Food processor stable in operation

Abstract

The utility model belongs to the technical field of kitchen appliances, and particularly relates to a stable-operation food processor which comprises a main machine and a smashing cup, a smashing cutter is arranged in the smashing cup, the main machine comprises a shell and a motor, and a rotating shaft of the motor penetrates through the shell top wall of the shell and is in transmission connection with the smashing cutter through a coupler. The shell top wall is integrally provided with a first positioning part located on the upper side and a second positioning part located on the lower side, the first positioning part and the second positioning part are coaxially arranged, the smashing cup and the first positioning part are coaxially arranged and matched in an inserted mode, and the motor and the second positioning part are coaxially arranged and matched in an inserted mode so that the smashing cup and the motor can be coaxially arranged. Due to the fact that the first positioning part and the second positioning part are both located on the shell top wall and are coaxially arranged, the shell top wall of the main machine serves as a unified installation reference for installation of the motor and the smashing cup, the coaxiality of the smashing cup and the motor in the whole machine is improved, the motor concentrically drives the smashing cutter, the smashing cutter operates stably, and working noise is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of kitchen appliances, and in particular relates to a food processing machine with stable operation. Background Art

[0002] Existing food processors include a blending cup and a main unit. The blending cup is generally detachable from the main unit for easy access. For example, the applicant's prior patent application, number 202320553835.4, discloses a reliably assembled food processor comprising a main unit and a crushing cup mounted thereon. The crushing cup is provided with a crushing blade. The main unit includes a motor bracket and a motor disposed below the motor bracket. The motor bracket has a mounting hole, and the motor shaft of the motor is fixedly connected to a lower coupling to drive the crushing blade. The inner diameter of the mounting hole is larger than the maximum outer diameter of the lower coupling. This solution optimizes the installation method of the lower coupling. At the same time, a ring-shaped structure is provided in the mounting hole. The ring-shaped structure is arranged around the motor shaft, which improves the coaxiality between the lower coupling and the motor shaft to a certain extent.

[0003] However, on the one hand, due to the clearance fit between the motor shaft and the annular structure, although the annular structure has a certain correction effect on the runout of the motor shaft, the operation of the motor shaft causes serious wear on the annular structure, and the positioning reliability of the annular structure is poor. The limiting of the annular structure alone is not sufficient to achieve reliable coaxial installation of the motor and the support platform. On the other hand, since the annular structure is independently installed in the mounting hole, that is, the annular structure and the support platform supporting the crushing cup are separately connected, there will be assembly tolerances between the two, and the crushing cup is positioned by the support platform, and the motor shaft is positioned by the annular structure, resulting in inconsistent positioning references of the crushing cup and the motor, poor coaxiality between the crushing cup and the motor, and the motor shaft is not concentric with the crushing knife in the crushing cup. During the operation of the crushing knife, there will be unstable operation and loud noise. Utility Model Content

[0004] The utility model provides a food processing machine with stable operation, which solves the problem that the positioning datums of a grinding cup and a motor are not unified, resulting in poor coaxiality between the grinding cup and the motor and causing loud working noise.

[0005] The utility model provides a food processing machine with stable operation, comprising a main unit and a crushing cup detachably mounted above the main unit, a crushing knife being arranged inside the crushing cup, the main unit comprising a shell and a motor fixed in the shell, the rotating shaft of the motor passing through the top wall of the shell and being connected to the crushing knife via a coupling, the top wall of the shell being integrally provided with a first positioning portion located on the upper side and a second positioning portion located on the lower side, the first positioning portion and the second positioning portion being coaxially arranged, the crushing cup being coaxially arranged and plug-fitted with the first positioning portion, the motor being coaxially arranged and plug-fitted with the second positioning portion, so that the crushing cup and the motor are coaxially arranged.

[0006] The food processing machine provided by the present invention has stable operation. A first positioning portion located on the upper side and a second positioning portion located on the lower side are integrally provided on the top wall of the main body shell, and the first positioning portion is coaxially arranged with the second positioning portion. When the motor and the main body are assembled, the motor is plugged into and matched with the second positioning portion to be positioned on the lower side of the main body shell top wall, so that the motor and the second positioning portion are coaxial. When the crushing cup is installed on the main body, the crushing cup is plugged into and matched with the first positioning portion to be positioned on the upper side of the main body shell top wall, and the crushing cup is coaxial with the first positioning portion. Therefore, since the first positioning portion and the second positioning portion are both located on the shell top wall and are coaxially arranged, the installation of the motor and the crushing cup both uses the shell top wall of the main body as a unified installation reference, thereby realizing the coaxial installation of the crushing cup and the motor, and improving the coaxiality of the crushing cup and the motor in the whole machine, so that the motor shaft of the motor concentrically drives the crushing knife in the crushing cup, the operation of the crushing knife is stable, and the working noise is reduced.

[0007] In a preferred embodiment, the second positioning portion includes a positioning ring extending downward, an annular rib is protruded from the upper end of the motor and is plugged into the positioning ring, and a buffer is sandwiched between the annular rib and the positioning ring.

[0008] The second positioning part includes a positioning ring extending downward, and the upper end of the motor is convexly provided with an annular rib connected to the positioning ring. The positioning ring and the annular rib can be limited and matched in all directions around the axis of the whole machine, thereby further improving the coaxiality between the motor and the second positioning part, and then improving the coaxiality between the crushing cup and the motor; since the annular rib and the positioning ring are rigid structures for plug-in positioning, a buffer is clamped between the annular rib and the positioning ring to achieve a flexible connection between the annular rib and the positioning ring, which can offset the error of the annular rib and the positioning ring due to machining accuracy, avoid the installation eccentricity caused by machining errors when installing the motor and the main machine, improve the concentricity, reduce the transmission noise between the motor and the crushing knife, and at the same time avoid the working vibration of the whole machine, which causes the noise caused by the hard collision of the annular rib and the positioning ring, so that the noise during the operation of the whole machine is reduced.

[0009] In a preferred embodiment, the annular rib is inserted into the inner side of the positioning ring, the buffer is sleeved on the upper end of the annular rib, and the buffer is provided with a convex point that protrudes radially outward and abuts against the positioning ring.

[0010] By inserting the annular rib into the inner side of the positioning ring, the annular rib of the motor is limited in the internal space defined by the positioning ring. The buffer is sleeved on the upper end of the annular rib, which facilitates the assembly and matching of the buffer and the motor. A convex point is provided on the radial outer side of the buffer to abut against the positioning ring. The convex point abuts against the inner side surface of the positioning ring, which can not only achieve a reliable interference fit, but also avoid distortion of the buffer, so that the annular rib is more reliably installed in the space defined by the positioning ring through the buffer, and the motor and the positioning ring can be installed concentrically.

[0011] In a preferred embodiment, a slot is provided on the bottom end surface of the positioning ring, the top end of the annular rib is inserted into the slot, and the buffer member is provided in the slot.

[0012] By providing a slot on the bottom end surface of the positioning ring, the top end of the annular rib is inserted into the slot, so that the limitation between the annular rib and the positioning ring in the radial direction is more reliable, thereby preventing the motor from moving radially relative to the top wall of the main body shell, so that the motor and the main body can be reliably assembled together, so that the motor and the crushing knife can maintain concentricity for a long time.

[0013] In a preferred embodiment, a limiting portion is protruded from the side of the motor, and a mounting portion corresponding to the limiting portion is provided on the top wall of the shell. The limiting portion is fixedly connected to the mounting portion so that the motor is hoisted on the top wall of the shell.

[0014] By protruding a limiting portion on the side of the motor and correspondingly providing a mounting portion on the top wall of the shell, the motor is hoisted to the top wall of the shell by using the limiting portion and the mounting portion. Therefore, the motor is not only radially limited by the top wall of the shell to maintain coaxiality with the crushing knife, but the motor and the top wall of the shell directly achieve axial limitation. Compared with fixing the motor in other positions, the coaxial installation of the motor and the second positioning portion can be further ensured.

[0015] In a preferred embodiment, the limiting portion includes a plurality of hollow columns arranged at circumferential intervals around the motor, the mounting portion includes a plurality of studs extending downward from the top wall of the shell, the fasteners pass through the hollow columns and are locked to the studs, and a silicone ring is arranged between the hollow columns and the corresponding studs.

[0016] By configuring the limiting portion to include multiple hollow columns spaced circumferentially around the motor, the hollow columns cooperate with the studs to limit the motor's axial position. The multiple hollow columns also improve the coaxiality of the motor and the main unit, achieving multiple functions using the limiting portion, a compact structure, and a rational layout. Fasteners pass through the hollow columns and lock onto the studs, securely securing the motor to the main unit. Silicone rings are placed between the hollow columns and the corresponding studs, enabling flexible mounting of the motor and main unit, reducing collision noise between the motor and main unit during operation.

[0017] In a preferred embodiment, the second positioning portion is in the shape of a circular ring, a polygonal ring, or an elliptical ring.

[0018] In a preferred embodiment, the second positioning portion includes a plurality of ribs spaced apart around the axis of the motor.

[0019] Whether the second positioning portion is a closed-loop ring or consists of multiple intermittent ribs, it can radially limit the motor, allowing the motor and the second positioning portion to be coaxially arranged. This, in turn, allows the motor shaft to be concentric with the blade axis of the pulverizer, improving the operating stability of the pulverizer and reducing noise. The second positioning portion, whether in the form of a circular ring, polygonal ring, or elliptical ring, can form a full-scale limit around the motor's axis, increasing the mating area between the motor and the second positioning portion and ensuring a more stable coaxial fit. The second positioning portion utilizes multiple ribs, resulting in a simple and compact structure.

[0020] In a preferred embodiment, the first positioning portion is a mounting groove for accommodating the grinding cup.

[0021] In a preferred embodiment, the first positioning portion is a plurality of convex humps arranged at intervals around the axis of the grinding cup, and the bottom of the grinding cup is provided with a groove for the convex humps to be inserted into.

[0022] Whether the first positioning portion is a mounting groove for accommodating the grinding cup or a plurality of raised bumps, it facilitates accurate installation of the grinding cup while maintaining coaxiality between the grinding cup and the motor. The mounting groove simplifies alignment of the grinding cup and facilitates user operation. The plurality of raised bumps respectively position the grooves at the bottom of the grinding cup, improving the installation accuracy of the grinding cup. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 This is a schematic diagram of the explosion structure of a food processing machine in one embodiment of the present invention;

[0025] Figure 2 This is a schematic cross-sectional view of a food processing machine in one embodiment of the present invention;

[0026] Figure 3 for Figure 2 A magnified schematic diagram of part A in the middle;

[0027] Figure 4 This is a schematic diagram of the explosion structure of the host in one embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the transverse cross-sectional structure of the host in one embodiment of the present invention.

[0029] Explanation of the reference numerals: 10, main unit; 11, outer shell; 110, shell top wall; 1101, mounting portion; 1102, silicone ring; 111, first positioning portion; 1111, rotary groove; 1112, rotary buckle; 112, second positioning portion; 113, shell; 114, shell base; 20, crushing cup; 21, crushing knife; 30, motor; 301, annular rib; 302, limiting portion; 31, upper end cover; 32, main body; 33, lower end cover; 40, coupling; 50, buffer member; 51, bump. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0031] The following description sets forth many specific details to facilitate a thorough understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein, and therefore, the scope of protection of the present invention is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present invention and the features of each embodiment may be combined with each other unless there is a conflict.

[0032] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0035] like Figure 1-5 As shown, the present invention provides a food processing machine with stable operation in one embodiment, including a main unit 10 and a crushing cup 20 detachably mounted on the main unit, wherein a crushing blade 21 is provided inside the crushing cup 20, the main unit 10 includes a housing 11 and a motor 30 fixed in the housing 11, and the rotating shaft of the motor 30 passes through the top wall 110 of the housing 11 and is connected to the crushing blade 21 through a coupling 40. Figure 2 As shown, the shell top wall 110 is integrally provided with a first positioning portion 111 located on the upper side and a second positioning portion 112 located on the lower side. The first positioning portion 111 and the second positioning portion 112 are coaxially arranged, the crushing cup 20 is coaxially arranged and plug-fitted with the first positioning portion 111, and the motor 30 is coaxially arranged and plug-fitted with the second positioning portion 112, so that the crushing cup 20 and the motor 30 are coaxially arranged.

[0036] The food processing machine provided by the present invention has stable operation. The main body 10 has a first positioning portion 111 located on the upper side and a second positioning portion 112 located on the lower side, and the first positioning portion 111 and the second positioning portion 112 are coaxially arranged. When the motor 30 and the main body 10 are assembled, the motor 30 is plugged into and matched with the second positioning portion 112 to be positioned on the lower side of the main body 10's housing top wall 110. When the grinding cup 20 is installed on the main body 10, the grinding cup 20 is plugged into and matched with the first positioning portion 111 to be positioned. On the upper side of the shell top wall 110 of the main machine 10, the crushing cup is coaxial with the first positioning portion. Therefore, since the first positioning portion 111 and the second positioning portion 112 are both located on the shell top wall 110 and coaxially arranged, the installation of the motor 30 and the crushing cup 20 is based on the shell top wall 110 of the main machine 10 as a unified installation reference, thereby realizing the coaxial installation of the crushing cup and the motor, and improving the coaxiality of the crushing cup 20 and the motor 30 in the whole machine, so that the motor 30 shaft of the motor 30 concentrically drives the crushing knife 21 in the crushing cup 20, and the operation of the crushing knife 21 is stable and the working noise is reduced.

[0037] In a preferred embodiment, Figure 3 As shown, the second positioning portion 112 includes a positioning ring extending downward, and an annular rib 301 is protruded from the upper end of the motor 30 and plugged into the positioning ring. A buffer member 50 is sandwiched between the annular rib 302 and the positioning ring.

[0038] The second positioning portion 112 includes a positioning ring extending downward, and the upper end of the motor 30 is convexly provided with an annular rib 301 that is plugged into the positioning ring. The positioning ring and the annular rib 301 can be fully limited and matched around the axis of the entire machine, thereby further improving the coaxiality between the motor 30 and the second positioning portion 112, and then improving the coaxiality between the crushing cup 20 and the motor 30; since the annular rib 301 and the positioning ring are rigid structures for plug-in positioning, a buffer member 50 is clamped between the annular rib 301 and the positioning ring to achieve a flexible connection between the annular rib 301 and the positioning ring, which can offset the error caused by the processing accuracy of the annular rib 301 and the positioning ring, avoid the installation eccentricity caused by the processing error when the motor 30 and the main body 10 are installed, improve the concentricity, reduce the transmission noise between the motor 30 and the crushing knife 21, and at the same time avoid the working vibration of the entire machine, which causes the noise caused by the hard collision of the annular rib 301 and the positioning ring, so that the noise during the operation of the entire machine is reduced.

[0039] More preferably, if Figure 3 As shown, the annular rib 301 is inserted into the inner side of the positioning ring, that is, the second positioning portion 112, and combined with Figure 4 The buffer member 50 is sleeved on the upper end of the annular rib 301 , and the buffer member 50 is provided with a protrusion 51 that protrudes radially outward and abuts against the positioning ring.

[0040] By inserting the annular rib 301 into the inner side of the positioning ring, the annular rib 301 of the motor 30 is limited in the internal space defined by the positioning ring. The buffer 50 is sleeved on the upper end of the annular rib 301, which facilitates the assembly and matching of the buffer 50 and the motor 30. A protrusion 51 is provided on the radial outer side of the buffer 50 to abut against the positioning ring. The protrusion 51 abuts against the inner side surface of the positioning ring, which can not only achieve a reliable interference fit, but also avoid the distortion of the buffer 50, so that the annular rib 301 can be more reliably installed in the space defined by the positioning ring through the buffer 50, and the motor 30 and the positioning ring can be installed concentrically.

[0041] Of course, the connection method between the annular rib and the positioning ring is not limited to the above-mentioned one. In other preferred embodiments, a slot is set on the bottom end face of the positioning ring, the top end of the annular rib 301 is inserted into the slot, and the buffer member 50 is set in the slot.

[0042] By providing a slot on the bottom end surface of the positioning ring, the top end of the annular rib is inserted into the slot, so that the limitation between the annular rib and the positioning ring in the radial direction is more reliable, thereby preventing the motor 30 from moving radially relative to the top wall 110 of the shell of the main unit 10, so that the motor 30 and the main unit 10 can be reliably assembled together, so that the motor 30 and the crushing knife 21 can maintain concentricity for a long time.

[0043] In a preferred embodiment, Figure 4 As shown, the side of the motor 30 is provided with a convex limiting portion 302, and the housing top wall 110 is provided with a mounting portion 1101 corresponding to the limiting portion 302. The limiting portion and the mounting portion are fixedly connected so that the motor 30 is hoisted on the housing top wall 110. Figure 3 、 4 As shown, the limiting portion 302 includes a plurality of hollow columns arranged at circumferential intervals around the motor 30, the mounting portion 1101 includes a plurality of studs extending downward from the top wall 110 of the shell, the fasteners pass through the hollow columns and are locked to the studs, and a silicone ring 1102 is arranged between the hollow columns and the corresponding studs.

[0044] By providing a protruding limiting portion on the side of the motor 30 and correspondingly providing a mounting portion on the housing top wall 110, the limiting portion and the mounting portion are fixedly used to achieve the motor 30 being hoisted on the housing top wall 110. Therefore, the motor 30 is not only radially limited by the housing top wall 110 to maintain coaxiality with the crushing blade 21, but the motor 30 and the housing top wall 110 are also directly limited in the axial direction. Compared with fixing the motor 30 in other positions, the coaxial installation of the motor 30 and the second positioning portion 112 can be further ensured. By providing the limiting portion as a plurality of hollow columns arranged at intervals around the circumference of the motor 30, the hollow columns cooperate with the studs to achieve axial limiting of the motor 30. At the same time, the cooperation of the plurality of hollow columns can also improve the coaxiality of the motor 30 and the main unit 10. The limiting portion achieves multiple functions, the structure is compact, and the layout is reasonable. The fastener passes through the hollow column and is locked to the stud, so that the motor 30 and the host 10 are firmly fixed. A silicone ring is set between the hollow column and the corresponding stud to achieve flexible installation of the motor 30 and the host 10, reducing the collision noise between the motor 30 and the host 10 when the whole machine is working.

[0045] like Figure 4 As shown, in a preferred embodiment, the housing 11 includes a shell 113 with upper and lower openings, a shell top wall 110 provided at the upper end of the shell 113 and a shell base 114 provided at the lower end of the shell. The shell 113, the shell top wall 110 and the shell base 114 together form an installation cavity for accommodating the motor. More specifically, as Figure 4 As shown, the motor 30 includes an upper end cover 31, a main body 32 and a lower end cover 33. The annular rib 301 is protruded from the upper end cover 31, and the limiting portion is provided on the upper end cover, so that the upper end cover is hoisted on the top wall of the shell, and the main body is hoisted on the upper end cover and is located in the installation cavity enclosed by the upper end cover and the lower end cover.

[0046] Of course, it should be noted that the second positioning portion in the present invention is preferably annular, and is not limited to the circular shape in the above embodiment. For example, the second positioning portion 112 can also be a polygonal ring or an elliptical ring. Alternatively, the second positioning portion 112 includes a plurality of ribs spaced apart around the axis of the motor 30.

[0047] Whether the second positioning portion 112 is a closed-loop annular shape or comprises multiple intermittent ribs, it can radially limit the motor 30, allowing the motor 30 to be coaxially arranged with the second positioning portion 112. This allows the motor 30 and the second positioning portion 112 to be concentric with the axis of the crushing blade 21, thereby improving the operational stability of the crushing blade 21 and reducing noise. The second positioning portion 112 can be in the shape of a circular ring, a polygonal ring, or an elliptical ring, and can form a full-scale limit around the axis of the motor 30, thereby increasing the mating area between the motor 30 and the second positioning portion 112 and ensuring a more stable coaxial fit. The second positioning portion 112 utilizes multiple ribs, resulting in a simple and compact structure.

[0048] In a preferred embodiment, Figure 1 As shown, the first positioning portion 111 is a mounting groove for accommodating the grinding cup 20. More preferably, as Figure 1 As shown, a rotation groove 1111 is provided on the inner side wall of the installation groove, and a rotation buckle 1112 is provided on the bottom of the grinding cup 20. The rotation buckle cooperates with the rotation groove, and the grinding cup 20 is screwed into the installation groove after being inserted into the installation groove from top to bottom.

[0049] Of course, the first positioning portion is not limited to the above-mentioned mounting groove. In another preferred embodiment, the first positioning portion 111 is a plurality of convex bumps arranged at intervals around the axis of the grinding cup 20, and the bottom of the grinding cup 20 is provided with a groove for the convex bumps to be inserted.

[0050] It is understood that whether the first positioning portion 111 is a mounting groove for accommodating the grinding cup 20 or a plurality of raised bumps, it can facilitate the user to accurately install the grinding cup 20 and maintain the coaxiality of the grinding cup 20 and the motor 30. The mounting groove can reduce the difficulty of aligning the grinding cup 20 when installing the grinding cup 20, making it easier for the user to operate. The use of multiple raised bumps to limit the grooves at the bottom of the grinding cup 20 improves the installation accuracy of the grinding cup 20.

[0051] Anything not described in this utility model can be achieved by adopting or drawing on existing technologies.

[0052] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0053] The above are merely examples of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims of the present invention.

Claims

1. A food processor with stable operation, comprising a main unit and a crushing cup detachably mounted above the main unit, wherein a crushing blade is provided inside the crushing cup, the main unit comprises a housing and a motor fixed within the housing, wherein a rotating shaft of the motor passes through a top wall of the housing and is connected to the crushing blade via a coupling, wherein: The shell top wall is integrally provided with a first positioning portion located on the upper side and a second positioning portion located on the lower side, the first positioning portion and the second positioning portion are coaxially arranged, the crushing cup is coaxially arranged and plug-fitted with the first positioning portion, and the motor is coaxially arranged and plug-fitted with the second positioning portion, so that the crushing cup and the motor are coaxially arranged.

2. A food processing machine with stable operation according to claim 1, characterized in that: The second positioning portion includes a positioning ring extending downward, an annular rib is protruded from the upper end of the motor and is plugged into the positioning ring, and a buffer is sandwiched between the annular rib and the positioning ring.

3. A food processing machine with stable operation according to claim 2, characterized in that: The annular rib is inserted into the inner side of the positioning ring, the buffer is sleeved on the upper end of the annular rib, and the buffer is provided with a convex point which protrudes radially outward and abuts against the positioning ring.

4. The food processing machine with stable operation according to claim 2, characterized in that: A slot is provided on the bottom end surface of the positioning ring, the top end of the annular rib is inserted into the slot, and the buffer member is provided in the slot.

5. The food processing machine with stable operation according to claim 1, characterized in that: A limiting portion is convexly provided on the side of the motor, and a mounting portion corresponding to the limiting portion is provided on the top wall of the shell. The limiting portion is fixedly connected to the mounting portion so that the motor is hoisted on the top wall of the shell.

6. The food processing machine with stable operation according to claim 5, characterized in that: The limiting portion includes a plurality of hollow columns arranged at circumferential intervals around the motor, the mounting portion includes a plurality of studs extending downward from the top wall of the shell, fasteners pass through the hollow columns and are locked to the studs, and a silicone ring is arranged between the hollow columns and the corresponding studs.

7. The food processing machine with stable operation according to claim 1, characterized in that: The second positioning portion is in the shape of a circular ring, a polygonal ring or an elliptical ring.

8. The food processing machine with stable operation according to claim 1, characterized in that: The second positioning portion includes a plurality of ribs spaced apart around an axis of the motor.

9. The food processing machine with stable operation according to claim 1, characterized in that: The first positioning portion is a mounting groove for accommodating the grinding cup.

10. The food processing machine with stable operation according to claim 1, characterized in that: The first positioning portion is a plurality of convex humps arranged at intervals around the axis of the grinding cup, and the bottom of the grinding cup is provided with a groove for the convex humps to be inserted into.

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