Food processor driven by variable frequency

Abstract

The utility model relates to a food processor driven by variable frequency. The food processor comprises a main machine shell, the knife assembly is arranged outside the main machine shell; the stator assembly is arranged in the main machine shell and comprises a stator and a framework clamped outside the stator, and a first clamping part is formed on the side, away from the stator, of the framework; the rotor assembly is arranged in the stator assembly and comprises a rotor shaft which penetrates through the main machine shell and is in transmission connection with the cutter assembly; the outer shell is arranged in the main machine shell, an inner cavity for installing the stator assembly and the rotor assembly is formed in the outer shell, and a second clamping part matched with the first clamping part in an inserted mode is further formed on the outer shell; 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, the rotor shaft is difficult to generate radial disturbance, the coaxiality is high, and the noise is low.

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 increasingly pursuing a higher quality user experience. Traditional food processing machines, limited by product pricing and simple drive requirements, often use series motors. However, series motors suffer from various problems, including large fluctuations in transmission efficiency, low axial heat dissipation efficiency, large frame size, and significant noise. To address these issues, conventional technical concepts have been broken, and brushless motors have begun to be adopted. However, most existing brushless motor stators have a cylindrical surface with a relatively smooth surface. When the motor rotates, the stator is subjected to electromagnetic forces. If there is no anti-rotation structure between the stator and the housing, the stator may rotate circumferentially.

[0003] Based on the solution to stator anti-rotation, application number CN201811579134.8, entitled "An Improved External Rotor Motor," discloses a structure of an inner stator and an outer rotor, with the end cover filled with a plastic sealant for fixing the stator core. However, the technical problem with this solution is that after the end cover and the stator core are plastic-sealed together, it is difficult to disassemble and repair the stator core, and it is easy to damage the original structure of the end cover and the stator core.

[0004] To address the problem of damage to the original structure of the stator core after the stator stops rotating, 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 has an upper notch 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 that engages with the lower convex block to prevent deflection between the lower frame and the lower cover. However, the technical problems with this solution are as follows: the notches and slots on both the upper and lower covers are located on the outer side, and the notches and slots are open. When working, the convex block and the notch and slot may generate relative radial displacement, which may cause the cover to separate from or deviate from the frame. Significant resonance may occur between the cover and the frame, generating noise and affecting coaxiality, which in turn affects the crushing rate. Moreover, the convex block and the notch and slot are not tightly connected, which may also cause the cover to separate from the frame, posing a certain safety hazard.

[0005] The above-disclosed technical solutions all have the following technical problems: the cover and the frame may have radial relative displacement, which affects the crushing rate and generates a lot of noise; secondly, it is difficult to disassemble and repair the stator core, and it is easy to damage the original mechanism. Utility Model Content

[0006] The purpose of this invention is to provide a variable frequency drive food processing machine to solve the technical problem that the lid and frame may have radial relative displacement, which affects the crushing rate and generates a lot of noise.

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

[0008] Main unit casing;

[0009] The blade assembly is disposed outside the main unit housing;

[0010] A stator assembly is installed inside the main unit housing, including a stator and a frame clamped outside the stator, wherein a first snap-fit ​​portion is formed on the side of the frame away from the stator;

[0011] A rotor assembly, disposed within the stator assembly, includes a rotor shaft passing through the main housing and being kinetically connected to the blade assembly;

[0012] The outer casing is disposed inside the main housing and has an inner cavity for mounting the stator assembly and the rotor assembly. A second snap-fit ​​portion is also formed thereon to engage with the first snap-fit ​​portion.

[0013] 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.

[0014] Preferably, the housing includes an end plate covering the stator assembly and the rotor assembly, and a side wall circumferentially surrounding the end plate, wherein the second snap-fit ​​portion is disposed between the inner end of the end plate and the inner side of the side wall.

[0015] Preferably, the housing includes an end plate covering the stator assembly and the rotor assembly, and a side wall circumferentially surrounding the end plate. The inner end of the end plate is provided with the second snap-fit ​​portion, or the side wall is provided with the second snap-fit ​​portion.

[0016] Preferably, one of the skeleton and the inner end of the end plate 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 skeleton and the inner end of the end plate.

[0017] 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.

[0018] Preferably, one of the skeleton and the end plate 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.

[0019] 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 outer shell.

[0020] Preferably, the height of the stator assembly is H1, the diameter of the stator assembly is D1, and the ratio of H1 to D1 is 0.3-0.8.

[0021] Preferably, the first snap-fit ​​portion is the protrusion, the stator includes a tooth portion with a winding wound, and a yoke portion disposed outside the tooth portion, the skeleton is sleeved outside the tooth portion and the yoke portion, and the protrusion is disposed on the radially outer side corresponding to the tooth portion and above the yoke portion.

[0022] Preferably, the main unit housing has a closed sealed cavity, and a heat dissipation hole is formed through one end of the outer shell, and the inner cavity forms a heat dissipation internal circulation with the sealed cavity through the heat dissipation hole.

[0023] The beneficial effects of this utility model are:

[0024] 1. This utility model provides a variable frequency drive food processing machine, which uses a stator assembly installed inside the main housing. The stator assembly includes a stator and two frames clamped outside the stator. One of the two frames forms a first engaging portion, and a second engaging portion is formed on an outer shell disposed inside the main housing, which engages with the first engaging portion. One of the first and second engaging portions is a slot, and the other is a protrusion. At least part of the slot is closed circumferentially. The rotor shaft passes through the main housing and the outer shell and is connected to the blade assembly for transmission. Based on this, even if the blade assembly causes a violent cutting collision with the material, causing the main housing... The body and outer shell may wobble, but because at least part of the slot is circumferentially sealed, and 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, firmly holding it in place and limiting its radial displacement. This allows the stator assembly held by the frame to be stably positioned, preventing radial disturbance of the rotor assembly that interacts with the stator assembly. In other words, the rotor shaft is also unlikely to generate radial disturbance, ensuring coaxiality. This not only reduces noise and improves safety performance, but also makes the cutter assembly connected to the rotor shaft drive cut more stably, cutting the material more evenly and greatly improving the crushing rate.

[0025] 2. A second snap-fit ​​portion is formed at the inner end of the end plate of the outer shell; or, a second snap-fit ​​portion is formed on the side wall of the outer shell; or, the second snap-fit ​​portion is located between the inner end of the end plate and the inner side of the side wall. The inner side of the side wall can form part of the side of the second snap-fit ​​portion, and the inner end of the end plate forms the top of the second snap-fit ​​portion, which improves the structural strength of the second snap-fit ​​portion. If the second snap-fit ​​portion has a tendency to move radially, the inner side of the side wall has a clamping effect on the second snap-fit ​​portion, making the installation between the outer shell and the frame more stable, effectively avoiding radial disturbance of the rotor shaft, and thus making the material cut by the blade assembly more uniform and greatly improving the crushing rate. Secondly, with the same structural strength of the second snap-fit ​​portion, the thickness of the second snap-fit ​​portion can be made thinner, which can reduce the internal cavity volume.

[0026] 3. Because the slot has a first opening and a second opening connected to the first opening, one side of the first opening is connected to the outside, and the second opening is closed circumferentially, the slot is formed by two overlapping slots, which increases the depth of the slot and thus increases the insertion depth of the protrusion within the slot, increasing the contact area between the protrusion and the slot. When the food processing machine is operating and undergoes circumferential torsion, the torsional strength of the protrusion is improved, making it less prone to breakage and ensuring the reliability of the fit between the outer shell and the frame. Furthermore, the rib connects two adjacent thickened parts, enhancing the circumferential structural strength of the thickened parts and reducing the possibility of breakage due to mutual torsion during the fit between the protrusion and the thickened parts.

[0027] 4. The protrusion has a protrusion extending outward along the axial direction and a narrowing portion recessed towards the side of the protrusion. The protrusion is inserted into a slot, and the bottom of the narrowing portion abuts against one of the frame and the outer shell. 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. The upper structure of the protrusion is inserted into the slot. The narrowing portion has an axial limit on the protrusion to prevent the protrusion from breaking when the outer shell and the upper frame come too close together along the axial direction. Attached Figure Description

[0028] 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.

[0029] Figure 1 This is a cross-sectional schematic diagram of a frequency-driven food processing machine according to one embodiment of the present invention.

[0030] Figure 2 for Figure 1The diagram shows the structure of the lower end cover of the outer casing.

[0031] Figure 3 for Figure 1 The diagram shows a cross-sectional view of the variable frequency motor assembly.

[0032] Figure 4 for Figure 1 The diagram shows the structure of the upper end cover in the outer casing.

[0033] Figure 5 for Figure 4 An enlarged schematic diagram of point A shown.

[0034] Figure 6 for Figure 3 The diagram shows a structural schematic of the stator assembly from one perspective.

[0035] Figure 7 for Figure 3 A schematic diagram of the stator assembly from another perspective.

[0036] The names of the components shown in the diagram are as follows:

[0037] 1. Main unit housing; 11. Sealed cavity; 2. Blade assembly; 3. Stator assembly; 31. Stator; 311. Tooth; 312. Yoke; 32. Frame; 321. First snap-fit ​​part; 3211. Protrusion; 3212. Narrowing part; 4. Rotor assembly; 41. Rotor shaft; 5. Outer housing; 51. Inner cavity; 52. Second snap-fit ​​part; 53. Upper end plate; 54. Upper side wall; 55. Thickened part; 551. First slot; 552. Second slot; 56. Rib; 57. Heat dissipation hole. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] First, the technical concept of the technical solution disclosed in this utility model will be explained.

[0040] In existing brushless motors, the notches and slots on the upper and lower covers are located on the outer side, and are open-type. Because they are used in gas-fired nail guns, which use gas as power to shoot nails onto materials to fix them in place, they are not suitable for applications involving intense crushing vibrations. However, under conditions of intense crushing vibration, the convex block and the notch / slot may experience relative radial displacement, causing the cover and frame 32 to detach or misalign. This results in significant resonance between the cover and frame 32, affecting coaxiality and thus crushing efficiency, and also generating considerable noise. Considering these problems, this invention optimizes the internal structure of the food processing machine, especially the structure of the variable frequency motor.

[0041] The specific solution adopted is as follows:

[0042] In one embodiment, see Figures 1-7 This embodiment discloses a variable frequency drive food processing machine, including a main housing 1, a blade assembly 2, and a variable frequency motor assembly, wherein the variable frequency motor assembly includes a stator assembly 3, a rotor assembly 4, and a housing 5.

[0043] The blade assembly 2 is disposed outside the main housing 1; the stator assembly 3 is disposed inside the main housing 1, and includes a stator 31 and a frame 32 clamped outside the stator 31, wherein a first engaging portion 321 is formed on the side of the frame 32 away from the stator 31; the rotor assembly 4 is disposed inside the stator assembly 3, and includes a rotor shaft 41 that passes through the main housing 1 and is drively connected to the blade assembly 2; the outer shell 5 is disposed inside the main housing 1, and forms an inner cavity 51 for housing the stator assembly 3 and the rotor assembly 4, wherein a second engaging portion 52 is formed thereon to engage with the first engaging portion 321; wherein, one of the first engaging portion 321 and the second engaging portion 52 is a slot and the other is a protrusion, and at least part of the slot is closed in the circumferential direction.

[0044] It is understandable that the food processor can be a soymilk maker, juicer, or blender with high-speed grinding and mixing functions. The blade assembly 2 is used to grind and mix materials such as beans, vegetables, and fruits. The variable frequency motor assembly inside the main housing 1 drives the blade assembly 2 to rotate together via the rotor shaft 41. In this application scenario, the slot needs to be at least partially circumferentially closed. The slot can be completely circumferentially closed, or only a portion of the slot needs to be circumferentially closed.

[0045] When the variable frequency motor assembly starts working, even if the blade assembly 2 experiences violent cutting and collision with the material, causing the main housing 1 to shake, the shaking of the main housing 1 will act on the outer shell 5. However, since at least part of the slot is circumferentially sealed, and 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, firmly holding the protrusion and limiting the radial displacement of the protrusion. This allows the outer shell 5 and the frame 32 to be stably installed, which in turn allows the stator assembly 3 held by the frame 32 to be stably set up, avoiding radial disturbance of the rotor assembly 4 that interacts with the stator assembly 3. That is, the rotor shaft 41 is also unlikely to generate radial disturbance, ensuring coaxiality. This not only reduces noise and improves safety performance, but also makes the blade assembly 2, which is connected to the rotor shaft 41, cut more evenly, greatly improves the crushing rate, and results in a better taste. Secondly, the protrusions and slots make it easy to assemble and disassemble the outer shell 5 and the frame 32, which in turn facilitates the assembly and disassembly of the stator 31 without damaging the components.

[0046] The outer casing 5 includes an end plate covering the stator assembly and the rotor assembly, and a side wall circumferentially surrounding the end plate.

[0047] It should be noted that multiple protrusions can be provided, and the number of slots corresponds to the number of protrusions. The outer shell has an upper end cover and a lower end cover, which are assembled vertically and enclose each other to form an inner cavity 51. There are two frames, 32 of which are an upper frame and a lower frame. The upper end cover and the upper frame can be engaged by inserting a slot and a protrusion, or the lower end cover and the lower frame can be engaged by inserting a slot and a protrusion. The upper end cover includes an upper end plate 53 and an upper side wall 54, and the lower end cover includes a lower end plate and a lower side wall. The upper end plate 53 and the lower end plate are fixed together by bolts to lock the upper end cover and the lower end cover, thereby obtaining the inner cavity 51 for mounting the stator assembly 3 and the rotor assembly 4.

[0048] In one embodiment, such as Figures 3-6 As shown in this embodiment, the upper cover and the upper frame are connected by a slot and a protrusion.

[0049] The second card connector 52 can be located in three different positions, as follows:

[0050] In one embodiment, such as Figures 3-5 As shown, the second snap-fit ​​portion 52 is located between the inner end of the upper end plate 53 and the inner side portion of the upper side wall 54.

[0051] It is understandable that the inner side of the upper sidewall 54 can form part of the side of the second latching part 52, and the inner end of the upper end plate 53 forms the top of the second latching part 52, which improves the structural strength of the second latching part 52. When the main unit starts working, if the second latching part 52 has a tendency to move radially, the inner side of the upper sidewall 54 has a pressing effect on the second latching part 52, so that the housing 5 and the frame 32 can be installed more stably, 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. In addition, under the same structural strength of the second latching part 52, the solution of setting the second latching part 52 between the upper end plate 53 and the upper sidewall 54 in this embodiment can make the thickness of the second latching part 52 thinner than other solutions, which can reduce the volume of the inner cavity 51.

[0052] In one embodiment (not shown in the figure), the outer shell 5 includes an end plate, that is, the upper end cover includes an upper end plate 53, and the inner end of the upper end plate 53 forms the second snap-fit ​​portion 52. Specifically, the lower end of the upper end plate 53 near the upper frame forms the second snap-fit ​​portion 52.

[0053] In one embodiment (not shown in the figure), the upper end cover further includes an upper sidewall 54 circumferentially surrounding the upper end plate 53, and the sidewall is provided with the second snap-fit ​​portion. Specifically, the second snap-fit ​​portion 52 is formed at the lower end of the upper sidewall 54 away from the upper end plate 53; alternatively, the second snap-fit ​​portion 52 can be formed on the inner wall surface of the upper sidewall 54. In this embodiment, if the second snap-fit ​​portion 52 is a slot, a protrusion can be formed on the inner wall surface of the upper sidewall 54, and the protrusion is recessed to form the slot.

[0054] In one embodiment, such as Figures 4-5 As shown, in this embodiment, one of the skeleton 32 and the inner end of the end plate has a thickened portion 55 extending outward along the axial direction. The slot has a first groove 551 formed by the thickened portion 55 being recessed inward. The slot also has a second groove 552 formed by the skeleton 32 and the inner end of the end plate being recessed inward.

[0055] Specifically, the first latching portion 321 is the protrusion, and the second latching portion 52 is the slot. The upper end cover 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 on the inner end face of the upper end cover. 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.

[0056] 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 sidewall 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 it, 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 upper cover and the upper frame.

[0057] In a preferred embodiment, the first snap-fit ​​portion 321 is the protrusion, and the second snap-fit ​​portion 52 is the slot. The protrusion and the upper frame 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, reducing the processing process and improving processing accuracy and efficiency.

[0058] In one embodiment, not shown in the figure, the slot can also be configured such that one of the skeleton 32 and the inner end of the upper plate has a thickened portion 55 extending outward along the axial direction, and the slot has a first groove 551 formed by the thickened portion 55 being recessed inward.

[0059] In one embodiment, not shown in the figure, the slot can also be configured such that the slot has a second groove 552 formed by the inward recess of one of the skeleton 32 and the inner end of the upper end plate.

[0060] In one embodiment, such as Figure 4 As shown, multiple slots are provided. One of the upper frame and the upper end plate 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 and reduce the possibility of breakage due to mutual torsion during the mating process between the protrusion and the thickened portion 55.

[0061] In one embodiment, the first engaging portion 321 is the protrusion. The stator 31 includes a toothed portion 311 with a winding wound around it, and a yoke portion 312 disposed outside the toothed portion 311. The upper skeleton is sleeved on the toothed portion 311 and the yoke portion 312. The protrusion is located radially outward of the toothed portion 311 and above the yoke portion 312. It is understood that the protrusion, located radially outward of the winding, provides good blocking effect on the winding, effectively preventing the winding from moving radially outward due to loosening. Simultaneously, the protrusion is located on the yoke portion 312 corresponding to the toothed portion 311, where the yoke portion 312 has better structural strength, allowing the protrusion to be positioned more stably.

[0062] In one embodiment, such as Figure 6 As 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 either the frame 32 or the upper end cap. 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 upper end cap and the upper frame come too close together axially.

[0063] In one embodiment, such as Figure 3 As shown, the food processing machine can be a portable juicer, with a smaller size. The stator assembly 3 has a height of H1 and a diameter of D1, where H1:D1 is 0.3-0.8. Preferably, H1 is 21.5 mm and D1 is 41.9 mm.

[0064] It is understandable that when H1:D1 is 0.3-0.8, the protrusion of the upper frame and the slot on the upper end cover work together to prevent the stator 31 from rotating. The anti-rotation structure of the stator 31 is set above the stator 31. Compared with the side positioning structure between the stator 31 and the outer shell 5, the diameter of the stator 31 in this embodiment can be set to be smaller. The positioning function of the stator 31 can be achieved without increasing the outer diameter of the stator 31, and the height of the stator assembly 3 will not be set too high, which is more conducive to the flattening of the host.

[0065] When H1:D1 is greater than 0.8, the diameter of stator assembly 3 is too small, which will affect the output torque of the variable frequency motor assembly, resulting in insufficient power transmission from rotor shaft 41 to blade assembly 2. Consequently, blade assembly 2 cannot thoroughly pulverize the material, reducing the pulverization rate and affecting the taste. When H1:D1 is less than 0.3, the diameter of stator assembly 3 is too large, which is not conducive to achieving a flat design for the main unit, and therefore not conducive to portability.

[0066] In one embodiment, such as Figure 2 As shown, the food processor can be a juicer. The main housing 1 has a closed sealed cavity 11. A heat dissipation hole is formed through one end of the outer shell. Specifically, a heat dissipation hole 57 is formed through one of the upper end plate 53 and the lower end plate. The inner cavity 51 forms a heat dissipation internal circulation with the sealed cavity 11 through the heat dissipation hole 57. It can be understood that in this embodiment, the heat dissipation hole 57 is formed through the lower end plate. Since this juicer is a low-pressure portable juicer, the electrical safety hazard is relatively small. The main housing 1 does not have a heat dissipation hole 57 and is a closed cavity. The main housing 1 needs to perform its own heat dissipation protection. The main heat generated in the main unit is generated by the windings on the stator assembly 3. The heat generated by the windings is discharged into the sealed cavity 11 through the inner cavity 51 and the heat dissipation hole 57. Therefore, the inner cavity 51, the heat dissipation hole 57, and the sealed cavity 11 form a heat dissipation internal circulation to prevent the inverter motor assembly from overheating and causing damage to the components.

[0067] 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 processor characterized by, The utility model relates to a motor, including: A main shell; A knife assembly arranged outside the main shell; A stator assembly arranged in the main shell, including a stator and a skeleton clamped outside the stator, a first clamping part is formed on the side of the skeleton away from the stator; A rotor assembly arranged in the stator assembly, including a rotor shaft penetrating through the main shell and being in transmission connection with the knife assembly; An outer shell arranged in the main shell, forming an inner cavity for arranging the stator assembly and the rotor assembly, and a second clamping part is formed on the outer shell and is in plug-in cooperation with the first clamping part; Wherein, one of the first clamping part and the second clamping part is a clamping groove, and the other is a protrusion, and at least part of the clamping groove is arranged in a closed manner in the circumferential direction.

2. The variable frequency drive food processor of claim 1, wherein, The outer shell includes an end plate arranged on the stator assembly and the rotor assembly, and a side wall arranged in a circumferential direction of the end plate, and the second clamping part is arranged between the inner end of the end plate and the inner side of the side wall.

3. The variable frequency drive food processor of claim 1, wherein, The outer shell includes an end plate arranged on the stator assembly and the rotor assembly, and a side wall arranged in a circumferential direction of the end plate, and the second clamping part is arranged between the inner end of the end plate and the inner side of the side wall.

4. The variable frequency drive food processor of claim 2 or 3, wherein, One of the skeleton and the inner end of the end plate extends in an axial direction and has a thickened part, the clamping groove has a first notch formed by the inward recess of the thickened part, and / or the clamping groove has a second notch formed by the inward recess of one of the skeleton and the inner end of the end plate.

5. The variable frequency drive food processor of claim 4, wherein, The clamping groove has the first notch and the second notch in communication with the first notch, one side of the first notch is in communication with the outside, and the second notch is arranged in a closed manner in the circumferential direction.

6. The variable frequency drive food processor of claim 4, wherein, One of the skeleton and the end plate is provided with the thickened part, a plurality of thickened parts are arranged in a spaced manner in the circumferential direction, a protruding rib is arranged between adjacent two thickened parts, and the thickened part protrudes in the radial direction from the protruding rib.

7. The variable frequency drive food processor of claim 1, wherein, The protrusion has a protruding block arranged in an outward extending manner in the axial direction, and a narrowing part recessed towards the side of the protruding block, the protruding block is inserted into the clamping groove, and the bottom of the narrowing part abuts against one of the skeleton and the outer shell.

8. The variable frequency drive food processor of claim 1, wherein, The height of the stator assembly is H1, the diameter of the stator assembly is D1, and H1:D1 is 0.3-0.

8.

9. The variable frequency drive food processor of claim 1, wherein, The first clamping part is the protrusion, the stator includes a tooth part wound with a winding and a yoke part arranged outside the tooth part, the skeleton is sleeved outside the tooth part and the yoke part, the protrusion is arranged on the radial outside corresponding to the tooth part and above the yoke part.

10. The variable frequency drive powered food processor of claim 1, wherein, The main shell has a closed sealed cavity, a heat dissipation hole is formed through one end of the outer shell, and the inner cavity forms an internal heat dissipation circulation with the sealed cavity through the heat dissipation hole.

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