Knife assembly and food processor

Abstract

The invention discloses a knife assembly and a food processor, the knife assembly comprises a knife shaft and a plurality of blades, the plurality of blades are connected with the knife shaft and are arranged at intervals along the circumferential direction of the knife shaft, one of the plurality of blades is a first blade, the shape of the first blade is different from that of at least one of the other blades, the first blade has a weight adjustment zone such that the geometric center of the knife assembly coincides with the center of gravity of the knife assembly. According to the cutter assembly, the thickness of the first blade is different from the thickness of the adjacent blade, so that the geometric center of the cutter assembly coincides with the gravity center of the cutter assembly, vibration in the operation process of the cutter assembly is reduced, the operation stability of the cutter assembly can be improved, noise in the operation process of the cutter assembly is reduced, and the service life of the cutter assembly is prolonged. Therefore, the experience feeling of the user can be improved; and the movement of the food materials between the first blade and the other blades is improved, so that the food materials are fully beaten and cut.

Description

Technical Field

[0001] The present invention relates to the field of food processing, and in particular to a knife assembly and a food processor. Background Art

[0002] Conventional meat grinder knife sets are four-blade or two-blade, and generally the two blades have the same shape and are symmetrically designed. This can achieve a balance for the knife set. However, due to the different diameters of cup bodies with different heights, the unified blade design does not have a good effect on cutting meat. Therefore, currently, technicians have designed some blades with differences, but the balance of this structure is not good, and there is a large vibration and noise during use, which requires further improvement. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the present invention is to provide a knife assembly, which reduces the vibration during the operation of the knife assembly, and further improves the running stability of the knife assembly, so as to reduce the noise during the operation of the knife assembly, thereby improving the user experience.

[0004] The present invention also provides a food processor having the above knife assembly.

[0005] The knife assembly according to the first aspect embodiment of the present invention includes: a knife shaft; a plurality of blades, the plurality of blades are connected to the knife shaft and arranged at intervals along the circumferential direction of the knife shaft, and one of the plurality of blades is a first blade, and the shape of the first blade is different from that of at least one of the remaining blades. Wherein, the first blade has a weight adjustment area to make the geometric center of the knife assembly coincide with the center of gravity of the knife assembly.

[0006] According to the knife assembly of the embodiment of the present invention, by setting the thickness of the first blade to be different from the thickness of the adjacent blade, the geometric center of the knife assembly coincides with the center of gravity of the knife assembly, reducing the vibration during the operation of the knife assembly, and further improving the running stability of the knife assembly, so as to reduce the noise during the operation of the knife assembly, thereby improving the user experience; it is also beneficial to improve the movement of the food material between the first blade and the remaining blades, so that the food material is fully beaten and cut.

[0007] According to some embodiments of the present invention, at least part of the first blade is the adjustment area, and the thickness a of the first blade in the adjustment area and the thickness b of the adjacent blade satisfy: 0.2 mm ≤ b - a ≤ 1 mm.

[0008] According to some embodiments of the present invention, the plurality of blades are arranged staggeredly in the axial direction of the knife shaft, and the first blade is located on the side of the remaining blades facing the bottom wall of the stirring cavity.

[0009] According to some embodiments of the present invention, the first blade includes a body portion and a bent portion. One end of the body portion is connected to the knife shaft, and the other end extends radially outward along the knife shaft. One end of the bent portion is connected to the other end of the body portion, and the other end of the bent portion extends radially outward along the knife shaft and axially along the knife shaft towards the remaining blades.

[0010] According to some embodiments of the present invention, a plane passing through the free end of the bent portion and perpendicular to the axis of the knife shaft is a first plane. In the first plane, the minimum distance from the free end of the bent portion to the side wall of the stirring chamber is d1, and the inner diameter of the stirring chamber is r1, satisfying: 0.03 ≤ d1 / r1 ≤ 0.28.

[0011] According to some embodiments of the present invention, a plane passing through the bent position and perpendicular to the axis of the knife shaft is a second plane. In the second plane, the minimum distance from the bent position to the side wall of the stirring chamber is d2, and the inner diameter of the stirring chamber is r2, and satisfying: 0.03 ≤ d2 / r2 ≤ 0.5.

[0012] According to some embodiments of the present invention, in the projection plane perpendicular to the knife shaft, the projection of the body portion is a straight line.

[0013] According to some embodiments of the present invention, the minimum distance from the first plane to the bottom wall of the stirring chamber is h, and the minimum distance from the bottom wall of the stirring chamber to the top wall of the stirring chamber is H, satisfying 0.03 ≤ h / H ≤ 0.4.

[0014] According to some embodiments of the present invention, one of the plurality of blades is a second blade, and the second blade is arranged on the other side of the knife shaft in the radial direction opposite to the first blade, and the second blade is an arc-shaped blade.

[0015] According to some embodiments of the present invention, in the projection plane perpendicular to the knife shaft, the projection of the second blade is a curve extending around the axis of the knife shaft.

[0016] According to some embodiments of the present invention, the plurality of blades are injection-molded on the knife shaft.

[0017] A food processor according to an embodiment of the second aspect of the present invention includes: a cup assembly and a knife assembly according to the above-mentioned first aspect embodiment of the present invention. The cup assembly has a stirring chamber, and the knife assembly is disposed in the stirring chamber.

[0018] According to the food processor of the embodiment of the present invention, by setting the above-mentioned knife assembly, the geometric center of the knife assembly coincides with the center of gravity of the knife assembly, reducing the vibration during the operation of the knife assembly, thereby improving the running stability of the knife assembly, reducing the noise during the operation of the knife assembly, and thus improving the overall performance of the food processor and the user experience.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 is a cross-sectional view of a food processor according to an embodiment of the present invention;

[0022] Figure 2 is a cross-sectional view of a food processor according to an embodiment of the present invention, in which the cup lid is not placed;

[0023] Figure 3 is Figure 2 a cross-sectional view taken along line A-A in;

[0024] Figure 4 is Figure 2 a cross-sectional view taken along line B-B in;

[0025] Figure 5 is Figure 2 a schematic diagram of the knife assembly in;

[0026] Figure 6 is Figure 5 a cross-sectional view taken along line C-C in;

[0027] Figure 7 is Figure 5 a top view of the knife assembly in;

[0028] Figure 8 is a schematic diagram of a food processor according to an embodiment of the present invention, in which the geometric center and the center of gravity of the knife assembly are schematically shown.

[0029] Reference Signs:

[0030] 100, food processor;

[0031] 10, knife assembly; 1, knife shaft; 2, blade; 21, first blade; 211, body part; 212, bending part; 213, free end; 214, bending position; 22, second blade; 23, arc blade;

[0032] 31. First plane; 32. Second plane;

[0033] 40. Cup assembly; 41. Stirring chamber; 411. Side wall; 412. Bottom wall; 42. Cup body; 43. Cup lid. Detailed implementation mode

[0034] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0035] Refer to the following Figures 1-8 to describe the knife assembly 10 according to an embodiment of the present invention.

[0036] Refer to Figures 1-5 , the knife assembly 10 includes a knife shaft 1 and a plurality of blades 2. The plurality of blades 2 are connected to the knife shaft 1 and are arranged at intervals along the circumferential direction of the knife shaft 1. Specifically, the blades 2 are fixedly connected to the knife shaft 1, and the knife shaft 1 drives the blades 2 to rotate so that the blades 2 perform cutting and stirring on food. There are a plurality of blades 2. For example, there can be two, three, four or more. The plurality of blades 2 can improve the processing effect of the knife assembly 10 on food. One of the plurality of blades 2 is the first blade 21, and the shape of the first blade 21 is different from that of at least one of the remaining blades 2. It can be that the shape of the first blade 21 is different from that of one of the remaining blades 2, or the shape of the first blade 21 is different from that of a plurality of the remaining blades 2. Among them, the shape of the first blade 21 can be designed according to the actual use situation so that it can be adapted to different food processors 100, or designed according to different cutting effects, which can increase the adaptability of the knife assembly 10 and the diversity of food processing.

[0037] In a gravitational field, the point through which the resultant force of the gravity of all the component fulcrums passes when an object is in any orientation is called the center of gravity; the center of gravity of a regular and uniformly dense object is its geometric center. The shape of the first blade 21 is different from that of at least one of the remaining blades 2, that is, the knife assembly 10 is an irregular object. Furthermore, the center of gravity of the knife assembly 10 may deviate from the geometric center of the knife assembly 10, which may lead to problems such as poor balance of the knife assembly 10, unstable operation and poor noise. Among them, the first blade 21 has a weight adjustment area, so that the center of gravity of the first blade 21 and the adjacent blades 2 can be adjusted, so that the geometric center of the knife assembly 10 coincides with the center of gravity of the knife assembly 10, ensuring the dynamic balance of the knife assembly 10. When using the knife assembly 10 to cut food, it is beneficial to improve the movement of food between the first blade 21 and the remaining blades 2, so that the food can be fully beaten and cut.

[0038] If the weight of the first blade 21 is too heavy, it is likely to cause a relatively high centrifugal force. When the knife assembly 10 operates, the food is prone to shift towards the first blade 21, which is not conducive to the other blades 2 cutting the food. The geometric center of the knife assembly 10 coincides with the center of gravity of the knife assembly 10, which can ensure the dynamic balance of the knife assembly 10, ensure the uniformity of the dispersion of the food between the first blade 21 and the other blades 2, and enable the food ingredients to be fully beaten and cut.

[0039] In a specific example, the thickness of the first blade 21 is different from the thickness of the adjacent blade 2, so that the center of gravity of the first blade 21 and the adjacent blade 2 can be adjusted, so that the geometric center of the knife assembly 10 coincides with the center of gravity of the knife assembly 10, ensure the dynamic balance of the knife assembly 10, reduce the vibration during the operation of the knife assembly 10, and further improve the running stability of the knife assembly 10, reduce the noise during the operation of the knife assembly 10, thereby improving the user experience; it is also beneficial to improve the movement of the food ingredients between the first blade 21 and the other blades 2, so that the food ingredients can be fully cut. At the same time, the process of adjusting the thickness is relatively simple, which can reduce the production complexity of the blade 2 and improve the production efficiency of the blade 2.

[0040] In another specific example, through holes can be provided on the first blade 21 to reduce the weight of the first blade 21, so that the weight of the first blade 21 is equal to the weight of the adjacent blade 2, so that the center of gravity of the first blade 21 and the adjacent blade 2 can be adjusted, so that the geometric center of the knife assembly 10 coincides with the center of gravity of the knife assembly 10, ensure the dynamic balance of the knife assembly 10, reduce the vibration during the operation of the knife assembly 10, and further improve the running stability of the knife assembly 10, reduce the noise during the operation of the knife assembly 10; it is also beneficial to improve the movement of the food ingredients between the first blade 21 and the other blades 2, so that the food ingredients are fully cut, thereby improving the user experience.

[0041] In yet another specific example, in the third plane perpendicular to the axis of the knife shaft 1, the distance between the geometric center of the knife assembly 10 and the center of gravity of the knife assembly 10 is less than or equal to 1.3 mm. The distance between the geometric center of the knife assembly 10 and the center of gravity of the knife assembly 10 can be 0.1 mm, 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1.0 mm or 1.3 mm. Through three-dimensional simulation calculation, when the distance range between the center of gravity and the geometric center of the knife assembly 10 is controlled within [0, 1.3 mm], the dynamic balance of the knife assembly 10 can be improved, the vibration during the operation of the knife assembly 10 can be reduced, and further the running stability of the knife assembly 10 can be improved, and the noise during the operation of the knife assembly 10 can be reduced, thereby improving the user experience.

[0042] According to some embodiments of the present invention, such as Figure 8As shown, the distance between the geometric center and the center of gravity in the first direction within the first plane is less than or equal to 0.9 mm, and the distance between the geometric center and the center of gravity in the second direction within the first plane is less than or equal to 0.9 mm. The first direction is perpendicular to the second direction. Among them, let the first direction be the X-axis direction, the second direction be the Y-axis direction, the geometric center be the origin O, and the center of gravity be point M. The vertical distance h2 between the geometric center and the center of gravity in the X-axis direction within the first plane, then the value range of h2 is [0, 0.9 mm]. The vertical distance h1 between the geometric center and the center of gravity in the Y-axis direction within the first plane, the value range of h1 is [0, 0.9 mm]. That is to say, h1 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.5 mm, 0.7 mm or 0.9 mm, and h2 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.5 mm, 0.7 mm or 0.9 mm. Through three-dimensional simulation calculation, when h1 ∈ [0, 0.9 mm] and h2 ∈ [0, 0.9 mm], the dynamic balance of the cutter assembly 10 is in a better state, which can reduce the noise during the operation of the cutter assembly 10 and improve the running stability of the cutter assembly 10.

[0043] For the cutter assembly 10 according to the embodiment of the present invention, by setting an adjustment area for the weight on the first blade 21, the geometric center of the cutter assembly 10 coincides with the center of gravity of the cutter assembly 10, reducing the vibration during the operation of the cutter assembly 10, and thus improving the running stability of the cutter assembly 10 to reduce the noise during the operation of the cutter assembly 10; it is also beneficial to improve the movement of the food material between the first blade 21 and the other blades 2, so that the food material is fully beaten and cut, thereby improving the user experience.

[0044] According to some embodiments of the present invention, referring to Figures 1-2 、 Figure 5 , the thickness a of the first blade 21 and the thickness b of the adjacent blade 2 satisfy: 0.2 mm ≤ b - a ≤ 1 mm. Within this range, the geometric center of the cutter assembly 10 coincides with the center of gravity of the cutter assembly 10, and the dynamic balance of the cutter assembly 10 is in a better state, which can reduce the noise during the operation of the cutter assembly 10 and improve the running stability of the cutter assembly 10. For example, the difference between the thickness a of the first blade 21 and the thickness b of the adjacent blade 2 can be 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1 mm.

[0045] If the thickness a of the first blade 21 and the thickness b of the adjacent blade 2 satisfy: b - a > 1 mm, the thickness of the first blade 21 and the thickness of the adjacent blade 2 differ greatly, then it is difficult for the other blades 2 to cut the food material, reducing the cutting efficiency of the food material.

[0046] According to some embodiments of the present invention, such as Figures 5-6As shown, the thickness of the first blade 21 is 0.99 mm - 2.99 mm. Among them, let the thickness of the first blade 21 be a, and the setting range of a is [0.99 mm, 2.99 mm]. For example, the value of a can be 0.99 mm, 0.1 mm, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm or 2.99 mm. Setting the thickness of the first blade 21 at 0.99 mm - 2.99 mm can prevent the first blade 21 from being too thin and deforming, thereby ensuring the normal use of the food processor 100. At the same time, it can also prevent the first blade 21 from being too thick, resulting in poor running stability of the machine, and it is easy to adhere the ingredients to the cup wall during the whipping process, and the efficiency of other blades in whipping the ingredients is low.

[0047] According to some embodiments of the present invention, as Figures 5-6 shown, the preset thickness of the cutting edge of the first blade 21 is 0.1 mm - 1.5 mm. Specifically, the thickness of the cutting edge of the first blade 21 is 0.1 mm - 1.5 mm. Let the thickness of the cutting edge of the first blade 21 be t, and the value range of t is [0.1 mm, 1.5 mm]. For example, the thickness of the cutting edge of the first blade 21 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.5 mm, 1 mm, 1.2 mm or 1.5 mm. Among them, the smaller the thickness of the cutting edge, the sharper the cutting edge and the better the cutting effect. Therefore, setting 0.1 mm ≤ a ≤ 1.5 mm can reduce the cutting effect of the first blade 21, so that the food processor 100 can avoid cutting the food too finely on the premise of ensuring the food processing efficiency. Furthermore, the first blade 21 can mainly play the roles of impact, pulling and slapping, so that foods such as meatballs that do not need to be processed too finely can be made.

[0048] According to some embodiments of the present invention, referring to Figures 1-2 、 Figures 5-6 , multiple blades 2 are arranged staggeredly in the axial direction of the knife shaft 1, and the first blade 21 is located on one side of the other blades 2 facing the bottom wall 412 of the stirring cavity 41. Among them, the multiple blades 2 are arranged staggeredly in the axial direction of the knife shaft 1, which can make the multiple blades 2 not interfere with each other. At the same time, it can also make the blades 2 process the food at different positions, thereby improving the effect and efficiency of the food. In addition, the first blade 21 is located on one side of the other blades 2 facing the bottom wall 412 of the stirring cavity 41, that is, the blade 2 arranged at the bottom is the first blade 21. Setting the first blade 21 at the bottom can make the food at the bottom roll upward, avoid the food from depositing at the bottom, and thereby increase the cutting probability of the ingredients and other blades 2, improving the stirring and pulverizing effect of the food processor 100.

[0049] According to some embodiments of the present invention, referring to Figures 1-6, the first blade 21 includes a body portion 211 and a bent portion 212. One end of the body portion 211 is connected to the cutter shaft 1 and the other end extends radially outward along the cutter shaft 1. One end of the bent portion 212 is connected to the other end of the body portion 211, and the other end of the bent portion 212 extends radially outward along the cutter shaft 1 and axially along the cutter shaft 1 towards the other blades 2.

[0050] Specifically, one end of the body portion 211 is connected to the cutter shaft 1, and the other end extends horizontally outward in the radial direction of the cutter shaft 1. The bent portion 212 is connected to the end of the body portion 211 far from the cutter shaft 1 and extends obliquely upward and outward along the axis of the cutter shaft 1, so that an angle is formed between the bent portion 212 and the body portion 211, and the angle is an obtuse angle. Among them, during the rotation of the first blade 21 to cut and stir food, the bent portion 212 can bring an oblique thrust in the circumferential direction to the food on the inner wall surface of the stirring cavity 41 of the food processor 100, so that the food at the bottom and side can be driven to roll upward, avoiding the deposition of food at the bottom and side. At the same time, it can also increase the cutting probability of the flipped ingredients and the stirring knife, and thus improve the stirring and crushing effect.

[0051] According to some embodiments of the present invention, referring to Figures 2-3 , a plane passing through the free end 213 of the bent portion 212 and perpendicular to the axis of the cutter shaft 1 is the first plane 31. In the first plane 31, the minimum distance from the free end 213 of the bent portion 212 to the side wall 411 of the stirring cavity 41 is d1, and the inner diameter of the stirring cavity 41 is r1, satisfying: 0.03 ≤ d1 / r1 ≤ 0.28. It should be noted that the free end 213 of the bent portion 212 refers to the end of the bent portion 212 far from the body portion 211. It can be understood that since the end of the bent portion 212 also has a certain thickness, in order to facilitate the description of the beating and stirring of the ingredients at the edge of the bent portion 212, the "minimum distance from the free end 213 of the bent portion 212 to the side wall 411 of the stirring cavity 41" is used to refer to the distance between the beating position at the edge of the bent portion 212 and the side wall 411 of the stirring cavity 41.

[0052] When the relationship between the distance d1 from the slapping position at the edge of the bent portion 212 to the side wall 411 of the stirring cavity 41 and the inner diameter r1 of the stirring cavity 41 satisfies the above relationship, on the one hand, an appropriate spacing is reserved between the bent portion 212 and the side wall 411, which can avoid interference between the bent portion 212 and the side wall 411 of the stirring cavity 41; on the other hand, an appropriate spacing is reserved between the bent portion 212 and the side wall 411, which helps the bent portion 212 to push the food downward and lift and roll upward under the drive of the bent portion 212, helps the bent portion 212 to press out the large pieces of food at the side wall 411, and can drive the food to roll upward. It can not only slap and stir the food well, but also avoid the food sticking to the side wall 411 of the stirring cavity 41, so as to realize the full slapping and stirring of the food.

[0053] If the distance between the bent portion 212 and the side wall 411 of the stirring cavity 41 is too large, the first blade 21 cannot provide an inward rolling force to the food on the side wall 411, and the food will deposit on the side wall 411, affecting the food processing effect.

[0054] If the distance between the bent portion 212 and the side wall 411 of the stirring cavity 41 is too small, the first blade 21 may touch the side wall 411, which is not conducive to the operation of the knife assembly 10.

[0055] Optionally, d1 / r1 can be 0.03, 0.04, 0.05, 0.06, 0.1, 0.2, 0.25, 0.26, 0.28, and there is no limit here.

[0056] d1 satisfies: 1mm ≤ d1 ≤ 10mm. For example, the value of d1 can be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 8mm or 10mm. Among them, the gap between the bent portion 212 and the peripheral wall of the cup body 42 can be used to limit the acting force of the bent portion 212 on the food, and the acting force of the bent portion 212 can be controlled by controlling the size of the gap. Furthermore, it can be avoided that the food cannot be provided with an upward rolling force due to the too large or too small distance between the bent portion 212 and the cup body 42, so as to further avoid food deposition and improve the food processing effect.

[0057] According to some embodiments of the present invention, referring to Figures 3-4, the connection part between the bending part 212 and the body part 211 is the bending position 214. The plane passing through the bending position 214 and perpendicular to the axis of the cutter shaft 1 is the second plane 32. In the second plane 32, the minimum distance from the bending position 214 to the side wall 411 of the stirring cavity 41 is d2, and the inner diameter of the stirring cavity 41 is r2, and it satisfies: 0.03 ≤ d2 / r2 ≤ 0.5. Wherein, the bending part 212 can stir the food materials near the side wall 411 of the stirring cavity 41, preventing the food materials from sticking to the side wall 411 of the stirring cavity 41, and even making the food materials near the side wall 411 of the stirring cavity 41 stir towards the direction of the cutter shaft 1 to a certain extent. Therefore, the "minimum distance from the bending position 214 of the bending part 212 to the side wall 411 of the stirring cavity 41" here represents the effective stirring position of the end of the bending part 212 near the body part 211. For the bending position 214, there is a bending angle between the body part 211 and the bending part 212, and the tip of the bending angle is the bending position 214. In order to avoid stress concentration at the tip of the bending angle, usually, the tip of the bending angle is processed with an arc transition to make the connection between the body part 211 and the bending part 212 more reliable.

[0058] When the present application satisfies the above relational expression, an appropriate distance is reserved between the bending position 214 and the side wall 411, which helps the bending part to push the food materials downward and make them roll upward under the drive of the bending part 212. The bending part 212 can better stir the food materials near the side wall 411 of the stirring cavity 41, and even make the food materials near the side wall 411 of the stirring cavity 41 stir towards the direction of the cutter shaft 1, so that the side wall 411 of the stirring cavity 41 is not easily stuck to the side wall 411 of the stirring cavity 41, and the food materials in the stirring cavity 41 are always in a cyclic stirring process from the center of the cutter shaft 1 towards the side wall 411 of the stirring cavity 41 and then from the side wall 411 of the stirring cavity 41 towards the cutter shaft 1, so that the blade 2 can better beat and stir the food materials.

[0059] Optionally, d2 / r2 can be 0.03, 0.04, 0.05, 0.06, 0.1, 0.2, 0.3, 0.4, 0.5, and there is no limitation here.

[0060] According to some embodiments of the present invention, referring to FIG. 6, in the projection plane perpendicular to the cutter shaft 1, the projection of the body part 211 is a straight line. That is to say, the body part 211 is formed into a straight plate-shaped blade 2. The structure of the straight plate is simple and convenient to manufacture, and thus the convenience of processing and forming the first blade 21 can be improved.

[0061] According to some embodiments of the present invention, referring to Figures 1-5, the minimum distance from the first plane 31 to the bottom wall 412 of the stirring cavity 41 is h, and the minimum distance from the bottom wall 412 of the stirring cavity 41 to the top wall of the stirring cavity 41 is H, satisfying 0.03 ≤ h / H ≤ 0.4. Meeting the above relational expression can enable the first blade 21 to better stir the food near the bottom wall 412 of the stirring cavity 41. It can be understood that during the rotation of the first blade 21, the main body portion 211 can better cut and stir the food near the bottom of the stirring cavity 41, so that the food is not easily adhered to the bottom wall 412 of the stirring cavity 41. Further, as the first blade 21 continues to rotate, under the action of centrifugal force, the food will be transported towards the outer periphery of the main body portion 211. When the food is transported to the outer periphery of the main body portion 211, the bent portion can further cut and stir the food near the edge of the main body portion 211, and the inclined upward bent portion 212 can also better transport the food continuously transported towards the radial outer side under the action of centrifugal force towards the direction of the knife shaft 1, so that the food can be fully cut and stirred in the stirring cavity 41, and the food is not easily adhered to the bottom wall 412 and the side wall 411 of the stirring cavity 41.

[0062] Optionally, h / H can be 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.2, 0.3, and there is no limitation here.

[0063] According to some embodiments of the present invention, referring to Figures 1-5 , one of the multiple blades 2 is the second blade 22, and the second blade 22 is arranged on the other side of the knife shaft 1 in the radial direction opposite to the first blade 21, and the second blade 22 is an arc-shaped blade 23. Further, the second blade 22 being an arc-shaped blade 23 can improve the stirring effect of the knife assembly 10. Both the first blade 21 and the second blade 22 are installed on the knife shaft 1. Among them, the connection positions of the first blade 21 and the second blade 22 with the knife shaft 1 are the main stress points of the knife shaft 1. The shape of the second blade 22 is different from that of the first blade 21, which can make the centers of gravity of the first blade 21 and the second blade 22 tend to be symmetric, and further improve the dynamic balance of the knife assembly 10, and further reduce the vibration of the knife assembly 10 during operation, thereby reducing the noise of the food processor 100 and improving the user experience.

[0064] According to some embodiments of the present invention, referring to Figure 7 , in the projection plane perpendicular to the knife shaft 1, the projection of the second blade 22 is a curve extending around the axis of the knife shaft 1, and the second blade 22 can provide an inward rolling force for the food in the stirring cavity 41 to better process and stir the food.

[0065] According to some embodiments of the present invention, referring to Figures 1-2, Multiple blades 2 are injection-molded on the cutter shaft 1, which can not only reduce the assembly steps of the food processor 100, but also ensure the structural strength of the cutter assembly 10, thereby improving the assembly efficiency of the food processor 100.

[0066] According to some embodiments of the present invention, the first blade 21 has no cutting edge, or the thickness of the cutting edge of the first blade 21 is a preset thickness, so that the cutting edge of the first blade 21 is a blunt edge. Among them, in some embodiments, the first blade 21 has no cutting edge, and the cutting ability of the non-cutting edge is poor, mainly playing a role in stirring and patting. In this way, when processing food, the cutting effect on the food can be reduced, and thus it can effectively prevent the food from being processed too finely, so that foods such as meatballs that do not need to be processed too finely can be made; at the same time, since the first blade 21 has no cutting edge, that is, no edge-opening treatment is required for the first blade 21, which can reduce the production difficulty of the first blade 21, and thus improve the production convenience of the first blade 21.

[0067] In some other embodiments, the thickness of the cutting edge of the first blade 21 is a preset thickness, so that the cutting edge of the first blade 21 is a blunt edge. Among them, the preset thickness can be designed according to actual needs, and the preset thickness is greater than the thickness of the cutting edge of a sharp blade, so that the cutting edge of the first blade 21 is a blunt edge. The blunt edge has a certain cutting property and can be used to cut food, but its cutting effect is relatively poor compared with that of a sharp blade. Therefore, when processing food, the blunt edge can ensure that the food processing efficiency is not too low, and can also prevent the food from being processed too finely and unable to make some foods that require adhesiveness, such as meatballs.

[0068] In some specific embodiments of the present invention, as Figures 5-6 shown, the width of the cutting edge of the first blade 21 is 0.5 mm - 8 mm. Among them, let the width of the cutting edge of the first blade 21 be d, and the value range of d is [0.5 mm, 8 mm]. For example, the width of the cutting edge of the first blade 21 can be 0.5 mm, 0.6 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm or 8 mm. Setting the width of the cutting edge of the first blade 21 between 0.5 mm and 8 mm can enable the first blade 21 to improve the strength of the first blade 21 while ensuring the effective cutting of the ingredients by the cutting edge.

[0069] According to some embodiments of the present invention, as Figure 1As shown, one of the multiple blades 2 is the second blade 22, and the second blade 22 is arranged on the other side of the cutter shaft 1 radially opposite to the first blade 21. Among them, in the third plane, the connection line between the center point of the end of the first blade 21 connected to the cutter shaft 1 in the circumferential direction of the cutter shaft 1 and the center point of the cutter shaft 1 is the first line, and the connection line between the center point of the end of the second blade 22 connected to the cutter shaft 1 in the circumferential direction of the cutter shaft 1 and the center point of the cutter shaft 1 is the second line, and the included angle between the first line and the second line is 120° - 178°.

[0070] For example, the included angle between the first line and the second line is α, and α can be 120°, 135°, 150° or 165°. Specifically, the second blade 22 is arranged on the other side of the cutter shaft 1 radially opposite to the first blade 21. It can be that the first blade 21 and the second blade 22 are arranged in the same plane perpendicular to the axis of the cutter shaft 1 and are arranged on the other side of the cutter shaft 1 radially opposite to the first blade 21, or it can be that the first blade 21 and the second blade 22 are not in the same plane, and the first blade 21 and the second blade 22 can be arranged at intervals along the axial direction of the cutter shaft 1 and are correspondingly arranged on the opposite sides of the second blade 22.

[0071] The shape of the second blade 22 is different from that of the first blade 21, and both the first blade 21 and the second blade 22 are installed on the cutter shaft 1. Among them, the positions where the first blade 21 and the second blade 22 are connected to the cutter shaft 1 are the main stress points of the cutter shaft 1. Furthermore, the included angle between the first line and the second line can be used to indicate the included angle between the first blade 21 and the second blade 22 in the circumferential direction of the cutter shaft 1. When the included angle α between the first line and the second line is 120° - 178°, the centers of gravity of the first blade 21 and the second blade 22 can tend to a symmetrical relationship, thereby improving the dynamic balance of the cutter assembly 10, further reducing the vibration of the cutter assembly 10 during operation, and thus reducing the noise of the food processor 100 and improving the user experience.

[0072] The first blade 21 is located on the side of the second blade 22 facing the bottom wall of the stirring cavity 41. In the axial direction of the cutter shaft 1, the minimum distance from the third plane to the second blade 22 is C, and the distance from the free end of the bending portion 212 to the bending position of the first blade 21 is c, satisfying: 0.5 ≤ c / C ≤ 0.99. Meeting the above relational expression, when the bending portion 212 transports the food material towards the cutter shaft 1, the second blade 22 can better pat, stir and transport this part of the food material, so that the food material can be fully patted and stirred.

[0073] Optionally, c / C can be 0.5, 0.6, 0.7, 0.8, 0.9, 0.99, and there is no limit here.

[0074] According to some embodiments of the present invention, the thicknesses of the cutting edges of at least two blades 2 are different. Among them, the thickness of the cutting edge can be adjusted according to the actual situation. For example, when the food needs to be processed more delicately, all the remaining cutting edges except the first blade 21 can be made into sharp blades to increase the cutting effect; when the food does not need to be processed so delicately, some can be made into sharp blades and some into blunt blades, so that while ensuring the processing efficiency, the food processor 100 can meet the customer's needs.

[0075] The food processor 100 according to the second aspect embodiment of the present invention includes a cup assembly 40 and a knife assembly 10 according to the first aspect embodiment of the present invention above. The cup assembly 40 has a stirring cavity 41, and the knife assembly 10 is arranged in the stirring cavity 41.

[0076] Specifically, the cup assembly 40 has a stirring cavity 41 for accommodating the food to be processed, such as meat, vegetables, etc. The knife assembly 10 is arranged in the stirring cavity 41 for stirring and cutting the food to be processed in the stirring cavity 41 to make it crushed and stirred evenly.

[0077] The food processor 100 according to the embodiment of the present invention, by setting the above-mentioned knife assembly 10, makes the geometric center of the knife assembly 10 coincide with the center of gravity of the knife assembly 10, reduces the vibration during the operation of the knife assembly 10, and further can improve the running stability of the knife assembly 10, so as to reduce the noise during the operation of the knife assembly 10, thereby improving the overall performance of the food processor 100 and enhancing the user experience.

[0078] In some specific embodiments of the present invention, as Figure 1 shown, the cup assembly 40 may further include a cup body 42 and a cup cover 43. The cup body 42 defines a stirring cavity 41 that is open on one side, and the cup cover 43 is arranged on the open side of the cup body 42 to open or cover the stirring cavity 41. Among them, the cup cover 43 is arranged on the open side of the cup body 42. When the food needs to be put into the stirring cavity 41 or taken out from the stirring cavity 41, the cup cover 43 can be moved away from the open side of the cup body 42 to open the stirring cavity 41; when the food needs to be cut and stirred, the cup cover 43 is covered on the open side of the cup body 42 to make the stirring cavity 41 in a sealed state, which can prevent splashing when the food processor 100 processes the food, and further improve the use safety of the food processor 100. Optionally, in some specific embodiments, the cup cover 43 and the cup body 42 are detachably connected; in other embodiments, the cup cover 43 and the cup body 42 are movably connected, and the cup cover 43 can move relative to the cup body 42 to open and seal the open side of the cup body 42.

[0079] When food needs to be processed, first move the cup lid 43 away from the open side of the cup body 42 to open the stirring cavity 41. Then place the food to be processed in the stirring cavity 41. At the same time, note that the food should not exceed the highest indication line of the capacity indication area. Then cover the stirring cavity 41 with the cup lid 43 to make the stirring cavity 41 in a sealed state. Then turn on the driving device of the food processor 100 to drive the driving device to drive the cutter shaft 1 to move, and then drive a plurality of blades 2 to rotate, so as to stir and crush the food and process the food to the required state. Turn off the power of the food processor 100, then open the stirring cavity 41 again, and transfer the food from the stirring cavity 41 to an external container to complete the food processing work.

[0080] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0081] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0082] In the description of this specification, the description with reference to terms such as "some embodiments", "optionally", "further" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0083] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A knife assembly, characterized in that, Comprising: Tool shaft; A plurality of blades, the plurality of blades being connected to the tool shaft and arranged at intervals in the circumferential direction of the tool shaft, one of the plurality of blades being a first blade, the shape of the first blade being different from the shape of at least one of the remaining blades. Wherein, the first blade has a weight adjustment area to make the geometric center of the tool assembly coincide with the center of gravity of the tool assembly.

2. The knife assembly according to claim 1, characterized in that At least a part of the first blade is the adjustment area, and the thickness a of the first blade in the adjustment area and the thickness b of the adjacent blade satisfy: 0.2 mm ≤ b - a ≤ 1 mm.

3. The knife assembly according to claim 1, wherein, The plurality of blades are arranged staggeredly in the axial direction of the tool shaft, and the first blade is located on the side of the remaining blades facing the bottom wall of the stirring chamber.

4. The knife assembly according to claim 1, characterized in that, The first blade includes a body portion and a bent portion, one end of the body portion is connected to the tool shaft and the other end extends radially outward along the tool shaft, one end of the bent portion is connected to the other end of the body portion, and the other end of the bent portion extends radially outward along the tool shaft and axially toward the remaining blades.

5. The knife assembly according to claim 4, characterized in that, The plane passing through the free end of the bent portion and perpendicular to the axis of the tool shaft is the first plane. In the first plane, the minimum distance from the free end of the bent portion to the side wall of the stirring chamber is d1, and the inner diameter of the stirring chamber is r1, satisfying: 0.03 ≤ d1 / r1 ≤ 0.

28.

6. The knife assembly according to claim 4, wherein The connection position between the bent portion and the body portion is the bending position. The plane passing through the bending position and perpendicular to the axis of the tool shaft is the second plane. In the second plane, the minimum distance from the bending position to the side wall of the stirring chamber is d2, and the inner diameter of the stirring chamber is r2, and it satisfies: 0.03 ≤ d2 / r2 ≤ 0.

5.

7. The knife assembly according to claim 4, wherein, In the projection plane perpendicular to the tool shaft, the projection of the body portion is a straight line.

8. The knife assembly according to claim 5, characterized in that, The minimum distance from the first plane to the bottom wall of the stirring chamber is h, and the minimum distance from the bottom wall of the stirring chamber to the top wall of the stirring chamber is H, satisfying: 0.03 ≤ h / H ≤ 0.

4.

9. The knife assembly according to claim 1, characterized in that One of the plurality of blades is a second blade, the second blade is arranged on the other side of the tool shaft in the radial direction opposite to the first blade, and the second blade is an arc-shaped blade.

10. The knife assembly according to claim 9, characterized in that, In the projection plane perpendicular to the tool shaft, the projection of the second blade is a curve extending around the axis of the tool shaft.

11. The knife assembly according to claim 1, characterized in that, The plurality of blades are injection-molded on the tool shaft.

12. A food processor, characterized in that, Comprising: a cup assembly and the tool assembly according to any one of claims 1-11, the cup assembly having a stirring chamber, and the tool assembly is arranged in the stirring chamber.

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