Power crushing system of food processor

Abstract

The utility model provides a power crushing system of a food processor, which comprises a crushing device and a driving device, and the crushing device comprises a crushing cutter, a cutter holder shell and a transmission magnetic disk arranged in the cutter holder shell; the driving device comprises a stator iron core and a coil winding, the stator iron core and the coil winding are axially distributed with the crushing device along the rotating axis of the crushing cutter, and the driving device drives the transmission magnetic disk to rotate by generating a changing magnetic field so as to drive the crushing cutter to rotate; the stator core comprises a stator body and stator tooth poles, the coil winding is wound on the stator tooth poles, the first ends of the stator tooth poles are connected to the stator body, and the second ends of the stator tooth poles are provided with tooth pole end faces; the area of the end face of the tooth pole is larger than the area of the cross section of the stator tooth pole, and when the driving device is powered off, the end face of the tooth pole is attracted to the smashing device through the transmission magnetic disk so that the smashing device can not be taken out of a cavity of a cup body of the food processor.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of food processing machines, especially relates to a food processing machine's power disintegrating system that disintegrating knife is detachable relative to cup body and is driven by changeable magnetic field to work. BACKGROUND

[0002] The existing food processing machines such as wall breaking machine, soybean milk machine and the like generally include a main machine, a cup body detachably connected with the main machine, a disintegrating knife arranged in the cup body, a motor arranged in the main machine, a power disintegrating system including the motor and a transmission structure between the disintegrating knife and the motor, the disintegrating knife including a disintegrating blade and a knife shaft, the knife shaft being provided with a first connecting head, the motor shaft being provided with a second connecting head, the first connecting head and the second connecting head being engaged and connected to transmit the motor power to the disintegrating knife, the disintegrating blade rotating and disintegrating and processing food in the cup body. Since the connecting heads are in contact and engaged transmission, the noise and vibration noise of the motor as a power source are directly transmitted upward to the cup body and superimposed with the disintegrating noise in the cup body. With the increase of the disassembly and assembly times of the cup body and the main machine, the installation positioning and wear between the connecting heads are aggravated, the coaxiality of the connecting heads relative to the motor shaft and the knife shaft is reduced, and then transmission abnormal sound is generated, and the disintegrating performance of the food processing machine is also affected due to the reduction of the coaxiality and the disturbance of the disintegrating knife.

[0003] Another existing food processing machine is provided with the motor on the detachable cup body to avoid the wear between the connecting heads, the motor shaft is directly connected with the disintegrating knife shaft to drive the disintegrating knife to rotate, and the transmission noise between the connecting heads is avoided, but the motor is detachably arranged with the cup body, which is not conducive to the light weight of the cup body, the user is not easy to take and place the cup body, and the user operation experience is reduced. In addition, whether there is a connecting head or not, the disintegrating knife is fixedly arranged at the bottom end of the cup body, and the user is difficult to clean the disintegrating blade and the cup body space below the blade, resulting in inconvenient cleaning.

[0004] In order to solve the problem of cleaning the disintegrating knife, a food processing machine with a detachable disintegrating knife assembly appears in the industry, and the complete cleaning of the disintegrating knife is realized by the user disassembling the disintegrating knife assembly. At the same time, the problems of inconvenient disassembly and assembly and the reduction of installation alignment and sealing reliability caused by frequent disassembly and assembly of the disintegrating knife assembly are still difficult to solve. In addition, whether the disintegrating knife needs to be disassembled and cleaned or not, there is a risk of sealing aging and liquid leakage damaging the motor at the connection between the disintegrating knife shaft and the cup body.

[0005] The patent No. CN201110155563.4 discloses an indirect transmission food processor, which comprises a container, a crushing cutter arranged in the container, a motor, a base with the motor, a driving coupling arranged on the power output shaft of the motor, and a driven coupling connected with the crushing cutter. The driving coupling and the driven coupling are non-contact transmission, thereby effectively solving the wear between the driving coupling and the driven coupling, and the container does not need a cutter shaft hole and sealing, completely solving the problem of water leakage of the container, and the cutter is detachable, facilitating the cleaning of the container. However, the driving coupling and the driven coupling both adopt metal transmission magnetic disks, the driving coupling is in transmission connection with the motor, and in fact, the main machine produces double noises from the motor and the driving coupling transmission. The driven coupling is exposed to the container, and thus the noise produced by the relative movement of the driven coupling and the materials in the container is also relatively large.

[0006] The patent No. CN202211320481.5 discloses a food processor, which comprises a stirring cup assembly and a main machine assembly. The stirring cup and the stirring assembly, the stirring assembly comprises a rotating assembly, the rotating assembly comprises a driven magnet and a stirring piece, the driven magnet is a permanent magnet, the main machine assembly comprises an electromagnetic drive device, the electromagnetic drive device generates a changing magnetic field under power-on condition, the magnetic field is attracted to the driven magnet so that the rotating assembly is adsorbed on the bottom of the stirring cup, and the magnetic force between the electromagnetic drive device and the driven magnet disappears under power-off condition. The stirring assembly and the stirring cup are detachable, so that the stirring cup assembly is convenient to take after the magnetic field disappears. That is to say, when the changing magnetic field generated by the electromagnetic drive device disappears, the permanent magnet in the stirring assembly is not adsorbed by the main machine assembly, so that the stirring assembly is in a free state which can be easily removed in the stirring cup. However, the food processor belongs to a product working under high-speed working condition, the stirring piece comprises a metal crushing blade, and the highest rotating speed can be above 10,000 rpm. When there is an abnormal power-off condition, the stirring piece is not subjected to any adsorption force due to the disappearance of the changing magnetic field, and the crushing blade still keeps high-speed rotation due to inertia. At this time, the crushing blade is not controlled by external force, and the risk of flying blade and the risk of slurry splashing are extremely easy to occur. Especially when there is local material blocking between the stirring piece and the cup bottom or the bottom surface of the stirring piece is locally padded by particulate material, the crushing blade is easy to tilt when the blade is subjected to uneven stress in the circumferential and axial directions during high-speed stirring of the slurry, and the flying blade risk and the crushing abnormal sound are further aggravated. In addition, in the scheme, the magnetic field generated by the power-on of the stator structure of the electromagnetic drive device can provide limited torque, which is insufficient to drive the crushing blade to finely crush the material under the high-speed solid-liquid mixing condition. Practical new type content

[0007] The utility model discloses a food processor's power crushing system of crushing blade detachable, under the scene that the changing magnetic field is generated by electromagnetic drive device to drive the crushing blade rotation processing, solve the food processor under power-off condition, the crushing blade continues high -speed rotation due to inertia and lead to the safety problem such as flying blade, unable to keep dynamic crushing balance and lead to slurry splashing.

[0008] In order to solve the above technical problems, the utility model provides a food processor, including the rubbing device, the detachable setting in the cavity of food processor cup body, the rubbing device includes the rubbing knife, the knife seat shell, the transmission disk setting in the knife seat shell, transmission disk and rubbing knife transmission connection, the driving device includes the stator core and the coil winding, stator core and coil winding respectively with the rubbing device along the rotation axis of rubbing knife axial distribution, the driving device passes through the magnetic field of producing change and drives transmission disk rotation to drive rubbing knife rotation, the stator core includes the stator body and the stator tooth pole, the coil winding is around the stator tooth pole, the first end of stator tooth pole is connected to the stator body, and the second end of stator tooth pole is provided with the tooth pole end face, the area of tooth pole end face is greater than the cross -sectional area of stator tooth pole, when the driving device is powered off, the tooth pole end face is adsorbed with rubbing device through transmission disk, so that the rubbing device can not be taken out from the cavity.

[0009] Further, the stator body includes a yoke bridge that circumferentially connects the first ends of the plurality of stator tooth poles.

[0010] Further, the second ends of the stator tooth poles extend outward in a direction away from the first ends and gradually increase in cross-sectional area.

[0011] Further, the second ends of the stator tooth poles each extend in a direction of an adjacent two stator tooth poles to form a pole shoe, and the transmission disk is located directly above the pole shoe.

[0012] Further, the second ends of the stator tooth poles extend radially outward to form a stepped portion.

[0013] Further, a ratio of a total projection area of the stator tooth poles on a horizontal plane to a total projection area of the yoke bridge on the horizontal plane is a tooth pole arc coefficient η, and 0.5 ≤ η ≤ 0.95.

[0014] Further, the transmission disk includes a disk body and a permanent magnet fixedly arranged on the disk body, and N poles and S poles of the permanent magnet are alternately distributed in a circumferential direction.

[0015] Further, the N poles and S poles of the permanent magnet are spaced apart in the circumferential direction, or the permanent magnet is an integrated annular permanent magnet.

[0016] Further, the stator core includes an insulation layer, the insulation layer covers outer surfaces of the stator body and the plurality of stator tooth poles, and the coil winding is wound on the outer surface of the insulation layer of the stator tooth pole.

[0017] Further, the tooth pole end face and / or a bottom surface of the stator body are exposed to the insulation layer.

[0018] Furthermore, the stator core includes a first insulating layer and a second insulating layer. The first insulating layer covers the outer surface of the stator body and the stator teeth, and the second insulating layer covers the outer surface of the coil winding and the stator core.

[0019] Furthermore, the rotation center of the transmission disk is coaxial with the axis of the stator core.

[0020] Furthermore, the transmission disk includes a permanent magnet, the outer diameter of the stator core is 30mm to 100mm, and the thickness of the stator core is 15mm to 60mm.

[0021] Furthermore, the stator core is made of silicon steel sheets, which are stacked radially.

[0022] The beneficial effects of this utility model are:

[0023] 1. The pulverizing device is detachably installed within the cavity. When the food processor is powered on, the coil winding is energized, and current flows through the winding path, thereby generating a magnetic field in a direction perpendicular to the winding path. The magnetic field generated by the stator core is variable and acts on the transmission disk within the blade holder housing. Driven by the variable magnetic field, the transmission disk rotates and drives the pulverizing blade to rotate synchronously. The tooth end faces of the stator core are correspondingly positioned above and below the transmission disk, and the area of ​​the tooth end faces is larger than the cross-sectional area of ​​the stator teeth. When the drive device is de-energized, no current flows through the coil winding, and the variable magnetic field disappears. However, the pulverizing blade, in high-speed pulverizing mode, still maintains a high rotation speed due to inertia. The tooth end faces are attracted to the pulverizing device through the transmission disk, ensuring that the pulverizing device can still be reliably attracted by the tooth end faces even when not under the influence of the variable magnetic field. The pulverizing device cannot be removed from the cavity, thus ensuring that the pulverizing device will not fall out of the cavity or become dislodged when the power is off, fully guaranteeing user safety.

[0024] Especially when there is particulate material between the blade holder housing and the inner wall of the cavity during a power outage, the crushing device will be lifted on one side, causing a significant radial tilt of the rotation axis of the crushing blade, deviating from the central axis of the cavity. When the blade tip contacts the solid-liquid mixture, the particulate solid material is rebounded after contact with the blade and impacts the inner wall of the cavity, resulting in extremely uneven force on the crushing blade in the solid-liquid mixture. This exacerbates the risk of the crushing blade being thrown out, and the turbulent slurry at this time is prone to splashing. Especially when the power is just turned off, the crushing blade rotates at extremely high speed. Even though the walls of the blade holder housing and the cup body still isolate the drive disk and the tooth tip, the stator teeth can still effectively "hold" the crushing device in the unbalanced processing environment by adsorbing the drive disk to prevent the blade from flying out, allowing the slurry to continue moving within the cavity.

[0025] 2. The stator body includes a yoke bridge, which circumferentially connects the first ends of multiple stator teeth into one unit. The yoke bridge connects the magnetic circuits between each stator tooth. When the drive device is powered on, the yoke bridge can fully concentrate the magnetic field lines generated by the coil winding, so that the magnetic field lines are focused and strengthened by the yoke bridge and stator teeth of the stator core, which can generate greater torque on the transmission disk, thereby driving the pulverizer to pulverize food at high speed, resulting in a smooth and residue-free slurry.

[0026] 3. The second end of the stator tooth extends outward in a direction away from the first end, and its cross-sectional area gradually increases. The cross-sectional area refers to the section perpendicular to the rotation center of the crushing device. The outward extension direction can be any circumferential direction of a single stator tooth, thus ensuring sufficient extension area of ​​the tooth end face within the limited space of the stator core. This allows the stator tooth to reliably adhere to the drive disk in the event of a power outage, thereby axially holding the crushing device within the cavity and preventing flying blades or slurry splashing. Preferably, the second end of the stator tooth extends towards adjacent teeth on both sides. This design improves the adhesion between the stator core and the drive disk without changing the circumferential outer diameter and axial height of the stator core, ensuring user safety. Furthermore, the drive device has no moving structure, the entire main unit has no resonance, and the volume and weight of the stator core are further reduced, facilitating space optimization and overall lightweight design.

[0027] 4. The second end of each stator tooth extends towards the adjacent two sides to form a pole shoe. The transmission disk is located directly above the pole shoe. The pole shoe and the transmission disk are axially matched to avoid magnetic leakage. Moreover, the pole shoe can further improve the strength and stability of the changing magnetic field of the drive device when it is powered on, further optimize the torque transmission of the crushing blade, and avoid problems such as blade jamming and insufficient crushing when processing hard materials, as well as processing noise and unstable dynamic balance of the crushing blade due to the detachable drive device shifting laterally or longitudinally. When the drive device is powered off, the pole shoes formed by extending towards the adjacent two sides can ensure that the crushing blade is firmly attracted to the pole shoe through the transmission disk, and the crushing blade will not fly away under normal or abnormal power failure conditions.

[0028] 5. The second end of the stator tooth extends radially outward to form a stepped portion. The end face of the stepped portion is equivalent to the extreme end face of the tooth, further increasing the area of ​​the extreme end face of the tooth, which is more conducive to adsorbing the transmission disk. When the power is off, the changing magnetic field driving the pulverizing blade to rotate disappears, maintaining the motion stability of the pulverizing blade that continues to rotate at high speed in the slurry in the cavity due to inertia. The tooth arc coefficient of the food processor is η, 0.5≤η≤0.95. This setting can ensure that the outer diameter of the stator core is small and has a flat structure. The height of the stator core is less than the outer diameter to form a flat structure. The transmission disk can be rotated at high speed and can meet a large load. The food processor can process a variety of food ingredients, a wider range of hardness, and can realize a multi-functional platform for slurry processing, dry grinding, meat grinding, and dough processing.

[0029] 6. The transmission disk includes a disk body and a permanent magnet. The N and S poles on the permanent magnet are alternately distributed circumferentially. The permanent magnet is fixed to the disk body by mechanical mounting, making the transmission disk more flattened. Alternatively, the permanent magnet can be an integrally magnetized ring-shaped permanent magnet. The N and S poles of the ring-shaped permanent magnet are alternately distributed circumferentially. The three-phase coil windings on the stator teeth generate a changing magnetic field, driving the transmission disk to rotate and simultaneously rotating the pulverizing blade. This high-efficiency, high-torque drive of the pulverizing blade meets the processing needs of various types of food, and the stable power drive optimizes the pulverizing efficiency of the blade.

[0030] 7. The coil winding is wound around the outer surface of the insulation layer of the stator teeth, eliminating the need for a separate winding bracket. This simplifies the entire power drive device structurally, reduces its size, and allows for a further reduction in the stator core diameter. It also simplifies installation and optimizes assembly efficiency. Preferably, the tooth end faces and / or the bottom surface of the stator body are exposed on the insulation layer, further reducing the overall height of the core and allowing for a flatter design to meet the storage needs of small kitchen spaces. Alternatively, a first and second insulation layer can be provided to further enhance the electrical safety of the drive device.

[0031] 8. The rotation center of the drive disk is coaxially arranged with the axis of the stator core, enabling the changing magnetic field generated by the drive device to be efficiently and effectively utilized by the drive disk. Furthermore, in the event of a power outage, no changing magnetic field acts on the crushing device, which rotates within the cavity solely under gravity. The coaxial arrangement of the rotation center of the drive disk and the axis of the stator core ensures the circumferential uniformity of the adsorption force between the drive disk and the tooth end faces, preventing uneven force on the crushing device at the initial high-speed operation after a power outage, and avoiding slurry splashing caused by turbulent slurry flow.

[0032] 9. The outer diameter of the stator iron (30mm-100mm) and the thickness of the stator iron core (15mm-60mm) can ensure that the drive device with no moving parts is miniaturized and easy to install. Moreover, there is no need to consider the dynamic balance and flexible shock absorption structure of the drive device, which greatly simplifies the design and installation cost of the host machine and is more conducive to the expansion and extension of the product functions and cup body component structure of the new power platform for frequency conversion drive of food processing machine. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the overall structure of the food processing machine described in this utility model.

[0035] Figure 2 This is a schematic diagram of the combined structure of the crushing device and the driving device of the food processing machine described in this utility model.

[0036] Figure 3 This is a schematic diagram of the drive device for the food processing machine described in this utility model.

[0037] Figure 4 This is a schematic diagram of the stator core structure of the food processing machine described in this utility model.

[0038] Figure 5 This is a schematic diagram of the stator core yoke bridge of the food processing machine described in this utility model.

[0039] Figure 6 This is a schematic diagram of the transmission disk structure of the food processing machine described in this utility model.

[0040] Figure 7 A schematic diagram of the stator core structure of the food processing machine described in this utility model, which has an insulating layer.

[0041] Figure 8 This is a schematic diagram of another stator core structure of the food processing machine described in this utility model.

[0042] Figure 9 This is a schematic diagram of another drive device for the food processing machine described in this utility model.

[0043] Figure 10 This is a schematic projection of the permanent magnet of the transmission disk of the food processing machine described in this utility model.

[0044] Figure 11This is a projected schematic diagram of the transmission disk structure of the food processing machine described in this utility model.

[0045] Figure 12 This is a schematic diagram of the changing magnetic field lines generated by the drive device of the food processing machine described in this utility model.

[0046] The components shown in the diagram are named as follows: 100, Drive unit; 101, Stator core; 102, Coil winding; 103, Stator body; 104, Tooth end face; 105, Yoke bridge; 106, Pole shoe; 107, Stepped section; 108, Insulation layer; 109, First insulation layer; 110, Second insulation layer; 111, Hole; 112, Stator tooth pole; 200, Crushing device; 201, Crushing blade; 202, Blade holder housing; 203, Drive disk; 204, Disk body; 205, Permanent magnet; 300, Cup assembly; 301, Cup; 302, Cavity; 400, Heating device; 401, Heating element; 500, Main unit. Detailed Implementation

[0047] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] like Figures 1 to 12 As shown, this utility model provides a power pulverizing system for a food processor, including a pulverizing device 200 and a driving device 100. The pulverizing device 200 includes a pulverizing blade 201, a blade holder housing 202, and a transmission disk 203 disposed within the blade holder housing 202. The transmission disk 203 is drively connected to the pulverizing blade 201. The pulverizing device 200 is detachably disposed within the cavity 302 of the food processor's cup body. The heating device 400 of the food processor includes a heating element 401 for heating food within the cavity. The driving device 100 includes a stator core 101 and a coil winding 102. The stator core 101 and the coil winding 102 are axially distributed along the rotation axis of the pulverizing blade 201 with respect to the pulverizing device 200. The driving device 100 drives the food processor by generating a changing magnetic field. The transmission disk 203 rotates to drive the pulverizing blade 201 to rotate; the stator core 101 includes a stator body 103 and stator teeth 112, with winding grooves between adjacent stator teeth, and the coil winding 102 is wound on the stator teeth. The first end of the stator teeth 112 is connected to the stator body 103, and the second end of the stator teeth is provided with a tooth end face 104; the area of ​​the tooth end face 104 is larger than the cross-sectional area of ​​the stator teeth. When the drive device 100 is de-energized, the tooth end face 104 is attracted to the pulverizing device 200 through the transmission disk 203, so that the pulverizing device 200 cannot be removed from the cavity. The user cannot remove the pulverizing device 200 from the cavity using conventional force, but instead the entire food processing machine will be lifted.

[0049] Currently, the industry has disclosed a technical solution, such as the invention patent with patent number CN202211320481.5, which discloses a food processor including a blending cup assembly and a main unit assembly. The blending cup and the blending assembly include a rotating component, which includes a driven magnet and a stirring element. The driven magnet is a permanent magnet. The main unit assembly includes an electromagnetic drive device. When energized, the electromagnetic drive device generates a changing magnetic field. The magnetic field attracts the driven magnet, causing the rotating component to be attracted to the bottom of the blending cup. When de-energized, the magnetic force between the electromagnetic drive device and the driven magnet disappears, and the blending component can be separated from the blending cup. This allows the blending cup assembly to be easily removed after the magnetic field disappears. In other words, when the changing magnetic field generated by the electromagnetic drive device disappears, the permanent magnet in the blending component is not attracted by the main unit assembly, thus allowing the blending component to be easily removed from the blending cup. However, food processing machines operate at high speeds. The mixing components, including metal pulverizing blades, typically reach speeds exceeding 10,000 rpm. In the event of a power outage, the changing magnetic field disappears, and the mixing components are no longer subject to any attraction. Furthermore, the pulverizing blades continue to rotate at high speed due to inertia. In this situation, the blades are not under external control, making them highly susceptible to the risk of flying blades and slurry splashing. Especially when there is localized material jamming between the mixing components and the bottom of the container, or when the bottom of the mixing components is partially supported by granular material, the uneven circumferential and axial forces on the blades during high-speed mixing can easily cause the blades to tilt, further increasing the risk of flying blades and producing abnormal grinding noise. A readily conceivable solution in existing technology is to install independent magnets on both the pulverizing device and the main unit to hold the pulverizing device in place and prevent it from falling off. For example, patent CN201910004484.X discloses a juicer using a split brushless motor. The first and second fixed magnets attract each other magnetically to better secure the juicer lid to the base, preventing the juicer from tipping over during operation. As is common knowledge in the industry, juicers require far less torque than food processors like blenders for processing beans. Their lower speed range and cold processing eliminate the safety risks of blades moving at high speed towards the lid and opening it, or hot liquid splashing from the vent. These are user safety hazards, not simply machine malfunctions. While the patent describes using additional fixed magnets to ensure basic operational stability and prevent tipping, and also allows for a more efficient space layout, for food processors with heat processing capabilities, adding extra magnets not only increases costs but also significantly impacts the magnetic field between the drive disk and the stator core, directly leading to magnetic instability and reduced drive performance. In addition, with limited installation space, it is difficult to ensure that the heating device, adsorption device and electromagnetic drive device do not interfere with each other.Of course, this existing patent further confirms that when using a coil to generate a magnetic field to drive the pulverizing device, it is difficult to achieve a safe connection between the pulverizing blade and the main unit without adding additional structural components. Clearly, those skilled in the art, inspired by the aforementioned existing patent, would readily agree that in scenarios where a coil generates a magnetic field to drive the pulverizing device, the magnetic field disappears after power is cut off, and the pulverizing device will no longer be subject to axial external forces from the driving device other than gravity. Furthermore, in the solutions of the two aforementioned existing patents, the torque provided by the magnetic field generated by the energized stator structure of the electromagnetic drive device is very limited, insufficient to drive the pulverizing blade in the fine pulverization of high-speed solid-liquid mixtures.

[0050] This solution aims to creatively identify and address the technical problems of magnetic drive devices, overcome the industry's technical prejudice that magnetic drive devices cannot adsorb pulverizing devices when power is off, and develop a technical solution that can still firmly adsorb pulverizing devices even when the magnetic drive device is powered off. From identifying the motivation for the technical problem, to pinpointing the problem, and then to finding a solution, this involves overcoming a technical prejudice that is difficult for those skilled in the art to overcome and is also difficult to conceive of. The outstanding substantive features and significant progress of this technical solution lie precisely in this. Specifically, this implementation is preferred, such as... Figure 1 and Figure 2 As shown, the food processing machine includes a main unit 500, and the cup assembly 300 is detachably installed on the main unit 500. The cup assembly 300 includes a cup body and a cup base. Preferably, the heating element 400 is disposed on the bottom wall of the cup body and at the junction of the bottom wall and the side wall to heat the material in the cavity. The crushing device 200 is detachably installed on the bottom wall of the cavity. Preferably, the driving device 100 is disposed in the main unit and is disposed below the cup base, that is, below the crushing device 200. For a food processor in which the cup assembly 300 is detachable from the main unit, the crushing device 200 cannot be removed from the cavity. This means that, without an additional cup ejection mechanism or demagnetizing mechanism, when the hand holding the cup assembly 300 lifts the cup upwards, the cup assembly 300 is attracted and does not separate by the attraction force between the transmission disk 203 and the tooth end face 104. If the lifting force is large enough, the cup assembly 300 and the main unit will be lifted together. Similarly, the same applies when the hand holding the crushing device 200 is lifted upwards.

[0051] like Figure 3 As shown, the coil winding 102 includes a three-phase symmetrical winding (ABC). Vector control of the three-wire coil winding 102 is achieved through a control chip circuit, thereby generating a stator rotating magnetic field. This stator rotating magnetic field attracts the transmission disk 203 to rotate, thus driving the crushing blade 201 to rotate and process the material within the cavity. Figure 12As shown, when the food processing machine is energized, the coil winding 102 is energized, and current flows through the winding path, defined as the plane direction formed by the x and y axes. A magnetic field is then generated in the z-axis direction, perpendicular to the winding path. The magnetic field generated by the stator core 101 is variable and acts on the transmission disk 203 within the tool holder housing 202. The ABC phases of the coil winding are energized, generating a changing rotating magnetic field. The direction of the magnetic field lines in one state of energized coil winding is as follows: Figure 12 As shown, the black area represents the schematic diagram of one of the magnetic field lines. The magnetic field line passes upward through the N pole of the permanent magnet and downward through the S pole of the permanent magnet, forming a closed-loop magnetic circuit along the adjacent stator tooth poles 112. Driven by the changing magnetic field, the transmission disk 203 rotates and drives the pulverizing blade 201 to rotate synchronously, thereby providing a large torque to the pulverizing device and ensuring the stability of pulverizing efficiency and sound quality during processing. The tooth end faces 104 of the stator core 101 are vertically aligned with the transmission disk 203, as shown... Figure 4 and Figure 5 As shown, the area of ​​the tooth end face 104 is larger than the cross-sectional area of ​​the stator tooth pole 112. When the drive device 100 is de-energized, no current flows through the coil winding 102, and the changing magnetic field disappears. However, the pulverizing blade 201 in high-speed pulverizing state still maintains a high rotation speed due to inertia. The tooth end face 104 is attracted to the pulverizing device 200 through the transmission disk 203, which fully ensures that the pulverizing device 200 can still be reliably attracted by the tooth end face 104 when it is not affected by the changing magnetic field. The pulverizing device 200 cannot be removed from the cavity, thereby ensuring that the pulverizing device 200 will not fall out of the cavity or fly away when the power is off, thus fully ensuring the user's safety.

[0052] Especially when there is particulate material between the blade holder housing 202 and the inner wall of the cavity during a power outage, the crushing device 200 will be lifted on one side, causing a large radial tilt of the rotation axis of the crushing blade 201, deviating from the central axis of the cavity. When the tip of the crushing blade 201 comes into contact with the solid-liquid mixture, the particulate solid material is rebounded after contacting the blade and bounces back against the inner wall of the cavity. This results in an extremely uneven force on the crushing blade 201 in the solid-liquid mixture, increasing the risk of the crushing blade 201 being thrown out. At this time, the turbulent slurry is very prone to splashing. Especially when the power is just turned off, the crushing blade 201 rotates at a very high speed. Even though the drive disk 203 and the tooth end face 104 are still isolated by the blade holder housing 202 and the wall of the cup, the stator tooth 112 can still effectively "hold" the crushing device 200 by adsorbing the drive disk 203 in the unbalanced processing environment to prevent the blade from flying out, so that the slurry can still keep moving in the cavity. Preferably, the distance between the stator core 101 and the permanent magnet 205 on the transmission disk 203 is set to 2-12 mm, and more preferably, the distance between the stator core 101 and the permanent magnet 205 on the transmission disk 203 is set to 2.5 mm-8 mm. Even if the transmission disk 203 and the tooth end face 104 of the stator core 101 are isolated by the blade holder housing 202 and the bottom wall of the cup, it can still be guaranteed that the transmission torque of the drive device 100 reaches more than 0.8 N·m when the power is off, and the attraction between the tooth end face 104 and the transmission disk 203 is greater than 30 N. On the one hand, the crushing effect of the crushing blade 201 is good when the power is on, and the slurry is processed more finely. On the other hand, the crushing blade 201 will not fly away or the slurry will splash when the power is off.

[0053] like Figure 5 As shown, the stator body 103 includes a yoke bridge 105, which circumferentially connects the first ends of multiple stator teeth into a single unit. Preferably, in this embodiment, the yoke bridge 105 is an annular structure with a certain thickness and a central hole 111 for clearance. The yoke bridge 105 connects the magnetic circuits between each stator tooth. When the drive device 100 is energized, the yoke bridge 105 can fully concentrate the magnetic field lines generated by the coil winding 102, allowing the magnetic field lines to be focused and strengthened by the yoke bridge 105 and the stator teeth of the stator core 101. This generates greater torque on the transmission disk 203, driving the pulverizer 201 to pulverize food at high speed, resulting in a smooth, fine, and residue-free slurry. The number of stator teeth is a multiple of 3; in this embodiment, 6 stator teeth are preferably provided.

[0054] The second end of the stator tooth extends outward in a direction away from the first end, and its cross-sectional area gradually increases. This cross-sectional area refers to the section perpendicular to the rotation center of the crushing device 200. The outward extension can be in any circumferential direction of a single stator tooth, thus ensuring sufficient extension area of ​​the tooth end face 104 within the limited space of the stator core 101. This allows the stator tooth to reliably adhere to the transmission disk 203 even when power is off, thereby axially holding the crushing device 200 within the cavity and preventing knife flying or slurry splashing. Preferably, the second end of the stator tooth extends towards adjacent teeth on both sides. This arrangement improves the adhesion between the stator core 101 and the transmission disk 203 without changing the circumferential outer diameter and axial height of the stator core 101, ensuring user safety. In addition, the drive unit 100 has no moving parts and is entirely a stationary component. The entire main unit does not have any resonance caused by the drive unit 100, which greatly reduces the noise of the food processing machine. Furthermore, the size and weight of the stator core 101 are further reduced, which is more conducive to optimizing the main unit space and making the whole machine lighter.

[0055] As a preferred option, such as Figure 4 and Figure 5 As shown, the second end of the stator tooth poles extends towards the adjacent tooth poles to form pole shoes 106. The transmission disk 203 is located directly above the pole shoes 106. The pole shoes 106 and the transmission disk 203 are axially matched to avoid magnetic leakage. Moreover, the pole shoes 106 can further improve the strength and stability of the changing magnetic field of the drive device 100 when it is powered on, further optimize the torque transmission of the crushing blade 201, and avoid problems such as blade jamming and insufficient crushing when processing hard materials, as well as processing noise and unstable dynamic balance of the crushing blade 201 caused by the detachable drive device 100 shifting laterally or longitudinally. When the drive device 100 is powered off, the pole shoes 106 formed by extending towards the adjacent tooth poles can ensure that the crushing blade 201 is firmly attracted to the pole shoes 106 through the transmission disk 203 to the maximum extent, and the crushing blade 201 will not have the risk of flying off under normal or abnormal power failure. Moreover, without the aid of an additional separation structure or demagnetizing mechanism, the cup assembly 300 cannot be detached from the main unit. When the user holds the handle of the cup assembly 300 to lift the cup, the entire food processing machine can be lifted by the adsorption force between the transmission disk 203 and the tooth end face 104.

[0056] The ratio of the total projected area of ​​the stator teeth on the horizontal plane to the total projected area of ​​the yoke bridge 105 on the horizontal plane is the tooth arc coefficient η, where 0.5≤η≤0.95. In this embodiment, η is 0.75. This setting ensures that the outer diameter of the stator core 101 is small and has a flat structure. The height of the stator core 101 is smaller than the outer diameter to form a flat structure. The transmission disk 203 can be rotated at high speed and can meet a large load. The food processing machine can process a variety of food ingredients with a wider range of hardness and can realize a multi-functional platform for processing slurry, dry grinding, meat grinding and dough processing.

[0057] like Figure 6 As shown, the transmission disk 203 includes a disk body 204 and a permanent magnet 205 fixedly disposed on the disk body 204. The N pole and S pole of the permanent magnet 205 are alternately distributed circumferentially. Specifically, the N pole and S pole of the permanent magnet 205 are spaced apart circumferentially. The permanent magnet 205 is preferably made of neodymium iron boron material, and the thickness of the permanent magnet 205 is preferably 2mm to 6mm. In this embodiment, the thickness of the permanent magnet 205 is 4.1mm, which allows the transmission disk 203 to have strong magnetism and sufficient torque, while also being able to reliably attract and cooperate with the tooth end face 104. The transmission disk 203 is equivalent to a rotor that is axially cooperated with the stator core 101. The permanent magnet 205 is fixed to the disk body 204 by mechanical installation, making the transmission disk 203 more flat. Of course, the permanent magnet 205 can also be configured as an integral ring-shaped permanent magnet 205. Specifically, the permanent magnet 205 can also be an integrally magnetized ring-shaped permanent magnet 205, with the N pole and S pole of the ring-shaped permanent magnet 205 circumferentially alternating. The three-phase coil winding 102 on the stator teeth generates a changing magnetic field when energized, driving the transmission disk 203 to rotate and causing the crushing blade 201 to rotate synchronously. The high-efficiency, high-torque drive of the crushing blade 201 meets the processing needs of various types of food, and the crushing efficiency of the crushing blade 201 is optimized through stable power drive. Figure 10 and Figure 11 As shown, the number of permanent magnets 205 is even, preferably eight. The ratio of the total projected area of ​​the permanent magnets 205 in the horizontal plane to the total projected area of ​​the transmission disk 203 is the magnetic pole arc coefficient. In this embodiment, the magnetic pole arc coefficient is in the range of 0.5 to 1, which further optimizes the attraction force between the transmission disk 203 and the tooth end face 104 when power is off, as well as the torque transmission when power is on. When the magnetic pole arc coefficient is 1, the permanent magnet 205 completes one full circle.

[0058] This embodiment further optimizes the driving device 100, specifically, as follows: Figure 7As shown, the stator core 101 includes an insulating layer 108, which covers the outer surfaces of the stator body 103 and multiple stator teeth. The coil winding 102 is wound around the outer surface of the insulating layer of the stator teeth. The coil winding 102 is wound around the outer surface of the insulating layer of the stator teeth, eliminating the need for a separate winding bracket or additional support base. This simplifies the structure of the entire power drive device 100, reduces its volume, further shrinks the diameter of the stator core 101, simplifies installation, and optimizes assembly efficiency. Preferably, the tooth end face 104 and / or the bottom surface of the stator body 103 are exposed to the insulating layer. In this embodiment, both the tooth end face 104 and the bottom surface of the stator body 103 are exposed to the insulating layer, further reducing the overall height of the core and allowing for a more flat design to meet the storage needs of small kitchen spaces. It is understandable that... Figure 9 As shown, other types of insulation layers can also be provided. The stator core 101 includes a first insulation layer 109 and a second insulation layer 110. The first insulation layer covers the outer surface of the stator body 103 and the stator teeth, with the tooth end face exposed outside the first insulation layer. The second insulation layer covers the outer surface of the coil winding 102 and the stator core 101, further improving the electrical safety of the drive device 100, while making the drive device 100 waterproof as a whole and allowing it to be exposed.

[0059] The rotation center of the drive disk 203 is coaxially arranged with the axis of the stator core 101, so that the changing magnetic field generated by the drive device 100 can be efficiently and effectively utilized by the drive disk 203. In addition, in the case of power failure, no changing magnetic field acts on the crushing device 200, and the crushing device 200 rotates in the cavity only under the action of gravity. The coaxial arrangement of the rotation center of the drive disk 203 and the axis of the stator core 101 can fully ensure the circumferential uniformity of the adsorption force between the drive disk 203 and the tooth end face 104, avoiding uneven force on the crushing device 200 and slurry splashing caused by slurry turbulence during the initial high-speed operation after power failure.

[0060] The transmission disk 203 includes a permanent magnet 205. The outer diameter of the stator core 101 is 30mm to 100mm, and the thickness of the stator core 101 is 15mm to 60mm, which makes the stator core 101 have a flat structure. This allows the main unit to be extremely thin, fully satisfying the user's convenience in picking up and putting away the device and its retractability. The drive device 100, which has no moving parts, is miniaturized and easy to install. Moreover, there is no need to consider the dynamic balance and flexible shock absorption structure of the drive device 100, which greatly simplifies the design and installation cost of the main unit and is more conducive to the product function and structural expansion of the new power platform for the variable frequency drive of the food processing machine. The stator core 101 is made of silicon steel sheet material, and the silicon steel sheets are stacked radially to further improve the performance of the stator core 101. This allows the coil winding 102 wound on the stator core 101 to carry three-phase current and generate a changing magnetic field through the stator core 101, providing sufficient torque to the permanent magnet 205 in the crushing device 200 to drive the crushing blade 201 to rotate synchronously.

[0061] Understandable, such as Figure 8 As shown, the second end of the stator tooth pole can also be configured as a stepped portion 107. Specifically, the second end of the stator tooth pole extends radially outward to form a stepped portion 107. The end face of the stepped portion 107 is equivalent to the tooth end face 104, which further expands the area of ​​the tooth end face 104, making it more conducive to adsorbing the transmission disk 203. When the power is off, the changing magnetic field that drives the pulverizer 201 to rotate disappears, maintaining the motion stability of the pulverizer 201 that continues to rotate at high speed in the slurry in the cavity due to inertia.

[0062] Understandably, the user experience of the food processing machine can be further optimized by setting a lifting structure for the cup assembly 300. The lifting structure for the cup assembly 300 can also be used as a lifting rod mechanism or an electronically controlled cup lifting mechanism. The trigger part of the lifting rod structure can be set on the grip part of the cup body or on the cup base.

[0063] Understandably, the driving device 100 can be located on the side of the cup body or on the top of the cup body. Correspondingly, the crushing device 200 can also be configured to be installed and cooperate with the side wall of the cup body, with the crushing blade 201 shaft extending laterally, or the crushing device 200 can be installed and cooperate with the top wall of the cup body.

[0064] Understandably, the drive device shown can also be installed in the cup holder below the cup body, so that the drive device is part of the cup body assembly and does not need to be independently installed in the main unit or other independent component space, thus ensuring user safety.

[0065] In addition to the preferred embodiments described above, the technical solutions protected by this utility model are not limited to the above embodiments. It should be noted that the combination of multiple technical solutions in any one embodiment, as well as the combination of technical solutions in any one embodiment with technical solutions in one or more other embodiments, are within the protection scope of this utility model. Although this utility model has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A power blending system for a food processor, characterized by, The application relates to a food processor, which comprises the following parts: a crushing device, which is detachably arranged in a cavity of a cup body of the food processor, and comprises a crushing knife, a knife seat shell, and a transmission magnetic disk arranged in the knife seat shell and in transmission connection with the crushing knife; a driving device, which comprises a stator core and a coil winding, and is axially distributed along a rotation axis of the crushing knife, and drives the transmission magnetic disk to rotate by generating a changing magnetic field, so as to drive the crushing knife to rotate; the stator core comprises a stator body and a stator tooth pole, the coil winding is arranged on the stator tooth pole, a first end of the stator tooth pole is connected to the stator body, and a second end of the stator tooth pole is provided with a tooth pole end face; an area of the tooth pole end face is larger than a cross-sectional area of the stator tooth pole, and when the driving device is powered off, the tooth pole end face is adsorbed to the crushing device through the transmission magnetic disk, so that the crushing device cannot be taken out from the cavity.

2. The food processor's dynamic pulverizing system according to claim 1, characterized in that, the stator body comprises a yoke bridge, which integrally connects first ends of a plurality of the stator tooth poles in a circumferential direction.

3. The food processor's dynamic pulverizing system according to claim 1, characterized in that, the second end of the stator tooth pole extends outward in a direction away from the first end and gradually increases in cross-sectional area.

4. The food processor's dynamic pulverizing system according to claim 1, characterized in that, the second end of the stator tooth pole extends to form a pole shoe in a direction of two adjacent stator tooth poles, and the transmission magnetic disk is located directly above the pole shoe.

5. The food processor's dynamic pulverizing system according to claim 1, characterized in that, the second end of the stator tooth pole extends radially outward to form a stepped portion.

6. The food processor's dynamic pulverizing system according to claim 2, characterized in that, a ratio of a total projection area of the stator tooth pole in a horizontal plane to a total projection area of the yoke bridge in the horizontal plane is a tooth pole arc coefficient n, and 0.5<=n<=0.

95.

7. The food processor's dynamic pulverizing system according to claim 1, characterized in that, the transmission magnetic disk comprises a magnetic disk body and a permanent magnet fixedly arranged on the magnetic disk body, and N poles and S poles of the permanent magnet are alternately distributed in a circumferential direction.

8. The food processor's dynamic pulverizing system according to claim 7, characterized in that, the N poles and the S poles of the permanent magnet are spacedly distributed in the circumferential direction, or the permanent magnet is an integrated annular permanent magnet.

9. The food processor's dynamic pulverizing system according to claim 1, characterized in that, the stator core comprises an insulation layer, which covers outer surfaces of the stator body and the plurality of stator tooth poles, and the coil winding is wound on the outer surface of the insulation layer of the stator tooth pole.

10. The food processor's dynamic pulverizing system according to claim 9, characterized in that, the tooth pole end face and / or a bottom surface of the stator body are exposed to the insulation layer.

11. The food processor's dynamic pulverizing system according to claim 1, characterized in that, the stator core comprises a first insulation layer and a second insulation layer, the first insulation layer covers outer surfaces of the stator body and the stator tooth pole, and the second insulation layer covers outer surfaces of the coil winding and the stator core.

12. The food processor's dynamic pulverizing system according to claim 1, characterized in that, a rotation center of the transmission magnetic disk is coaxially arranged with an axis of the stator core.

13. The food processor's dynamic comminution system of claim 1, wherein, the transmission magnetic disk comprises a permanent magnet, an outer diameter of the stator core is 30mm-100mm, and a thickness of the stator core is 15mm-60mm.

14. The food processor's dynamic comminution system of claim 1, wherein, the stator core is made of silicon steel sheets, and the silicon steel sheets are arranged in a radial direction.

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