Knife assembly and food processor

By designing improved knife components, including cutter plate components, blade components and anti-detachment parts, the problem of high watertightness requirements and easy removal of the agitator components in the cooking machine during cleaning is solved, and the rapid disassembly and anti-detachment functions are achieved, reducing structural complexity and manufacturing costs.

CN222640350UActive Publication Date: 2025-03-21ZHEJIANG SHAOXING SUPOR DOMESTIC ELECTRICAL APPLIANCE CO LTD
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Patent Information

Application Number
CN202420573958.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-22
Publication Date
2025-03-21
Estimated Expiration
2034-03-22

AI Technical Summary

Technical Problem

During the cleaning process, the mixing components in existing cooking machines have problems such as high watertightness requirements, complex structure, high manufacturing cost and easy removal of the knife during work.

Method used

An improved tool assembly is designed including a cutter plate assembly, a blade assembly and an anti-detachment piece. The blade assembly is driven by a tool sleeve and the tool shaft. The anti-disengagement member is supported on the inclined step surface, which can prevent the blade assembly from falling out during work and facilitate quick disassembly and assembly when stopping work.

Benefits of technology

The tool assembly is quickly disassembled and installed and anti-detachment functions are realized, reducing structural complexity and manufacturing costs, and improving use safety.

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Abstract

The utility model relates to a knife assembly and a food processor. The cutter assembly comprises a cutter head assembly and a blade assembly, the cutter head assembly comprises a cutter head and a cutter shaft movably arranged on the cutter head, the cutter shaft comprises a lower section and an upper section which are located above the cutter head and are coaxial, the upper section is connected to the upper portion of the lower section, the upper section is a big-end-down step section, and an inclined step face is formed at the position of a step. The blade assembly comprises a cutter sleeve and a blade arranged on the cutter sleeve, the cutter sleeve is provided with a cutter sleeve hole allowing the cutter shaft to penetrate through, and the cutter sleeve detachably sleeves the lower section from the upper section and is in transmission connection with the lower section in the circumferential direction. The anti-disengaging piece is arranged on the upper section in a sleeving mode, located above the cutter sleeve, supported on the step face, capable of moving along the step face and provided with a first position and a second position, at least part of the projection of the anti-disengaging piece and the projection of the cutter sleeve in the axial direction of the cutter shaft are overlapped at the first position, and at the second position, at least part of the projection of the anti-disengaging piece is overlapped. The projection area of the anti-disengaging piece in the axial direction of the cutter shaft is located in the projection area of the cutter sleeve hole in the axial direction of the cutter shaft. According to the scheme, the knife assembly can be quickly disassembled and prevented from falling off.
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Description

Technical Field

[0001] The present application relates to the technical field of small household appliances, and more specifically, to a knife assembly and a food processor. Background Art

[0002] The development direction of food processors has always been to make the mixing components detachable and washable. Currently, the solutions for detachable mixing components include detachable blade discs, detachable blade sets, and detachable cup holders. However, during the cleaning process, the water tightness requirements of the disassembled blade discs, blade sets, and cup holders are high, which increases the complexity of the product structure and the manufacturing cost. In addition, the mixing components with detachable structures also have the risk of blades falling off during operation. Summary of the invention

[0003] The present application provides an improved knife assembly and food processor, which can be quickly disassembled, are more simplified in structure, and can prevent the knife from falling off.

[0004] A knife assembly, comprising:

[0005] A cutter disc assembly comprises a cutter disc and a cutter shaft movably arranged on the cutter disc, wherein the cutter shaft comprises a lower section and an upper section which are coaxial and located above the cutter disc, wherein the upper section is connected to the upper part of the lower section, and the upper section comprises a stepped section which is smaller at the top and larger at the bottom, wherein an inclined stepped surface is formed at the step;

[0006] A blade assembly, comprising a blade sleeve and a blade arranged in the blade sleeve, wherein the blade sleeve is provided with a blade sleeve hole for the blade shaft to pass through, and the blade sleeve is detachably sleeved from the upper section to the lower section and is circumferentially transmission-connected with the lower section; and

[0007] The anti-slip part is sleeved on the upper section and is located above the knife sleeve. The anti-slip part is supported on the step surface and is movable along the step surface. The anti-slip part is provided with a first position and a second position. In the first position, the anti-slip part and the projection of the knife sleeve along the axial direction of the knife shaft at least partially overlap. In the second position, the projection area of ​​the anti-slip part along the axial direction of the knife shaft is located within the projection area of ​​the knife sleeve hole along the axial direction of the knife shaft. In this scheme, the knife sleeve is sleeved on the lower section and is connected to the lower section by transmission, so that the rotation of the blade assembly can be realized, and then the food is whipped. The anti-slip part is sleeved on the upper section and supported on the inclined step surface, which makes the anti-slip part slide to the lower side along the step surface, that is, the anti-slip part is in the first position. In the first position, the anti-slip part is offset relative to the axis of the knife shaft, and the projection of the anti-slip part and the knife sleeve along the axial direction of the knife shaft at least partially overlaps. In this way, the knife sleeve is restricted by the anti-slip part, and the knife is prevented from slipping off. In addition, the blade assembly and the anti-dropping member are installed on the knife shaft in a sleeve-type manner. When the blade assembly stops working, the user can move the anti-dropping member to a second position. In the second position, the projection area of ​​the anti-dropping member along the axial direction of the knife shaft is located within the projection area of ​​the knife sleeve hole along the axial direction of the knife shaft. At this time, the knife sleeve is not restricted by the anti-dropping member, and the blade assembly can be directly removed, realizing the rapid disassembly and assembly of the blade assembly. In addition, when cleaning the blade assembly, there is no need to consider water tightness, and no sealing structure needs to be set, so the structure is simplified.

[0008] Optionally, the anti-slip member includes an inclined surface supported on the step surface, and the inclination angle of the inclined surface is the same as the inclination angle of the step surface. In this way, a large area of ​​the step surface and the inclined surface can be fitted together, ensuring that the anti-slip member can be supported on the step surface more stably, so as to reduce the axial movement of the anti-slip member 33.

[0009] Optionally, the inclination angle between the stepped surface and the inclined surface is β, 30°≤β≤80°. The larger the β angle and the greater the inclination, the greater the component force of the gravity of the anti-slipping member along the inclined surface, so that the anti-slipping member can be more stably in the first position, and the anti-slipping effect is better.

[0010] Optionally, the lower end of the anti-slip member is sleeved on the large end of the upper section, and the inclined surface is formed inside the anti-slip member. In other words, the anti-slip member can cover at least part of the upper section, and the anti-slip member can also achieve clearance fit with the upper section of the knife shaft, so that the movement of the blade assembly in the radial direction of the knife shaft when working can be limited, thereby improving the stability of the anti-slip member at the first position and improving the anti-slip effect.

[0011] Optionally, the diameter of the lower section is larger than that of the upper section, the knife sleeve hole is configured as a stepped hole with a smaller top and a larger bottom, and the knife sleeve is supported at the junction of the upper section and the lower section. In this way, the blade assembly can be separated from the cutter disc by a preset distance, so as to prevent the blade assembly from moving downward and contacting the shaft sleeve at the center of the cutter disc when rotating.

[0012] Optionally, in the first position, in the orthographic projection along the axial direction of the tool shaft, the projection area of ​​the anti-slip component at least partially exceeds the contour line of the small end of the tool sleeve hole, the diameter of the small end of the tool sleeve hole is D1, the outer diameter of the anti-slip component is D2, and D1≥D2. The anti-slip component is supported on the step surface, which will cause the axis of the anti-slip component to be offset relative to the axis of the tool sleeve hole, so that the anti-slip component can play a role in preventing the tool sleeve from escaping along the axial direction of the tool shaft. D2≤D1 will make the size of the anti-slip component relatively small, thereby reducing the inertia during rotation, thereby reducing the radial movement.

[0013] Optionally, the lower section is provided with a convex ridge extending from top to bottom in a spiral manner, the knife sleeve is provided with a concave portion cooperating with the convex ridge, the knife sleeve is sleeved on the lower section along the convex ridge, and the convex ridge and the concave portion cooperate to transmit power in a circumferential direction. When the knife sleeve is sleeved on the knife shaft, the concave portion and the convex ridge can be slidably matched to improve the smoothness of the matching.

[0014] Optionally, the convex ridges are provided in plurality, and the plurality of convex ridges are distributed around the axis of the knife shaft, and the concave portions are provided in plurality, corresponding to the convex ridges one by one. In this case, the plurality of convex ridges and the plurality of concave portions can be matched one by one, and the force is more balanced when the sleeve is installed.

[0015] Optionally, the knife sleeve comprises an upper knife sleeve and a lower knife sleeve, the upper knife sleeve is detachably connected to the lower knife sleeve, the blade is clamped and fixed between the upper knife sleeve and the lower knife sleeve, and the lower knife sleeve is provided with the recess. This solution facilitates the disassembly and assembly of the blade, facilitates the replacement of the blade, and facilitates the separate cleaning of the blade.

[0016] Optionally, a radially protruding and circumferentially extending limiting flange is provided at the top of the upper section, the anti-slipping member is located below the limiting flange, in the first position, the projection of the limiting flange along the axial direction of the blade shaft at least partially overlaps with the projection of the limiting flange along the axial direction of the blade shaft, in the second position, the projection of the limiting flange along the axial direction of the blade shaft is located within the projection of the blade sleeve hole. With such arrangement, in the first position, the anti-slipping member is limited by the limiting flange to prevent axial slipping, and in the second position, the limiting flange will not interfere with the disassembly of the blade assembly.

[0017] A food processor, comprising:

[0018] Host;

[0019] cup assembly; and

[0020] The knife assembly described in any of the above items is installed at the bottom of the cup assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of a food processor according to an exemplary embodiment of the present application;

[0022] Figure 2 yes Figure 1 A cross-sectional view of a food processor shown in FIG.

[0023] Figure 3 yes Figure 1 An exploded view of a food processor shown in FIG.

[0024] Figure 4 It is the assembly drawing of the knife assembly;

[0025] Figure 5 is an exploded view of the cutterhead assembly and the blade assembly;

[0026] Figure 6 It is a schematic diagram of the internal structure of the anti-slip component;

[0027] Figure 7 is a cross-sectional view of the knife assembly;

[0028] Figure 8 It is a cross-sectional view of the knife assembly in an exploded state. DETAILED DESCRIPTION

[0029] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application.

[0030] The terms used in this application are only for the purpose of describing specific embodiments, and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate quantity restrictions, but indicate that there is at least one, and will be separately described if only "one" is referred to. "Multiple" or "several" means two or more. Unless otherwise specified, similar words such as "front", "rear", "lower" and / or "upper", "top", "bottom" are only for the convenience of explanation, and are not limited to one position or one spatial orientation. Similar words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. The words "connected" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0031] Please refer to Figures 1 to 3 , Figure 1 It is a schematic diagram of a food processor 100 according to an exemplary embodiment of the present application. Figure 2 yes Figure 1 A cross-sectional view of a food processor 100 is shown in FIG. Figure 3 yes Figure 1 An exploded view of the blender 100 is shown in FIG.

[0032] The present application provides a food processor 100, including a main unit 10, a cup assembly 20 and a knife assembly 30, wherein the cup assembly 20 is assembled above the main unit 10, and the knife assembly 30 is installed at the bottom of the cup assembly 20 for whipping food in a cup cavity.

[0033] The cup assembly 20 includes a cup body 21 and a cup seat 22, wherein the cup seat 22 is located at the bottom of the cup body 21. The cup seat 22 includes a cup seat bucket 221 and a bottom shell 222 connected to each other, and the knife assembly 30 is installed in the cup seat bucket 221.

[0034] Please refer to Figure 4 and Figure 5 , Figure 4 It is an assembly diagram of the knife assembly 30. Figure 5 It is an exploded view of the cutter head assembly 31 and the blade assembly 32.

[0035] The knife assembly 30 includes a knife disc assembly 31, a blade assembly 32 and an anti-slip member 33. The blade assembly 32 and the knife disc assembly 31 can be quickly disassembled and assembled. The knife disc assembly 31 includes a knife disc 310 and a knife shaft 311 rotatably arranged on the knife disc 310. The knife disc 310 can be a knife disc 310 with a heating function. The end of the knife shaft 311 located below the knife disc 310 is used for transmission connection with the motor shaft in the host 10, and the end of the knife disc 310 located above the knife disc 310 is transmission connected with the blade assembly 32, and the upper part of the knife disc 310 faces the cup cavity.

[0036] The anti-slip member 33 is connected to the blade shaft 311, and can also prevent the blade assembly 32 from slipping out of the blade shaft 311. Specifically, the blade shaft 311 includes a lower section 3111 and an upper section 3112, which are coaxially arranged above the blade disc 310, and the upper section 3112 is connected to the upper part of the lower section 3111. The upper section 3112 includes a stepped section with a small upper portion and a large lower portion, and an inclined stepped surface 3113 is formed at the step of the upper section 3112, and the stepped surface 3113 is an inclined surface, which is inclined relative to the plane perpendicular to the blade shaft 311.

[0037] The blade assembly 32 includes a knife sleeve 320 and a blade 321 disposed on the knife sleeve 320. The knife sleeve 320 is provided with a knife sleeve hole 3200 for the knife shaft 311 to pass through. The blade 321 may include one or more blades, and the multiple blades may be distributed around the circumference of the knife sleeve 320. The knife sleeve 320 is detachably sleeved from the upper section 3112 to the lower section 3111, and is circumferentially connected to the lower section 3111, thereby transmitting the power of the knife shaft 311 to the knife sleeve 320, and then transmitting the power to the blade assembly 32.

[0038] The anti-slip member 33 is sleeved on the upper section 3112 and is located above the knife sleeve 320. The anti-slip member 33 is supported on the step surface 3113 and is movable along the step surface 3113. The anti-slip member 33 is provided with a first position and a second position. In the first position, the anti-slip member 33 and the projection of the knife sleeve 320 along the axial direction of the knife axis at least partially overlap. In the second position, the projection area of ​​the anti-slip member 33 along the axial direction of the knife axis is located within the projection area of ​​the knife sleeve hole 3200 along the axial direction of the knife axis.

[0039] According to the above description, the knife sheath 320 is sleeved on the lower section 3111 and is in transmission connection with the lower section 3111, so that the blade assembly 32 can be rotated to beat the food. The anti-slipping member 33 is sleeved on the upper section 3112 and supported on the inclined stepped surface 3113, so that the anti-slipping member 33 can slide along the stepped surface 3113 to the lower side and be offset relative to the axis of the knife shaft 311. At this time, the anti-slipping member 33 is in the first position, and the projection of the anti-slipping member 33 and the knife sheath 320 along the axial direction of the knife shaft at least partially overlaps. In this way, the knife sheath 320 is restricted by the anti-slipping member 33, and the knife is prevented from slipping. In addition, the blade assembly 32 and the anti-slip member 33 are installed on the knife shaft 311 in a sleeve-type manner. When the blade assembly 32 stops working, the user can move the anti-slip member 33 to the second position. In the second position, the projection area of ​​the anti-slip member 33 along the axial direction of the knife shaft is located within the projection area of ​​the knife sleeve hole 3200 along the axial direction of the knife shaft. At this time, the knife sleeve 320 is not restricted by the anti-slip member 33, and the blade assembly 32 can be directly removed. The anti-slip member 33 can pass through the knife sleeve hole 3200, thereby realizing the rapid disassembly and assembly of the blade assembly 32. In addition, when cleaning the blade assembly 32, there is no need to consider water tightness, and there is no need to set a sealing structure, so the structure is simplified.

[0040] Please refer to Figure 6 , Figure 6 It is a schematic diagram of the internal structure of the anti-slip component 33.

[0041] In one embodiment, the anti-slip member 33 includes an inclined surface 330 supported on the step surface 3113, and the inclined surface 330 can be arranged on the bottom surface of the anti-slip member 33, or can be arranged inside the anti-slip member 33. The inclination angle of the inclined surface 330 is the same as the inclination angle of the step surface 3113. In this way, the step surface 3113 and the inclined surface 330 can be fitted over a larger area, ensuring that the anti-slip member 33 can be more stably supported on the step surface 3113, so as to reduce the axial movement of the anti-slip member 33.

[0042] In a specific embodiment, the inclination angle between the stepped surface 3113 and the inclined surface 330 is β, 30°≤β≤80°. For example, the β angle can be set to 30°, 40°, 50°, 60°, 70°, 80°, but is not limited thereto. The larger the β angle and the greater the inclination, the greater the component force of the gravity of the anti-slip member 33 along the inclined surface 330, and the anti-slip member 33 can be more stably in the first position, and the anti-slip effect is better.

[0043] Please combine Figure 6 and Figure 7 , Figure 7 is a cross-sectional view of the knife assembly 30 .

[0044] In one embodiment, the lower end of the anti-slip member 33 is sleeved on the large end of the upper section 3112, and the inclined surface 330 is formed inside the anti-slip member 33. In other words, the anti-slip member 33 can cover at least part of the upper section 3112, and the anti-slip member 33 can also achieve clearance fit with the upper section 3112 of the knife shaft, so that the movement of the blade assembly 32 in the radial direction of the knife shaft when working can be limited, thereby improving the stability of the anti-slip member 33 at the first position and improving the anti-slip effect.

[0045] Please combine Figure 7 and Figure 8 , Figure 8 It is a cross-sectional view of the knife assembly 30 in an exploded state.

[0046] In one embodiment, the diameter of the lower section 3111 is greater than the diameter of the upper section 3112, and the knife sleeve hole 3200 is set as a stepped hole with a smaller top and a larger bottom. The knife sleeve 320 is supported at the junction of the upper section 3112 and the lower section 3111 by the stepped surface of the stepped hole. In this way, the knife sleeve 320 is supported on the knife shaft 311, so that the blade assembly 32 and the knife disc 310 can be separated by a preset distance, so as to prevent the blade assembly 32 from moving downward and contacting the shaft sleeve 312 at the center of the knife disc 310 when rotating. The top of the lower section 3111 is an umbrella-shaped structure.

[0047] In one embodiment, Figure 7 As shown, in the first position, in the orthographic projection along the axial direction of the tool shaft, the projection area of ​​the anti-slip member 33 at least partially exceeds the contour line of the small end of the tool sleeve hole 3200, that is, the anti-slip member 33 is supported on the step surface 3113, which will cause the axis of the anti-slip member 33 to be offset relative to the axis of the tool sleeve hole 3200, so that the anti-slip member 33 can play a role in blocking the tool sleeve 320 from slipping out along the axial direction of the tool shaft. In addition, the outer diameter D2 of the anti-slip member 33 is less than or equal to the diameter D1 of the small end of the tool sleeve hole 3200, and D1≥D2. Such a setting will make the size of the anti-slip member 33 relatively small, thereby reducing the inertia during rotation, thereby reducing the radial movement.

[0048] In one embodiment, Figure 7As shown, the top of the upper section 3112 is provided with a limiting flange 3114 protruding radially and extending circumferentially, and the anti-slip member 33 is located below the limiting flange 3114. In the first position, the anti-slip member 33 and the projection of the limiting flange 3114 along the axial direction of the knife shaft at least partially overlap. In other words, when the anti-slip member 33 is in the first position, at least part of the anti-slip member 33 is located below the limiting flange 3114. At this time, the anti-slip member 33 is limited by the limiting flange 3114 to avoid axial disengagement. Among them, the limiting flange 3114 can be formed on the top of the knife shaft 311 by riveting, for example, after the anti-slip member 33 is installed, the top of the knife shaft 311 is riveted to form the limiting flange 3114. Alternatively, the limiting flange 3114 can also be fixedly connected to the top of the knife shaft 311 by welding. It should also be noted that, in the second position, the projection of the limiting flange 3114 along the axial direction of the knife shaft is located within the projection of the knife sleeve hole 3200 along the axial direction of the knife shaft, so as not to interfere with the disassembly of the blade assembly 32.

[0049] Please continue to refer to Figure 5 The lower section 3111 is provided with a convex ridge 40 extending from top to bottom in a spiral manner, and the knife sleeve 320 is provided with a concave portion (not shown in the figure) that cooperates with the convex ridge 40. The knife sleeve 320 is sleeved on the lower section 3111 along the convex ridge 40. When the knife sleeve 320 is sleeved on the knife shaft 311, the concave portion and the convex ridge 40 are slidably matched to improve the smoothness of the matching. In addition, the knife sleeve 320 and the knife shaft 311 also realize circumferential transmission through the matching of the convex ridge 40 and the concave portion.

[0050] In one embodiment, there are multiple ridges 40, which are distributed along the circumference of the blade shaft, and there are multiple recesses, which are matched one by one with the ridges 40. In this case, the multiple ridges 40 and the multiple recesses can be matched one by one, and the force is more balanced when they are installed. Figure 5 In the illustrated embodiment, four ridges 40 are provided and evenly distributed along the circumference of the knife shaft. The knife sleeve hole 3200 in the hollow part of the knife sleeve 320 is square, and a recess can be formed between two adjacent inner walls. The ridges 40 cooperate with the recess so that the knife sleeve 320 and the knife shaft 311 can realize circumferential transmission.

[0051] Please refer to Figure 8 The knife sleeve 320 includes an upper knife sleeve 3201 and a lower knife sleeve 3202, wherein the upper knife sleeve 3201 and the lower knife sleeve 3202 are detachably connected, and the blade 321 is clamped between the upper knife sleeve 3201 and the lower knife sleeve 3202. The upper knife sleeve 3201 and the lower knife sleeve 3202 can be connected by threads, but are not limited thereto. This solution is conducive to replacing the blade 321 and is convenient for cleaning the blade 321.

[0052] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A knife assembly, characterized in that: include: A cutter disc assembly (31), comprising a cutter disc (310) and a cutter shaft (311) movably arranged on the cutter disc (310), wherein the cutter shaft (311) comprises a lower section (3111) and an upper section (3112) which are coaxially located above the cutter disc (310), wherein the upper section (3112) is connected to the upper part of the lower section (3111), and the upper section (3112) comprises a stepped section which is smaller at the top and larger at the bottom, and an inclined stepped surface (3113) is formed at the stepped section; A blade assembly (32), comprising a blade sleeve (320) and a blade (321) arranged on the blade sleeve (320), wherein the blade sleeve (320) is provided with a blade sleeve hole (3200) for the blade shaft (311) to pass through, and the blade sleeve (320) is detachably sleeved from the upper section (3112) to the lower section (3111), and is circumferentially transmission-connected with the lower section (3111); and The anti-slip component (33) is sleeved on the upper section (3112) and is located above the knife sleeve (320). The anti-slip component (33) is supported on the step surface (3113) and is movable along the step surface (3113). The anti-slip component (33) is provided with a first position and a second position. In the first position, the anti-slip component (33) and the projection of the knife sleeve (320) along the axial direction of the knife axis at least partially overlap. In the second position, the projection area of ​​the anti-slip component (33) along the axial direction of the knife axis is located within the projection area of ​​the knife sleeve hole (3200) along the axial direction of the knife axis.

2. The knife assembly according to claim 1, characterized in that The anti-slip component includes an inclined surface supported on the step surface (3113), and the inclination angle of the inclined surface is the same as the inclination angle of the step surface.

3. The knife assembly according to claim 2, characterized in that The inclination angle between the step surface (3113) and the inclined surface is β, 30°≤β≤80°.

4. The knife assembly according to claim 2, characterized in that The lower end of the anti-slip component (33) is sleeved on the large end of the upper section (3112), and the inclined surface is formed inside the anti-slip component (33).

5. The knife assembly according to any one of claims 1 to 4, characterized in that: The diameter of the lower section (3111) is greater than the diameter of the upper section (3112), and the knife sleeve hole (3200) is configured as a stepped hole that is smaller at the top and larger at the bottom. The knife sleeve (320) is supported at the junction of the upper section (3112) and the lower section (3111).

6. The knife assembly according to claim 5, characterized in that In the first position, in the orthographic projection along the axial direction of the tool shaft, the projection area of ​​the anti-slip component (33) at least partially exceeds the contour line of the small end of the tool sleeve hole (3200), the diameter of the small end of the tool sleeve hole (3200) is D1, the outer diameter of the anti-slip component (33) is D2, and D1≥D2.

7. The knife assembly according to any one of claims 1 to 4 and 6, characterized in that: The lower section (3111) is provided with a convex ridge (40) extending from top to bottom in a spiral manner, and the knife sleeve (320) is provided with a recessed portion cooperating with the convex ridge (40). The knife sleeve (320) is sleeved on the lower section (3111) along the convex ridge (40), and the convex ridge (40) cooperates with the recessed portion to transmit power in a circumferential direction.

8. The knife assembly according to claim 7, characterized in that There are a plurality of convex ridges (40), and the plurality of convex ridges (40) are distributed around the axis of the knife shaft (311), and there are a plurality of concave portions, which correspond one to one with the convex ridges (40); and / or The knife sleeve (320) comprises an upper knife sleeve (3201) and a lower knife sleeve (3202); the upper knife sleeve (3201) and the lower knife sleeve (3202) are detachably connected; the blade (321) is clamped and fixed between the upper knife sleeve (3201) and the lower knife sleeve (3202); and the lower knife sleeve (3202) is provided with the recess.

9. The knife assembly according to any one of claims 1 to 4, 6 and 8, characterized in that: The top of the upper section (3112) is provided with a limiting flange (3114) which protrudes radially and extends circumferentially, and the anti-slip component (33) is located below the limiting flange (3114). In the first position, the projection of the anti-slip component (33) and the limiting flange (3114) along the axial direction of the tool shaft at least partially overlaps. In the second position, the projection of the limiting flange (3114) along the axial direction of the tool shaft is located within the projection of the tool sleeve hole (3200).

10. A food processor, characterized in that: include: Host (10); Cup assembly (20); and The knife assembly (30) according to any one of claims 1 to 9, wherein the knife assembly (30) is mounted on the bottom of the cup assembly (20).