Knife assembly, food processor and food processor

Abstract

This application discloses a blade assembly, a blending cup, and a blender. The blade assembly includes a blade shaft and a blade. The blade includes a blade root and a first blade wing. The blade root is connected to the blade shaft, and the first blade wing is connected to the side of the blade root away from the blade shaft and rotates with the blade shaft. The first blade wing has a cutting edge. The cutting edge profile includes a first segment near or connected to the blade root and a second segment near or connected to the free end of the first blade wing. The curvature of the second segment is greater than that of the first segment. The blade assembly of this application can improve the blender's ability to process different ingredients, meeting users' needs for processing various ingredients.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to a knife assembly, a food processor cup, and a food processor. Background Technology

[0002] Food processors, such as blenders, soy milk makers, and mixers, are household appliances that crush and blend food. They use high-speed rotating blades to cut and crush ingredients such as fruits, vegetables, and ice to make them into pastes or finely chopped foods.

[0003] In related technologies, the blade outline of food processors is mostly a single arc line with a fixed curvature and a constant cutting angle. This blade structure can only efficiently cut specific ingredients when rotating at high speeds, such as soft fruits, but it is prone to incomplete cutting of hard ice, affecting the pulverizing effect and failing to meet users' needs for processing different ingredients. Utility Model Content

[0004] This application provides a blade assembly, a food processor cup, and a food processor, which can improve the food processor's pulverizing effect on different ingredients and meet users' needs for processing different ingredients.

[0005] To achieve the above objectives, a first aspect of this application provides a blade assembly, comprising: The cutter shaft; and The cutting tool includes a root portion and a first blade wing. The root portion is connected to the cutting axis. The first blade wing is connected to the side of the root portion away from the cutting axis and rotates together with the cutting axis. The first blade wing has a cutting edge portion. The cutting edge profile of the cutting edge portion includes a first segment close to or connected to the root portion and a second segment close to or connected to the free end of the first blade wing. The curvature of the second segment is greater than the curvature of the first segment.

[0006] In some embodiments, the length of the first segment is greater than the length of the second segment; And / or, the curvature of the first segment is set to increase in a direction away from the cutter axis; And / or, the curvature of the second segment is set to increase in a direction away from the cutter axis.

[0007] In some embodiments, a first ray and a second ray are formed with any point on the first segment as the endpoint, and the angle between the first ray and the second ray is defined as the first cutting angle α1; Wherein, the extension direction of the first ray is the direction of the first blade, and the second ray is tangent to the first segment along the direction close to the first blade, 50°≤α1≤65°.

[0008] In some embodiments, the curvature of the second segment is greater than that of the first segment, and the curvature of the second segment is set to increase in a direction away from the cutter axis.

[0009] In some embodiments, a third ray and a fourth ray are formed with any point on the second segment as the endpoint, and the included angle between the third ray and the fourth ray is defined as the second cutting angle α2. Wherein, the extension direction of the third ray is the turning direction of the first blade, and the fourth ray is tangent to the second segment along the turning direction close to the first blade, 35°≤α2≤50°; And / or, the blade profile of the blade portion is a cycloid.

[0010] In some embodiments, a third ray and a fourth ray are formed with any point on the second segment as the endpoint, and the included angle between the third ray and the fourth ray is defined as the second cutting angle α2. Wherein, the extension direction of the third ray is the turning direction of the first blade, and the fourth ray is tangent to the second segment along the turning direction close to the first blade, 47°≤α2≤50°; And / or, the blade profile of the blade portion is a parabola.

[0011] In some embodiments, the cutting tool further includes a root portion, and a reference line is provided at the connection between the first blade and the root portion, wherein the line connecting the midpoint of the reference line and the center of the cutting axis is perpendicular to the reference line; At least one of the first blade wings is bent downwards, and the angle between the bending line of the first blade wing and the reference line toward the blade edge of the first blade wing is α5, where 1°≤α5≤3°.

[0012] In some embodiments, the cutting tool further includes: The second blade wing is located on the periphery of the blade shaft and is bent upwards; At least one of the first blades is bent downwards.

[0013] In some embodiments, the bending angle α3 of the first blade wing satisfies: 15°≤α3≤25°; And / or, the bending angle α4 of the second blade satisfies: 50°≤α4≤65°.

[0014] In some embodiments, the length of the first blade is greater than the length of the second blade, and the rotation diameter D1 at the end of the first blade and the rotation diameter D2 at the end of the second blade satisfy: D2≤0.6*D1.

[0015] In some embodiments, the first blade and the second blade are an integral structure, and the first blade and the second blade are arranged alternately at intervals along the circumference of the blade axis.

[0016] In some embodiments, the first blade and the second blade are separate structures and are stacked along the blade axis, wherein the second blade is located above the first blade.

[0017] In some embodiments, the cutting tool includes a first blade and a second blade stacked along the axial direction of the cutting axis, the second blade including a second blade wing; The first blade includes a root portion and a first blade wing. The root portion is connected to the blade shaft, and a plurality of the first blade wings are circumferentially spaced and connected to the periphery of the root portion.

[0018] In some embodiments, the connection between the first blade wing and the blade root has a reference line, and the line connecting the midpoint of the reference line and the center of the blade axis is perpendicular to the reference line; At least one of the first blade wings is bent upwards, and the angle between the bending line of the first blade wing and the reference line toward the back of the first blade wing is α6, where 1°≤α6≤3°.

[0019] In some embodiments, at least one of the first blade wings is horizontally arranged, at least one of the first blade wings is bent upwards, and at least one of the first blade wings is bent downwards. The horizontally arranged first blade wings, the upwardly bent first blade wings, and the downwardly bent first blade wings are arranged alternately along the circumference of the blade root.

[0020] A second aspect of this application provides a cooking cup, comprising: The cup body has a food processing chamber; and The knife assembly as described in the above embodiment is disposed on the cup body and extends into the food processing cavity.

[0021] A third aspect of this application provides a food processor, comprising: Base; and The cooking cup described in the above embodiment is mounted on the base.

[0022] In the knife assembly provided in this application embodiment, the first blade includes a first segment near or connected to the root of the blade, and a second segment near or connected to the free end of the first blade (i.e., the end away from the root of the blade), and the curvature of the second segment is greater than that of the first segment. Curvature is a parameter of the degree of curvature of the blade profile. Combining the relationship between the cutting angle of the first blade and the curvature, the smaller the curvature, the straighter the blade profile, and the larger the cutting angle; the larger the curvature, the more curved the blade profile, and the smaller the cutting angle. The starting end of the first segment near the blade axis (with the smallest curvature and the largest cutting angle) contacts the food. Due to the large cutting angle and the strong blade structure, the crushing force generated by the rotation is greater, which coarsely crushes large blocky foods (such as whole potatoes or apples) or hard foods (such as ice cubes or nuts), avoiding the problem of easy chipping or incomplete cutting when processing hard foods due to the fixed cutting angle of traditional single arc blades. As the food is initially crushed, it spreads towards the free end of the first blade, at which point the second segment of the blade profile (near the free end) begins to cut the food. Because the second section has a greater curvature and a smaller cutting angle, it can finely cut ingredients in this area (such as crushed ice particles), thereby improving the delicacy of the food processing.

[0023] The blade assembly in this embodiment, through the different curvatures of the first blade blade outline and the segmented design, meets the needs of coarse grinding of hard ingredients and fine grinding of soft ingredients, greatly improving the food processor's adaptability to different ingredients and satisfying users' needs for processing different ingredients. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the blade assembly in one embodiment of this application; Figure 2 This is a schematic diagram of the blade assembly in the first embodiment of this application from a top view. Figure 3 This is a schematic diagram of the tool's structure from a top-down view in the second embodiment of this application; Figure 4 This is a schematic diagram of the tool in the first embodiment of this application from a head-up view. Figure 5 for Figure 3 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the blade assembly in the third embodiment of this application; Figure 7 This is a schematic diagram of the blade assembly in the third embodiment of this application from a head-up view. Figure 8 This is a schematic diagram of the structure of the first blade in one embodiment of this application from a top view. Figure 9 This is a schematic diagram of the structure of the first blade in one embodiment of this application from a head-up view. Figure 10 for Figure 9 Enlarged view of point B in the middle.

[0026] Explanation of icon numbers: 1. Cutting shaft; 2. Cutting tool; 21. First cutting wing; 211. First section; 212. Second section; 213. First ray; 214. Second ray; 215. Third ray; 216. Fourth ray; 217. Cutting edge; 218. Back of the blade; 219. Baseline; 22. Second cutting wing; 23. Root of the blade; 24. First cutting edge; 25. Second cutting edge.

[0027] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0029] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0030] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] This application provides a food processor, which can be a high-speed blender, a soy milk maker, a mixer, etc.

[0033] The food processor in this embodiment includes a base and a food processor cup.

[0034] The base is the supporting component of the food processor, and it can house a drive motor or other power unit to provide power for the rotation of the blade assembly. When the food processor is started, the drive motor in the base is connected to the blade shaft 1 of the blade assembly through a transmission structure, driving the blade shaft 1 and the blades 2 to rotate at high speed, thereby cutting and pulverizing the food in the food processing chamber.

[0035] The food processor cup is mounted on the base and includes a cup body and a blade assembly. The cup body has a food processing chamber for holding the food to be processed. The cup body can be made of glass, plastic, or stainless steel, etc. The shape of the cup body can be cylindrical, conical, or other irregular shapes.

[0036] Among them, the blade assembly is the core component of the food processor for cutting and pulverizing food. However, in the existing technology, the blade outline of the food processor blade is usually a single arc line, and the cutting angle of the blade remains unchanged. This blade structure makes it difficult to adapt to the processing needs of different foods, thus affecting the pulverizing effect.

[0037] In response, this embodiment provides a blade assembly that can effectively pulverize different ingredients, meeting users' needs for processing various ingredients.

[0038] Specifically, please refer to Figure 1 and Figure 2 The tool assembly includes a tool shaft 1 and a tool 2. One end of the tool shaft 1 is connected to a drive motor inside the machine base, and the other end is connected to the tool 2. Under the drive of the drive motor, the tool 2 is rotated synchronously. In the figure, the Y direction is the rotation direction of the tool 2.

[0039] The blade 2 includes a blade root 23 and a first blade wing 21. The blade root 23 serves as a connecting component, and the blade shaft 1 can be connected by riveting, welding, keying, or other methods. The first blade wing 21 is connected to the side of the blade root 23 away from the blade shaft 1 and has a cutting edge 217. When the first blade wing 21 rotates at high speed with the blade shaft 1, the cutting edge 217 cuts and pulverizes the food. The first blade wing 21 is arranged around the blade shaft 1, and at least one is provided (2-6 can be designed according to the volume of the food processor or the food pulverization requirements, and can be symmetrically or evenly distributed). The first blade wing 21 is arranged around the blade shaft 1 so that when the blade 2 rotates at high speed, the cutting edge 217 of the first blade wing 21 can cover most of the food processing cavity inside the food processor, avoiding dead corners in food cutting.

[0040] The blade profile of the blade portion 217 includes a first segment 211 near or connected to the root of the blade 23, and a second segment 212 near or connected to the free end of the first blade wing 21 (i.e., the end away from the root of the blade 23), with the curvature of the second segment 212 being greater than that of the first segment 211. Thus, when the blade shaft 1 drives the first blade wing 21 to rotate, the food will spread from near the root of the blade 23 toward the free end under the action of centrifugal force, thereby passing through the two blade profiles with different curvatures (the first segment 211 and the second segment 212), and thus being cut and pulverized.

[0041] Curvature is a parameter describing the degree of curvature of the blade's outline. Considering the relationship between the cutting angle of the first blade wing 21 and its curvature, a smaller curvature results in a straighter blade outline and a larger cutting angle; a larger curvature results in a more curved blade outline and a smaller cutting angle. Therefore, the first segment 211 (near the blade root 23) has a smaller curvature, a larger cutting angle, a more robust structure, and stronger impact resistance. When large chunks of food (such as whole carrots) or hard foods (such as ice cubes or nuts) enter the area near the blade root 23, the first segment 211 cuts in at a larger angle, cutting the food into chunks or granules. This avoids the chipping or incomplete cutting problems that often occur with traditional single-arc blades when handling hard foods due to their fixed cutting angle.

[0042] As the ingredients are initially pulverized and spread towards the free end of the first blade wing 21, the second segment 212 of the blade outline (near the free end) begins to cut the ingredients. Because the second segment 212 has a greater curvature and a smaller cutting angle, it can finely cut the ingredients in this area (such as pulverized ice particles), thereby improving the delicacy of the food processing.

[0043] The blade assembly in this embodiment, through the different curvatures of the blade outline of the first blade wing 21 and the segmented design, meets the needs of coarse grinding of hard ingredients and fine grinding of soft ingredients, greatly improving the food adaptability of the food processor and meeting the user's needs for processing different ingredients.

[0044] In some embodiments, the length of the first segment 211 is greater than the length of the second segment 212. During the operation of the food processor, food tends to accumulate near the blade shaft 1 due to centrifugal force. In this embodiment, the first segment 211 is longer than the second segment 212, which allows the first blade 21 to form a longer cutting path in the cutting area (the main accumulation area of ​​food) near the blade shaft 1, so as to initially crush most of the food and improve crushing efficiency. Since the food far from the blade shaft 1 has been initially crushed, subsequent fine crushing can be completed without an excessively long blade. Therefore, the second segment 212 in this embodiment is designed to be shorter. At the same time, the short length of the second segment 212 can reduce the overall length of the blade outline, thereby reducing the air resistance experienced by the first blade 21 during high-speed rotation and reducing the operating noise of the food processor.

[0045] Furthermore, in some embodiments, the curvature of the first segment 211 increases in the direction away from the blade shaft 1. When the food processor is working, as the blade shaft 1 drives the first blade 21 to rotate at high speed, the starting end of the first segment 211 (with the smallest curvature and the largest cutting angle) near the blade shaft 1 comes into contact with the food, coarsely crushing large chunks of food (such as whole potatoes or apples) or hard food (such as ice cubes or nuts). As the blade outline extends away from the blade shaft 1, the curvature of the first segment 211 gradually increases, and the cutting angle also decreases. At this time, the first segment 211 only needs to finely cut the food that has been coarsely crushed (such as crushed ice cubes or softened fruit pieces), further crushing the food into a fine paste or fine pieces, improving the uniformity of food processing.

[0046] like Figure 2 As shown, in some embodiments, the first segment 211 of the blade outline of the first blade wing 21 has a first cutting angle α1. Specifically, taking any point on the first segment 211 as an endpoint, a first ray 213 and a second ray 214 are formed respectively, wherein the extension direction of the first ray 213 is consistent with the turning direction of the first blade wing 21, and the second ray 214 is tangent to the first segment 211 at that point along a direction close to the turning direction of the first blade wing 21, and the value range of the first cutting angle α1 is limited to 50°≤α1≤65°.

[0047] The first cutting angle α1 is the angle at which the first segment 211 of the blade outline cuts into the food. When the food enters the food processing chamber, the first segment 211 near the blade shaft 1 contacts the food. The angle is 50°≤α1≤65°, which is a relatively large range. That is, the angle at which the first segment 211 cuts into the food is larger. A larger cutting angle can generate a stronger crushing force, thereby quickly crushing hard food into blocks or granules, completing the initial coarse powdering of the food.

[0048] In one embodiment, such as Figure 2As shown, the overall blade contour formed by connecting the first segment 211 and the second segment 212 can adopt a cycloidal structure. When the food rotates with the first blade 21, it will undergo radial displacement due to centrifugal force. The cycloidal contour allows the blade contour to better match the movement trajectory of the food, avoiding "missed cuts" and improving processing efficiency.

[0049] In this embodiment, corresponding to the first cutting angle α1 of the first segment 211, the second segment 212 of the blade outline of the first blade wing 21 has a second cutting angle α2. Specifically, taking any point on the second segment 212 as the endpoint, a third ray 215 and a fourth ray 216 are formed. The extension direction of the third ray 215 is the same as the turning direction of the first blade wing 21, and the fourth ray 216 is tangent to the second segment 212 at that point along the direction close to the turning direction of the first blade wing 21. The value range of the second cutting angle α2 is 35°≤α2≤50°.

[0050] In this embodiment, the second segment 212 is used to process the ingredients that have been pre-processed by the first segment 211. It processes ingredients that are smaller in size and lower in hardness. Therefore, the value range of α2 is less than or equal to α1, and the corresponding cutting angle is smaller, so as to further pulverize and refine the fineness of the food.

[0051] In another embodiment, such as Figure 3 As shown, the blade profile of the blade portion 217 can adopt a parabolic structure.

[0052] In this embodiment, corresponding to the first cutting angle α1 of the first segment 211, the second segment 212 of the blade outline of the first blade wing 21 has a second cutting angle α2. Specifically, taking any point on the second segment 212 as an endpoint, a third ray 215 and a fourth ray 216 are formed respectively: the extension direction of the third ray 215 is the same as the turning direction of the first blade wing 21, and the fourth ray 216 is tangent to the second segment 212 at that point along the direction close to the turning direction of the first blade wing 21, and the second cutting angle α2 satisfies 47°≤α2≤50°.

[0053] When the first blade 21 rotates at high speed with the blade shaft 1, the second section 212 near the free end is the area where it most violently impacts the water flow and food. This area is prone to forming eddies due to water flow turbulence, which not only generates noise but also reduces the fineness of the food cutting. In this embodiment, the second cutting angle α2 satisfies 47°≤α2≤50°, and the second cutting angle α2 is greater than 45°. The larger cutting angle allows the blade 217 to push away the water flow more smoothly during rotation, thereby reducing the intensity of eddies in the free end area and thus reducing noise.

[0054] The experimental data in the table below also verify the above effect:

[0055] The parabolic blade with a second cutting angle of 50° produced a soy milk stirring noise of 68.2dB(A), which is significantly lower than that of the comparative blades with a cutting angle of 28° (71.1dB(A)) and 40° (70.7dB(A)), verifying the effect of angle design on noise reduction.

[0056] Meanwhile, the α2 angle of 47°-50° not only reduces noise but also improves the cutting efficiency of the second section 212 of the blade 217. In the experiment, the 50° parabolic blade produced 2.19g of residue, which was lower than the 2.64g and 2.42g of the control blade, indicating that the 50° parabolic blade can more thoroughly cut small ingredients (such as soybean residue particles in soy milk) in the free end area of ​​the first blade wing 21, thus improving the fineness of the food processing.

[0057] In some embodiments, the cutting tool 2 further includes a second cutting wing 22, and both the second cutting wing 22 and the first cutting wing 21 are disposed around the cutting shaft 1, wherein at least one of the first cutting wing 21 is bent downward and the second cutting wing 22 is bent upward.

[0058] When the food processor is working, the high-speed rotating blades 2 create a swirling vortex in the water flow within the food processing chamber. Food moves with the water flow and is cut by the blades. The first blade 21 bends downwards with its cutting edge facing downwards, generating a downward thrust as it rotates, pushing the water flow downwards. The second blade 22 bends upwards with its cutting edge facing upwards, creating an upward disturbance in the upward water flow as it rotates. The two blades work together to expand the vertical cutting range of the blades 2, covering more area within the food processor cup and avoiding the problem of insufficient food processing caused by traditional flat blades that can only cut on a single horizontal plane.

[0059] Meanwhile, the upward-bending second blade 22 disrupts the conical vortex formed by the water flow. When the blade 2 rotates at high speed, the water flow easily forms an upward conical vortex in the central area, causing the food to gather above the blade 2 and making it difficult to reach the blade. The upward-bending structure of the second blade 22 allows its cutting edge to directly cut into the upper area of ​​the vortex, breaking up the gathered food and ensuring that the food is evenly stressed. The downward-bending first blade 21 creates a circulation by pushing the water flow: the downward-pushed water bounces back at the bottom of the cup and flows upward, forming a circulation path with the water flow disturbed by the second blade 22 above. This allows the food to be repeatedly cut by the blade in the circulating water flow, improving the uniformity of the crushing.

[0060] Furthermore, in some embodiments, the bending angle α3 of the first blade 21 satisfies 15°≤α3≤25°, and the bending angle α4 of the second blade 22 satisfies 50°≤α4≤65°.

[0061] Regarding the bending angle α3 of the first blade 21, if α3 is less than 15°, the bending degree of the first blade 21 is insufficient, the downward thrust is weak, and it is difficult to drive the water flow to form an effective circulation, causing food to easily accumulate locally; if α3 is greater than 25°, the first blade 21 is excessively tilted downward, and the contact angle between the blade edge and the food is too large, which will reduce the cutting efficiency of the blade 217 on the food and affect the fine pulverization effect. In this embodiment, the value range of α3 can form a stable circulating water flow while ensuring that the first blade 21 effectively cuts the food it passes through.

[0062] Regarding the bending angle α4 of the second blade 22, if α4 is less than 50°, the second blade 22 will not bend upwards sufficiently, and the blade edge will have difficulty reaching the upper area of ​​the vortex, thus failing to effectively disperse the gathered food. If α4 is greater than 65°, the second blade 22 will be tilted upwards excessively, and will be subject to greater water flow resistance during rotation. This will not only increase energy consumption and noise, but may also cause the second blade 22 to vibrate due to excessive resistance, affecting the cutting stability.

[0063] In some embodiments, the length of the first blade 21 is greater than the length of the second blade 22, and the rotation diameter D1 at the end of the first blade 21 and the rotation diameter D2 at the end of the second blade 22 satisfy D2≤0.6*D1.

[0064] When the food processor is working, the outer area near the cup wall has a larger space and is the main area for the movement and cutting of ingredients. It requires a longer blade to cover this area to improve processing efficiency. The first blade 21 is longer and has a larger rotation diameter D1, responsible for the coarse and fine grinding of most ingredients. The second blade 22 is shorter and has a smaller rotation diameter D2 (not exceeding 60% of D1). Its rotation trajectory is concentrated in the inner area near the blade shaft 1. This area is a cone-shaped vortex. The shorter second blade 22 is used to process ingredients that are gathered in the center. Combined with the upward bending angle, it can effectively break up the gathered ingredients.

[0065] Meanwhile, D2≤0.6*D1 ensures that the second blade 22 does not extend excessively outward, saving materials and avoiding airflow interference with the first blade 21 during high-speed rotation, thereby reducing noise and energy consumption and improving the overall working stability of the blade assembly.

[0066] Please see Figures 2 to 5 In some embodiments, the first blade wing 21 is connected to the periphery of the blade root 23, and a reference line 219 is provided at the connection between the first blade wing 21 and the blade root 23. The line connecting the midpoint of the reference line 219 and the center of the blade shaft 1 is perpendicular to the reference line 219. At least one first blade wing 21 is bent downward, and the angle α5 formed by the bending line and the reference line 219 toward the blade 217 of the first blade wing 21 satisfies 1°≤α5≤3°.

[0067] In this embodiment, the first blade wing 21 bends downwards not vertically along the baseline 219, but rather deviates from the baseline 219 and bends downwards at an angle α5. When the first blade wing 21 bends downwards at an angle α5, the blade edge 217 will be slightly higher than the back of the blade 218 in the vertical direction (i.e., the blade edge 217 side is higher than the back of the blade 218 side). Thus, when the first blade wing 21 rotates, the blade edge contacts and cuts the food first, and then the back of the blade 218 pushes the water flow downwards, making it easier to form a stable circulating water flow.

[0068] In some embodiments, such as Figure 1 As shown, the first blade 21 and the second blade 22 are an integral structure, and the first blade 21 and the second blade 22 are arranged alternately along the circumference of the blade shaft 1. The integral structure is simple, easy to install and disassemble, convenient for daily cleaning and maintenance by users, and also improves the overall structural strength of the tool 2.

[0069] For example, the blade 2 may be equipped with three downward-bending first blades 21 and three upward-bending second blades 22, which are evenly spaced along the circumference of the blade shaft 1 (the angle between two adjacent blades is 60°). When the blade shaft 1 drives the blade 2 to rotate, the alternating first blades 21 (bending downward) and second blades 22 (bending upward) can form a continuous and seamless cutting path in the circumference. The downward-bending first blades 21 push the water flow downward to form a circulation, while the upward-bending second blades 22 disrupt the conical vortex in the central area, preventing food from accumulating.

[0070] Please see Figure 6 and Figure 7 In some embodiments, the first blade 21 and the second blade 22 are separate structures and are stacked along the axial direction of the blade shaft 1, wherein the second blade 22 is located above the first blade 21.

[0071] With its split design, if one blade wears or is damaged, there is no need to replace the entire tool 2; only the corresponding blade needs to be replaced, thus reducing the user's operating costs.

[0072] Positioning the second blade 22 (bent upwards) above the first blade 21 (bent downwards) allows it to target the food gathered at the top: the upward-bent blade directly cuts into the upper vortex, breaking up the gathered food and pushing it downwards into the cutting range of the first blade 21. The lower first blade 21 further pushes the food and water downwards, creating a complete circulating water flow. This avoids the problem of a single horizontal blade failing to cover the upper and lower areas, ensuring that food at different axial positions can be effectively cut, thus improving overall pulverization efficiency.

[0073] In some embodiments, the cutting tool 2 includes a first blade 24 and a second blade 25 stacked along the axial direction of the cutting shaft 1, wherein the second blade 25 includes a second blade wing 22, the first blade 24 includes a root portion 23 and a first blade wing 21, the root portion 23 is connected to the cutting shaft 1, and a plurality of first blade wings 21 are connected to the periphery of the root portion 23 along the circumferential direction of the root portion 23.

[0074] The blade root 23 can be fixed to the blade shaft 1 by riveting, welding, keying, etc., to ensure that slippage or loosening does not occur during high-speed rotation, and to provide stable cutting power for the first blade wing 21. The connection between the blade root 23 and the first blade wing 21 can be integrally formed, welded, etc.

[0075] Multiple first blades 21 are arranged circumferentially along the root of the blade 23 (e.g., 6 first blades 21 spaced at 60° intervals), which can form a uniform cutting coverage on the horizontal plane and avoid cutting dead angles; while the axial stacking of the second blade 25 and the first blade 24 can flexibly adjust the position of the second blade 25 according to the height of the cooking cup (e.g., for short cups, the second blade 25 can be set close to the first blade 24, and for tall cups, the distance between the two can be increased), improving the adaptability of the knife 2.

[0076] Please see Figures 8 to 10 In some embodiments, a reference line 219 is provided at the connection between the first blade wing 21 and the blade root 23, and the line connecting the midpoint of the reference line 219 and the center of the blade shaft 1 is perpendicular to the reference line 219; at least one first blade wing 21 is bent upward, and the angle α6 formed by the bending line and the reference line 219 toward the blade back 218 of the first blade wing 21 satisfies 1°≤α6≤3°.

[0077] In this embodiment, the first blade wing 21 does not bend vertically along the baseline 219, but rather bends upward at an angle α6, deviating from the baseline 219. When the first blade wing 21 bends upward at an angle α6, the blade edge 217 will be slightly higher than the back of the blade 218 in the vertical direction (i.e., the blade edge 217 side is higher than the back of the blade 218 side). Thus, when the blade wing rotates, the blade edge contacts and cuts the food first, and then the back of the blade 218 pushes the water flow downward, making it easier to form a stable circulating water flow.

[0078] In some embodiments, such as Figure 6 and Figure 7 As shown, the first blade wing 21 has three bending forms: at least one horizontally positioned, at least one bent upwards, and at least one bent downwards, and these three forms of the first blade wing 21 are arranged alternately along the circumference of the blade root 23.

[0079] The three types of first blade wings 21 expand the cutting range axially, and the upward-bending and downward-bending first blade wings 21 can push the water flow downward to form a circulating water flow. For example, the first blade 24 includes two horizontal first blade wings 21, two upward-bending first blade wings 21, and two downward-bending first blade wings 21. The six first blade wings 21 are arranged alternately in the circumferential direction (e.g., horizontal, upward, and downward spaced 60° apart). This arrangement allows the food to circulate without dead angles in the processing chamber, repeatedly passing through the blade portions 217 in different directions. This ensures both coarse pulverization of hard food and fine cutting of soft food, thereby improving the uniformity and fineness of food pulverization.

[0080] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0081] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A knife assembly characterized by, include: Cutter shaft; as well as The cutting tool includes a root portion and a first blade wing. The root portion is connected to the cutting axis. The first blade wing is connected to the side of the root portion away from the cutting axis and rotates together with the cutting axis. The first blade wing has a cutting edge portion. The cutting edge profile of the cutting edge portion includes a first segment close to or connected to the root portion and a second segment close to or connected to the free end of the first blade wing. The curvature of the second segment is greater than the curvature of the first segment.

2. The knife assembly of claim 1, wherein, The length of the first segment is greater than the length of the second segment; And / or, the curvature of the first segment is set to increase in a direction away from the cutter axis; And / or, the curvature of the second segment is set to increase in a direction away from the cutter axis.

3. The knife assembly of claim 1, wherein, A first ray and a second ray are formed with any point on the first segment as the endpoint, and the angle between the first ray and the second ray is defined as the first cutting angle α1; Wherein, the extension direction of the first ray is the direction of the first blade, and the second ray is tangent to the first segment along the direction close to the first blade, 50°≤α1≤65°.

4. The knife assembly of claim 3, wherein, A third ray and a fourth ray are formed with any point on the second segment as the endpoint, and the angle between the third ray and the fourth ray is defined as the second cutting angle α2; Wherein, the extension direction of the third ray is the turning direction of the first blade, and the fourth ray is tangent to the second segment along the turning direction close to the first blade, 35°≤α2≤50°; And / or, the blade profile of the blade portion is a cycloid.

5. The blade assembly as described in claim 3, characterized in that, A third ray and a fourth ray are formed with any point on the second segment as the endpoint, and the angle between the third ray and the fourth ray is defined as the second cutting angle α2; Wherein, the extension direction of the third ray is the turning direction of the first blade, and the fourth ray is tangent to the second segment along the turning direction close to the first blade, 47°≤α2≤50°; And / or, the blade profile of the blade portion is a parabola.

6. The blade assembly as claimed in claim 1, characterized in that, The connection between the first blade wing and the blade root has a reference line, and the line connecting the midpoint of the reference line and the center of the blade axis is perpendicular to the reference line; At least one of the first blade wings is bent downwards, and the angle between the bending line of the first blade wing and the reference line toward the blade edge of the first blade wing is α5, where 1°≤α5≤3°.

7. The blade assembly as claimed in claim 1, characterized in that, The cutting tool also includes: The second blade wing is located on the periphery of the blade shaft and is bent upwards; At least one of the first blades is bent downwards.

8. The blade assembly as claimed in claim 7, characterized in that, The bending angle α3 of the first blade wing satisfies: 15°≤α3≤25°; And / or, the bending angle α4 of the second blade satisfies: 50°≤α4≤65°.

9. The blade assembly as claimed in claim 7, characterized in that, The length of the first blade is greater than the length of the second blade, and the rotation diameter D1 at the end of the first blade and the rotation diameter D2 at the end of the second blade satisfy: D2≤0.6*D1.

10. The blade assembly as claimed in claim 7, characterized in that, The first blade and the second blade are an integral structure, and the first blade and the second blade are arranged alternately along the circumference of the blade axis.

11. The blade assembly as claimed in claim 7, wherein the first blade and the second blade are separate structures and are stacked along the blade axis, wherein... The second blade is located above the first blade.

12. The blade assembly as claimed in claim 11, characterized in that, The cutting tool includes a first blade and a second blade stacked along the axial direction of the cutting axis, and the second blade includes a second blade wing; The first blade includes a root portion and a first blade wing. The root portion is connected to the blade shaft, and a plurality of the first blade wings are circumferentially spaced and connected to the periphery of the root portion.

13. The blade assembly as claimed in claim 12, characterized in that, The connection between the first blade wing and the blade root has a reference line, and the line connecting the midpoint of the reference line and the center of the blade axis is perpendicular to the reference line; At least one of the first blade wings is bent upwards, and the angle between the bending line of the first blade wing and the reference line toward the back of the first blade wing is α6, where 1°≤α6≤3°.

14. The blade assembly as claimed in claim 12, characterized in that, At least one first blade wing is horizontally arranged, at least one first blade wing is bent upward, and at least one first blade wing is bent downward. The horizontally arranged first blade wing, the upwardly bent first blade wing, and the downwardly bent first blade wing are arranged alternately along the circumference of the blade root.

15. A cooking cup, characterized in that, include: The cup body has a food processing chamber; as well as The knife assembly as described in any one of claims 1 to 14 is disposed on the cup body and extends into the food processing cavity.

16. A food processor, characterized in that, include: Base; and The cooking cup as described in claim 15 is disposed on the base.

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