Stirring knife assembly and food processor

Abstract

The invention provides a stirring knife assembly and a food processor. The stirring knife assembly comprises a rotating shaft, the rotating shaft comprises a driving section, the driving section comprises a plurality of convex edges extending in the vertical direction, the convex edges gradually deflect in the circumferential direction of the driving section, the deflection angle of the convex edges on the unit length of the driving section is H, and the numerical value range of H is 0.5-5; the cutter assembly is detachably installed on the rotating shaft, the cutter assembly comprises a cutter rest and a blade fixed to the cutter rest, the blade and / or the cutter rest are / is provided with a driving hole matched with the driving section, the driving hole comprises a plurality of convex corners vertically extending in the vertical direction, and the convex corners are matched with the convex edges in an abutting mode respectively. In this way, the cutter assembly can be conveniently detached to be cleaned.

Description

Technical Field

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

[0002] As people's living standards continue to improve, many different types of food processors have appeared on the market. The functions of food processors can mainly include, but are not limited to, making soy milk, squeezing juice, making rice paste, mincing meat, shaved ice, making coffee and / or preparing facial masks. Food processors can include soy milk machines, blenders, wall-breaking food processors, dough mixers or health-preserving blenders, etc., which are machines for crushing and blending food. The blending blade of the existing food processor is fixed at the bottom of the blending cup and cannot be disassembled, making it inconvenient to clean. Summary of the invention

[0003] The present application provides a stirring knife assembly and a food processor, wherein the knife assembly can be conveniently disassembled for cleaning.

[0004] On one hand, the present application provides a stirring blade assembly. The stirring blade assembly comprises: a rotating shaft, comprising a driving section, the driving section comprising a plurality of convex edges extending in the up-down direction, the plurality of convex edges gradually deflecting along the circumference of the driving section, and the deflection angle of the convex edges per unit length of the driving section is H, and the numerical range of H is between 0.5 and 5; and a blade assembly, detachably mounted on the rotating shaft, the blade assembly comprising a blade holder and a blade fixed to the blade holder, the blade and / or the blade holder being provided with a driving hole matching the driving section, the driving hole comprising a plurality of convex corners extending vertically in the up-down direction, the plurality of convex corners respectively abutting and matching with the plurality of convex edges. Since the knife assembly is detachably mounted on the rotating shaft, when the food processor needs to be cleaned after use, the user rotates the knife assembly along the deflection direction of the convex edge, removes the knife assembly, and cleans it thoroughly. In this way, the food processor no longer has dead corners that cannot be cleaned, effectively avoiding the breeding of bacteria and the generation of odors. At the same time, since the driving section includes a convex edge deflected along the circumferential direction, and the driving hole includes a plurality of convex corners extending vertically in the up and down directions, during the rotation of the knife assembly with the rotating shaft, the convex edge limits the convex corners, thereby preventing the knife assembly from being separated from the rotating shaft, and the installation and disassembly are convenient. In addition, since the numerical range of H is between 0.5 and 5, the deflection angle of the convex edge can better limit the knife assembly, making it difficult for the knife assembly to be separated from the rotating shaft during high-speed rotation, thereby reducing the risk of the knife assembly flying out and injuring people. Moreover, the knife assembly can be conveniently screwed into the rotating shaft, and the assembly is easy.

[0005] Furthermore, the radius of the circumscribed circle of the cross section of the driving section is the same as the radius of the circumscribed circle of the cross section of the driving hole. In this way, when pouring pulp, the knife assembly can be better prevented from being separated from the rotating shaft.

[0006] Further, the numerical range of the deflection angle H of the convex edge per unit length of the driving section is between 1 and 3 。 In this way, the deflection angle of the convex edge can better effectively limit the tool assembly, preventing the tool assembly from detaching from the rotating shaft during high-speed rotation, thus avoiding the risk of the tool assembly flying out and injuring people; and the tool assembly can be more conveniently screwed into the rotating shaft, making the assembly easier.

[0007] Further, the deflection direction of the plurality of convex edges from top to bottom is opposite to the rotation direction of the tool assembly. In this way, while the tool assembly rotates with the tool shaft, the convex angle presses against the convex edge in the direction opposite to the rotation direction of the tool shaft (i.e., the deflection direction of the convex edge from top to bottom). It can be seen that the convex edge abuts against at least part of the convex angle, and the pressing force generated by the convex edge on the convex angle has a downward component force. That is to say, the convex edge deflected circumferentially has a downward limiting effect on the tool assembly, preventing the tool assembly from axially detaching from the rotating shaft upward during high-speed rotation.

[0008] Further, the thickness of the driving hole is T, the driving section includes a first cross-section flush with the top surface of the driving hole and a second cross-section flush with the bottom surface of the driving hole. The circumradius of the first cross-section and the circumradius of the second cross-section are both c. The apothem of the first cross-section is b1, and the apothem of the second cross-section is b2. The first cross-section includes a first vertex intersecting with the convex edge, and the second cross-section includes a second vertex intersecting with the convex edge. The angle between the line connecting the first vertex and the center and the horizontal center line is A, and the angle between the line connecting the second vertex and the center and the line connecting the first vertex and the center is B. The gap between the first cross-section and the inner wall of the driving hole is E, and the following relationships are satisfied among H, T, c, b1, b2, A, B, and E: b1 = sinA * c, b2 = sin(A + B) * c; B = H * T; E = b2 - b1 = (sin(A + H * T) - sinA) * c; 0.1 mm < E < 0.8 mm. Since E = (sin(A + H * T) - sinA) * c and 0.1 mm < E < 0.8 mm, by limiting parameters such as the deflection angle H per unit length of the convex edge and the thickness T of the driving hole, the gap E is made to satisfy the above range. In this way, on the one hand, it avoids the situation where the tool assembly is not easily installed on the rotating shaft due to the too small gap E, making the installation of the tool assembly more labor-saving; on the other hand, it avoids situations such as easy slag accumulation, affecting cleaning, and high noise due to the too large gap E, providing a better user experience.

[0009] Further, E satisfies the following condition: 0.15 < E < 0.5. In this way, the fit between the tool assembly and the rotating shaft is more stable, not easily prone to slag accumulation, with low noise, and the tool assembly can be more labor-savingly installed on the rotating shaft or disassembled from the rotating shaft.

[0010] Furthermore, the first cross section includes an edge located between two adjacent first vertices, the driving hole includes an inner wall surface located between two adjacent convex corners, and the gap is formed between the edge and the corresponding inner wall surface. In this way, a gap is formed between the edge and the inner wall surface, so that the knife assembly is subjected to less resistance when installed on the rotating shaft, and the installation is more labor-saving.

[0011] Furthermore, the convex angle is in a plane shape and / or an arc shape, and the second vertex and the first vertex are both in contact with the convex angle. In this way, the knife assembly can be assembled on the rotating shaft more stably, and the noise generated during operation is small.

[0012] Furthermore, the convex edge includes a first convex edge and a second convex edge spaced apart from the first convex edge, and the first convex edge and the second convex edge are both fitted with the convex corner. In this way, the knife assembly can better cooperate with the rotating shaft, and the overall strength of the knife shaft is better and the service life is longer.

[0013] Furthermore, in the deflection direction of the convex edge from top to bottom, the first convex edge is located behind the second convex edge, and the first convex edge is an arc edge, and the second convex edge is a straight edge. Since the first convex edge is an arc edge, the knife assembly is guided by the first convex edge and can automatically rotate into place under the action of its own gravity; since the second convex edge is a straight edge, when the knife assembly is rotated and disassembled, the straight edge has a greater resistance to the knife assembly, so that the knife assembly is less likely to fall off during slurry pouring.

[0014] Furthermore, the knife assembly further includes a fixed washer, the blade is disposed between the knife holder and the fixed washer, and the blade is fixed to the knife holder and the fixed washer respectively by welding, and the blade and the fixed washer jointly form the driving hole. In this way, there is no gap between the blade, the knife holder and the fixed washer, thereby preventing food residue from being hidden between the three, and the knife assembly has a simple and stable structure, and a lower manufacturing cost. In addition, since the blade and the fixed washer jointly form the driving hole, the wear resistance of the blade can be increased, and the life and stability of the knife assembly are improved.

[0015] Furthermore, the blade and the fixed washer are respectively formed by stamping, the blade includes a first shear straight surface and a first stamped arc surface, the fixed washer includes a second shear straight surface and a second stamped arc surface, and the first shear straight surface and the second shear straight surface are attached and welded together. In this way, the welding quality between the first shear straight surface and the second shear straight surface is higher, and no gap is formed between the first shear straight surface and the second shear straight surface, thereby avoiding food residues hiding between the two, and the first stamped arc surface and the second stamped arc surface are respectively located above the blade and below the fixed washer, so that the knife assembly can be smoothly installed on the rotating shaft, or smoothly removed from the rotating shaft. After the blade and the fixed washer are respectively stamped, the burrs of the first shear straight surface and the second shear straight surface are removed, and then the first shear straight surface and the second shear straight surface are tightly attached together and welded.

[0016] Furthermore, the cross-sections of the inner and outer surfaces of the tool holder are both set to be circular. In this way, the tool holder can be processed by an ordinary lathe, which has higher processing efficiency and lower cost; and because the inner surface of the tool holder is circular, the resistance between the tool holder and the rotating shaft is smaller, and the noise is also smaller.

[0017] Furthermore, the angle of deflection of the top end of the convex edge relative to the bottom end is between 15 degrees and 75 degrees, the height of the driving section is between 8 mm and 40 mm; and / or the thickness T of the driving hole is between 1 mm and 6 mm. In this way, the convex edge and the driving hole cooperate to provide a good limiting effect on the knife assembly, the knife assembly will not be separated from the rotating shaft during the rotation process or the pulping process, and the installation and removal of the knife assembly is more convenient; in addition, by limiting the thickness of the driving hole, the cooperation between the driving hole and the rotating shaft has higher strength and wear resistance, thereby increasing the life and stability of the knife assembly.

[0018] Furthermore, the rotating shaft includes a first shaft and a second shaft, the second shaft is sleeved on the first shaft, and the second shaft includes the driving section. In this way, the first shaft and the second shaft are easier to form.

[0019] Furthermore, the second shaft further comprises a limiting section arranged above the driving section, and the tool holder comprises a limiting hole matched with the limiting section. Through the cooperation between the limiting hole and the limiting section, the tool assembly can be better limited to avoid shaking of the tool assembly during rotation.

[0020] On one hand, the present application provides a food processor, which includes: a main machine; a mixing cup assembly mounted on the main machine, the mixing cup assembly including a mixing cup and a chassis fixed to the bottom of the mixing cup; the mixing blade assembly as described above, arranged at the bottom of the mixing cup, wherein the rotating shaft passes through the chassis, and a bearing sleeve and a bearing are arranged between the rotating shaft and the chassis; and a cup cover assembly, which covers the mixing cup assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The figure shows a three-dimensional exploded view of an embodiment of the food processor of the present application;

[0022] Figure 2 Shown Figure 1 A cross-sectional view of the blender cup assembly shown;

[0023] Figure 3 Shown Figure 2 A cross-sectional view of the chassis and mixing blade assembly shown;

[0024] Figure 4 Shown Figure 3 A perspective schematic diagram of the knife assembly shown;

[0025] Figure 5 Shown Figure 4 An exploded perspective view of the knife assembly shown;

[0026] Figure 6 Shown Figure 3 A three-dimensional schematic diagram of the chassis and the rotating shaft shown;

[0027] Figure 7 Shown Figure 3 The projections of the driving hole, the first section and the second section shown on the same horizontal plane;

[0028] Figure 8 Shown Figure 3 The drive hole, the first cross section and the second cross section shown are projections of another embodiment on the same horizontal plane. DETAILED DESCRIPTION

[0029] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices consistent with some aspects of the present application as detailed in the appended claims.

[0030] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which the present invention belongs. The similar words such as "one" or "one" used in this application specification and claims do not indicate a quantitative limitation, but indicate that there is at least one. The similar words such as "include" or "include" mean that the elements or objects appearing in front of "include" or "include" cover the elements or objects listed after "include" or "include" and their equivalents, and do not exclude other elements or objects. The similar words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect. The singular forms of "one", "said" and "the" used in this application specification and the attached claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items.

[0031] See also Figures 1 to 7 The food processor 100 can be used for making soy milk, rice paste, juice, etc. The food processor 100 includes a main unit 50, a mixing cup assembly 60, and a cup cover assembly 70. The mixing cup assembly 60 is mounted on the main unit 50, and the cup cover assembly 70 is covered on the mixing cup assembly 60. The main unit 50 includes a housing and a motor disposed in the housing.

[0032] The mixing cup assembly 60 includes a mixing cup 10 and a chassis fixed to the bottom of the mixing cup 10. The mixing blade assembly is arranged at the bottom of the mixing cup 10, and the mixing blade assembly includes a rotating shaft 22 and a blade assembly 30. Among them, the rotating shaft 22 passes through the chassis 21, and the rotating shaft 22 passes through the chassis 21, and a bearing sleeve 23 and a bearing 24 are provided between the rotating shaft 22 and the chassis 21. A bearing 24 and an oil seal 26 are provided between the rotating shaft 22 and the bearing sleeve 23. In one embodiment, the mixing cup 10 includes a cup body 11 and a cup holder 12 assembled at the bottom of the cup body 11, and the chassis 21 is fixed between the cup body 11 and the cup holder 12. The cup body 11 and the cup holder 12 are assembled together by means of threads or screw buckles, and are not limited thereto. The chassis 21 is provided with electronic components such as a heating element (not indicated), a thermostat (not indicated), and a temperature sensor (not indicated). The heating element is used to heat the food in the mixing cup 10.

[0033] The rotating shaft 22 includes a driving section 220, and the driving section 220 includes a plurality of convex edges 221 extending in the up-down direction. The plurality of convex edges 221 gradually deflect along the circumference of the driving section 220, and the deflection angle of the convex edge 221 per unit length of the driving section 220 is H, and the numerical range of H is between 0.5 and 5. The length of the driving section 220 is L, and the angle of deflection of the top end of the convex edge 221 relative to the bottom end is α, H=α / L, and the unit of H is "degree / mm". When H is less than 0.5, the deflection angle of the convex edge 221 cannot effectively limit the knife assembly 30, resulting in the risk that the knife assembly 30 may detach from the rotating shaft 22 and fly out to injure people during high-speed rotation; when H is greater than 5, the knife assembly 30 is difficult to screw into the rotating shaft 22, and assembly is difficult. In some embodiments, H can be 0.5, 1, 2, 3, 4, 5, or a value between any two adjacent values ​​mentioned above.

[0034] In the illustrated embodiment, the cross section of the rotating shaft 22 is a square, and the convex edge 221 is formed by the four corners of the square cross section. In another embodiment, the rotating shaft 22 can also be a triangle or a polygon. In yet another embodiment, the rotating shaft 22 includes a cylindrical portion, and the convex edge 221 is formed by the cylindrical portion surface protruding outward.

[0035] The knife assembly 30 is detachably mounted on the rotating shaft 22. The deflection direction of the plurality of convex edges 221 from top to bottom is opposite to the rotation direction of the knife assembly 30. The knife assembly 30 includes a knife holder 31 and a blade 32 fixed to the knife holder 31. The blade 32 and / or the knife holder 31 are provided with a driving hole 320 matching the driving section 220. The driving hole 320 includes a plurality of convex corners 321 extending vertically in the up-down direction. The plurality of convex corners 321 are respectively abutted and matched with the plurality of convex edges 221. The "several convex corners 321 extending vertically" include inclinations caused by processing errors. In one embodiment, the blade 32 is provided with a driving hole 320. In another embodiment, the knife holder 31 is provided with a driving hole. In yet another embodiment, the blade 32 and the knife holder 31 are provided with a driving hole 320 together.

[0036] In the blending cup assembly 60 of the present application, since the knife assembly 30 is detachably mounted on the rotating shaft 22, when the blending cup assembly 60 needs to be cleaned after use, the user rotates the knife assembly 30 along the deflection direction of the convex edge 221, removes the knife assembly 30, and cleans it thoroughly. In this way, there is no dead corner in the blending cup assembly 60 that cannot be cleaned, which effectively avoids the situation of breeding bacteria and generating odors; at the same time, since the driving section 220 includes the convex edge 221 deflected in the circumferential direction, the driving hole 320 includes a plurality of convex corners 32 extending vertically in the up-down direction. 1. When the knife assembly 30 rotates with the rotating shaft 22, the convex edge 221 limits the convex corner 321, thereby preventing the knife assembly 30 from being separated from the rotating shaft 22, and the installation and disassembly are convenient; in addition, since the numerical range of H is between 0.5 and 5, the deflection angle of the convex edge 221 can better limit the knife assembly 30, resulting in the knife assembly 30 being difficult to be separated from the rotating shaft 22 during high-speed rotation, thereby reducing the risk of the knife assembly 30 flying out and injuring people; and the knife assembly 30 can be conveniently screwed into the rotating shaft 22, and the assembly is easy.

[0037] The radius of the circumscribed circle of the cross section of the driving section 220 is the same as the radius of the circumscribed circle of the cross section of the driving hole 320. In this way, when pouring pulp, the knife assembly 30 can be better prevented from being separated from the rotating shaft 22.

[0038] Preferably, the value range of the deflection angle H of the convex edge 221 per unit length of the driving section 220 is between 1 and 3. In this way, the deflection angle of the convex edge 221 can better effectively limit the knife assembly 30, so that the knife assembly 30 cannot be separated from the rotating shaft 22 during high-speed rotation, thereby avoiding the risk of the knife assembly 30 flying out and injuring people; and the knife assembly 30 can be more conveniently screwed into the rotating shaft 22, and the assembly is easier.

[0039] The deflection direction of the plurality of convex edges 221 from top to bottom is opposite to the rotation direction of the knife assembly 30. In this way, when the knife assembly 30 rotates with the knife shaft 22, the convex corners 321 press against the convex edges 221 in the direction opposite to the rotation direction of the knife shaft 22 (i.e., the deflection direction of the convex edges 221 from top to bottom). It can be seen that the convex edges 221 abut against at least part of the convex corners 321, and the pressing force generated by the convex edges 221 on the convex corners 321 has a downward component force, that is, the convex edges 221 deflected in the circumferential direction have a downward limiting effect on the knife assembly 30, so that the knife assembly 30 cannot be axially separated from the rotating shaft 22 upward during high-speed rotation.

[0040] Combination Figure 7, the arrow in the figure represents the screwing-out direction of the knife assembly 30. The thickness of the driving hole 320 is T, and the unit of T is millimeter. The driving section 220 includes a first section 291 flush with the top surface of the driving hole 320 and a second section 292 flush with the bottom surface of the driving hole 320. The circumradii of the circumcircles of the first section 291 and the second section 292 are both c. The apothem of the first section 291 is b1, and the apothem of the second section 292 is b2. The first section 291 includes a first vertex Q1 intersecting with the convex edge 221, and the second section 292 includes a second vertex Q2 intersecting with the convex edge 221. The angle between the line connecting the first vertex Q1 and the center and the horizontal center line is A, and the angle between the line connecting the second vertex Q2 and the center and the line connecting the first vertex Q1 and the center is B. The gap between the first section 291 and the inner wall of the driving hole 320 is E, and the following relationships are satisfied among H, T, c, b1, b2, A, B, and E: b1 = sinA * c, b2 = sin(A + B) * c; B = H * T; E = b2 - b1 = (sin(A + H * T) - sinA) * c; 0.1 < E < 0.8. Since E = (sin(A + H * T) - sinA) * c and 0.1 mm < E < 0.8 mm, by limiting parameters such as the deflection angle H per unit length of the convex edge 221 and the thickness T of the driving hole 320, the gap E is made to satisfy the above range. In this way, on the one hand, it avoids the situation that the knife assembly 30 is not easily installed on the rotating shaft 22 due to the too small gap E, making the installation of the knife assembly 30 more labor-saving; on the other hand, it avoids the situations such as easy slag accumulation, affecting cleaning, and high noise due to the too large gap E, providing a better user experience.

[0041] In some embodiments, the gap between the first section 291 and the inner wall of the driving hole 320 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, or a value between any two adjacent ones above.

[0042] The circumcircle of the first section 291 refers to the circle that intersects with the first vertex Q1 of the first section 291. The circumcircle of the second section 292 refers to the circle that intersects with the second vertex Q2 of the second section 292. The apothem of the first section 291 refers to the vertical distance between the center of the first section 291 and the edge, that is, the vertical distance from the first vertex Q1 of the first section 291 to the horizontal center line. The apothem of the second section 292 refers to the vertical distance between the center of the second section 292 and the edge, that is, the vertical distance from the vertex of the second section 292 to the horizontal center line.

[0043] Preferably, the angle by which the top end of the convex edge 221 deflects relative to the bottom end is between 15 degrees and 75 degrees, and the height of the driving section 220 is between 8 mm and 40 mm. In this way, the convex edge 221 has a good limiting effect on the cutter assembly 30, and the cutter assembly 30 will not break away from the rotating shaft 22 during rotation or during the pouring process, and the installation and disassembly of the cutter assembly 30 are relatively convenient.

[0044] Preferably, the E satisfies the following condition: 0.15 mm < E < 0.5 mm. In this way, the cooperation between the cutter assembly 20 and the rotating shaft 22 is more stable, it is not easy to hide slag, the noise is small, and the cutter assembly 30 can be more labor-savingly installed on the rotating shaft 22 or disassembled from the rotating shaft 22.

[0045] The first cross-section 291 includes an edge 2915 located between two adjacent first convex portions Q1, and the driving hole 320 includes an inner wall surface 325 located between two adjacent convex corners 321. The gap is formed between the edge 2915 and the corresponding inner wall surface 325. In this way, a gap is formed between the edge 2915 and the inner wall surface 325, so that the resistance received by the cutter assembly 30 when installed on the rotating shaft is smaller and the installation is more labor-saving.

[0046] The convex corner 321 is planar and / or arc-shaped, and both the second convex portion Q2 and the first convex portion Q1 are in contact with the convex corner 321. In this way, the cutter assembly 30 can be assembled to the rotating shaft 22 more stably and generates less noise during operation.

[0047] The convex edge 221 includes a first convex edge 2211 and a second convex edge 2212 spaced apart from the first convex edge 2211. Both the first convex edge 2211 and the second convex edge 2212 are in contact with the convex corner 321. In this way, the cutter assembly 30 can better cooperate with the rotating shaft 22, and the overall strength of the cutter shaft 22 is better and the service life is longer.

[0048] Combined Figure 8 , in the deflection direction of the convex edge 221 from top to bottom, the first convex edge 2211 is located behind the second convex edge 2212, the first convex edge 2211 is an arc edge, and the second convex edge 2212 is a straight edge. Since the first convex edge 2211 is an arc edge, the cutter assembly 30 is guided by the first convex edge 2211 and can automatically rotate into place under its own gravity; since the second convex edge 2212 is a straight edge, when the cutter assembly 30 is rotated and disassembled, the straight edge has a greater resistance to the cutter assembly 30, so that the cutter assembly 30 is less likely to fall off during pouring.

[0049] The knife assembly 30 further includes a fixing washer 33, the blade 32 is disposed between the knife holder 31 and the fixing washer 33, and the blade 32 is fixed to the knife holder 31 and the fixing washer 33 by welding, respectively, and the blade 32 and the fixing washer 33 jointly form the driving hole 320. In this way, there is no gap between the blade 32, the knife holder 31 and the fixing washer 33, thereby preventing food residue from being hidden between the three, and the knife assembly 30 has a simple and stable structure, and a lower manufacturing cost. In addition, since the blade 32 and the fixing washer 33 jointly form the driving hole 320, the wear resistance of the blade 32 can be increased, and the life and stability of the knife assembly 30 are improved.

[0050] The blade 32 and the fixed washer 33 are respectively formed by stamping, and the blade 32 includes a first shearing straight surface 322 and a first stamping arc surface 323, and the fixed washer 33 includes a second shearing straight surface 332 and a second stamping arc surface 333. The first shearing straight surface 322 and the second shearing straight surface 332 are attached and welded together. In this way, the welding quality between the first shearing straight surface 322 and the second shearing straight surface 332 is higher, and no gap is formed between the first shearing straight surface 322 and the second shearing straight surface 332, thereby preventing food residues from hiding between the two. The first stamping arc surface 323 and the second stamping arc surface 333 are respectively located above the blade 32 and below the fixed washer 33, so that the knife assembly 30 can be smoothly installed on the rotating shaft 22, or smoothly removed from the rotating shaft 22. After the blade 32 and the fixing washer 33 are respectively stamped and formed, the burrs of the first shear straight surface 322 and the second shear straight surface 332 are removed, and then the first shear straight surface 322 and the second shear straight surface 332 are closely attached together and welded.

[0051] The cross-sections of the inner and outer surfaces of the tool rest 31 are both set to be circular. In this way, the tool rest 31 can be processed by a common lathe, which has higher processing efficiency and lower cost; and because the inner surface of the tool rest 31 is circular, the resistance between the tool rest 31 and the rotating shaft 22 is smaller, and the noise is also smaller.

[0052] The angle of deflection of the top end of the convex edge 221 relative to the bottom end is between 15 degrees and 75 degrees, the height of the driving section 220 is between 8 mm and 40 mm, and the thickness T of the driving hole 320 is between 1 mm and 6 mm. In this way, the convex edge 221 and the driving hole 320 cooperate to provide a good limiting effect on the knife assembly 30, so that the knife assembly 30 will not be separated from the rotating shaft 22 during the rotation process or the pulping process, and the installation and disassembly of the knife assembly 30 is more convenient; in addition, by limiting the thickness of the driving hole 320, the matching part of the driving hole 320 and the rotating shaft 22 has higher strength and wear resistance, thereby increasing the life and stability of the knife assembly 30.

[0053] In some embodiments, the angle at which the top of the convex edge 221 is deflected relative to the bottom can be 15 degrees, 20 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees, 75 degrees, or a value between any two of the above adjacent ones. The height of the driving section 220 can be 8 mm, 12 mm, 16 mm, 20 mm, 24 mm, 28 mm, 32 mm, 36 mm, 40 mm, or a value between any two of the above adjacent ones. The thickness of the driving hole 320 can be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, or a value between any two of the above adjacent ones. In the illustrated embodiment, the height of the driving section 220 is equal to the thickness of the driving hole 320, but is not limited thereto.

[0054] In the illustrated embodiment, the rotating shaft 22 includes a first shaft 223 and a second shaft 224, the second shaft 224 is sleeved on the first shaft 223, and the second shaft 224 includes the driving section 220. In this way, the first shaft 223 and the second shaft 224 are easier to form. The first shaft 223 is non-circular, for example, square, and the second shaft 224 is provided with a hole matching the first shaft 223, so that the second shaft 224 can be prevented from rotating relative to the first shaft 223. In some embodiments, the second shaft 224 and the first shaft 223 can be fixed together by riveting, welding, etc. In other embodiments, the second shaft 224 and the first shaft 223 can also be integrally formed.

[0055] The second shaft 224 also includes a limiting section 2241 disposed above the driving section 220, and the knife holder 31 includes a limiting hole 319 that cooperates with the limiting section 2241. Through the cooperation between the limiting hole 319 and the limiting section 2241, the knife assembly 30 can be better limited to prevent the knife assembly 30 from shaking during rotation. The limiting section 2241 is set as a round shaft, and the limiting hole 319 is set as a round hole. In this way, when the knife assembly 30 is installed upside down in the vertical direction, the first driving hole 320 cannot cooperate with the driving section 220, and the rotating shaft 22 cannot drive the knife assembly 30 to rotate. In this way, the knife assembly 30 can be prevented from being installed upside down. The limiting hole 319 can be a round hole, a polygonal hole, etc.

[0056] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A stirring blade assembly, characterized in that: It includes: A rotating shaft (22), including a driving section (220), the driving section (220) includes a plurality of convex edges (221) extending in the up and down direction, the plurality of convex edges (221) are gradually deflected along the circumferential direction of the driving section (220), and the deflection angle of the convex edge (221) per unit length of the driving section (220) is H, and the value range of H is between 0.5 and 5; and A knife assembly (30), detachably mounted on the rotating shaft (22), the knife assembly (30) includes a knife holder (31) and a blade (32) fixed to the knife holder (31), the blade (32) and / or the knife holder (31) is provided with a driving hole (320) matching the driving section (220), the driving hole (320) includes a plurality of convex corners (321) extending vertically in the up and down direction, and the plurality of convex corners (321) are respectively in abutting cooperation with the plurality of convex edges (221).

2. The stirring blade assembly according to claim 1, characterized in that: The radius of the circumscribed circle of the cross-section of the driving section (220) is the same as the radius of the circumscribed circle of the cross-section of the driving hole (320).

3. The stirring blade assembly according to claim 1, characterized in that: The deflection direction of the plurality of convex edges (221) from top to bottom is opposite to the rotation direction of the knife assembly (30).

4. The stirring blade assembly according to claim 1, characterized in that: The value range of the deflection angle H of the convex edge (221) per unit length of the driving section (220) is between 1 and 3. 。 5. The stirring blade assembly according to claim 1, characterized in that: The thickness of the driving hole (320) is T, the driving section (220) includes a first section (291) flush with the top surface of the driving hole (320) and a second section (292) flush with the bottom surface of the driving hole (320), the circumscribed circles of the first section (291) and the second section (292) both have a radius of c, the first section (291) includes a first vertex (Q1) intersecting with the convex edge (221), the second section (292) includes a second vertex (Q2) intersecting with the convex edge (221), the angle between the line connecting the first vertex (Q1) and the center and the horizontal center line is A, and the gap between the first section (291) and the inner wall of the driving hole (320) is E, and the following relationship is satisfied among H, T, c, A and E: E = (sin(A + H*T) - sinA)*c; 0.1 mm < E < 0.8 mm.

6. The stirring blade assembly according to claim 5, characterized in that: The E satisfies the following condition: 0.15 mm < E < 0.5 mm.

7. The stirring blade assembly according to claim 5, characterized in that: The first section (291) includes an edge (2915) between two adjacent first vertices (Q1), the driving hole (320) includes an inner wall surface (325) between two adjacent convex corners (321), and the gap is formed between the edge (2915) and the corresponding inner wall surface (325).

8. The stirring blade assembly according to claim 5, characterized in that: The convex corner (321) is planar and / or arc-shaped, and both the second vertex (Q2) and the first vertex (Q1) are in contact with the convex corner (321).

9. The stirring blade assembly according to claim 1, characterized in that: The convex edge (221) includes a first convex edge (2211) and a second convex edge (2212) spaced from the first convex edge (2211), and both the first convex edge (2211) and the second convex edge (2212) are in contact with the convex corner (321).

10. The stirring blade assembly according to claim 9, characterized in that: In the deflection direction of the convex edge (221) from top to bottom, the first convex edge (2211) is located behind the second convex edge (2212), and the first convex edge (2211) is an arc edge, and the second convex edge (2212) is a straight edge.

11. The stirring blade assembly according to claim 1, characterized in that: The knife assembly (30) further comprises a fixing washer (33); the blade (32) is arranged between the knife holder (31) and the fixing washer (33); the blade (32) is fixed to the knife holder (31) and the fixing washer (33) by welding, respectively; the blade (32) and the fixing washer (33) together form the driving hole (320).

12. The stirring blade assembly according to claim 11, characterized in that: The blade (32) and the fixing washer (33) are respectively formed by stamping, the blade (32) comprises a first shear straight surface (322) and a first stamping arc surface (323), the fixing washer (33) comprises a second shear straight surface (332) and a second stamping arc surface (333), and the first shear straight surface (322) and the second shear straight surface (332) are bonded and welded together.

13. The stirring blade assembly according to claim 1, characterized in that: The cross sections of the inner surface and the outer surface of the tool holder (31) are both arranged to be circular.

14. The stirring blade assembly according to claim 1, characterized in that: The angle of deflection of the top end of the convex edge (221) relative to the bottom end is between 15 degrees and 75 degrees, the height of the driving section (220) is between 8 mm and 40 mm; and / or the thickness of the driving hole (320) is between 1 mm and 6 mm.

15. The stirring blade assembly according to claim 1, characterized in that: The rotating shaft (22) comprises a first shaft (223) and a second shaft (224); the second shaft (224) is sleeved on the first shaft (223); and the second shaft (224) comprises the driving section (220).

16. The stirring blade assembly according to claim 15, characterized in that: The second shaft (224) further comprises a limiting section (2241) arranged above the driving section (220), and the tool holder (31) comprises a limiting hole (319) cooperating with the limiting section (2241).

17. A food processor, characterized in that: It includes: Host (50); A stirring cup assembly (60) is installed on the main machine (50), and the stirring cup assembly (60) comprises a stirring cup (10) and a bottom plate (21) fixed to the bottom of the stirring cup (10); The stirring blade assembly according to any one of claims 1 to 16, arranged at the bottom of the stirring cup (10), wherein: The rotating shaft (22) passes through the chassis (21), and a bearing sleeve (23) and a bearing (24) are provided between the rotating shaft (22) and the chassis (21); and A cup cover assembly (70) is arranged to cover the stirring cup assembly.

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