switch between a first position and a second position.

9. The food processing machine with reliable transmission as described in claim 7, characterized in that, The lower disk assembly is fixedly connected to the motor, which is movably mounted on the base. The motor and the lower disk assembly can move axially to switch between a first position and a second position.

10. The food processing machine with reliable transmission as described in claim 7, characterized in that, The base also includes a second elastic element that allows the lower disk assembly to return from the second position to the first position.

Images