Stirring knife and food processor

Abstract

The utility model relates to a stirring knife and a food processor. The stirring cutter comprises a cutter shaft, and an upper blade and a lower blade which are connected to the cutter shaft. The upper blade is located above the lower blade, the lower blade is a plane blade, the upper blade is bent upwards, the axis of the cutter shaft serves as the circle center, the ratio of the maximum diameter of the upper blade to the maximum diameter of the lower blade is K, and K is larger than or equal to 0.2 and smaller than or equal to 0.6. The scheme can increase the centrifugal force of the main crushing blade and improve the crushing effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of small household appliances, in particular to a stirring blade and a food processor. BACKGROUND

[0002] Some food processors adopt a stirring blade provided with double-layer blades, wherein the upper blade is bent upward and mainly used for disturbing flow, and the lower blade is bent downward and mainly used for crushing food materials. However, the centrifugal force generated by the rotation of the lower blade is relatively small, and the crushing effect on food materials is not good. SUMMARY

[0003] The present application provides a stirring blade and a food processor, which can increase the centrifugal force of the main crushing blade and improve the crushing effect.

[0004] A stirring blade comprises:

[0005] a blade shaft;

[0006] an upper blade and a lower blade connected to the blade shaft, the upper blade is located above the lower blade, the lower blade is a planar blade, the upper blade is bent upward, and the maximum diameter of a circle where the tip of the upper blade is located and the maximum diameter of a circle where the tip of the lower blade is located have a ratio K, and 0.2≤K≤0.6.

[0007] The stirring blade and the food processor provided by the present application have the following advantages. The lower blade is provided as a planar blade, the cutting surface of the blade part of the lower blade is planar, the centrifugal force generated is relatively large, the centrifugal force is more concentrated, and the food materials can be cut more finely. In addition, 0.2≤K≤0.6, the radial dimension of the upper blade is small, and the centrifugal force generated is relatively small. Therefore, the lower blade can be used as the main cutting blade, and the upper blade is used to reduce the disturbance vortex of the lower blade, so as to reduce the noise and the load.

[0008] Optionally, any blade of the upper blade and any blade of the lower blade are circumferentially staggered along the blade shaft. The blades of the stirring blade respectively extend in different directions, the blades are more dispersed, the disturbance effect is better, the large or more concentrated vortex is avoided, and the noise and the load are further reduced.

[0009] Optionally, the upper blade comprises a plurality of upper blades, the upper blades are uniformly distributed in the circumferential direction of the blade shaft, and the angle between any two upper blades is not equal to 180°. In this way, any two of the plurality of upper blades are not symmetrical about the plane passing through the axis of the blade shaft, resonance is avoided, and the noise is increased.

[0010] Optionally, the lower blade includes a plurality of lower blade leaves, each of the lower blade leaves is uniformly distributed in the circumferential direction of the blade shaft, and an angle between any two of the lower blade leaves is not equal to 180°. In this way, any two of the plurality of lower blade leaves are not symmetrical about the plane passing through the axis of the blade shaft, resonance is avoided, and noise is increased.

[0011] Optionally, the upper blade includes a plurality of upper blade leaves, the lower blade includes a plurality of lower blade leaves, the plurality of upper blade leaves are uniformly distributed in the circumferential direction of the blade shaft, the plurality of lower blade leaves are uniformly distributed in the circumferential direction of the blade shaft, and in the projection in the axial direction of the blade shaft, there is one lower blade leaf between any two adjacent upper blade leaves, and there is one upper blade leaf between any two adjacent lower blade leaves. In this way, the blade leaves of the upper and lower blades are alternately distributed, the blade leaves are more dispersed, the convection between the upper and lower food materials is better, and the food materials can be beaten more finely.

[0012] Optionally, a first angle is between any two adjacent upper blade leaves, and the lower blade leaf projected between the two adjacent upper blade leaves is located in the middle of the first angle. In this way, the upper blade leaves and the lower blade leaves are alternately and uniformly distributed, the disturbance is more uniform, and the disturbance effect is better.

[0013] Optionally, a second angle is between any two adjacent lower blade leaves, and the upper blade leaf projected between the two adjacent lower blade leaves is located in the middle of the second angle. In this way, the upper blade leaves and the lower blade leaves are alternately and uniformly distributed, the disturbance is more uniform, and the disturbance effect is better.

[0014] Optionally, the upper blade is bent upward by an angle C, and 30°≤C≤85°. The bending angle C is set to be between 30° and 85°, the centrifugal force generated when the upper blade rotates is appropriate, is used to balance the vortex generated by the lower blade, reduces the load and noise.

[0015] Optionally, at least one of the upper blade and the lower blade is provided as a trilobal blade. Any two blade leaves of the trilobal blade are not symmetrical about the plane passing through the axis of the blade shaft, have good dynamic balance, and have low noise.

[0016] Optionally, an axial spacing between the upper blade and the lower blade is H2, and 0≤H2≤20mm. The larger the spacing distance H2 is, the larger the axial size of the stirring blade is, and the better the disturbance effect is.

[0017] A food processor, comprising:

[0018] a main machine;

[0019] a cup assembly including a cup body and the stirring blade of any one of the above-mentioned embodiments, the cup body is provided with a cup cavity, the stirring blade is rotatably installed on the cup body, and the blade of the stirring blade is arranged in the cup cavity.

[0020] Optionally, the cup body comprises a cup bottom at the bottom, and an axial distance between the lower blade of the stirring blade and the cup bottom is H1, 6mm≤H1≤50mm. The distance can avoid the stirring blade from touching the cup bottom, and can also disturb the food material at the cup bottom to prevent the bottom from being pasted.

[0021] Optionally, the inner wall of the cup body is provided with a turbulence rib protruding radially along the blade shaft, a maximum distance between the blade tip of the upper blade and the center of the blade shaft is R1, a maximum distance between the blade tip of the lower blade and the center of the blade shaft is R2, and a radial distance between the protruding end of the turbulence rib and the center of the blade shaft is R3. A ratio of (R2-R1):(R3-R2) is K2, and 0.2≤K2≤0.5. Within the range of the K2 value, the effective cutting space is ensured, and the food material can be frequently pushed into the cutting space by the turbulence rib to be frequently cut by the lower blade, so that the whipping effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic view of a food processor according to an example embodiment of the present application;

[0023] Figure 2 is a sectional view of a cup assembly;

[0024] Figure 3 is a front view of a stirring blade;

[0025] Figure 4 is a top view of the stirring blade;

[0026] Figure 5 is an analysis diagram of centrifugal forces of the upper blade and the lower blade;

[0027] Figure 6 is a further top view of the stirring blade;

[0028] Figure 7 is a front view of a further example of the stirring blade;

[0029] Figure 8 is a top view of a cup assembly. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments (or, “modes of implementation”) of the present application will be described clearly and completely in conjunction with the accompanying drawings. In the following description, the same numbers in different drawings represent the same or similar elements unless otherwise indicated.

[0031] If the application embodiments involve the terms of direction indication or position relationship (for example, up, down, left, right, front, back, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative position relationship, motion condition, etc. between components in a certain specific posture (as shown in the drawings); if the specific posture changes, the direction indication or position relationship will also change accordingly. In addition, the terms "first", "second", etc. in the application embodiments are only used for convenience of description, and cannot be understood as indicating or implying relative importance.

[0032] Please refer to Figure 1 and Figure 2 , Figure 1 is a schematic view of a food processor 100 shown in an exemplary embodiment of the application. Figure 2 is a cross-sectional view of the cup assembly 20.

[0033] The application provides a food processor 100, which comprises a main machine 10 and a cup assembly 20, the cup assembly 20 is installed on the main machine 10, including but not limited to detachable installation, the main machine 10 can be set as a base type main machine, and the cup assembly 20 is installed on the top of the main machine 10.

[0034] The cup assembly 20 comprises a cup body 21 and a stirring blade 22, the cup body 21 is provided with a cup cavity 210, and the stirring blade 22 is rotatably installed on the cup body 21, the blade of the stirring blade 22 is located in the cup cavity 210, and is used for beating and crushing food materials in the cup cavity 210.

[0035] Please refer to Figure 3 and Figure 4 , Figure 3 is a front view of the stirring blade 22. Figure 4 is a top view of the stirring blade 22.

[0036] The stirring blade 22 comprises a blade shaft 220 and an upper blade 221 and a lower blade 222 connected to the blade shaft 220, the upper blade 221 is located above the lower blade 222, and the upper blade 221 and the lower blade 222 rotate with the blade shaft 220. The lower blade 222 is a plane blade, the upper blade 221 is upwardly bent, the maximum diameter D2 of a circle where the blade tip of the upper blade 221 is located and the maximum diameter D1 of a circle where the blade tip of the lower blade 222 is located have a ratio K, and 0.2≤K≤0.6. Here, the maximum diameter refers to the diameter of a circle where the blade tip of a leaf with the largest radial dimension is located when the upper blade 221 or the lower blade 222 comprises multiple leaves. In the embodiment shown in Figure 4 the upper blade 221 has multiple leaves, and the radial dimensions of the leaves are equal, and the lower blade 222 has multiple leaves, and the radial dimensions of the leaves are equal.

[0037] According to the above description, the lower blade 222 is provided as a flat blade, the cutting surface of the blade part of the lower blade 222 is flat, the centrifugal force generated is relatively large, the centrifugal force is more concentrated, and the food material can be cut more finely. In addition, 0.2≤K≤0.6, the radial dimension of the upper blade 221 is small, the centrifugal force generated is relatively small, therefore, the lower blade 222 can be used as the main cutting blade, and the upper blade 221 is used to reduce the turbulence vortex of the lower blade 222, which can reduce noise and load. In an alternative embodiment, K can be 0.2, 0.3, 0.4, 0.5, 0.6, but is not limited thereto.

[0038] In an embodiment, at least one of the upper blade 221 and the lower blade 222 is provided as a trident. For example, the upper blade 221 adopts a trident with all the blade leaves upwardly bent; or the lower blade 222 adopts a trident with all the blade leaves flat, in this embodiment, the upper blade 221 and the lower blade 222 are both tridents. Any two blade leaves of the trident are not symmetrical about the plane passing through the blade shaft axis, have good dynamic balance, and have low noise.

[0039] In an embodiment, any blade leaf of the upper blade 221 is circumferentially staggered with any blade leaf of the lower blade 222 along the blade shaft. In this way, the blade leaves of the stirring blade 22 respectively extend in different directions, the blade leaves are more dispersed, the turbulence effect is better, large or more concentrated vortex is avoided, and noise and load are further reduced.

[0040] In an embodiment, the upper blade 221 includes a plurality of upper blade leaves 2210, each of the upper blade leaves 2210 is uniformly distributed in the circumferential direction of the blade shaft, and the angle between any two of the upper blade leaves 2210 is not equal to 180°. The lower blade 222 includes a plurality of lower blade leaves 2220, each of the lower blade leaves 2220 is uniformly distributed in the circumferential direction of the blade shaft, and the angle between any two of the lower blade leaves 2220 is not equal to 180°. In this way, any two of the plurality of upper blade leaves 2210 and / or the plurality of lower blade leaves 2220 are not symmetrical about the plane passing through the blade shaft axis, resonance is avoided, and noise is increased. In Figure 4 In the illustrated embodiment, the upper blade 221 includes three upper blade leaves 2210, each of the upper blade leaves 2210 is uniformly distributed in the circumferential direction of the blade shaft, and is spaced apart from each other by 120°.

[0041] In an embodiment, the upper blade 221 comprises a plurality of upper blade leaves 2210, and the lower blade 222 comprises a plurality of lower blade leaves 2220, and the specific number of the upper blade leaves 2210 and the lower blade leaves 2220 is not limited. Among them, the plurality of upper blade leaves 2210 are uniformly distributed in the circumferential direction of the blade shaft, and the plurality of lower blade leaves 2220 are uniformly distributed in the circumferential direction of the blade shaft. In the orthographic projection along the axial direction of the blade shaft, there is one lower blade leaf 2220 between any two adjacent upper blade leaves 2210, and there is one upper blade leaf 2210 between any two adjacent lower blade leaves 2220. In this way, the blade leaves of the upper and lower blades are alternately distributed, the blade leaves are more dispersed, the convection between the upper and lower food materials is better, and the food materials can be beaten more finely. Figure 4 In the illustrated embodiment, the upper blade 221 comprises three upper blade leaves 2210, and the lower blade 222 comprises three lower blade leaves 2220, but is not limited thereto.

[0042] Please refer to Figure 5 , Figure 5 for the analysis diagram of the centrifugal force of the upper blade 221 and the lower blade 222.

[0043] The centrifugal force of the upper blade 221 is F1, and the centrifugal force of the lower blade 222 is F, F1<F, and the centrifugal force of the lower blade 222 is more concentrated. As the main cutting and crushing blade, the beaten food material such as beans is more easily crushed under the cutting action of the centrifugal force F, and the crushing efficiency is higher.

[0044] Please refer to Figure 6 , Figure 6 for another plan view of the stirring blade 22.

[0045] In an embodiment, any two adjacent upper blade leaves 2210 are spaced apart by a first angle a, and the lower blade leaf 2220 projected between the adjacent two upper blade leaves 2210 is located in the middle of the first angle a. In the embodiment in which the upper blade leaf 2210 is provided with three, the first angle a is 120°, and the lower blade leaf 2220 projected between the adjacent two upper blade leaves 2210 is spaced apart from the adjacent two upper blade leaves 2210 by 60° respectively. In this way, the upper blade leaves 2210 and the lower blade leaves 2220 are alternately and uniformly distributed, the turbulence is more uniform, and the turbulence effect is better.

[0046] In one embodiment, any two adjacent lower blades are spaced apart by a second angle β, and the upper blade 2210 projected between the two adjacent lower blades 2220 is located in the middle of the second angle β. In the embodiment where three lower blades 2220 are provided, the second angle β is 120°, and the upper blade 2210 projected between the two adjacent lower blades 2220 is spaced apart from the two adjacent lower blades 2220 by 60° respectively. In this way, the upper blades 2210 and the lower blades 2220 are alternately and uniformly distributed, the turbulence is more uniform, and the turbulence effect is better.

[0047] In one embodiment, the upper blade 221 is bent upward by an angle C, and 30°≤C≤85°. The bending angle C is set between 30° and 85°, and the centrifugal force generated when the upper blade 221 rotates is appropriate, which is used to balance the vortex generated by the lower blade 222, to reduce the load and noise.

[0048] In an alternative embodiment, the bending angle C can be 30°, 40°, 50°, 60°, 70°, 80°, 85°, but is not limited thereto.

[0049] Please refer to Figure 7 , Figure 7 is a front view of another embodiment of the stirring blade.

[0050] In one embodiment, the axial spacing between the upper blade 221 and the lower blade 222 is H2, and 0≤H2≤20mm. In a specific embodiment, the axial spacing distance H2 can be 0mm, 5mm, 10mm, 15mm, 20mm. The larger the spacing distance H2, the larger the axial size of the stirring blade 22, and the better the turbulence effect.

[0051] Please refer to Figure 2 In one embodiment, the cup body 21 further comprises a cup bottom 211 located at the bottommost part, and the axial distance between the tip of the lower blade 223 of the stirring blade and the cup bottom 211 is H1, and 6mm≤H1≤50mm. This distance can avoid the stirring blade 22 from touching the cup bottom 211, and in addition, it can also disturb the food materials at the cup bottom 211 to prevent the occurrence of bottom paste. In an alternative embodiment, the axial distance H1 can be 6mm, 10mm, 20mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, but is not limited thereto. For example, the axial distance H1 can be specifically set to 20mm.

[0052] Please refer to Figure 8 , Figure 8 is a top view of the cup assembly 20.

[0053] In one embodiment, the inner wall of the cup 21 is provided with a radial protrusion 212, the maximum distance from the cutting edge of the upper blade 221 to the center of the cutter shaft is R1, the maximum distance from the cutting edge of the lower blade 222 to the center of the cutter shaft is R2, the radial distance from the protruding end of the radial protrusion 212 to the center of the cutter shaft O is R3, and the ratio of (R3-R2):(R2-R1) is K2, 0.2≤K2≤0.5. The annular area between the cutting edge of the upper blade 221 and the cutting edge of the lower blade 222 is the effective cutting annular area of the stirring blade 22, and the width of the annular area is R2-R1. The radial protrusion 212 forms a turbulence area outside the effective cutting annular area, and the width of the turbulence area is R3-R2. Within the range of the above K2 value, the effective cutting space is ensured, and the food material can be frequently pushed into the cutting space by the turbulence effect of the radial protrusion 212, so that the food material can be frequently cut by the lower blade 222, and the whipping effect is better. In a specific embodiment, K2 can be selected as 0.2, 0.3, 0.4, 0.5, but is not limited thereto.

[0054] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A stirring blade, characterized by, The application relates to a stirring knife assembly. The stirring knife assembly comprises a knife shaft (220), an upper blade (221) and a lower blade (222) connected to the knife shaft (220), the upper blade (221) is located above the lower blade (222), the lower blade (222) is a flat blade, the upper blade (221) is upwardly bent, the maximum diameter of a circle with the knife tip of the upper blade (221) as the center is K times the maximum diameter of a circle with the knife tip of the lower blade (222) as the center, and 0.2<=K<=0.

6. Any blade of the upper blade (221) is circumferentially staggered with any blade of the lower blade (222) along the knife shaft.

2. The mixing blade according to claim 1, wherein The upper blade (221) comprises a plurality of upper blades (2210), each of the upper blades (2210) is uniformly distributed along the circumferential direction of the knife shaft, and the angle between any two upper blades (2210) is not equal to 180 degrees; and / or 3. The mixing blade of claim 1, wherein The lower blade (222) comprises a plurality of lower blades (2220), each of the lower blades (2220) is uniformly distributed along the circumferential direction of the knife shaft, and the angle between any two lower blades (2220) is not equal to 180 degrees. The upper blade (221) comprises a plurality of upper blades (2210), the lower blade (222) comprises a plurality of lower blades (2220), the plurality of upper blades (2210) are uniformly distributed along the circumferential direction of the knife shaft, the plurality of lower blades (2220) are uniformly distributed along the circumferential direction of the knife shaft, and in the projection along the axial direction of the knife shaft, there is one lower blade (2220) between any two adjacent upper blades (2210), and there is one upper blade (2210) between any two adjacent lower blades (2220).

4. The mixing blade of claim 1, wherein Any two adjacent upper blades (2210) are separated by a first angle, and the lower blade (2220) projected between the two adjacent upper blades (2210) is located in the middle of the first angle; and / or 5. The mixing blade of claim 4, wherein Any two adjacent lower blades (2220) are separated by a second angle, and the upper blade (2210) projected between the two adjacent lower blades (2220) is located in the middle of the second angle. The upper blade (221) is upwardly bent by an angle C, and 30<=C<=85.

6. The mixing blade according to any one of claims 1 to 5, wherein At least one of the upper blade (221) and the lower blade (222) is provided as a trident; and / or 7. The mixing blade according to any one of claims 1 to 5, wherein The axial distance between the upper blade (221) and the lower blade (222) is H2, and 0<=H2<=20mm. The application relates to a stirring knife assembly.

8. A food processor, characterized in that, The stirring knife assembly comprises a main machine (10) and a cup assembly (20), the cup assembly (20) comprises a cup body (21) and a stirring knife (22) as claimed in any one of claims 1 to 7, the cup body (21) is provided with a cup cavity (210), the stirring knife (22) is rotatably installed on the cup body (21), and the blade of the stirring knife (22) is arranged in the cup cavity (210). The cup body (21) comprises a cup bottom (211) located at the bottom, and the axial distance between the lower blade (222) of the stirring knife (22) and the cup bottom (211) is H1, and 6mm<=H1<=50mm. ​ 9. The food processor of claim 8, wherein, ​ 10. The food processor of claim 8, wherein, The inner wall of the cup body (21) is provided with a turbulence rib (212) protruding radially along the cutter shaft, the maximum distance of the cutter tip of the upper blade (221) from the axis of the cutter shaft is R1, the maximum distance of the cutter tip of the lower blade (222) from the axis of the cutter shaft is R2, the radial distance of the protruding end of the turbulence rib (212) from the axis of the cutter shaft is R3, and the ratio of (R2-R1):(R3-R2) is K2, 0.2≤K2≤0.5.

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