A food processor with a stable operation

Abstract

The utility model belongs to kitchen appliance technical field discloses a kind of stable operation's food processor, including comminuting device and motor, motor includes stator, rotor, the rotating shaft protruding from rotor, the upper end of rotating shaft is transmission cooperation with comminuting device, motor further includes the balance weight being arranged above rotor and the fan being arranged below rotor, the density of fan is less than the density of balance weight, fan includes integrally formed first balancing portion, second balancing portion and fan blade, first balancing portion is close to rotor and with balance weight opposite arrangement, second balancing portion extends downward from the lower end of first balancing portion and projects outward along radial direction, fan blade is arranged in second balancing portion and is arranged along circumferential direction interval. The initial unbalance of rotor is reduced on the basis of reducing cost, reducing assembly error, the balanced operation of rotor is realized, motor vibration is improved, and rotation noise is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen appliance technology, specifically relating to a stable food processing machine. Background Technology

[0002] Existing food processing machines rely on motors to drive high-speed rotating pulverizing blades for pulverizing. However, when the rotor mass distribution is uneven, high-speed rotation generates centrifugal force differences, leading to problems such as vibration, noise, and bearing wear caused by unstable rotation. Therefore, balance blocks are used to correct the rotor mass distribution and improve the motor's operational balance. For example, the applicant's earlier patent application CN214964818U discloses a structurally reliable food processing machine. In this machine, the motor includes an upper end plate and a lower end plate located at the upper and lower ends of the rotor, and a fan fixed to the lower end plate. The end plate has balancing steps for cutting during dynamic balancing. The fan is fixed to the lower end plate via a first and a second limiting part. During assembly, the lower end plate and fan need to be installed sequentially, making the assembly process complex. Furthermore, due to manufacturing errors in the lower end plate and fan, accumulated assembly errors exist between the lower end plate and the rotor, and between the fan and the lower end plate after assembly, affecting the motor's operational balance and increasing the difficulty of dynamic balancing.

[0003] The applicant has also applied for patent CN220732459U, which discloses a stable and reliable permanent magnet brushless DC motor. The rotor includes a fixed cage integrally formed outside the rotor core. The fixed cage includes end plates located at both ends of the rotor core and fixed posts located on the outer wall of the rotor core and connecting the end plates at both ends. The rotor also includes a fan integrally formed with the fixed cage. This design ensures the strength of the fan and avoids errors caused by the fan's assembly with the rotor, thereby improving the stability and reliability of the rotor's operation.

[0004] However, in the above scheme, the fixed cage fully wraps and positions the rotor, which results in an obvious asymmetry in the volume of the fixed cage at the top and bottom of the rotor. Since the fixed cage is a single piece of plastic with uniform density, it obviously amplifies the difference in sway at both ends of the rotor, that is, the initial imbalance of the rotor is large. Although the fixed cage can be machined to balance the rotor, the large initial imbalance of the rotor will still increase the difficulty of correction, make correction more laborious, and result in poor balancing effect.

[0005] In both the first and second schemes mentioned above, as well as other existing technologies, the two balance blocks located on the upper and lower sides of the rotor are made of the same material and have the same adjustment reference, which makes it impossible to further improve the adjustment accuracy. Utility Model Content

[0006] This invention provides a stable food processing machine to solve the technical problems of existing technologies, which, in order to avoid complex fan assembly and large assembly errors, result in large initial rotor imbalance, leading to laborious rotor dynamic balancing correction and low adjustment accuracy.

[0007] The technical solution adopted in this utility model is as follows:

[0008] This utility model provides a stable food processing machine, including a crushing device and a motor. The motor includes a stator, a rotor, and a rotating shaft extending from the rotor. The upper end of the rotating shaft is driven by the crushing device. The motor also includes a balance block disposed above the rotor and a fan disposed below the rotor. The density of the fan is less than that of the balance block. The fan includes an integrally formed first balance part, a second balance part, and fan blades. The first balance part is close to the rotor and is disposed opposite to the balance block. The second balance part extends downward from the lower end of the first balance part and protrudes outward in a radial direction. The fan blades are disposed on the second balance part and are spaced apart in a circumferential direction.

[0009] This utility model provides a stable food processing machine. The motor includes a balance block disposed above the rotor and a fan disposed below the rotor. The density of the fan is less than that of the balance block, thus reducing the material cost of the fan. Dynamic balance calibration of the motor is achieved by machining or adding weight to the first and second balancing parts of the fan. Compared to the balance block, which uses high-density, high-cost materials, this method saves material costs and achieves cost reduction. Simultaneously, because the density of the fan is less than that of the balance block, the adjustment precision and range of the fan and balance block are differentiated. For example, drilling a balancing hole in the less dense fan allows for a smaller range of gravity adjustment compared to drilling the same hole in the denser balance block, resulting in a more precise adjustment range. Therefore, for situations requiring small-amplitude balance correction, fan-based correction offers higher adjustment accuracy than the balance block. Thus, using the balance block for large-amplitude balance adjustments and the fan for small-amplitude balance adjustments makes dynamic balance adjustment easier and more precise. Based on this, the fan includes an integrally formed first balancing part, a second balancing part, and fan blades. The first balancing part is close to the rotor and is disposed opposite to the balancing block. The first balancing part and the balancing block form an equivalent structure, which facilitates the synchronous balancing calibration operation of the two during dynamic balancing correction and simplifies the balancing calibration operation. Since the density of the first balancing part is less than that of the balancing block, there will be a mass difference when the two structures are equivalent. Therefore, the second balancing part extends downward from the lower end of the first balancing part and protrudes outward in the radial direction. By extending downward, it compensates for part of the mass difference with the balancing block in the axial direction. By protruding outward in the radial direction, it continues to compensate for part of the mass difference with the dynamic balancing block in the radial direction. The fan blades are disposed on the second balancing part and spaced apart in the circumferential direction, further compensating for part of the mass difference with the dynamic balancing block, and at the same time forming a correction of rotational balance. Therefore, the axial and radial extension designs of the second balancing section, relative to the first balancing section, greatly reduce the mass difference between the balancing blocks of different densities and the integrated fan, reduce the initial imbalance of the rotor, and make the initial sway of the upper and lower parts of the rotor more consistent. This allows the imbalance to be quickly corrected during dynamic balancing, achieving balanced operation of the rotor, improving motor vibration, and reducing rotational noise.

[0010] In a preferred embodiment, the second balancing part includes an annular wall connected to the lower edge of the first balancing part and an extension wall extending radially outward from the lower end of the annular wall, wherein a noise reduction cavity is formed on the inner side of the annular wall.

[0011] By setting the second balancing section as a ring wall, the uneven mass distribution with the balance block along the axial direction is eliminated, achieving a balancing effect similar to a balancing ring. This allows for more flexible and effortless balancing of the rotor rotation, correcting runout. Simultaneously, a noise-reducing cavity is formed on the inner side of the ring wall, reducing the outward transmission of noise during motor operation and achieving noise reduction. By setting an extended wall, the uneven mass distribution with the balance block is eliminated radially, reducing the initial rotor imbalance.

[0012] In a preferred embodiment, the first balancing part includes a fixed ring sleeved on the rotating shaft, an outer ring spaced around the fixed ring, and a balancing body connected between the fixed ring and the outer ring, wherein the ring wall is connected to the lower end of the outer ring.

[0013] The first balancing part achieves its own balancing adjustment purpose by superimposing and cooperating three parts: a fixed ring, an outer ring that is spaced around the fixed ring, and a balancing body that connects the fixed ring and the outer ring. At the same time, the outer ring or balancing body serves as a mechanical machining correction position. The structure is simple and facilitates dynamic balancing correction. The ring wall is connected to the lower end of the outer ring, which can generate a larger balancing torque at a larger radius, making balancing correction less labor-intensive and improving the balancing effect of the motor operation.

[0014] In a preferred embodiment, the lower end of the rotating shaft extends into the noise reduction cavity and is connected to a bearing, the bearing being at least partially located within the noise reduction cavity.

[0015] By placing at least a portion of the bearing within the noise reduction cavity, the bearing and the ring wall share a common height space, which helps to reduce the overall height of the motor, lower the center of gravity, improve the balance and stability of operation, and also enables the miniaturization of the food processing machine. The noise generated at the mating position of the shaft and the bearing can be weakened by the noise reduction cavity, achieving a better noise reduction effect.

[0016] In a preferred embodiment, the fan blade protrudes from the side of the extension wall facing the stator, and a gap is provided between the fan blade and the annular wall.

[0017] By protruding the fan blades on the side of the extension wall facing the stator, the fan blades are close to the stator, driving the airflow to directly exchange heat with the stator, thus achieving rapid heat dissipation of the motor. By setting a gap between the fan blades and the ring wall, a pressure difference is formed at the gap when the fan rotates. The fan blades drive the airflow smoothly into the gap from the mating seam between the stator and the rotor along the axial direction, and then throw it out along the radial direction of the fan blades, thus achieving efficient heat dissipation of the stator coils and other components.

[0018] In a preferred embodiment, the fan blades extend away from the axis of rotation and gradually decrease in thickness.

[0019] By designing the fan blades with a structure that gradually decreases in thickness away from the shaft, the center of gravity of the fan blades is centered, improving the alignment with the shaft, preventing fan blade vibration or tilting, reducing inertial resistance during startup, making it easier for the fan to reach a stable speed, and contributing to the smooth rotation of the rotor and shaft.

[0020] In a preferred embodiment, the stator is provided with a receiving cavity for accommodating the rotor, the first balancing part extends into the receiving cavity, and the second balancing part is located outside the receiving cavity and blocks the annular gap formed between the first balancing part and the receiving cavity.

[0021] Since there is a fitting seam between the rotor and the stator cavity wall, and the first balancing part extends into the cavity and forms a fitting seam with the cavity wall, when the fan rotates, it will drive the airflow to flow and dissipate heat along the fitting seam, which will also bring wind noise. Therefore, by having the second balancing part located outside the cavity and blocking the annular gap formed between the first balancing part and the cavity, the direct transmission of heat dissipation noise can be blocked and reduced, thus reducing heat dissipation noise.

[0022] In a preferred embodiment, the fan blade is located on the side of the second balancing portion facing the stator and extends below the annular gap.

[0023] The fan blades are located on the side of the second balancing part facing the stator and extend below the annular gap. During rotation, they directly drive the airflow to flow smoothly through the annular gap, achieving rapid airflow circulation and thus rapidly cooling the stator and rotor.

[0024] In a preferred embodiment, the peripheral wall of the first balancing part is provided with balancing holes for dynamic balancing correction.

[0025] By setting balancing holes in the first balancing section, the initial imbalance of the rotor is corrected, thereby optimizing the mass distribution of the rotor, improving the balance of rotor rotation, making the motor run stably, reducing bearing wear, and reducing noise.

[0026] In a preferred embodiment, the balance block is a metal component and the fan is a plastic component.

[0027] The balancing holes are made of metal parts such as aluminum alloy and zinc alloy, which have high density. During the dynamic balancing process, large balance corrections can be achieved through drilling, milling and other machining processes, which are fast and efficient. The fans are made of plastic parts, such as PET (polyethylene terephthalate), PPS (polyphenylene sulfide), and nylon (polyamide), which reduces material costs. At the same time, fine balance corrections can be achieved through drilling, milling and other machining processes during the dynamic balancing process. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of the motor in one embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the fan structure in one embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram showing the cooperation of the rotor, balance block, and fan in one embodiment of the present invention.

[0032] List of components and reference numerals:

[0033] 10. Stator; 20. Rotor; 21. Shaft; 30. Balance block; 40. Fan; 41. First balancing part; 411. Fixing ring; 412. Outer ring; 413. Balance body; 414. Balance hole; 42. Second balancing part; 421. Ring wall; 422. Extension wall; 423. Noise reduction cavity; 43. Fan blade; 50. Bearing; 60. Upper end cover; 70. Lower end cover. Detailed Implementation

[0034] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0035] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0036] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] In a preferred embodiment, this utility model provides a stable food processing machine, including a crushing device and a motor, such as... Figure 1-3 As shown, the motor includes a stator 10, a rotor 20, a shaft 21 extending from the rotor 20, an upper end cover 60 and a lower end cover 70 fixed to the upper and lower ends of the stator 10. The upper end of the shaft 21 is in transmission cooperation with the crushing device. The motor also includes a balance block 30 disposed above the rotor 20 and a fan 40 disposed below the rotor 20. The density of the fan 40 is less than the density of the balance block 30. Figure 2 As shown, the fan 40 includes an integrally formed first balancing part 41, a second balancing part 42, and fan blades 43. The first balancing part 41 is close to the rotor 20 and is disposed opposite to the balancing block 30. The second balancing part 42 extends downward from the lower end of the first balancing part 41 and protrudes outward in a radial direction. The fan blades 43 are disposed on the second balancing part 42 and are spaced apart in a circumferential direction.

[0040] It should be noted that the relative arrangement of the first balancing part 41 and the balancing block 30 means that they are located at two positions symmetrical to the rotor. This includes the complete symmetry of the structure of the first balancing part 41 and the balancing block 30, as well as the near symmetry of the structure of the first balancing part 41 and the balancing block 30. For example, the first balancing part 41 and the balancing block 30 are symmetrical in their initial state before the rotor dynamic balancing correction process. The slight differences that occur during drilling and milling in the dynamic balancing correction process still belong to the relative arrangement of the first balancing part 41 and the balancing block 30.

[0041] This utility model provides a stable food processing machine. The motor includes a balance block 30 disposed above the rotor 20 and a fan 40 disposed below the rotor 20. The density of the fan 40 is less than that of the balance block 30, thus reducing the material cost of the fan 40. By machining or counterweighting the first balancing part 41 and the second balancing part 42 of the fan 40, the motor's dynamic balance calibration is achieved. Compared to the balance block 30, which uses high-density, high-cost materials, material cost savings are achieved, thus reducing costs. Simultaneously, because the density of the fan is less than that of the balance block, the adjustment precision and range of the fan and the balance block are differentiated. For example, drilling a balance hole in the less dense fan allows for a smaller range of gravity adjustment compared to drilling the same hole in the denser balance block, resulting in a more precise adjustment range. Therefore, for situations requiring small-amplitude balance correction, correction via the fan offers higher adjustment accuracy than using the balance block. Thus, using the balance block for large-amplitude balance adjustments and the fan for small-amplitude balance adjustments makes dynamic balance adjustment easier and more precise. Based on this, the fan 40 includes an integrally formed first balancing part 41, a second balancing part 42, and fan blades 43. The first balancing part 41 is close to the rotor 20 and is disposed opposite to the balancing block 30. The first balancing part 41 and the balancing block 30 form an equivalent structure, which facilitates the synchronous balancing calibration operation of the two during the dynamic balancing correction process and simplifies the balancing calibration operation. Since the density of the first balancing part 41 is less than that of the balancing block 30, there will be a mass difference when the two structures are equivalent. Therefore, the second balancing part 42 extends downward from the lower end of the first balancing part 41 and protrudes outward in the radial direction. By extending downward, it compensates for part of the mass difference with the balancing block 30 in the axial direction. By protruding outward in the radial direction, it continues to compensate for part of the mass difference with the dynamic balancing block 30 in the radial direction. The fan blades 43 are disposed on the second balancing part 42 and are spaced apart in the circumferential direction to further compensate for part of the mass difference with the dynamic balancing block 30, and at the same time form a correction of rotational balance. Therefore, the axial and radial extension design of the second balancing part 42, relative to the first balancing part 41, greatly reduces the mass difference between the balancing blocks 30 of different densities and the integrated fan 40, reduces the initial imbalance of the rotor 20, and makes the initial sway of the upper and lower parts of the rotor 20 more consistent. Thus, the imbalance can be quickly corrected during dynamic balancing, achieving balanced operation of the rotor 20, improving motor vibration, and reducing rotational noise.

[0042] like Figure 3As shown, in a preferred embodiment, the second balancing part 42 includes an annular wall 421 connected to the lower edge of the first balancing part 41 and an extension wall 422 extending radially outward from the lower end of the annular wall 421, with a noise reduction cavity 423 formed inside the annular wall 421. More preferably, the first balancing part 41 includes a fixed ring 411 sleeved on the rotating shaft 21, an outer ring 412 spaced around the fixed ring 411, and a balancing body 413 connected between the fixed ring 411 and the outer ring 412, with the annular wall 421 connected to the lower end of the outer ring 412.

[0043] By setting the second balancing section 42 as an annular wall 421, the uneven mass distribution with the balance block 30 is eliminated along the axial direction, achieving a balancing effect similar to a balancing ring. This allows for more flexible and effortless balancing of the rotor 20's rotation, correcting runout. Simultaneously, a noise reduction cavity 423 is formed inside the annular wall 421, reducing the outward transmission of noise during motor operation and achieving noise reduction. By setting the extension wall 422, the uneven mass distribution with the balance block 30 is eliminated radially, reducing the initial imbalance of the rotor 20.

[0044] By superimposing and cooperating the fixed ring 411, the outer ring 412 that is spaced around the fixed ring 411, and the balance body 413 that connects the fixed ring 411 and the outer ring 412, the first balance part 41 itself achieves the purpose of balance adjustment. At the same time, the outer ring 412 or the balance body 413 is used as a mechanical machining correction position. The structure is simple and convenient for dynamic balance correction. The ring wall 421 is connected to the lower end of the outer ring 412, which can generate a larger balancing torque at a larger radius, making balance correction less labor-intensive and improving the balance effect of motor operation.

[0045] Of course, it should be noted that the specific structure of the second balancing part of this utility model is not limited to the one described above. In other embodiments, the second balancing part may only include annular wall 421 and extension wall 422 connected to the edge of the first balancing part.

[0046] like Figure 3 As shown, in a preferred embodiment, the lower end of the rotating shaft 21 extends into the noise reduction cavity 423 and is connected to a bearing 50, which is at least partially located within the noise reduction cavity 423. More specifically, a bearing chamber is provided in the lower end cover 70, and the bearing 50 is fixed within the bearing chamber.

[0047] By placing the bearing 50 at least partially within the noise reduction cavity 423, it is equivalent to the bearing 50 and the ring wall 421 sharing a common height space, which helps to reduce the overall height of the motor, lower the center of gravity, improve the balance and stability of operation, and also realize the miniaturization of the food processing machine; the noise generated at the mating position of the shaft 21 and the bearing 50 can be weakened by the noise reduction cavity 423, achieving a better noise reduction effect.

[0048] like Figure 3As shown, in a preferred embodiment, the fan blade 43 protrudes from the side of the extension wall 422 facing the stator 10, and a gap S1 is provided between the fan blade 43 and the annular wall 421.

[0049] By protruding the fan blade 43 on the side of the extension wall 422 facing the stator 10, the fan blade 43 is close to the stator 10, driving the airflow to directly exchange heat with the stator 10, thereby achieving rapid heat dissipation of the motor. By setting a gap between the fan blade 43 and the ring wall 421, a pressure difference is formed at the gap when the fan 40 rotates. The fan blade 43 drives the airflow to be smoothly drawn into the gap from the mating seam between the stator 10 and the rotor 20 along the axial direction, and then thrown out along the radial direction of the fan blade 43, thereby achieving efficient heat dissipation of the stator 10 coils and the like.

[0050] like Figure 2 As shown, in a preferred embodiment, the fan blade 43 extends away from the pivot 21 and its thickness gradually decreases.

[0051] By setting the fan blade 43 to a structure with a gradually decreasing thickness away from the shaft 21, the center of gravity of the fan blade 43 is centered, improving the alignment with the shaft 21, preventing the fan blade 43 from shaking or tilting, reducing the inertial resistance during startup, making it easier for the fan 40 to reach a stable speed, and contributing to the smooth rotation of the rotor 20 and the shaft 21.

[0052] like Figure 1 As shown, in a preferred embodiment, the stator 10 is provided with a receiving cavity for accommodating the rotor 20, the first balancing part 41 extends into the receiving cavity, and the second balancing part 42 is located outside the receiving cavity and blocks the annular gap S2 formed between the first balancing part 41 and the receiving cavity.

[0053] Since there is a mating seam between the rotor 20 and the stator 10, and the first balancing part 41 extends into the receiving cavity to form a mating seam with the stator, when the fan 40 rotates, it will drive the airflow to flow and dissipate heat along the mating seam, which will also bring wind noise. Therefore, by having the second balancing part 42 located outside the receiving cavity and blocking the annular gap formed between the first balancing part 41 and the receiving cavity, the direct transmission of heat dissipation noise can be blocked and reduced, thereby reducing heat dissipation noise.

[0054] In a preferred embodiment, the fan blade 43 is located on the side of the second balancing portion 42 facing the stator 10 and extends below the annular gap.

[0055] The fan blade 43 is located on the side of the second balance part 42 facing the stator 10 and extends below the annular gap. During rotation, it directly drives the airflow to flow smoothly through the annular gap, realizing rapid airflow circulation and enabling rapid cooling of the stator 10 and rotor 20.

[0056] like Figure 2As shown, in a preferred embodiment, the peripheral wall of the first balancing part 41 is provided with a balancing hole 414 for dynamic balancing correction.

[0057] By setting a balancing hole 414 in the first balancing section 41, the initial imbalance of the rotor 20 is corrected, thereby optimizing the mass distribution of the rotor 20, improving the rotational balance of the rotor 20, making the motor run stably, reducing bearing 50 wear, and reducing noise. Of course, in practice, rotor dynamic balancing can also be performed by milling.

[0058] In a preferred embodiment, the balance block 30 is a metal part and the fan 40 is a plastic part.

[0059] The balance hole 414 uses metal parts such as aluminum alloy and zinc alloy, which have high density. During the dynamic balancing process, a large balance amount correction can be achieved through drilling, milling and other processing, which is fast and efficient. The fan 40 uses plastic parts, such as PET (polyethylene terephthalate), PPS (polyphenylene sulfide), and nylon (polyamide), which reduces material costs. At the same time, it can achieve fine balance amount correction through drilling, milling and other processing during the dynamic balancing process.

[0060] It should be noted that this utility model does not limit the form of the food processing machine. For example, in a preferred embodiment, the food processing machine is a head-type soy milk maker, which includes a grinding cup and a head that is fastened to the mouth of the grinding cup. The motor is located inside the head and the rotating shaft extends from the lower end of the head and is connected to the grinding device, which is a grinding blade.

[0061] In another preferred embodiment, the food processing machine includes a main unit and a grinding cup fixedly mounted on the main unit. The motor is located inside the main unit, and the rotating shaft passes through the bottom wall of the grinding cup and is connected to a grinding device located inside the grinding cup. The grinding device is a grinding blade, or the grinding device includes a moving grinding head connected to the rotating shaft and a stationary grinding head that is sleeved and fitted with the moving grinding head.

[0062] In another preferred embodiment, the food processor includes a pulverizing cup detachably mounted on the main unit, a motor housed within the main unit, and a pulverizing device consisting of pulverizing blades. The blade shaft of the pulverizing blades is connected to the motor's rotating shaft via a connector. Alternatively, in this embodiment, the motor and pulverizing device can be driven remotely. Specifically, a drive disk is mounted above the rotating shaft, and the pulverizing device includes a driven disk, pulverizing blades, and a transmission shaft connecting the driven disk and the pulverizing blades. The drive disk remotely drives the driven disk to rotate.

[0063] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0064] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0065] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A stable food processing machine, comprising a crushing device and a motor, the motor comprising a stator, a rotor, and a rotating shaft extending from the rotor, the upper end of the rotating shaft being in transmission engagement with the crushing device, characterized in that, The motor also includes a balance block disposed above the rotor and a fan disposed below the rotor. The density of the fan is less than the density of the balance block. The fan includes an integrally formed first balance part, a second balance part, and fan blades. The first balance part is close to the rotor and disposed opposite to the balance block. The second balance part extends downward from the lower end of the first balance part and protrudes outward in a radial direction. The fan blades are disposed on the second balance part and are spaced apart in a circumferential direction.

2. The food processing machine with stable operation according to claim 1, characterized in that, The second balancing part includes an annular wall connected to the lower edge of the first balancing part and an extension wall extending radially outward from the lower end of the annular wall, wherein a noise reduction cavity is formed on the inner side of the annular wall.

3. The food processing machine with stable operation according to claim 2, characterized in that, The first balancing part includes a fixed ring sleeved on the rotating shaft, an outer ring spaced around the fixed ring, and a balancing body connected between the fixed ring and the outer ring, wherein the ring wall is connected to the lower end of the outer ring.

4. The food processing machine with stable operation according to claim 2, characterized in that, The lower end of the rotating shaft extends into the noise reduction cavity and is connected to a bearing, the bearing being at least partially located within the noise reduction cavity.

5. A food processing machine with stable operation according to claim 2, characterized in that, The fan blade protrudes from the side of the extension wall facing the stator, and a gap is provided between the fan blade and the annular wall.

6. The food processing machine with stable operation according to claim 1, characterized in that, The fan blades extend away from the axis of rotation and gradually decrease in thickness.

7. The food processing machine with stable operation according to claim 1, characterized in that, The stator is provided with a receiving cavity to accommodate the rotor. The first balancing part extends into the receiving cavity, and the second balancing part is located outside the receiving cavity and blocks the annular gap formed between the first balancing part and the receiving cavity.

8. A food processing machine with stable operation according to claim 7, characterized in that, The fan blades are located on the side of the second balancing section facing the stator and extend below the annular gap.

9. A food processing machine with stable operation according to claim 1, characterized in that, The peripheral wall of the first balancing part is provided with balancing holes for dynamic balancing correction.

10. A food processing machine with stable operation according to claim 1, characterized in that, The balance block is made of metal, and the fan is made of plastic.

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