Food processor driven by variable frequency

Abstract

The utility model relates to a variable-frequency driving food processor, which comprises a cup body, a cup cover, a driving mechanism, a driving mechanism, a driving mechanism and a driving mechanism, and is characterized in that the cup body comprises a bottom; the knife assembly is arranged in the cup body; the heating piece is arranged in the bottom; the rotor assembly comprises a rotor shaft which penetrates through the bottom of the cup body and is in transmission connection with the cutter assembly; the motor shell comprises an upper end plate covering the rotor assembly, the upper end plate is integrally formed on the outer side of the bottom, and a first clamping part is formed on the motor shell; the stator assembly is arranged in the motor shell and arranged around the periphery of the rotor assembly, the stator assembly comprises a stator and a framework clamped outside the stator, and a second clamping part is formed on the side, away from the stator, of the framework; wherein one of the first clamping part and the second clamping part is a clamping groove, the other one of the first clamping part and the second clamping part is a protrusion, and at least part of the clamping groove is arranged in a closed mode in the circumferential direction. According to the technical scheme, normal work of a transmission system is effectively guaranteed, and the coaxiality is high.

Description

Technical Field

[0001] This utility model relates to the field of food processing machine technology, and in particular to a variable frequency drive food processing machine. Background Technology

[0002] With the development of food processing machines, people are gradually pursuing a higher quality user experience. Traditional food processing machines, based on product pricing constraints and simple drive requirements, often use series motors. However, series motors suffer from various problems such as large fluctuations in motor transmission efficiency, low axial heat dissipation efficiency, large frame size, and significant noise. To solve these problems, conventional technical concepts have been gradually broken, and brushless motors have begun to be adopted. Generally, a brushless motor includes a motor housing, a stator assembly, and a rotor assembly. The motor housing includes two end covers that fit together. The upper end cover includes an upper end plate and an upper side plate. The upper end plate is fixed to the bottom of the food processing machine's cup body to enable the installation of the brushless motor on the food processing machine.

[0003] Application number CN202322295189.9, entitled "A Low-Noise Food Processing Machine," discloses a cup body with an integrally formed upper cover for a permanent magnet brushless motor. A heating element is located at the bottom of the cup body and surrounds the outer periphery of the upper cover. The brushless motor also has a lower cover, and the upper and lower covers together form a mounting cavity for installing the stator and rotor assemblies. The upper and lower covers are locked together. However, the technical problem with this solution is that, although the entire transmission system from the motor to the pulverizing blade is reduced in size due to the assembly relationship, shortening the power transmission path and improving the coaxiality of the transmission system, the stator of the brushless motor is mostly cylindrical and has a relatively smooth surface. When the motor rotates, the stator is subjected to electromagnetic force, and the stator may be driven by the rotor, resulting in circumferential rotation of the stator, making it difficult to ensure the normal operation of the motor.

[0004] Based on the problem of stator anti-rotation, application number CN202221913998.0, entitled "A Brushless Motor", discloses the structure of an inner rotor and an outer stator. The stator core has an upper frame and a lower frame fixedly connected. The upper frame has an upper convex block, and the upper cover (upper end cover) has an upper notch groove that engages with the upper convex block to prevent deflection between the upper frame and the upper cover. Alternatively, the lower frame has a lower convex block, and the lower cover has a lower notch groove that engages with the lower convex block to prevent deflection between the lower frame and the lower cover, thereby achieving circumferential anti-rotation of the stator. However, the technical problems with this solution are as follows: Since the upper cover is an independent component relative to the main housing of the gas nail gun, the upper cover and the main housing (cup) need to be assembled and connected, and the upper and lower covers of the motor also need to be assembled and connected. There are multiple assembly points, and the vibration frequencies between multiple assembly points are easily superimposed, which aggravates resonance noise. In addition, the power transmission path of the transmission system is also long, which greatly reduces the coaxiality. Furthermore, since the notch is set in an open manner on the outer surface of the upper and lower covers, when this machine with a separate main housing and upper cover is working, due to its strong resonance, it is easy for the convex block and the notch to produce relative radial displacement. The cover and the frame may separate or be misaligned, which still makes it difficult to guarantee the anti-rotation function of the stator, thus making it difficult to guarantee the normal operation of the transmission system, and also affecting the coaxiality of the transmission system.

[0005] The above-disclosed technical solutions all have the following technical problems: the end cover of the motor housing and the frame set outside the stator may have radial relative displacement, which makes it difficult to ensure the normal operation of the transmission system and affects the coaxiality of the transmission system. Utility Model Content

[0006] The purpose of this utility model is to provide a variable frequency drive food processing machine to solve the technical problem that the end cover of the motor housing and the frame set outside the stator may have radial relative displacement, making it difficult to ensure the normal operation of the transmission system and affecting the coaxiality of the transmission system.

[0007] To solve the above-mentioned technical problems, this utility model provides a variable frequency drive food processing machine, comprising:

[0008] The cup body includes a bottom, the inner side of which forms the inner wall of the cup body for holding food.

[0009] The blade assembly is disposed within the cup body;

[0010] The heating element is installed inside the bottom.

[0011] The rotor assembly includes a rotor shaft that passes through the bottom and is drively connected to the blade assembly;

[0012] The motor housing includes an upper end plate covering the rotor assembly, the upper end plate being integrally formed on the outer side of the bottom, and a first snap-fit ​​portion being formed on the motor housing;

[0013] A stator assembly is installed inside the motor housing and arranged around the outer periphery of the rotor assembly. It includes a stator and a frame clamped outside the stator. A second snap-fit ​​portion is formed on the side of the frame away from the stator.

[0014] In this configuration, one of the first and second latching portions is a latching groove, and the other is a protrusion; at least a portion of the latching groove is circumferentially closed.

[0015] Preferably, the motor housing further includes a side plate arranged circumferentially around the bottom, and the first snap-fit ​​portion is disposed between the bottom and the side plate.

[0016] Preferably, the inner wall of the side plate is attached to one of the sides of the protrusion.

[0017] Preferably, the motor housing further includes a side plate arranged circumferentially around the bottom, and the side plate has the first snap-fit ​​portion formed thereon.

[0018] Preferably, a protrusion protruding from the inner sidewall is formed on the side plate, and the first snap-fit ​​portion is formed on the protrusion along the axial direction.

[0019] Preferably, the cup body includes a cup body and a heating plate, the heating element is embedded in the heating plate, the upper end plate is integrally formed on the heating plate, and the first snap-fit ​​portion is formed at the bottom of the heating plate.

[0020] Preferably, one of the frame and the bottom has a thickened portion extending axially, the slot has a first groove formed by the thickened portion being recessed inward, and / or, the slot has a second groove formed by the one of the frame and the bottom being recessed inward.

[0021] Preferably, the card slot has a first slot and a second slot communicating with the first slot, one side of the first slot is connected to the outside, and the second slot is closed in the circumferential direction.

[0022] Preferably, one of the skeleton and the bottom is provided with the thickened portion, and the thickened portion is provided in multiple spaced intervals along the circumference. A rib is provided between two adjacent thickened portions, and the thickened portion protrudes radially from the rib.

[0023] Preferably, the protrusion has a protrusion extending outward along the axial direction and a narrowed portion recessed toward the side of the protrusion, the protrusion being inserted into the slot, and the bottom of the narrowed portion abutting against one of the frame and the bottom.

[0024] The beneficial effects of this utility model are:

[0025] 1. This utility model provides a variable frequency drive food processing machine in which the upper end plate is integrally formed on the outer side of the bottom. In other words, the upper end plate and the cup body form a non-removable whole, eliminating assembly points between the upper end plate and the bottom, reducing the source of resonance. Even under high-speed pulverization conditions, when the blade assembly violently cuts and collides with the material, the reduced resonance of the entire machine makes it less prone to shaking. This also prevents the first and second locking parts from easily disengaging, effectively ensuring the anti-rotation effect on the stator. Furthermore, when this machine, with its highly integrated motor housing and cup body, is operating, due to the overall... The resonance is reduced, and because at least part of the slot is circumferentially sealed, a fixed protrusion is inserted into the slot. Whenever the protrusion tends to move radially, the circumferentially sealed part of the slot can exert a reverse force on the protrusion, which can firmly hold the protrusion and limit the radial displacement of the protrusion. This further improves the stability of the frame holding the stator assembly and avoids radial disturbance of the rotor assembly that interacts with the stator assembly. That is, the rotor shaft is also difficult to generate radial disturbance, ensuring coaxiality. This ensures the normal operation of the transmission system, making the cutter assembly connected to the rotor shaft drive stable in cutting, cutting the material more evenly, and greatly improving the crushing rate.

[0026] 2. The motor housing also includes a side plate arranged circumferentially around the bottom. A first snap-fit ​​part is located between the bottom and the side plate. The inner side of the side plate is one side of the first snap-fit ​​part. The lower end of the bottom can form the top of the first snap-fit ​​part. The first snap-fit ​​part is directly formed on the cup body, further reducing assembly points and thus reducing the source of resonance. This significantly improves the stability of the first and second snap-fit ​​parts' insertion and engagement, making them less prone to loosening, and thus more effectively improving the anti-rotation effect on the stator assembly. Secondly, since the inner sidewall of the side plate is attached to one side of the protrusion, when the protrusion and the slot have a tendency to move radially relative to each other during startup, the inner side of the side plate has a attaching effect on the protrusion, making the installation between the motor housing and the frame more stable. This effectively avoids radial disturbance of the rotor shaft, thereby making the material cut more uniformly by the blade assembly and greatly improving the crushing rate.

[0027] 3. Because the card slot has a first slot and a second slot connected to the first slot, one side of the first slot is connected to the outside, and the second slot is closed in the circumferential direction, the card slot is formed by two overlapping slots, which can increase the depth of the card slot, thereby increasing the insertion depth of the protrusion in the card slot and increasing the contact area between the protrusion and the card slot; when the food processing machine is working and twists in the circumferential direction, the anti-torsion strength of the protrusion is improved, thereby making the protrusion less prone to breakage and ensuring the reliability of the fit between the bottom and the upper frame.

[0028] 4. By setting raised ribs that connect adjacent thickened sections, the width of the raised ribs is smaller than the width of the thickened sections. The raised ribs enhance the circumferential structural strength of the thickened sections, reducing the possibility of breakage due to mutual torsion during the fit between the protrusions and the thickened sections. When the thickened sections are directly placed on the bottom, the shaking of the entire machine during high-speed crushing is reduced. Combined with the circumferential structural strength of the thickened sections provided by the raised ribs, the protrusions and slots become more stable during the fit, less prone to loosening, and improve the anti-rotation effect on the stator assembly. Attached Figure Description

[0029] 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.

[0030] Figure 1 This is a cross-sectional schematic diagram of a frequency-driven food processing machine according to one embodiment of the present invention.

[0031] Figure 2 for Figure 1 An enlarged schematic diagram of point A shown.

[0032] Figure 3 for Figure 1 The diagram shows the structure of the upper end plate and upper side plate of the motor housing.

[0033] Figure 4 for Figure 3 An enlarged schematic diagram of point B shown.

[0034] Figure 5 for Figure 1 The diagram shows the structure of the stator assembly.

[0035] The names of the components shown in the diagram are as follows:

[0036] 1. Cup body; 11. Bottom; 111. Heating element; 2. Knife assembly; 3. Stator assembly; 31. Stator; 32. Frame; 321. Second snap-fit ​​part; 3211. Protrusion; 3212. Narrowing part; 4. Rotor assembly; 41. Rotor shaft; 5. Motor housing; 51. Inner cavity; 52. First snap-fit ​​part; 53. Upper end plate; 54. Upper side plate; 55. Thickened part; 551. First slot; 552. Second slot; 56. Rib; 57. Lower end plate; 58. Lower side plate. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] In one embodiment, see Figures 1-5 This embodiment discloses a variable frequency drive food processor, including a cup body 1, a blade assembly 2, and a variable frequency motor assembly. The variable frequency motor assembly includes a stator assembly 3, a rotor assembly 4, and a motor housing 5. The food processor in this application can be a blender, a soy milk maker, etc.

[0039] The cup body 1 includes a bottom 11, the inner side of which forms the inner wall for holding food; a knife assembly 2 disposed inside the cup body 1; a heating element 111 installed inside the bottom 11; a rotor assembly 4 including a rotor shaft 41 passing through the bottom 11 and being drivenly connected to the knife assembly 2; a motor housing 5 including an upper end plate 53 covering the rotor assembly 4, the upper end plate 53 being integrally formed on the outer side of the bottom 11, and a first snap-fit ​​portion 52 formed on the motor housing 5; a stator assembly 3 disposed inside the motor housing 5 and arranged around the outer periphery of the rotor assembly 4, including a stator 31 and a frame 32 clamping the stator 31, the frame 32 having a second snap-fit ​​portion 321 formed on the side away from the stator 31; wherein, one of the first snap-fit ​​portion 52 and the second snap-fit ​​portion 321 is a slot and the other is a protrusion, and at least part of the slot is closed in the circumferential direction.

[0040] It should be noted that the heating element 111 can be arranged around the outer periphery of the upper end plate 53, or it can be arranged at other positions on the bottom 11. The heating element 111 is used to heat the food inside the cup body 1 (e.g., simmering). The arrangement only needs to ensure efficient heating of the food. The heating element 111 can be a heating tube, which can be arranged in a single-ring shape. The blade assembly 2 is used to crush and stir materials such as beans, vegetables, and fruits. The slot needs to be designed to be at least partially circumferentially closed. The slot can be completely circumferentially closed, or only a part of the slot can be closed circumferentially.

[0041] It is understandable that the upper end plate 53 is integrally formed on the outside of the bottom 11. That is to say, the upper end plate 53 and the cup body 1 form a non-removable whole, eliminating the assembly point between the upper end plate 53 and the bottom 11, reducing the source of resonance. Under high-speed crushing conditions, even if the blade assembly 2 and the material have a violent cutting collision, the resonance generated by the whole machine is weakened, making it less likely for the whole machine to shake. This makes it less likely for the first locking part 52 and the second locking part 321 to detach, effectively ensuring the anti-rotation effect on the stator 31. Furthermore, when this highly integrated machine of motor housing 5 and cup body 1 is in operation, the resonance of the whole machine is reduced, and at least part of the slot is circumferentially sealed. The slot is used to insert and fix the protrusion. Whenever the protrusion tends to move radially, the circumferentially sealed part of the slot can give the protrusion a reverse force, which can firmly hold the protrusion and limit the radial displacement of the protrusion. This further improves the stability of the frame 32 in holding the stator assembly 3, avoids radial disturbance of the rotor assembly 4 that interacts with the stator assembly 3, and makes it difficult for the rotor shaft 41 to generate radial disturbance, thus ensuring coaxiality and ensuring the normal operation of the transmission system. This makes the cutter assembly 2, which is connected to the rotor shaft 41, cut the material more evenly and greatly improve the crushing rate.

[0042] Specifically, such as Figure 1 As shown, the cup body 1 includes a cup body and a heating plate. The cup body can be a glass body, and the heating plate can be a cast aluminum heating plate. The lower end of the cup body is sealed to the heating plate, and the heating tube is die-cast into the heating plate. The heating element 111 is embedded in the heating plate, and the upper end plate 53 is integrally formed on the heating plate, realizing the reuse of the heating plate. The heating plate is directly assembled with the lower end plate 57 and the side plate, which can eliminate the assembly between the heating plate and the upper end plate 53, reduce the superposition value of the vibration frequency between the assembly points, and thus reduce resonance. When the first locking part 52 is formed at the bottom of the heating plate, it can prevent the first locking part 52 and the second locking part 321 from easily loosening, effectively ensuring the anti-rotation effect on the stator 31, and thus ensuring the normal operation of the transmission system.

[0043] It should be noted that multiple protrusions can be provided, and the number of slots corresponds to the number of protrusions. The motor housing 5 also has a lower end plate 57, and the upper end plate 53 and the lower end plate 57 are assembled vertically, forming an inner cavity 51 together with the side plates. The motor housing 5 also includes side plates arranged circumferentially around the bottom 11. The side plates include an upper side plate 54 and a lower side plate 58. The upper side plate 54 is arranged around the outer periphery of the upper end plate 53, and the upper side plate 54 and the upper end plate 53 are integrally formed, that is, the bottom 11 of the cup body 1 is integrally formed with the upper side plate 54; the lower side plate 58 is arranged around the outer periphery of the lower end plate 57, and the lower side plate 58 and the lower end plate 57 are integrally formed. The upper side plate 54 and the lower side plate 58 are fixed together by bolts to fix the lower end plate 57 to the bottom 11. There are two frames 32, namely an upper frame 32 and a lower frame 32. The bottom 11 and the upper frame 32 can be connected by a slot and a protrusion; or, the lower end plate 57 and the lower frame 32 can be connected by a slot and a protrusion; or, the upper side plate 54 and the upper frame 32 can be connected by a slot and a protrusion; or, the lower side plate 58 and the lower frame 32 can be connected by a slot and a protrusion; or, a first engaging portion 52 can be provided between the bottom 11 and the upper side plate 54, and a second engaging portion 321 on the upper frame 32 can be engaged with the first engaging portion 52, etc. In some embodiments, the side plate can also be arranged circumferentially around the bottom 11, and the side plate can be detachably connected to the lower end plate 57, that is, only one side plate is provided.

[0044] In one embodiment, the upper end plate 53 and the upper frame 32 are connected by a slot and a protrusion.

[0045] The second card connector 321 can be located in three different positions, as follows:

[0046] In one embodiment, such as Figures 1-3 As shown, the first latching portion 52 is disposed between the bottom 11 and the side plate. Specifically, the first latching portion 52 is disposed between the bottom 11 and the upper side plate 54, and the inner sidewall of the side plate is abutted against one side of the protrusion. It should be noted that regardless of whether the protrusion is the first latching portion 52 or the second latching portion 321, one side of the protrusion can abut against the inner sidewall of the side plate. When the protrusion is the first latching portion 52, the inner side of the side plate is one side of the first latching portion 52; when the protrusion is the second latching portion 321, the inner side of the side plate abuts against one side of the first latching portion 52.

[0047] It is understandable that the inner side of the upper side plate 54 is one side of the first snap-fit ​​part 52, and the lower end of the bottom 11 forms the top of the first snap-fit ​​part 52. The first snap-fit ​​part 52 is directly formed on the cup body 1. By eliminating the assembly point between the upper end plate 53 and the bottom 11, the source of resonance is reduced, which significantly improves the stability of the insertion and engagement of the first snap-fit ​​part 52 and the second snap-fit ​​part 321. The two are not easy to loosen, which further improves the anti-rotation effect on the stator assembly 3. Secondly, since the inner side wall of the upper side plate 54 is attached to one side of the protrusion, when the protrusion and the slot have a tendency to move radially relative to each other during startup, the inner side of the upper side plate 54 has a attaching effect on the protrusion, which makes the installation between the motor housing 5 and the frame 32 more stable, effectively avoiding radial disturbance of the rotor shaft 41, thereby making the material cut by the blade assembly 2 more uniform and greatly improving the crushing rate. Furthermore, given the same structural strength of the first snap-fit ​​portion 52, this embodiment's arrangement of the first snap-fit ​​portion 52 between the bottom 11 and the upper side plate 54 allows for a thinner first snap-fit ​​portion 52 compared to other arrangements, reducing its space occupation within the inner cavity 51 and thus decreasing the volume of the inner cavity 51.

[0048] In one embodiment, not shown in the figure, the side plate is provided with the first engaging portion 52. Specifically, the first engaging portion 52 is formed on the lower end of the upper side plate 54 away from the bottom 11; alternatively, the first engaging portion 52 can be formed on the inner wall surface of the upper side plate 54. In this embodiment, if the first engaging portion 52 is a slot, a protrusion can be formed on the inner wall surface of the upper side plate 54, and the protrusion is recessed axially to form the slot.

[0049] In one embodiment, such as Figures 3-4 As shown, in this embodiment, one of the upper skeleton 32 and the bottom 11 extends outward along the axial direction with a thickened portion 55, the slot has a first groove 551 formed by the thickened portion 55 being recessed inward, and the slot also has a second groove 552 formed by the one of the skeleton 32 and the bottom 11 being recessed inward.

[0050] Specifically, the first engaging portion 52 is the slot, and the second engaging portion 321 is the protrusion. The bottom 11 extends outward along the axial direction with a thickened portion 55. The slot has a first groove 551 formed by the inward recess of the thickened portion 55, and a second groove 552 formed by the inward recess of the lower end face of the bottom 11. The first groove 551 and the second groove 552 are connected. One side of the first groove 551 is connected to the outside, and the second groove 552 is closed in the circumferential direction.

[0051] The first slot 551 is open, having an opening in the circumferential direction; the second slot 552 is closed in the circumferential direction. Part of the side of the first slot 551 is the inner wall surface of the upper side plate 54, and the same applies to the second slot 552. The slot is formed by two overlapping slots, increasing the depth of the slot and thus increasing the insertion depth of the protrusion within the slot, increasing the contact area between the protrusion and the slot. During operation of the food processing machine, and under circumferential torsion, this increases the anti-torsion strength of the protrusion, making it less prone to breakage and ensuring the reliability of the fit between the bottom 11 and the upper frame 32.

[0052] In a preferred embodiment, the second snap-fit ​​portion 321 is the protrusion, and the first snap-fit ​​portion 52 is the slot. The protrusion and the upper frame 32 are integrally formed, which further improves the structural strength of the protrusion. Moreover, the processing positioning reference can be the same as that of the upper frame 32, reducing the processing process and improving processing accuracy and efficiency.

[0053] In one embodiment, not shown in the figure, the slot can also be configured such that one of the lower ends of the upper frame 32 and the bottom 11 has a thickened portion 55 extending outward along the axial direction, and the slot has a first groove 551 formed by the inward recess of the thickened portion 55.

[0054] In one embodiment, not shown in the figure, the slot may also be configured such that the slot has a second groove 552 formed by the inward recess of one of the lower ends of the upper skeleton 32 and the bottom 11.

[0055] In one embodiment, such as Figure 3 As shown, multiple slots are provided. One of the upper frame 32 and the bottom 11 is provided with a thickened portion 55. Multiple thickened portions 55 are spaced apart circumferentially, and a rib 56 is provided between adjacent thickened portions 55. The thickened portion 55 protrudes radially from the rib 56. It can be understood that the rib 56 connects adjacent thickened portions 55, and the width of the rib 56 is smaller than the width of the thickened portion 55. The rib 56 is used to enhance the circumferential structural strength of the thickened portion 55, reducing the possibility of breakage due to mutual torsion during the mating process. When the thickened portion 55 is directly provided on the bottom 11, the shaking of the entire machine during high-speed crushing is reduced. Combined with the circumferential structural strength of the thickened portion 55 provided by the rib 56, the mating process between the protrusion and the slot is more stable and less prone to loosening, thus improving the anti-rotation effect on the stator assembly 3.

[0056] In one embodiment, such as Figure 5As shown, the protrusion has a protrusion 3211 extending outward along the axial direction and a narrowing portion 3212 recessed towards the side of the protrusion 3211. The protrusion 3211 is inserted into the slot, and the bottom of the narrowing portion 3212 abuts against one of the frame 32 and the bottom 11. It can be understood that the protrusion has two parts from top to bottom. The width of the upper structure along the circumferential direction is smaller than the width of the lower structure along the circumferential direction. The side of the upper structure has a narrowing portion 3212. The upper structure of the protrusion is inserted into the slot, and the narrowing portion 3212 axially limits the protrusion, preventing the protrusion 3211 from breaking when the bottom 11 and the upper frame 32 approach each other excessively along the axial direction.

[0057] 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 variable frequency drive food processing machine, characterized in that, include: The cup body includes a bottom, the inner side of which forms the inner wall of the cup body for holding food. The blade assembly is disposed within the cup body; The heating element is installed inside the bottom. The rotor assembly includes a rotor shaft that passes through the bottom and is drively connected to the blade assembly; The motor housing includes an upper end plate covering the rotor assembly, the upper end plate being integrally formed on the outer side of the bottom, and a first snap-fit ​​portion being formed on the motor housing; A stator assembly is installed inside the motor housing and arranged around the outer periphery of the rotor assembly. It includes a stator and a frame clamped outside the stator. A second snap-fit ​​portion is formed on the side of the frame away from the stator. In this configuration, one of the first and second latching portions is a latching groove, and the other is a protrusion; at least a portion of the latching groove is circumferentially closed.

2. The variable frequency drive food processing machine according to claim 1, characterized in that, The motor housing also includes a side plate arranged circumferentially around the bottom, and the first snap-fit ​​portion is disposed between the bottom and the side plate.

3. The variable frequency drive food processing machine according to claim 2, characterized in that, The inner wall of the side plate is attached to one of the sides of the protrusion.

4. The variable frequency drive food processing machine according to claim 1, characterized in that, The motor housing also includes a side plate arranged circumferentially around the bottom, and the side plate has the first snap-fit ​​portion.

5. The variable frequency drive food processing machine according to claim 4, characterized in that, The side plate has a protrusion that protrudes from the inner sidewall, and the protrusion has the first snap-fit ​​portion formed along the axial direction.

6. The variable frequency drive food processing machine according to claim 1, characterized in that, The cup body includes a cup body and a heating plate. The heating element is embedded in the heating plate, the upper end plate is integrally formed on the heating plate, and the first snap-fit ​​portion is formed at the bottom of the heating plate.

7. The variable frequency drive food processing machine according to any one of claims 1-6, characterized in that, One of the frame and the bottom has a thickened portion extending axially, the slot has a first groove formed by the inward recess of the thickened portion, and / or, the slot has a second groove formed by the inward recess of one of the frame and the bottom.

8. The variable frequency drive food processing machine according to claim 7, characterized in that, The card slot has a first slot and a second slot communicating with the first slot. One side of the first slot is connected to the outside, and the second slot is closed in the circumferential direction.

9. The variable frequency drive food processing machine according to claim 7, characterized in that, One of the frame and the bottom is provided with the thickened portion, and multiple thickened portions are provided at intervals along the circumference. A rib is provided between two adjacent thickened portions, and the thickened portion protrudes radially from the rib.

10. The variable frequency drive food processing machine according to claim 1, characterized in that, The protrusion has a protrusion extending outward along the axial direction and a narrowed portion recessed toward the side of the protrusion. The protrusion is inserted into the slot, and the bottom of the narrowed portion abuts against one of the frame and the bottom.

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