Food processor stable in transmission

Abstract

The utility model discloses a food processor with stable transmission, which comprises a base provided with a lower magnetic disk assembly; the cup body is provided with a crushing device; the crushing device comprises an upper magnetic disk which is driven by a lower magnetic disk assembly to drive a crushing part to work; the cup body is matched with the machine base and limits the lower magnetic disc assembly and the smashing device to be concentric, and the limiting structure is arranged between the lower magnetic disc assembly and the cup bottom; the lower disk assembly has a first position and a second position; the upper magnetic disk upwards adsorbs the lower magnetic disk assembly from the first position to the second position, the lower magnetic disk assembly in the second position and the cup bottom are in contact with the limiting structure at the same time, and the limiting structure enables a gap to be formed between the lower magnetic disk assembly and the cup bottom. The assembly tolerance and the use error are absorbed by the displacement of the lower magnetic disk assembly in axial position switching, the distance between the lower magnetic disk assembly and the upper magnetic disk is ensured to be at the preset minimum, a gap is formed between the lower magnetic disk assembly and the cup bottom by utilizing the limiting structure, direct contact is avoided, stable transmission is ensured, and mutual friction is avoided.

Description

Technical Field

[0001] The present application relates to the field of food processing, and in particular to a food processing machine having a machine base and a cup body and adopting magnetic non-contact transmission processing. Background Art

[0002] Existing blenders or food processors typically include a base and a detachable cup mounted on the base. The base is equipped with a motor, and the cup is equipped with a crushing element for crushing food. The rotation of the motor drives the crushing element to rotate, thereby achieving the cutting and crushing of food. Since the motor and crushing element of the blender rotate at high speed during operation, the impact generated by the collision between the crushing element and the food reacts to the motor through the connecting components, causing the blender to vibrate and make more noise during operation, resulting in a poor user experience. Therefore, how to reduce the reaction force of the crushing element on the motor, or even cut off the mechanical transmission between the two, becomes the primary issue in solving vibration and noise problems.

[0003] Based on this, the applicant proposed a non-contact transmission solution, such as the Chinese utility model patent

[0004] CN201020015043.4 discloses a non-contact soymilk maker, in which a magnetic non-contact upper coupling and lower coupling are provided between the motor and the pulverizing tool, including upper and lower transmission modes and internal and external transmission modes. Since the couplings do not directly contact each other, noise and vibration are significantly reduced during operation. Based on this, the applicant has further proposed an improved non-contact transmission scheme, such as Chinese invention patent CN201120194553.7, which discloses an indirect transmission food processing machine, including an active coupling provided on the motor power output shaft and a driven coupling connected to the pulverizing tool. The driven coupling is provided with a certain floating space in the axial direction, so that the pulverizing tool can slide appropriately in the axial direction to disengage stuck materials and enable the pulverizing tool to operate normally. This solution can configure the cup body into a completely enclosed structure with no mechanical connection holes at the bottom, thereby better solving the leakage problem of the mixing cup.

[0005] As previously mentioned, the applicant also configured the driven coupling and pulverizing blade to have an axial floating space. While this solution solves the technical problem of blade jamming, it does not fundamentally address the issue. This is because the blade jamming is caused by the different power of the pulverizing blades, that is, insufficient magnetic interaction between the driving coupling and the driven coupling. The solution to this problem should be to increase the magnetic interaction force, including increasing the magnetic charge of the magnets and reducing the distance between them. However, the floating arrangement of the prior art further increases the distance between the driven coupling and the driving coupling when the driven coupling floats upward, further reducing the magnetic interaction force between the two. In other words, the prior art provides a technical solution that contradicts this. In particular, when the driven coupling and pulverizing blade are disposed within the cup body and have an axial floating space, if the driven coupling and pulverizing blade are continuously stuck at the upper end of the floating space, they will always be in a low torque state, thereby affecting the power transmission of the driven coupling and forming a vicious cycle. At the same time, this setting method cannot control the gap between the active coupling and the cup body. If the active coupling and the cup body are also at a large distance, the food processor may not even work properly.

[0006] In the prior art, there is also a solution that uses magnetism for contact transmission. For example, Chinese utility model patent CN202222307890.3 discloses a food processor comprising a machine head and a blending blade assembly. The machine head includes a motor and a magnetic drive member connected to the motor, and the blending blade assembly includes a magnetic drive member. The magnetic drive member is an electromagnet. When powered on, the magnetic drive member becomes magnetically attracted to the magnetic drive member, and the motor drives the blending blade to rotate within the food processor. When powered off, the magnetic drive member demagnetizes and separates from the magnetic drive member, and the magnetic drive member resets under the elastic force of the elastic reset member. In other words, this solution is a transmission solution that utilizes magnetic attraction. The magnetic drive member and the magnetic transmission member 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 member and the magnetic drive member. It is not a "non-contact" transmission solution with complete mechanical isolation; secondly, the magnetic drive member and the magnetic transmission member are directly attracted to each other, and during the working process, the two are required to rotate synchronously. If there is a speed difference between the two, relative friction will occur between the magnetic drive member and the magnetic transmission member, which will affect the normal operation of the two; furthermore, since the magnetic drive member and the magnetic transmission member need to be directly attracted, and the magnetic transmission member needs to further drive the stirring blade located in the cooking cup assembly to rotate, the stirring cup assembly must be provided with a transmission structure that passes through the stirring cup assembly, for example, a transmission shaft needs to be provided to pass through the cup body or the cup lid, that is, the stirring cup assembly cannot be configured as a truly completely mechanically through-hole-free solution.

[0007] Various solutions in the existing technology do not address the needs of magnetic transmission solutions, that is, under the premise of non-contact, the distance between the upper coupling and the lower coupling that transmit to each other is small enough, and the distance between the upper coupling and the lower coupling can be guaranteed to be stable, and the torque transmitted between the lower coupling and the upper coupling will not fluctuate due to the jump of the distance. Summary of the Invention

[0008] The purpose of the utility model is to provide a food processing machine with stable transmission, so as to solve the technical problems in the prior art of food processing machines with a detachable cup body relative to a machine base, such as large variations in the distance between the lower magnetic disk assembly and the cup body caused by the superposition of multiple factors such as accessory tolerances, product assembly tolerance dimension chains, product assembly deviations, user usage deviations, and product wear deviations, resulting in unstable magnetic interaction forces between the upper and lower magnetic disk assemblies due to poor distance stability, and mutual friction between directly attracted magnetic drive structures, which easily leads to insufficient power transmission.

[0009] In order to solve the above technical problems, the present application provides a food processing machine with stable transmission, wherein the food processing machine includes: a machine base, provided with a motor and a lower magnetic disk assembly driven by the motor; a cup body, detachably mounted on the machine base, wherein the cup body is provided with a crushing device mounted on the inner side of the cup bottom; the crushing device includes a crushing piece and an upper magnetic disk that is attracted to the lower magnetic disk assembly and drives 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 and located at the rotation center of the lower magnetic disk assembly; a lower magnetic disk assembly, wherein the lower magnetic disk assembly includes a disk body and a permanent magnet arranged on the disk body, the lower magnetic disk assembly having a first position in which the crushing piece is not placed and a second position in which the crushing piece is placed; wherein: the upper magnetic disk attracts the lower magnetic disk assembly upward from the first position to the second position, and the lower magnetic disk assembly and the cup bottom in the second position are in contact with the limiting structure at the same time, and the limiting structure creates a gap between the lower magnetic disk assembly and the cup bottom.

[0010] Preferably, the limiting structure includes a bearing, and the bearing includes a first rotating part and a second rotating part that rotate relative to each other, and the first rotating part and the second rotating part are in contact with the lower disk assembly and the cup bottom respectively, so that the lower disk assembly and the cup bottom rotate relative to each other through the bearing.

[0011] 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 surface of the lower disk assembly, and the second rotating part in the second position contacts the bottom of the cup.

[0012] Preferably, the permanent magnet of the lower magnetic disk assembly surrounds the outer periphery of the bearing.

[0013] Preferably, the second rotating portion is further provided with an abutment member, and the abutment member protrudes from the upper end surface of the lower magnetic disk assembly.

[0014] Preferably, the crushing device is detachably arranged on the inner side of the bottom of the cup body.

[0015] Preferably, the limiting structure includes a protrusion extending downward from the cup bottom, the protrusion contacts the lower disk assembly and rotates relative to the lower disk assembly; or, the limiting structure includes a protrusion extending upward from the upper disk, the protrusion contacts the cup bottom and rotates relative to the cup bottom.

[0016] Preferably, the gap L between the lower magnetic disk assembly and the cup bottom is ≤ 2 mm.

[0017] Preferably, the lower disk assembly is provided with a limiting hole sleeved on the motor shaft, and the lower disk assembly can move along the axial direction of the limiting hole to switch between the first position and the second position.

[0018] Preferably, the lower disk assembly is fixedly connected to the motor, and the motor is movably mounted on the base. The motor and the lower disk assembly are switched from the first position to the second position under the adsorption action of the upper disk.

[0019] Preferably, the base is further provided with an elastic member for pushing the lower disk assembly to switch from the second position to the first position.

[0020] Preferably, a sinking platform recessed toward the interior of the cup body is provided on the outer side of the cup bottom, the lower magnetic disk assembly extends into the sinking platform, and the limiting structure is located between the sinking platform and the lower magnetic disk assembly.

[0021] Compared with the existing technology, this application has at least the following technical effects:

[0022] 1. This application continues the applicant's technical direction in contactless transmission, utilizing a mutually magnetically attracted upper and lower magnetic disk assembly to achieve power transmission between the motor and the pulverizing device, fundamentally preventing the pulverizer from transmitting vibration and noise during operation to the motor. The pulverizing device is positioned at the bottom of a cup, allowing it to fully adhere to the cup bottom. Furthermore, the lower magnetic disk assembly is configured to have a first position and a second position, with the upper magnetic disk being used to upwardly attract the lower magnetic disk assembly from the first position to the second position close to the cup bottom. Consequently, the distance between the upper and lower magnetic disk assemblies is solely dependent on the distances from the upper magnetic disk to the cup bottom, the distance from the lower magnetic disk assembly to the cup bottom, and the thickness of the cup bottom itself, and is independent of the assembly relationship of the food processor. Therefore, the crushing device is positioned at the bottom of the cup to ensure that the distance between the upper magnetic disk and the cup bottom is at a controllable minimum. The distance between the lower magnetic disk assembly, which is attracted to the second position by the upper magnetic disk, and the cup bottom is also at a controllable minimum. The limiting structure ensures that the distance between the lower magnetic disk assembly and the cup bottom is stable and reliable. Thus, the distance between the lower magnetic disk assembly and the upper magnetic disk is always at a stable, reliable, and controllable minimum, thereby achieving stable and reliable power transmission between the lower magnetic disk assembly and the upper magnetic disk without contact. The lower magnetic disk assembly is configured to have a first position and a second position. Typically, the first position is axially lower than the second position. The first position refers to the natural state of the lower magnetic disk assembly when it is mounted on the base, without the upper magnetic disk positioned therein, and without any external forces acting on it. Correspondingly, the second position refers to the state in which, after the cup body and the crushing device within the cup body are mounted on the base, the upper magnetic disk of the crushing device attracts the lower magnetic disk assembly, causing it to move upward to a position close to the cup bottom. The lower disk assembly includes a disk body and a permanent magnet arranged on the disk body. Preferably, the permanent magnet is located at the upper end of the disk body, and the disk body is used to fix the permanent magnet, ensuring that the permanent magnet can better achieve the purpose of magnetic drive and has better structural strength. At the same time, the permanent magnet can be set in multiple numbers, and the magnetic force between the upper disk and the lower disk assembly can be enhanced by magnetic arrangement and combination. Furthermore, the disk body can accommodate the permanent magnet by providing a closed installation cavity to avoid the permanent magnet being corroded by dust and liquid when it leaks directly, thereby affecting the magnetism of the permanent magnet, and ensuring that the lower disk assembly can be in a stable output state for a longer period of time.

[0023] Since the lower disk assembly is adsorbed by the upper disk from the first position to the second position, and the lower disk assembly that reaches the second position is indirectly in contact with the cup bottom by clamping the limiting structure, the lower disk assembly in the first position and the cup bottom will have a "larger" distance than the second position. Such a distance ensures that the lower disk assembly in the first position will not directly contact the cup body in any way. For example, when the crushing device is detachably arranged in the cup body, only the cup body is installed without the crushing device, since there is no adsorption effect of the upper disk, the lower disk assembly is always in the first position, and there is always a large distance between it and the cup body to prevent the lower disk assembly from affecting the cup body. A displacement is provided between the first and second positions. This displacement is greater than the combined effect of the product's assembly tolerance band and usage variations. This displacement is used to accommodate dimensional variations caused by various factors, including component tolerances, product assembly tolerances, product assembly variations, variations caused by user habits, and product wear. This allows the lower magnetic disk assembly to directly abut the cup bottom, unaffected by other components or operational influences. This effectively ensures that the distance between the upper and lower magnetic disk assemblies remains at a stable and reliable minimum. In other words, for different machine bases, cup bodies, and food processors, the lower magnetic disk assembly can be switched between the first and second positions to maintain the minimum distance between the lower magnetic disk assembly and the upper magnetic disk. It should be noted that since the second position depends on the installation of the cup body and the crushing device, and under the adsorption action of the upper magnetic disk, the lower magnetic disk assembly moves up and close to the bottom of the cup, and due to the assembly deviation of the cup body and the machine base itself, the relative position of the cup body and the machine base is not fixed. Therefore, the second position of the lower magnetic disk assembly does not refer to a fixed specific position, but refers to the position where the lower magnetic disk assembly moves up and is close to the bottom of the cup after the cup body and the crushing device are installed.

[0024] The main purpose of providing a limiting structure is to provide a safe gap between the lower disk assembly and the cup bottom that allows for rotation between the lower disk assembly and the cup bottom, thereby ensuring that the lower disk assembly can stably and reliably rotate close to the cup bottom and drive the upper disk to operate. Although the distance between the lower disk assembly and the upper disk is smaller when the lower disk assembly and the cup bottom are in direct contact, the lower disk assembly in direct contact will rotate relative to the cup bottom and rub against it during operation. The limiting structure is clamped between the lower disk assembly and the cup bottom, and is utilized to perform the relative rotation function. This effectively controls the distance between the lower disk assembly and the upper disk, while avoiding relative friction caused by large-area contact between the lower disk assembly and the cup bottom, allowing the lower disk assembly to stably and reliably rotate relative to the cup bottom. Because the purpose of the limiting structure is to maintain a stable and reliable gap between the lower magnetic disk assembly and the cup bottom, when the lower magnetic disk assembly is in the first position and only the cup body is installed without the pulverizing device, the lower magnetic disk assembly does not move upward due to the lack of magnetic attraction from the upper magnetic disk, resulting in a relatively large distance between the lower magnetic disk assembly and the cup bottom. In this case, the limiting structure is not required to maintain this distance between the lower magnetic disk assembly and the cup bottom. Therefore, when the lower magnetic disk assembly is in the first position, the limiting structure does not need to contact both the lower magnetic disk assembly and the cup bottom simultaneously. In this case, the limiting structure can be positioned on the lower magnetic disk assembly without contacting the cup bottom, or positioned on the cup bottom without contacting the lower magnetic disk assembly. The limiting structure can also be comprised of two parts, one on the lower magnetic disk assembly and one on the cup bottom. In this case, although the limiting structure is positioned on both the lower magnetic disk assembly and the cup bottom, the two parts are separated from each other and do not require contact for power transmission. Therefore, in this case, the limiting structure still does not contact both the lower magnetic disk assembly and the cup bottom simultaneously. After the cup body is mounted on the machine base and the crushing device is in place, the upper magnetic disk attracts the lower magnetic disk assembly upward to the second position. It should be noted that the lower magnetic disk assembly is attracted from the first position to the second position by the magnetic attraction of the upper magnetic disk. Therefore, when the cup body is simply mounted on the machine base, the lower magnetic disk assembly does not necessarily switch to the second position. At this time, the crushing function is not required in the cup body, and the lower magnetic disk assembly does not need to be in close proximity for power transmission. When the lower magnetic disk assembly is in the second position, the limiting structure is in contact with both the lower magnetic disk assembly and the cup bottom, and the limiting structure is sandwiched between the lower magnetic disk assembly and the cup bottom, so that there is a gap between the lower magnetic disk assembly and the cup bottom.

[0025] The limiting structure ensures a gap between the lower magnetic disk assembly and the cup base, while maintaining an optimal distance. This prevents friction between the lower magnetic disk assembly and the cup base during rotation, as would occur if the lower magnetic disk assembly directly contacted the cup base. The limiting structure is directly attached to the lower magnetic disk assembly or the cup base, and both the limiting structure and the lower magnetic disk assembly, or the limiting structure and the cup base, are directly assembled. This effectively ensures assembly tolerances between the limiting structure and the lower magnetic disk assembly or the cup base. Furthermore, further processing can be performed after the limiting structure and the lower magnetic disk assembly or the cup base are assembled, achieving even higher assembly precision. With this arrangement, when the cup body and the pulverizing device are mounted on the machine base, the upper magnetic disk can consistently attract the lower magnetic disk assembly to the second position, regardless of how the cup body is mounted. The limiting structure further ensures that the lower magnetic disk assembly, while remaining close to the cup bottom, maintains a gap between them. The ultimate goal is to minimize the distance between the upper and lower magnetic disk assemblies, thereby maximizing the magnetic interaction between the lower and upper magnetic disks. This allows the motor's torque to be transferred from the lower magnetic disk assembly to the upper magnetic disk to the greatest extent possible, ensuring sufficient torque between the upper magnetic disk and the crushing element for comminution and cutting. This eliminates the vibration and noise transfer that occurs when the motor and crushing element are in direct mechanical contact, while also ensuring power transmission between the motor and crushing element, providing users with a food processor with low noise reduction and stable and reliable power transmission.

[0026] 2. The bearing utilizes the relative rotation between the lower disk assembly and the cup base to achieve stable and reliable power transmission while minimizing the distance between the lower disk assembly and the cup base. Furthermore, the bearing includes a first rotating portion and a second rotating portion, one of which is mounted on the outside of the lower disk assembly or the cup base, and the other contacts the opposing cup base or lower disk assembly. For example, the bearing is mounted on the lower disk assembly via the first rotating portion. When the lower disk assembly reaches the second position, the second rotating portion contacts the cup base, creating a gap between the upper end surface of the lower disk assembly and the cup base. When the lower disk assembly rotates, the first rotating portion rotates with the lower disk assembly, while the second rotating portion remains stationary relative to the cup base. Thus, the relative rotation of the first and second rotating portions enables non-contact relative rotation between the lower disk assembly and the cup base. The bearing itself is capable of withstanding high speeds and prolonged relative rotation, thereby meeting the high speed requirements of the lower disk assembly and ensuring the stability and reliability of the food processor during extended operation.

[0027] 3. A mounting hole is provided at the rotational center of the lower disk assembly, and the bearing is positioned within the mounting hole. The second rotating portion of the bearing protrudes from the upper end surface of the lower disk assembly. The height of the bearing protruding from the lower disk assembly defines the gap between the upper end surface of the lower disk assembly and the cup bottom. Thus, when the lower disk assembly is in the second position, the second rotating portion of the bearing directly abuts the cup bottom, creating a gap between the upper end surface of the lower disk assembly and the cup bottom. This eliminates direct friction between the lower disk assembly and the cup bottom during rotation. The bearing is directly mounted on the lower disk assembly, creating a single-level mounting relationship between the two. This facilitates control of the mating dimensions of the lower disk assembly and the bearing, enabling reliable control of the bearing's protrusion from the upper end surface of the lower disk assembly and ultimately controlling the gap between the lower disk assembly and the cup bottom, ensuring a stable, reliable, and minimal distance between the lower disk assembly and the upper disk.

[0028] 4. The permanent magnets of the lower disk assembly are arranged around the outer periphery of the bearing. These permanent magnets can be directly adjacent to the cup bottom without direct contact with it, ultimately ensuring a sufficiently small distance between the lower disk assembly and the permanent magnets of the upper disk, while maintaining stability and reliability under the control of the bearing. The bearing at the rotational center of the lower disk assembly does not need to have an excessively large diameter. During high-speed rotation of the lower disk assembly, the linear velocity of the bearing itself is relatively small, ensuring that the bearing can withstand higher speed requirements. The permanent magnets surrounding the outer periphery of the bearing have a larger diameter and circumference, allowing for a larger volume with the same thickness. This increases the magnetic flux of the permanent magnets, enhancing the magnetic interaction between the lower and upper disks, and achieving 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 interaction between them. In this case, the permanent magnets surrounding the outer periphery of the bearing prevent the permanent magnets from exerting a strong magnetic attraction on the bearing when their poles are directly opposite each other, thereby affecting the stable and reliable operation of the bearing itself.

[0029] 5. Generally speaking, standard bearings are selected to reduce costs. However, the configuration of the first and second rotating parts of standard bearings, as well as the height of the second rotating part protruding relative to the upper end surface of the lower disk assembly, may not fully meet the specific requirements of a food processor. Preferably, an abutment is provided on the second rotating part. When the lower disk assembly is in the second position, the abutment contacts the cup bottom. This allows the distance between the lower disk assembly and the cup bottom to be controlled. In particular, after the bearing is assembled with the lower disk assembly, the abutment can be machined to more precisely control the height of the abutment protruding from the lower disk assembly, thereby precisely controlling the distance between the lower disk assembly and the cup bottom. The lower disk assembly switches from the first position to the second position instantaneously due to the installation of the upper disk. Due to the high relative speed, there may be impact between the lower disk assembly and the cup bottom. For example, when the bearing and the cup bottom are both made of metal, the hard impact causes significant vibration and may also cause deformation of the lower disk assembly or the cup bottom over extended use. Preferably, the abutment member is made of plastic, which provides a certain degree of cushioning to prevent direct hard impact. Furthermore, although the bearing supports relative rotation between the lower disk assembly and the cup bottom, thereby avoiding friction between the lower disk assembly and the cup bottom, and the abutment member does not experience relative rotation during contact with the cup bottom, the abutment member is subjected to the magnetic attraction between the lower disk assembly and the upper disk for extended periods during operation, and may wear over the life of the food processor. In this case, the abutment member can be directly replaced to avoid replacing other, more expensive accessories, achieving low-cost lifecycle maintenance.

[0030] 6. As previously mentioned, the provision of a non-contact magnetic transmission structure prevents the pulverizer from transmitting vibration and noise to the main unit and motor during operation. Furthermore, the non-contact magnetic transmission structure facilitates the configuration of the cup body with a completely enclosed bottom. Thus, the pulverizing device can be located inside the cup bottom. Preferably, the pulverizing device is detachably located inside the cup bottom. This arrangement, while maintaining the aforementioned advantages, allows the pulverizing device to be installed when necessary and omitted when not necessary. For example, if the food processor only requires a heating or cooking function, such as boiling water, the pulverizing device can be installed to achieve the corresponding function. Omitting the pulverizing device also simplifies the internal structure of the cup body, making operations such as cleaning the interior of the cup body more convenient.

[0031] It should be noted that the lower magnetic disk assembly relies on the suction effect of the upper magnetic disk to switch from the first position to the second position, making the pulverizing device removable. Therefore, when only the cup body is installed, the lower magnetic disk assembly does not switch from the first position to the second position due to the lack of suction effect of the upper magnetic disk. In this position, the lower magnetic disk assembly is at a greater distance from the cup bottom, effectively preventing friction between the lower magnetic disk assembly and the cup bottom. The detachable pulverizing device, located inside the cup bottom, is also subject to the magnetic attraction of the lower magnetic disk assembly. Therefore, when the cup body and pulverizing device are installed on the machine base, the lower magnetic disk assembly can also attract the pulverizing device to the inside of the cup bottom, preventing the pulverizing device from jumping within the cup body, thereby ensuring better pulverization of the pulverized parts.

[0032] 7. 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 the lower disk assembly and the cup bottom. Therefore, the limiting structure can be directly provided on the lower disk assembly or the cup bottom. For example, a protrusion is provided on the bottom of the cup bottom, protruding toward the lower disk assembly, or a protrusion is provided on the lower disk assembly, protruding toward the cup bottom. When the lower disk assembly reaches the second position, the protrusion provided on the lower disk assembly or the cup bottom abuts against the cup bottom or the lower disk assembly, so that there is a gap between the main power-driven rotating part of the lower disk assembly and the cup bottom, thereby avoiding direct friction between the main part of the lower disk assembly and the cup bottom. It should be noted that, since the protrusion is directly protruded from the lower disk assembly or the cup bottom, the protrusion will have relative friction during contact operation. For example, the protrusion provided on the lower disk assembly will have relative friction with the cup bottom when the lower disk assembly rotates. Therefore, on the one hand, the protrusion is provided at the rotation center of the lower disk assembly, and on the other hand, the radius of the protrusion must be reduced to reduce the rotational linear velocity of the protrusion and reduce the friction force on the protrusion.

[0033] 8. A limiting structure is used to define the gap between the lower disk assembly and the cup bottom, minimizing the distance between them while ensuring they do not contact each other. The limiting structure is also intended to maintain a controllable minimum distance between the lower disk assembly and the upper disk while ensuring normal operation. Therefore, the distance L between the lower disk assembly and the cup bottom is set to ≤ 2 mm. This arrangement minimizes the distance between the lower disk assembly and the cup bottom. Given the fixed thickness of the cup bottom and the position of the pulverizing device and the cup bottom, the distance between the lower disk assembly and the upper disk is kept sufficiently small. This ensures sufficient torque transmission between the lower disk assembly and the upper disk, ensuring efficient power transmission between the motor and the pulverizer. Setting the distance L ≤ 2 mm also prevents direct contact and friction between the upper surface of the lower disk assembly and the cup bottom, ensuring stable operation of the lower disk assembly.

[0034] 9. The lower magnetic disk assembly is provided with a stopper hole, and the lower magnetic disk assembly is axially movable along the stopper hole to switch between a first position and a second position. When the cup body and the pulverizing device are installed, the lower magnetic disk assembly can be switched from the first position to the second position due to the suction effect of the pulverizing device. When the food processor is stopped and the cup body and pulverizing device are removed, the lower magnetic disk assembly can quickly return from the second position to the first position under its own weight. This process, relying solely on the up and down position switching of the lower magnetic disk assembly, satisfies the requirement of utilizing displacement to change the product dimensional tolerance chain. In actual operation, the lower magnetic disk assembly includes axial position switching and circumferential rotational movement. When the cup body and pulverizing device are installed and the food processor is in a non-operating state, the lower magnetic disk assembly is sucked upward and switched to the second position. When the food processor is in operation, the motor drives the lower magnetic disk assembly to rotate, and the lower magnetic disk assembly is already and always in the second position. In other words, the lower disk assembly's axial movement and circumferential rotational motions do not occur simultaneously, ensuring stable operation in all movement states. Even if the cup is accidentally lifted during operation, the food processor's inherent safety features will immediately disconnect the motor's power supply, causing the motor to stop operating. The lower disk assembly will also be able to reset itself promptly after the motor stops.

[0035] 10. Preferably, the lower disk assembly is fixedly connected to the motor. Furthermore, the motor is movably mounted on the base, and the motor and the lower disk assembly are integrally switched between the first position and the second position. Generally speaking, due to working requirements, the motor itself is processed with high precision to ensure that the motor can work stably and reliably. The lower disk assembly is then fixedly mounted on the motor, and the precision between the lower disk assembly and the motor can also be guaranteed. Thus, the motor and the lower disk assembly form a high-precision integral component, which is movably mounted in the base and switched between the first position and the second position. This ensures that the distance between the lower disk assembly and the upper disk is controllable, and also ensures the stability and reliability of the relationship between the motor and the lower disk assembly.

[0036] 11. An elastic member is further provided to push the lower disk assembly back from the second position to the first position. When the cup and pulverizing device are removed, the lower disk assembly can be moved from the second position to the first position under the push of the elastic member. Although the lower disk assembly can minimize the distance between the lower disk assembly and the upper disk in the second position, the food processor does not only require the pulverizing device to operate. For example, the food processor may not be equipped with the pulverizing device and may rely solely on the heating function of the cup to achieve heating and cooking. Alternatively, the food processor may also switch between different cups and different pulverizing devices. During installation of different cups, the lower disk assembly will adopt different second positions when moved upward from the first position. If the lower disk assembly is not reset, interference between the lower disk assembly and the cup may occur when different functions and different cups are used, thereby affecting the normal and reliable operation of the lower disk assembly and the cup.

[0037] 12. A sink is formed on the outside of the cup bottom. The sink forms a top surface on the outside of the cup bottom that cooperates with the lower disk assembly. The area of ​​this top surface is smaller than that of the cup body, so that the top surface can have a better flatness to cooperate with the lower disk assembly. The edge of the sink can also increase the strength of the bottom of the cup body to further prevent the top surface of the sink from deforming and affecting the distance between the lower disk assembly and the upper disk. The lower disk assembly is arranged to extend into the sink, and the limiting structure is located between the top surface of the sink and the lower disk assembly. This ensures the distance between the lower disk assembly and the upper disk, and can also appropriately limit the lower disk assembly to ensure that the lower disk assembly can always maintain the optimal alignment position with the upper disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the overall structure of a first embodiment of a food processing machine with reliable transmission according to the present invention.

[0039] Figure 2 This is a schematic diagram of the exploded structure of the upper and lower disk components of the first embodiment of the food processing machine with reliable transmission according to the present invention.

[0040] 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.

[0041] Figure 4A This is a schematic diagram of the disk assembly in the first position of the first embodiment of the food processing machine with reliable transmission according to the present invention.

[0042] Figure 4B This is a schematic diagram of the disk assembly in the second position of the first embodiment of the food processing machine with reliable transmission according to the present invention.

[0043] Figure 5 for Figure 4B A partial enlarged schematic diagram of the middle A.

[0044] Figure 6 This is a diagram showing the distance and magnetic attraction distribution between the upper and lower magnetic disk assemblies of the food processing machine with reliable transmission according to the present invention.

[0045] Figure 7 This is a schematic diagram of the machine base structure of the second embodiment of the food processing machine with reliable transmission described in the present utility model.

[0046] The corresponding names in the figure are as follows:

[0047] 100. Base; 101. Upper housing; 102. Lower housing; 103. Motor screw; 110. Cup body; 111. Cup bottom; 112. Sink; 113. Sink; 120. Locating ring; 121. Locating slot; 2. Motor; 21. Motor shaft; 211. Limiting column; 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; 4. Crushing device; 41. Upper magnetic disk; 42. Upper magnet; 43. Fixed shell; 431. Shell bottom; 432. Fixed cavity; 434. Upper bearing; 435. Shaft seal; 44. Knife shaft; 45. Crushing part; 5. Limiting structure; 51. Bearing; 511. Outer ring; 512. Ball; 513. Inner ring; 52. Abutment part. DETAILED DESCRIPTION

[0048] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0049] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0050] In addition, in the description of this application, it should be understood that the terms "center," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific position, be constructed, or operate in a specific position. Therefore, they should not be construed as limitations on this invention. Terms such as "upstream" and "downstream" are based on positional relationships during normal fluid flow.

[0051] Furthermore, the terms "first," "second," and the like 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 being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0052] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0053] In this application, unless otherwise expressly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0054] Food processors such as wall breakers, food processors, and soymilk makers usually rely on motors to drive the rotation of the crushing parts, which will collide and cut the ingredients placed in the cup body to complete the crushing of the ingredients. During the crushing process of current wall breakers, the rotation of the motor usually exceeds 10,000 rpm. During the collision and cutting process of the crushing parts with the ingredients, non-continuous and random impacts are formed between the ingredients and the crushing parts, and the crushing parts will generate vibration and noise. Such vibration will be transmitted back to the motor and the base, which will cause the motor and the base to generate more serious vibration and noise during operation. As a technological leader in food processing products in this field, the applicant is constantly exploring to find solutions to the problems of motor vibration and noise.

[0055] As mentioned above, the applicant proposed in the early days to use a non-contact transmission method to realize the power transmission between the motor and the crushing parts, so as to cut off the mechanical connection between the motor and the crushing parts and avoid the vibration and impact of the crushing parts from reacting to the motor. Specifically, it includes an upper coupling and a lower coupling. The upper and lower couplings can be set as permanent magnets at the same time, or one of the upper and lower couplings can be set as a permanent magnet and the other as a magnetic metal disk. However, such a non-contact transmission scheme still has many technical problems. According to Coulomb's law, the interaction force between the two magnets F = k×(m1×m2) / r 2 , where 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 from the above, to ensure the interaction force between the upper and lower couplings of the two permanent magnets without contact, the magnetic charges of the two permanent magnets can be increased, or the distance between the two magnets can be reduced. Since the interaction force is inversely proportional to the square of the distance between the two magnets, the interaction force between the two decreases rapidly as the distance increases.

[0056] As can be seen from the above, although the non-contact transmission solution can completely isolate the vibration transmission between the motor and the crushing tool, it was found in the application practice of the applicant's product that the non-contact transmission solution will have the following technical problems: the non-contact upper coupling and the lower coupling rely on the magnetic interaction force between the two to achieve power transmission, and the magnetic interaction force between the upper coupling and the lower coupling is limited by the distance between the two. When the distance between the two becomes larger, the interaction force between the two drops rapidly. In existing soymilk machines or wall-breaking machines, the machine base and the cup body are assembled from different accessories. Each accessory itself has production tolerances during the production process. During the assembly process, multiple accessories will superimpose the tolerances into a dimensional tolerance chain, resulting in a large tolerance range for the finished product. Taking the machine base as an example, the cup body is placed on the casing, and the power transmission between the machine base and the cup body is connected through the lower coupling and the upper coupling. The lower coupling is connected to the motor shaft, which is then mounted on the housing's fixed column via a motor bracket. A shock-absorbing pad is clamped between the motor bracket and the fixed column, and the motor bracket is then locked to the fixed column using screws. Therefore, from the top cup mating surface of the housing to the lower coupling and upper coupling, the tolerances of multiple accessories and multiple assembly structures are superimposed. When the top of the housing is used as the reference plane, the lower coupling has a large axial tolerance range. This tolerance range results in poor stability in the distance between the upper and lower disk assemblies. Furthermore, the cup's own dimensional chain tolerance is added, and the distance between the upper and lower disk assemblies varies significantly for different products. For permanent magnets with the same magnetic charge, the increase in position will cause the mutual force to decay rapidly, thereby affecting the normal operation of the upper disk and the crushing component.

[0057] Furthermore, when different cups are combined with different bases, there will be positional deviations between them. Furthermore, when different users remove or install the cup, the placement of the cup may vary. After long-term use, wear and tear on the product itself can further increase the dimensional error between the cup and base. These factors, combined, can lead to positional uncertainty between the upper and lower disk assemblies, which in turn affects the proper functioning of the upper disk and the crushing unit.

[0058] When the traditional upper and lower couplings of an existing food processor are directly replaced with upper and lower couplings with permanent magnets, the existing fixed structure usually fixes the distance between the upper and lower couplings. Therefore, the interaction force between the upper and lower couplings is generally increased by increasing the magnetic charge strength of the two permanent magnets. However, when the spatial structure limit of the existing food processor is reached, the interaction force can no longer be increased simply by increasing the magnetic charge strength of the permanent magnets. Therefore, how to reduce the distance between the upper and lower couplings becomes the main technical direction.

[0059] However, existing food processors, such as blenders, have multiple mounting components between the upper and lower couplings. The varying dimensional tolerances and dimensional chains of these components can cause variations in the distance between the upper and lower couplings. Similar to increasing magnetic charge, when the preset dimensions between the upper and lower couplings reach their limits, the product's inherent dimensional tolerances can significantly impact the interaction force between them. In particular, when the bottom of the cup is sealed and the upper coupling with a permanent magnet and the crushing element are removably mounted within the cup, the upper and lower couplings become increasingly uncontrollable, significantly impacting the reliability of the distance between them and causing the interaction force to be highly unstable. For example, when a user operates a food processor, it's not always possible to ensure the cup is positioned optimally on the base. Furthermore, wear and tear of the various components over extended use can affect the fit between the cup and base, and thus the distance between the upper and lower couplings.

[0060] Based on the above technical problems, the non-contact transmission technology using permanent magnets has not been fully applied in products. Although the applicant has further optimized the transmission methods of the existing contact upper coupling and lower coupling, for example, the applicant disclosed a low-noise wall breaker in Chinese invention patent CN202410217067.4, which absorbs the shaking of the cup body assembly and reduces vibration and noise by setting the cup body assembly relative to the motor. In addition, the applicant disclosed a food processing machine with stable transmission in Chinese utility model patent CN202320044237.4, which adds an elastic pad between the upper coupling and the lower coupling to reduce the crushing impact in the cup body from being transmitted to the lower coupling through the upper coupling. However, this technical solution still has some shortcomings: on the one hand, such transmission is still a direct contact mechanical transmission. No matter how the shock-absorbing pad structure is set, the impact of crushing food in the cup body will be transmitted to the lower coupling through the upper coupling. On the other hand, whether the cup body floats or the motor floats, or the two are set to float relative to each other, it is only to weaken the vibration between the two. Since the positions of the two are uncertain in the floating state, that is, during the operation, the upper coupling and the lower coupling constantly change their matching position in the axial direction, which will increase the impact between the upper coupling and the lower coupling. Furthermore, as mentioned above, the scheme of contact transmission using magnetism will directly transmit vibration and noise between the two, and will also accelerate the wear of the magnetic drive and magnetic transmission parts due to friction when there is a speed difference between the magnetic drive and magnetic transmission parts.

[0061] In the existing technology, whether it is non-contact magnetic transmission or contact mechanical transmission, the proposed solution is to adopt a "floating" matching structure, using the floating space to alleviate the impact generated by the absorption component. In other words, the existing technology provides easy-to-think solutions on how to use the floating space and the relative position changes during operation to solve the vibration transmission between the upper coupling and the lower coupling. However, from the above analysis, it can be seen that the floating setting method cannot truly improve the vibration and noise of the product. At the same time, the floating setting method will also cause the distance between the upper and lower disk assemblies to change, thereby affecting the interaction force between the upper and lower disk assemblies.

[0062] Based on this, the applicant breaks the existing conventional scheme of simple floating installation on the basis of non-contact transmission scheme. First, the cup body is detachably installed on the machine base, and the crushing device including the upper magnetic disk is arranged on the inner side of the cup bottom of the cup body to ensure that the distance from the upper magnetic disk to the cup bottom is in a controllable position; for the lower magnetic disk assembly, a variable position setting method is adopted, wherein the clamping limit structure between the lower magnetic disk assembly in the second position and the cup bottom is used to have a gap. In this way, the lower magnetic disk assembly and the upper magnetic disk are both positioned by relying on the cup bottom, and the distance between the lower magnetic disk assembly and the upper magnetic disk is no longer affected by factors such as the assembly of the cup body and the machine base and user installation. The distance between the lower magnetic disk assembly and the upper magnetic disk can be stably and reliably controlled at a controllable optimal value to fully ensure the power transmission between the lower magnetic disk assembly and the upper magnetic disk. The first position is the natural position of the lower disk assembly when installed on the machine base. This position, when unaffected by external forces such as the upper disk, is determined by the lower disk assembly's own weight and the weight of the motor connected to it. In the first position, the lower disk assembly is positioned relatively far from the cup bottom due to design dimensions and assembly dimensional chains. When the cup body and the crushing device within the cup body are installed, the upper disk assembly adheres to the inner bottom of the cup body and pulls the lower disk assembly upward to a second position close to the outer side of the cup bottom. Due to the suction of the upper disk, the lower disk assembly remains in the second position during operation, ensuring a secure fit with the upper disk and maintaining a safe distance between the upper and lower disk assemblies. Furthermore, the lower and upper disk assemblies remain fixed during operation, preventing torque fluctuations caused by a "floating" design that could cause vibration and noise in the upper and lower disk assemblies. A retaining structure is clamped between the lower magnetic disk assembly and the cup base, ensuring a sufficiently close distance between them without direct contact. This ensures magnetic interaction between the lower magnetic disk assembly and the upper magnetic disk while preventing direct friction between them. The retaining structure, located at the rotational center of the lower magnetic disk assembly, has a relatively small radius and a relatively low linear velocity during high-speed rotation. Even if the retaining structure rotates relative to the lower magnetic disk assembly or the cup base, it can withstand relative friction between them within a predetermined range, thereby ensuring a close yet friction-free structural fit between the lower magnetic disk assembly and the cup base. Thus, the present invention utilizes the configuration of the lower magnetic disk assembly to address various dimensional variations in food processing machines, such as component tolerances, product assembly tolerance dimensional chains, product assembly deviations, user usage deviations, and product wear deviations, while achieving non-contact transmission. Furthermore, the retaining structure prevents direct contact and friction between the lower magnetic disk assembly and the cup base.

[0063] Based on the stable and reliable mounting of the pulverizing device, particularly the upper magnetic disk, on the bottom of the cup body, and in order to address the technical issues of the unstable and reliable distance between the upper and lower magnetic disk assemblies, as well as the relative friction caused by direct adsorption between the magnetic drive components, caused by factors such as product assembly tolerances, errors caused by user operating habits, errors caused by different cup body and base combinations, and wear during normal use of the food processor when using non-contact transmission in existing food processors, the present application provides a food processor with reliable transmission. The food processor includes a base, a cup body, and a pulverizing device. The base is provided with a motor and a lower magnetic disk assembly driven by the motor. The cup body is detachably mounted to the base, and the cup body is provided with a pulverizing device mounted on the inner side of the cup bottom. The pulverizing device can be fixedly mounted on the cup bottom or detachably disposed within the cup bottom, allowing 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, facilitating cleaning of the cup body and pulverizing device. Preferably, because the food processor utilizes a non-contact transmission method, the cup bottom completely seals the bottom of the cup body, eliminating the need for a through-hole at the bottom of the cup body that communicates with the outside. This improves the sealing effect of the cup body, preventing leakage during operation and preventing liquid from entering the cup body during cleaning. For example, the sidewalls of the cup body are integrally formed with the cup bottom, or the cup bottom is a closed, one-piece structure fixedly connected to the sidewalls of the cup body. The pulverizing device includes a pulverizing element and an upper magnetic disk. The upper magnetic disk attracts the lower magnetic disk assembly and, driven by the lower magnetic disk assembly, drives the pulverizing element to achieve pulverization. Preferably, the food processor is also equipped with a heating device. When the pulverizing device is in place, the pulverizing device performs the pulverizing function, while the heating device performs the boiling function. When the pulverizing device is not in place, only the heating device heats and boils the food in the cup body, for example, only for boiling water.

[0064] The lower magnetic disk assembly has a first position and a second position. Preferably, for the technical solution in which the crushing device and the cup body are detachably mounted, when the crushing device is not mounted, the lower magnetic disk assembly is in the first position, regardless of whether the cup body is mounted. This arrangement has the advantage that if the crushing device's processing function is not required, for example, if only the heating function is required, the crushing device can be omitted. In this case, the lower magnetic disk assembly does not need to transmit power to the upper magnetic disk, and neither the motor nor the lower magnetic disk assembly needs to operate, so the lower magnetic disk assembly does not need to move from the first position to the second position. When the cup body and crushing device are mounted, the upper magnetic disk and the lower magnetic disk assembly are attracted to each other. Since the upper magnetic disk is relatively fixed in the cup body, it attracts the lower magnetic disk assembly upward, overcoming its own weight and attracting it to the second position where it is in contact with the outer side of the cup bottom. This action is instantaneous. That is, the user only needs to place the cup body and crushing device on the machine base, and the upper magnetic disk immediately attracts the lower magnetic disk assembly to the second position. During operation of the food processor, the lower magnetic disk assembly can remain in the second position. By switching from the first position to the second position, the assembly tolerance of the machine base, the assembly tolerance of the cup body, the fitting error between the cup body and the machine base, and the dimensional chain caused by the wear error of the product are all resolved within the switching distance between the first position and the second position. This ensures that when the cup body and the crushing device are installed on the machine base, the upper magnetic disk and the lower magnetic disk assembly can reach the preset optimal position.

[0065] Although the distance variation caused by factors such as component tolerances, product assembly tolerance chains, product assembly deviations, user usage deviations, assembly errors between different cup bodies and machine bases, and product wear in the food processor can be addressed by switching the lower magnetic disk assembly from a first position to a second position, when the lower magnetic disk assembly reaches the second position and is completely in contact with the bottom of the cup body, friction between the lower magnetic disk assembly and the cup bottom may occur during operation. Due to the high-speed rotation of the lower magnetic disk assembly, such friction can significantly affect the proper fit between the lower magnetic disk assembly and the cup bottom. Therefore, the present application further provides a limiting structure, which is disposed at the rotation center of the lower magnetic disk assembly. The limiting structure is clamped between the lower magnetic disk assembly and the cup bottom, ensuring that the lower magnetic disk assembly and the cup bottom are sufficiently close but not in direct contact. While ensuring the magnetic interaction between the lower magnetic disk assembly and the upper magnetic disk, the limiting structure is used to withstand the relative rotation between the lower magnetic disk assembly and the cup bottom, avoiding direct friction between the lower magnetic disk assembly and the cup bottom. The limiting structure located at the rotation center of the lower disk assembly has a relatively small linear velocity during high-speed rotation under the premise of a relatively small radius. Even if the limiting structure rotates relative to the lower disk assembly or the cup bottom, the limiting structure can withstand the relative friction between the two within a preset range, thereby ensuring that the lower disk assembly and the cup bottom are close in distance but friction-free.

[0066] It should be noted that the fact that the limiting structure is in contact with the lower disk assembly and the cup bottom at the same time when it is in the second position does not exclude the fact that the limiting structure is not in contact with the lower disk assembly and the cup bottom at the same time when it is in the first position. As mentioned above, the limiting structure may include two parts, which are respectively arranged on the lower disk assembly and the cup bottom. Furthermore, for example, the limiting structure is arranged on the lower disk assembly, and the limiting structure has an elastic member to drive the limiting structure to contact with the lower disk assembly and the cup bottom at the same time regardless of whether it is in the first position or the second position. In this case, the limiting structure in the first position does not need to withstand the magnetic force between the lower disk assembly and the upper disk. Such a simple transformation does not exceed the scope of protection required by this application.

[0067] Specifically, such as Figure 1-Figure 7As shown, the present application provides a food processing machine with reliable transmission, which includes a machine base 100 and a cup body 110. The machine base 100 is provided with a motor 2 and a lower magnetic disk assembly 3 driven by the motor 2. The cup body 110 is detachably mounted on the machine base 100. Preferably, a support table is provided at the upper end of the machine base 100, and the cup body 110 is placed on the support table. The motor 2 is arranged in the machine base 100, and the lower magnetic disk assembly 3 extends out of the machine base 100 and is located on the support table. The cup body 110 is provided with a crushing device 4. The crushing device 4 is installed in the cup body 110 and is located on the inner side of the bottom of the cup body 110. The crushing device 4 includes a crushing element 45 and an upper magnetic disk 41. The upper magnetic disk 41 and the lower magnetic disk assembly 3 both include permanent magnets, so that the upper magnetic disk 41 and the lower magnetic disk assembly 3 attract each other and transmit power. When the lower magnetic disk assembly 3 is driven by the motor 2, the lower magnetic disk assembly 3 drives the upper magnetic disk 41 to be placed and ultimately drives the crushing element 45 to cut and crush the food placed in the cup body or stir the food in the cup body. Preferably, a positioning platform and positioning groove that cooperate with each other are provided between the cup body and the machine base. When the cup body is installed on the machine base, the positioning platform and positioning groove cooperate with each other to ensure that the lower magnetic disk assembly and the crushing device remain concentric, and in particular, maintain the concentricity between the lower magnetic disk assembly and the upper magnetic disk, so that when the motor drives the lower magnetic disk assembly to rotate, the upper magnetic disk can be better driven.

[0068] The lower disk assembly 3 has a first position and a second position. When the crushing device 4 is not placed, the lower disk assembly 3 is in a normal installation position, that is, the natural position of the lower disk assembly 3 due to the support of the base 100 and the gravity of the lower disk assembly 3. When the cup body 110 and the crushing device 4 are placed, the lower disk assembly 3 is attracted by the upper disk 41. At this time, the magnetic attraction between the upper disk 41 and the lower disk assembly 3 overcomes the gravity of the lower disk assembly 3, thereby attracting the lower disk assembly 3 upward and reaching the second position close to the outer bottom surface of the cup body 110. In particular, when the cup body 110 is placed on the base 100 but the crushing device 4 is not placed, the lower disk assembly 3 will not rise to the second position due to the lack of the attraction of the upper disk 41.

[0069] The food processor also includes a limiting structure 5. Preferably, the limiting structure 5 is mounted at the rotation center of the lower magnetic disk assembly 3. Alternatively, the limiting structure 5 can be mounted on the cup bottom, corresponding to the rotation center of the lower magnetic disk assembly 3. Alternatively, the limiting structure 5 can comprise two parts, disposed simultaneously on the cup bottom and the lower magnetic disk assembly, and the combined structure can be positioned at the rotation center of the lower magnetic disk assembly 3. When the cup body 110 is mounted on the machine base 100 and the crushing device 4 is installed within the cup body 110, the upper magnetic disk 41 sucks the upper suction cup assembly 3 upward to the second position. At this point, the limiting structure 5 is clamped between the cup bottom and the lower magnetic disk assembly 3. The height of the limiting structure 5 protruding from the upper end surface of the lower magnetic disk assembly 3 defines the gap between the lower magnetic disk assembly 3 and the cup bottom. This ensures that the lower magnetic disk assembly and the cup bottom are close yet non-contacting.

[0070] As shown in the figure, the food processor comprises a base and a cup body. The base typically includes a housing, with a mounting platform on top of the housing for the cup body. The motor is mounted within the housing, with mounting and fixing structures between the motor and the housing. The motor also includes a stator, a rotor, and a motor shaft. The lower disk assembly is mounted on the motor shaft. The lower disk assembly, along with the motor, typically passes through the housing and is located on the mounting platform to mate with the upper disk of the cup body. The various components of the base have inherent production tolerances, as do the corresponding mounting structures. From the housing's mounting platform to the lower disk assembly, there are multiple component and mating tolerances. The combined dimensional chain of these tolerances results in significant dimensional variations between the mounting platform and the lower disk assembly for different products. Furthermore, the cup body also comprises multiple components, including the cup body, a knife holder, and a cup base. When assembled with the knife holder, cup base, and other components, the cup body also experiences overlapping dimensional chains, resulting in significant dimensional variations between the upper disk and the cup base. Simply put, the dimensions between the upper and lower magnetic disk assemblies include: the distance from the upper magnetic disk to the cup bottom, the thickness of the cup bottom itself, and the distance from the cup bottom to the lower magnetic disk assembly. According to Coulomb's law, the interaction force between two magnets is inversely proportional to the square of the distance. Specifically for food processors, even a change of more than 1mm in the distance between the upper and lower magnetic disk assemblies can have a significant impact. Therefore, optimizing and reducing the distance between the upper and lower magnetic disk assemblies is a primary concern. Existing techniques typically rely on floating the upper magnetic disk, which reduces the distance between the upper and lower magnetic disk assemblies during operation and also allows for floating adjustment of the gap to address the issue of blade jamming in the agitator. However, existing techniques harbor a misconception: the agitator's inability to complete pulverization and blade jamming is precisely due to insufficient interaction between the upper and lower magnetic disk assemblies. Instead, reducing the distance between the upper and lower magnetic disk assemblies to increase interaction force and provide the pulverizer with sufficient power for pulverization. The purpose of the motor floating setting in the existing technology is only to prevent the vibration impact of the crushing parts from being directly transmitted to the motor through the upper coupling and the lower coupling. Due to the direct transmission between the upper coupling and the lower coupling, there will be no problem of attenuation of the interaction force, but the floating setting will cause impact between the upper coupling and the lower coupling due to the change in axial position.

[0071] In general, the floating setting is not suitable for magnetic non-contact power transmission. Therefore, the present application breaks this technical prejudice, sets the lower magnetic disk assembly to have a first position and a second position, and uses the limiting structure to limit the second position that the lower magnetic disk assembly can reach. First, the present application places the pulverizing device detachably on the inner side of the cup bottom of the cup body, and the pulverizing device is completely in contact with the cup bottom throughout the process, that is, the distance between the upper magnetic disk and the cup bottom is compressed to a minimum, and the upper magnetic disk is directly placed on the cup bottom, so it will not be affected by the dimensional chain error caused by the assembly of the cup body. The thickness of the cup body itself depends on the functional requirements of the product. For example, when the cup bottom is set to metal and has a heating function, the thickness of the cup bottom is the thickness of the metal bottom, and such a thickness is easier to control. As mentioned above, what can be further controlled is the size from the lower magnetic disk assembly to the outside of the cup bottom. The suction force of the upper disk assembly during installation is used to attract the lower disk assembly to the second position. The displacement difference between the first and second positions is used to absorb dimensional deviations caused by multiple factors, including assembly tolerances of the cup body, assembly tolerances of the base, assembly tolerances of the cup body and base, user errors in cup and base installation, and wear and tear from prolonged use. This ensures that the distance between the upper and lower disk assemblies is sufficiently small, thereby ensuring that the interaction force between them meets the preset torque requirement, making the food processor transmission more stable and reliable. Furthermore, because the lower disk assembly reaches the second position when the upper disk is installed and remains in this position throughout operation, it does not float during operation. This prevents insufficient interaction force between the upper and lower disk assemblies due to distance changes during operation, ensuring strong cutting and crushing power. Furthermore, a limiting structure is used to prevent the lower disk assembly from directly contacting the cup bottom, preventing friction with the cup bottom during operation that could affect its normal operation. In this way, the lower magnetic disk assembly that reaches the second position can be stably and reliably in the optimal transmission distance during operation without being affected by the vibration of the food processor itself, different cup and base assemblies, user operations, etc., thereby achieving the optimal coordination between the lower magnetic disk assembly and the upper magnetic disk, which is close but does not affect the operation.

[0072] As a specific embodiment of the food processing machine with reliable transmission described in the utility model, Figure 1-6As shown, the food processor includes a machine base 100 and a cup body 110, and the cup body 110 is placed on the machine base 100. A motor 2 and a lower magnetic disk assembly 3 are provided in the machine base 100, and the lower magnetic disk assembly 3 is provided at the upper end of the motor shaft 21 of the motor 2. A positioning platform and a positioning groove that cooperate with each other are provided between the machine base 100 and the cup body 110 to achieve stable cooperation between the machine base 100 and the cup body 110. At the same time, the positioning platform and the positioning groove can limit the concentricity between the lower magnetic disk assembly and the crushing device. Preferably, a positioning ring 120 is provided on the upper end face of the machine base 100, and the positioning ring 120 spatially surrounds the outer periphery of the lower magnetic disk assembly 3. A positioning groove 121 is provided at the bottom of the cup body 110, and a sink 113 is also 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. At the same time, the lower disk assembly 3 is inserted into the sink 113 so that the lower disk assembly 3 is close to the bottom of the cup body 110. By virtue of the cooperation between the positioning ring and the positioning groove, and the cooperation between the lower disk assembly and the sink, the lower disk assembly can be properly close to the cup body. Here, the axial height of the lower disk assembly can be higher than that of the positioning ring; or, the axial height of the lower disk assembly is the same as that of the positioning ring; furthermore, the axial height of the lower disk assembly is lower than that of the positioning ring, so that the positioning ring can properly protect the lower disk assembly.

[0073] The cup body 110 is equipped with a detachable crushing device 4 mounted on the inner side of the cup bottom. The cup body 110 includes a main body and a cup bottom 111. The cup bottom 111 is sealed to the main body, forming a container structure with a completely closed bottom. Compared with the existing technology, the cup bottom does not have a mechanical through hole, which eliminates the risk of water leakage. The closed cup structure also facilitates cleaning inside and outside the cup. The upper end of the lower disk assembly 3 is also provided with a limiting structure 5. The limiting structure 5 is mounted at the rotation center of the lower disk assembly 3 and is located between the lower disk assembly 3 and the cup bottom of the cup body 110.

[0074] Preferably, the lower disk assembly 3 includes a lower disk body 31, the lower disk body 31 is provided with a limiting hole 311, and the upper end of the motor shaft 21 is provided with a limiting post 211, and the limiting post 211 is inserted into the limiting hole 311. Furthermore, the top end of the limiting post 211 is provided with 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 a gap is formed 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. When the lower disk assembly 3 is in the first position, under the action of gravity and the push of the return spring 23, the bottom of the lower disk assembly 3 abuts against the upper step position of the motor shaft 21. When the upper magnetic disk 41 is installed in place, it attracts the lower magnetic disk assembly 3. The magnetic attraction between the upper magnetic disk 41 and the lower magnetic disk assembly 3 overcomes the gravity of the lower magnetic disk assembly 3 and the elastic force of the return spring 23, causing the lower magnetic disk assembly 3 to move upward to a second position close to the cup body 110. By utilizing the limiting holes and limiting posts, the lower magnetic disk assembly 3 can simultaneously move axially while the motor shaft drives the lower magnetic disk assembly to rotate, thereby facilitating the switching of the lower magnetic disk assembly 3 between the first position and the second position and ensuring stable and reliable power transmission between the motor shaft and the lower magnetic disk assembly. A return spring is further provided. Utilizing the elastic force of the return spring, when the pulverizing device is removed, the combined force of the gravity of the lower magnetic disk assembly and the elastic force of the return spring allows the lower magnetic disk assembly to quickly return to the first position.

[0075] An installation cavity 313 is provided on the top of the lower disk body 31, and a lower magnet 32 ​​made of a permanent magnet is provided in the installation cavity 313. The lower disk assembly 3 also includes a lower cover plate 33 that encloses the installation cavity 313. The lower disk body 31 and the lower cover plate 33 enclose the lower magnet 32 ​​inside to prevent the lower magnet 32 ​​from being corroded by external liquids, etc.

[0076] The rotation center of the lower disk assembly 3 is also provided with a mounting hole 312, and the limiting structure 5 includes a bearing 51 installed at the mounting hole 312. Preferably, the bearing 51 includes a first rotating part and a second rotating part, wherein the bearing 51 is fixed in the mounting hole 312 through the first rotating part, and when the lower disk assembly 3 is in the second position, the second rotating part contacts the bottom of the cup.

[0077] Preferably, the bearing is a ball bearing, deep groove ball bearing, planar thrust bearing, or the like, typically comprising inner and outer rings or upper and lower portions that rotate relative to each other. In this embodiment, the first rotating portion 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 portion is the inner ring 513 of the bearing 51, with balls 512 disposed between the outer and inner rings 511, 513. When the lower disk assembly 3 rotates, the outer ring 511 rotates with the lower disk assembly 3, while the inner ring 513 contacts and remains stationary with the cup bottom 111. The balls 512 are clamped between the outer and inner rings 511, 513, and rotate relative to each other, thereby achieving relative rotation between the lower disk assembly 3 and the cup bottom 111. Preferably, the second rotating portion 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 equipped with a heater. The bearing 51 is metal, and the abutment 52 is plastic, 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.

[0078] The mounting cavity 313 and the mounting hole 312 at least partially overlap in the lateral height of the lower disk assembly 3. As a result, the lower magnet 32 ​​disposed in the mounting cavity 313 surrounds the outer circumference of the bearing 51 mounted in the mounting hole 312. In the axial direction, when the lower disk assembly 3 is in the second position, the lower magnet 32 ​​is close to the cup bottom 111, and the distance between the lower magnet 32 ​​and the cup bottom 111 is controlled by the protruding height of the bearing 51. By encircling the lower magnet 32 ​​around the outer circumference of the bearing 51, the radius and circumference of the mounting cavity 313 are increased, allowing for the installation of more lower magnets. Furthermore, at the same height, the lower magnet 32 ​​exhibits a stronger magnetic flux, thereby enhancing the magnetic properties of the lower disk assembly 3.

[0079] The upper end of the abutment 52 protrudes from the upper end surface of the lower disk assembly 3, with a height difference D1 between the two. When the lower disk assembly 3 reaches the second position, the abutment 52 abuts against the outer surface of the cup bottom 111 of the cup body 110. When the lower disk assembly 3 is in operation, the abutment 52 and the cup bottom 111 are closely aligned, 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 to be sufficiently small. Preferably, L is ≤ 2mm, meaning that the upper end surface of the lower disk assembly is close to but does not contact the outer surface of the cup bottom. This ensures a sufficiently close distance between the lower disk assembly and the upper disk while also preventing friction between the lower disk assembly and the cup bottom. The coordination between the bearing and the abutment ensures that the lower disk assembly will not vibrate or make noise even when rotating at high speeds. Furthermore, the bearing and abutment member are positioned at the rotational center of the lower magnetic disk assembly. The outer diameter of the abutment member need not be excessively large, thereby providing a push-pull effect and reducing the linear velocity of the abutment member's rotation, thereby making the food processor's transmission more stable and reliable. Preferably, the height difference D1 of the abutment member 52 protruding from the upper end surface of the lower magnetic disk assembly 3 is equal to the gap L between the cup bottom 111 and the upper end surface of the lower magnetic disk assembly 3. Of course, the height difference D1 can also be greater than the gap L. This is because the protruding portion of the abutment member 52 forms a gap between the lower magnetic disk assembly and the cup bottom. When the lower magnetic disk assembly abuts the cup bottom due to the magnetic attraction of the upper magnetic disk, the abutment member 52 may be squeezed and deformed appropriately, thereby making the height difference D1 greater than the gap L. When the abutment member 52 is made of a metal or rigid plastic 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 member protruding from the lower disk assembly. Since the limit assembly is directly mounted on the upper end surface of the lower disk assembly, the mounting structure between the limit assembly and the lower disk assembly is simple, ensuring that D1 is within a controllable tolerance range. Furthermore, after the limit assembly is installed, it can be processed to ensure a higher precision of the height difference D1 between the limit assembly and the upper end surface of the lower disk assembly, thereby ensuring that the gap L is smaller within a controllable range.

[0080] like Figure 6 As shown, the relationship curve between the distance between the upper disk and the lower disk assembly and the corresponding magnetic attraction force is shown. Figure 6 It can be seen that when the distance between the upper and lower disk assemblies increases, the magnetic attraction between the upper and lower disk assemblies decreases rapidly, especially when the total distance between the upper and lower disk assemblies is less than 8 mm, the magnetic attraction between the upper and lower disk assemblies changes faster. It should be noted that Figure 6The distance between the upper disk and the lower disk assembly is the distance of direct contact when no other structures such as a cup body and a crushing device are provided (ie, Figure 6 The distance between the upper and lower magnetic disk assemblies along the central horizontal axis = the distance from the upper magnetic disk to the cup body + the thickness of the cup body itself + the gap L between the cup body and the lower magnetic disk assembly. In a food processor, since the lower magnetic disk assembly needs to be mounted on the motor and requires a fixed structure and a sealing structure to enclose the permanent magnet of the lower magnetic disk assembly, the crushing device needs to be placed inside the cup body to perform the crushing process. The upper magnetic disk and its permanent magnet also require a fixed structure and a sealing structure to prevent the upper magnet's permanent magnet from being directly exposed to the food in the cup body. There is also the thickness of the cup bottom itself between the upper and lower magnetic disk assemblies. Therefore, the actual distance between the upper and lower magnetic disk assemblies cannot start from zero. As previously mentioned, since the crushing device is placed directly inside the cup body, the distance between the upper magnetic disk and the cup bottom is fixed, and the thickness of the cup bottom itself is fixed. Therefore, the main factor affecting the distance between the magnetic disk assembly and the upper magnetic disk is the gap L between the cup bottom and the upper magnetic disk.

[0081] For the reasons stated above, it is preferred that the gap L be set to ≤ 2mm. Of course, due to the gap, the lower disk assembly and the cup base do not directly mate, meaning the gap L is necessarily greater than 0. Of course, the closer the gap between the lower disk assembly and the cup base approaches 0, the greater the magnetic interaction force between the lower disk assembly and the upper disk. As previously mentioned, the smaller the distance between the lower disk assembly and the cup base, the better. For example, the gap L can be set to 0.1mm, 0.2mm, 0.4mm, 0.5mm, etc. However, due to uncontrollable tolerances during product production, such as the flatness of the upper end surface of the lower disk assembly and the cup base itself, the gap L between the two 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 significantly affect the magnetic attraction between the lower disk assembly and the upper disk, failing to fully meet the required pulverizing torque of the pulverizing device.

[0082] Preferably, the pulverizing device 4 includes an upper magnetic disk 41 and a pulverizing element 45. The upper magnetic disk 41 is connected to the pulverizing element 45. When the upper magnetic disk 41 is driven by the lower magnetic disk assembly 3, the pulverizing element 45 rotates to achieve cutting and pulverizing. The pulverizing device 4 also includes a fixed housing 43 and a blade shaft 44. The fixed housing 43 defines a fixed cavity 432. The upper magnetic disk 41 includes an upper magnet 42 disposed within the fixed cavity 432. The bottom of the fixed housing 43 also includes a housing bottom 431 that seals the fixed cavity 432. The blade shaft 44 passes through the fixed housing 43. The upper magnetic disk 41 and the pulverizing element 45 are respectively fixed to opposite ends of the blade shaft 44. The fixed housing 43 also includes an upper bearing 434 and a shaft seal 435. The blade shaft 44 passes through the upper bearing 434 and the shaft seal 435, allowing the upper magnetic disk 41, blade shaft 44, and pulverizing element 45 to rotate relative to the fixed housing 43. At the same time, the shaft seal 435 prevents liquid in the cup from flowing into the fixed cavity 432. This arrangement prevents the upper magnetic disk 41 from contacting and rubbing against the housing bottom 431 during rotation. It also serves as a centering position at the bottom, preventing the crushing element from reacting on the upper magnetic disk when it is impacted and swung during operation, causing the upper magnetic disk to deflect, thereby ensuring stable and reliable operation of the upper magnetic disk. Furthermore, when the upper and lower magnetic disk assemblies are mutually attracted, a strong magnetic attraction is generated between them. For the lower magnetic disk assembly, the magnetic attraction is used to switch from the first position to the second position, and further, under the limiting action of the locking screw, abutment, etc., it remains in the optimal position for power transmission. However, the upper magnetic disk is also connected to the crushing element via the cutter shaft and passes through the upper bearing and shaft seal. When the upper magnetic disk is subjected to the magnetic attraction, the downward force is transmitted to the upper bearing and shaft seal. Over long periods of use, there is a risk of pulling the upper bearing downward, affecting the normal operation of the crushing device. A support structure can be provided to support the upper magnetic disk.

[0083] like Figure 4A 、 Figure 4B As shown, Figure 4A The figure shows that the pulverizing device 4 is not installed and the lower disk assembly 3 is in the first position. Figure 4B The figure shows that the crushing device 4 is installed in place, and the lower disk assembly 3 is attracted to the second position. Figure 4A As shown, in the first position, the lower disk assembly 3 is subjected to the interaction of its own gravity, the gravity of the motor, the installation structure of the base, the pushing force of the return spring, etc. At this time, the distance between the upper end surface of the lower disk assembly 3 and the top surface of the motor is D2. Figure 4BAs shown, in the second position, the lower disk assembly 3 is displaced upward by the magnetic attraction of the pulverizing device 4. At this time, the distance between the upper end surface of the lower disk assembly 3 and the top surface of the motor is D3. Preferably, D3 ≥ D2. The difference between D2 and D3, i.e., the upward displacement of the lower disk assembly, is also the error range of the food processor assembly dimensional tolerance chain that the lower disk assembly can absorb.

[0084] It should be noted that, while tolerances and assembly errors may exist among various components of a food processor, the food processor itself is relatively small. Therefore, when this error is ultimately fed back to the lower disk assembly, the tolerance displacement of the lower disk assembly typically does not exceed 2 mm. Consequently, the displacement between the first and second positions of the lower disk assembly typically does not exceed 2 mm. Of course, the lower disk assembly also has extreme assembly positions. When the cup body is fully installed, the lower disk assembly is already close to the outside of the cup bottom, resulting in no noticeable shift between the first and second positions. Consequently, distances D2 and D3 are identical.

[0085] Preferably, the outer side of the cup bottom 111 is provided with a recessed platform 112 recessed toward the interior of the cup body 110. When the cup bottom 111 is made of metal, the recessed platform 112 correspondingly forms a boss on the inner side of the cup bottom 111 that protrudes toward the interior of the cup body. The crushing device 4 is placed on the boss. Accordingly, 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 ensuring stable and reliable power transmission between the upper and lower disk assemblies. Furthermore, the localized placement of the boss on the cup bottom further enhances the strength of the cup bottom at the boss, thereby improving the flatness of the cup bottom at the boss and preventing deformation that would affect the gap between the upper and lower disk assemblies.

[0086] The food processor using the technical solution of the present application utilizes non-contact magnetic transmission, completely eliminating mechanical transmission between the pulverizing device and the motor. This prevents the vibration and impact of the pulverized components during operation from being transmitted to the motor, resulting in a more balanced and quieter operation, thus meeting the user's demand for low noise. Furthermore, by configuring the lower magnetic disk assembly to have a first position and a second position, the displacement difference between the first position and the second position is utilized to absorb dimensional errors caused by various factors, such as the assembly tolerance chain of the base and cup body of the food processor, operational errors during cup installation by the user, and wear errors during long-term use of the food processor. This allows the upper and lower magnetic disk assemblies to always maintain a preset minimum distance, ensuring that the interaction force between the upper and lower magnetic disk assemblies is within a preset range, thereby ensuring that the pulverized components can achieve stable and reliable cutting and pulverization. Furthermore, when the upper magnetic disk is installed in place, it adsorbs the lower magnetic disk assembly to the second position, and the lower magnetic 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 magnetic disk and the lower magnetic disk assembly does not change during operation and is always at a preset optimal distance, thereby ensuring stable and reliable power transmission of the food processor.

[0087] The lower disk assembly reaching the second position is limited by a limiting structure to prevent 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 dimension chains, it can be further processed after installation, making it easier to control the gap between the lower disk assembly and the cup bottom. It can more reliably compress the distance between the lower disk assembly and the upper disk, ensuring stable and reliable transmission between the lower disk assembly and the upper disk.

[0088] It should be noted that, in actual products, since the lower disk assembly rises to the second position dependent on the magnetic attraction of the upper disk, the cup body and pulverizing device must be installed before it can rise to the second position. This presents a challenge in determining whether the lower disk assembly has switched from the first to the second position. Alternatively, the upper end surface of the lower disk assembly can be painted. When only the cup body is installed on the machine base without the pulverizing device, the lower disk assembly will not switch from the first to the second position due to the lack of magnetic attraction from the upper disk, and the painted surface on the top of the lower disk assembly will not adhere to the cup bottom. After the pulverizing device is installed, the upper disk attracts the lower disk assembly to the second position, where it rests against the outside of the cup bottom. In particular, if a push member is provided, the painted surface on the top of the lower disk assembly will adhere to the outside of the cup bottom, thereby determining whether the lower disk assembly has moved from the first position to the second position, close to the cup bottom.

[0089] It can be understood that the limiting structure is arranged on the lower disk assembly, and the limiting structure includes a shell arranged outside the lower disk assembly. The lower disk assembly can rotate in the shell, and the shell abuts against the bottom of the cup. The lower disk assembly rotates and drives the upper disk to work.

[0090] It is understandable that the motor shaft may not be provided with a limit column, and the lower disk body may not be provided with a limit hole accordingly, but only with a through hole, and a locking screw is used to directly lock the top end of the motor shaft, 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.

[0091] It is understandable that the lower disk assembly may not be provided with a return spring, and the lower disk assembly may be returned from the second position to the first position solely by relying on the gravity of the lower disk assembly.

[0092] It can be understood that the crushing device is fixed to the inner side of the cup bottom. For example, a fixing column or a fixing hole is provided on the inner side of the cup bottom, and the crushing device is fixed to the inner side of the cup bottom through the fixing column or the fixing hole, wherein the upper magnetic disk and the crushing piece are rotatably arranged on the bottom of the cup.

[0093] It can be understood that the limiting structure only includes a bearing arranged in the mounting hole of the lower disk assembly, and the bearing includes an inner ring protruding from the upper end surface of the lower disk assembly. The outer ring of the bearing is fixedly connected to the lower disk body, and the inner ring is fitted with the outer side of the cup bottom, so that there is a gap between the lower disk assembly and the cup bottom.

[0094] It can be understood that the positioning platform includes a plurality of positioning posts arranged on the top of the machine base, and the centers of the plurality of positioning posts are concentric with the rotation center of the lower disk assembly; the bottom of the cup body is provided with an annular positioning groove that cooperates with the positioning posts, and the plurality of positioning posts are inserted into the annular positioning groove and limit the concentricity of the lower disk assembly and the crushing device; or, the bottom of the cup body is provided with a plurality of positioning grooves that cooperate with the plurality of positioning posts, and the plurality of positioning posts and the plurality of positioning grooves are plugged into and matched with each other to limit the concentricity between the lower disk assembly and the crushing device.

[0095] It can be understood that the positioning ring can be provided on the cup body, and the corresponding positioning groove is provided on the machine base.

[0096] As will be understood, the limiting structure includes a protrusion located at the rotational center of the upper end surface of the lower disk assembly. This protrusion extends upward, i.e., toward the cup bottom. When the lower disk assembly is in the second position, the protrusion abuts the outer side surface of the cup bottom, creating a gap between the upper end surface of the lower disk assembly and the cup bottom. When the lower disk assembly is in operation, the protrusion rotates with the lower disk assembly relative to the cup bottom. Because the protrusion is located at the rotational center of the lower disk assembly, it generally does not need to be excessively large. Therefore, the protrusion's rotational linear velocity is low, preventing excessive friction, thereby ensuring that power transmission is achieved while maintaining the gap between the lower disk assembly and the cup bottom.

[0097] It can be understood that the limiting structure includes a downward protrusion formed 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.

[0098] As can be understood, the limiting structure includes a bearing located on the cup bottom, corresponding to the rotational center of the lower disk assembly. The fixed portion of the bearing is connected to the cup bottom, and the rotating portion of the bearing is convex downward and abuts the lower disk assembly in the second position. The lower disk assembly rotates and drives the upper disk.

[0099] As another preferred embodiment of the present application, Figure 7 As shown, the lower disk assembly is fixedly connected to the motor, and the motor is movably installed on the machine base. When the crushing device is installed in place, the upper disk absorbs the lower disk assembly and drives the lower disk assembly and the motor to reach the second position to realize the driving of the upper disk.

[0100] Specifically, such as Figure 7As 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 and lower housings 101 and 102 utilize interlocking fixing posts and positioning holes to clamp the motor mounting bracket 24, thereby securing the motor 2 within the base 100. Preferably, the upper and lower housings 101 and 102 are secured by motor screws, and the motor 2 has axial movement space. When the pulverizing device is not positioned, the motor and lower disk assembly are restrained downward by gravity against the lower housing, supported by the lower housing, to maintain the lower disk assembly in a first position. When the pulverizing device is positioned, the upper disk attracts the lower disk assembly. The magnetic attraction between the upper and lower disk assemblies overcomes the gravity of the lower disk assembly and the motor, causing the lower disk assembly and the motor to move upward together to the second position. At this point, the motor presses upward against the upper housing and is restrained by the upper housing. During operation of the food processing machine, the lower disk assembly and the motor are maintained at the second position to maintain an optimal transmission distance between the lower disk assembly and the upper disk.

[0101] It is understandable that the motor can be directly mounted on the upper housing by screws or the like, and there is a movable space between the motor and the upper housing so that the motor and the lower disk assembly can be switched from the first position to the second position together.

[0102] It can be understood that the motor can be supported by the lower housing and have a movable space between the motor and the lower housing, so that the motor and the lower disk assembly can be switched from the first position to the second position together.

[0103] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. All equivalent changes and modifications made based on the present invention are covered by the scope of the claims of the present invention and will not be listed one by one here.

Claims

1. A food processing machine with stable transmission, characterized in that: The food processing machine comprises, A machine base is provided with a motor and a lower magnetic disk assembly driven by the motor; The cup body is detachably mounted on the machine base, and a crushing device is provided inside the cup body and mounted on the inner side of the cup bottom; A crushing device includes a crushing piece and an upper magnetic disk attracted to the lower magnetic disk assembly and driven by the lower magnetic disk assembly to drive the crushing piece to work; a limiting structure, disposed between the lower magnetic disk assembly and the cup bottom and located at the rotation center of the lower magnetic disk assembly; A lower disk assembly, comprising a disk body and a permanent magnet disposed on the disk body, wherein the lower disk assembly has a first position where no pulverizing device is placed and a second position where the pulverizing device is placed; wherein: The upper disk absorbs the lower disk assembly from the first position upward to the second position. The lower disk assembly and the cup bottom in the second position are in contact with the limiting structure at the same time. The limiting structure creates a gap between the lower disk assembly and the cup bottom.

2. The food processing machine with stable transmission as claimed in claim 1, characterized in that: The limiting structure includes a bearing, and the bearing 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 are in contact with the lower disk assembly and the cup bottom respectively, so that the lower disk assembly and the cup bottom rotate relative to each other through the bearing.

3. The food processing machine with stable transmission as claimed in claim 2, characterized in that: 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 surface of the lower disk assembly, and the second rotating part in the second position contacts the cup bottom.

4. The food processing machine with stable transmission as claimed in claim 3, characterized in that: The permanent magnets of the lower disk assembly surround the outer periphery of the bearing.

5. The food processing machine with stable transmission as claimed in claim 3, characterized in that: The second rotating portion includes an abutment member protruding from the upper end surface of the lower magnetic disk assembly.

6. The food processing machine with stable transmission as claimed in claim 1, characterized in that: The crushing device is detachable and arranged on the inner side of the cup bottom of the cup body.

7. The food processing machine with stable transmission as claimed in claim 1, characterized in that: The limiting structure includes a protrusion extending downward from the cup bottom, the protrusion being in contact with the lower disk assembly and rotating relative to the lower disk assembly; Alternatively, the limiting structure includes a protrusion extending upward from the upper magnetic disk, and the protrusion is in contact with the cup bottom and rotates relative to the cup bottom.

8. The food processing machine with stable transmission as claimed in claim 1, characterized in that: The gap L between the lower magnetic disk assembly and the cup bottom is ≤ 2 mm.

9. The food processing machine with stable transmission as claimed in claim 1, characterized in that: The lower disk assembly is provided with a limiting hole sleeved on the motor shaft, and the lower disk assembly can move along the axial direction of the limiting hole to switch between a first position and a second position.

10. The food processing machine with stable transmission as claimed in claim 1, characterized in that: The lower disk assembly is fixedly connected to the motor, and the motor is movably mounted on the base. The motor and the lower disk assembly are switched from a first position to a second position under the adsorption action of the upper disk.

11. The food processing machine with stable transmission according to claim 7 or 8, characterized in that: The base is further provided with an elastic member for pushing the lower disk assembly to switch from the second position to the first position.

12. The food processing machine with stable transmission as claimed in claim 1, characterized in that: A sinking platform recessed toward the interior of the cup body is provided on the outer side of the cup bottom, the lower magnetic disk assembly extends into the sinking platform, and the limiting structure is located between the sinking platform and the lower magnetic disk assembly.

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