Blending blade assembly and food processor

Abstract

A blending blade assembly and a food processor The blending blade assembly comprises: a rotary shaft (22) comprising a driving section (220), the driving section (220) comprising a plurality of protruding ridges (221) extending between top and bottom, the plurality of protruding ridges (221) gradually deflecting along a circumferential direction of the driving section (220), and a deflection angle H of the protruding ridges (221) per unit length of the driving section (220) having a defined range of value; and, a blade assembly (30) removably mounted to the rotary shaft (22), the blade assembly (30) comprising a blade support (31) and a blade (32) fixed to the blade support (31), the blade (32) and / or the blade support (31) being provided with a driving hole (320) that matches the driving section (220), the driving hole (320) comprising a plurality of protruding corners (321) extending vertically between top and bottom, the plurality of protruding ridges (221) and the plurality of protruding corners (321) abutting and cooperating respectively. The food processor comprises the blending blade assembly.

Description

[0001] Blending Blade Assembly and Food Processor

[0002] Field of the Invention

[0003] The present application relates to the field of food processing, and in particular, to a blending blade assembly and a food processor.

[0004] Background of the Invention

[0005] As people’s quality of life keeps improving, many different kinds of food processors have emerged on the market. The functions of a food processor can mainly include, but are not limited to: making soy milk, juicing, making rice paste, grinding meat, shaving ice, making coffee, and / or preparing face masks and so on. Food processors can include machines that crush or blend food such as soy milk makers, blenders, cell wall breaking machines, dough mixers and stirring health kettles. The blending blade of an existing food processor is fixed at the bottom of a blending jar, cannot be removed, and is inconvenient to clean.

[0006] Summary of the Invention

[0007] The present application provides a blending blade assembly and a food processor, which enable the blade assembly to be conveniently removed for cleaning.

[0008] An aspect of the present application provides a blending blade assembly. The blending blade assembly comprises: a rotary shaft comprising a driving section comprising a plurality of protruding ridges extending between top and bottom, the plurality of protruding ridges gradually deflecting along a circumferential direction of the driving section, and a deflection angle H of the protruding ridges per unit length of the driving section having a defined range of value; and, a blade assembly removably mounted to the rotary shaft, the blade assembly comprising a blade support and a blade fixed to the blade support, the blade and / or the blade support being provided with a driving hole that matches the driving section, the driving hole comprising a plurality of protruding corners extending vertically between top and bottom, the plurality of protruding ridges and the plurality of protruding corners abutting and cooperating respectively. As the blade assembly is removably mounted to the rotary shaft, when a food processor needs to be cleaned after use, a user can rotate the blade assembly along the deflection direction of the protruding ridges to remove the blade assembly for thorough cleaning. In this way, the food processor no longer has a dead space that cannot be cleaned, effectively preventing bacteria growth and foul odors. At the same time, as the driving section comprises the protruding ridges that deflect along a circumferential direction and the driving hole comprises the plurality of protruding corners extending vertically between top and bottom, in the course of the blade assembly’s rotation with the rotary shaft, the protruding ridges limit the position of the protruding corners, which can prevent the blade assembly from detaching from the rotary shaft and make it convenient to mount and demount. In addition, as the range of value of H is from 0.5 to 5, the deflecting angle of the protruding ridges can limit the blade assembly relatively well, so that it is difficult for the blade assembly to detach from the rotary shaft in the course of high speed rotation, thus reducing the risk of the blade assembly flying off and injuring people. Moreover, the blade assembly can be fitted to the rotary shaft by rotation in a relatively convenient way, making it easy to assemble.

[0009] Preferably, a circumradius of a cross section of the driving section is equal to a circumradius of a cross section of the driving hole. Thus, when food contents are being poured, detachment of the blade assembly from the rotary shaft can be better prevented.

[0010] Preferably, the deflection angle H of the protruding ridges per unit length of the driving section has a range of value from 0.5 to 5, preferably from 1 to 3. Thus, the deflection angle of the protruding ridges can better limit the blade assembly effectively, preventing the blade assembly from detaching from the rotary shaft in the course of high speed rotation and thus avoiding the risk of the blade assembly flying off and injuring people. In addition, the blade assembly can be more conveniently fitted to the rotary shaft by rotation, making it easier to assemble.

[0011] Preferably, a deflection direction from top to bottom of the plurality of protruding ridges is opposite to a rotation direction of the blade assembly. Thus, at the same time as the blade assembly rotates with the rotary shaft, the protruding corners abut and press against the protruding ridges towards a direction opposite to the rotation direction of the rotary shaft (i.e., the deflection direction from top to bottom of the protruding ridges). Thus it can be seen that the protruding ridges abut against at least some of the protruding corners, and that the pressing force exerted by the protruding ridges on the protruding corners has a downward component force. In other words, the protruding ridges that deflect along a circumferential direction have a downward limiting effect on the blade assembly, so that the blade assembly cannot detach from the rotary shaft upward along an axial direction in the course of high speed rotation.

[0012] Preferably, the driving hole has a thickness T, the driving section comprises a first cross section flush with a top plane of the driving hole and a second cross section flush with a bottom plane of the driving hole when the blade assembly is mounted to the rotary shaft, a circumradius of the first cross section and a circumradius of the second cross section are both c, the first cross section has an apothem b1 , the second cross section has an apothem b2, the first cross section comprises a first vertex that intersects with the protruding ridges, the second section comprises a second vertex that intersects with the protruding ridges, there is an angle A between a line connecting the first vertex and a center and a horizontal center line, there is an angle B between a line connecting the second vertex and a center and the line connecting the first vertex and a center, there is a gap E between the first cross section and an inner wall of the driving hole, and H, T, c, b1 , b2, A, B, and E meet the following relations therebetween: b1 = sinA*c; b2 = sin(A + B)*c; B = H*T; E = b2 - b1=(sin(A + ITT) - sinA)*c; 0.1 mm < E < 0.8 mm. As E = (sin(A + ITT) - sinA)*c, and as 0.1 mm < E < 0.8 mm, by defining parameters such as the deflection angle H per unit length of the protruding ridges and the thickness T of the driving hole, the gap E is made to meet the above-described range. Thus, on one hand, difficulty in mounting the blade assembly to the rotary shaft due to the gap E being too small is avoided, rendering the mounting of the blade assembly more labor-saving; on the other hand, susceptibility to hiding food residues, affecting cleaning, and loud noise due to the gap E being too large are avoided, providing a better usage experience.

[0013] Preferably, said gap E is such that: 0.15 mm < E < 0.5 mm. Thus, the cooperation between the blade assembly and the rotary shaft is more stable, making it difficult to hide food residues, resulting in low noise, and enabling the blade assembly to be mounted to or removed from the rotary shaft in a more labor-saving way.

[0014] Preferably, the first cross section comprises an edge between two adjacent first vertices, the driving hole comprises an inner wall surface between two adjacent protruding corners, and the gap E is formed between the edge and the inner wall surface corresponding to it. Thus, with the gap E formed between the edge and the inner wall surface, the blade assembly is subject to a smaller resistance when mounted to the rotary shaft, making the mounting more labor-saving.

[0015] Preferably, the protruding corners are in a plane or cambered shape, and the second vertex and the first vertex both fit in with the protruding corners. Thus, the blade assembly can be assembled to the rotary shaft more stably and produce lower noise during operation.

[0016] Preferably, the protruding ridges comprise a first protruding ridge and a second protruding ridge spaced apart from the first protruding ridge, the first protruding ridge and the second protruding ridge both fitting in with the protruding corners. Thus, the blade assembly can better cooperate with the rotary shaft, and the rotary shaft has a better overall strength and a longer service life.

[0017] Preferably, in a deflection direction from top to bottom of the protruding ridges, the first protruding ridge is located behind the second protruding ridge, and that the first protruding ridge is a cambered ridge while the second protruding ridge is a straight ridge. As the first protruding ridge is a cambered ridge, the blade assembly is guided by the first protruding ridge so as to automatically rotate into position under its own gravity; as the second protruding ridge is a straight ridge, when the blade assembly is removed by rotation, the straight ridge exerts a stronger resistance on the blade assembly, thereby making it harder for the blade assembly to detach when food contents are being poured.

[0018] Preferably, the blade assembly further comprises a fixing gasket, the blade is arranged between the blade support and the fixing gasket, and the blade is fixed respectively to the blade support and to the fixing gasket by welding, the blade and the fixing gasket together forming the driving hole. Thus, there is no gap between the blade and the blade support or between the blade and the fixing gasket, thereby preventing food residues from hiding between the three, and the blade assembly is of a simple and stable structure and cheaper to manufacture. In addition, as the blade and the fixing gasket together form the driving hole, the wear resistance of the blade can be increased, improving the service life and stability of the blade assembly.

[0019] Preferably, the blade and the fixing gasket are respectively formed by stamping, the blade comprises a first shear upright surface and a first stamped cambered surface, the fixing gasket comprises a second shear upright surface and a second stamped cambered surface, the first shear upright surface and the second shear upright surface fit together and are welded. Thus, the quality of the welding between the first shear upright surface and the second shear upright surface is better, and there is no gap formed between the first shear upright surface and the second shear upright surface, thereby preventing food residues from hiding between the two. In addition, as the first stamped cambered surface and the second stamped cambered surface are respectively located on the blade and beneath the fixing gasket, the blade assembly can be mounted to the rotary shaft smoothly or be removed from the rotary shaft smoothly. After the blade and the fixing gasket are respectively stamped and formed, the burrs on the first shear upright surface and the second shear upright surface are removed, and then the first shear upright surface and the second shear upright surface fit together and are welded.

[0020] Preferably, cross sections of an inner surface and an outer surface of the blade support are both made to be circular in shape. Thus, the blade support can be machined by a regular lathe, making the efficiency of the machining higher and the costs lower; and as the inner surface of the blade support is circular in shape, resistance between the blade support and the rotary shaft is smaller, and noise is lower.

[0021] Preferably, a top end of the protruding ridges deflects by an angle between 15° and 75° relative to a bottom end of the protruding ridges, and / or, the driving section has a height between 8 mm and 40 mm, and / or, the driving hole has a thickness T between 1 mm and 6 mm. Thus, by cooperation between the protruding ridges and the driving hole, the position of the blade assembly is limited relatively well, the blade assembly will not detach from the rotary shaft in the course of rotation or while food contents are being poured, and it is relatively convenient to mount and remove the blade assembly. In addition, by limiting the thickness of the driving hole, there are higher strength and wear resistance where the driving hole and the rotary shaft cooperate, thereby increasing the service life and stability of the blade assembly.

[0022] Preferably, the rotary shaft comprises a first shaft and a second shaft, and the second shaft is sleeved to the first shaft and comprises the driving section. Thus, it is easier to form the first shaft and the second shaft.

[0023] Preferably, the second shaft further comprises a position limiting section arranged above the driving section, and the blade support comprises a position limiting hole that cooperates with the position limiting section. By cooperation between the position limiting hole and the position limiting section, the position of the blade assembly can be limited relatively well, preventing the blade assembly from shaking in the course of rotation.

[0024] An aspect of the present application provides a food processor. The food processor comprises the blending blade assembly as described above.

[0025] Preferably, the food processor can further comprise a host and a blending jar assembly mounted to the host, wherein the blending blade assembly is mounted to the blending jar assembly.

[0026] Preferably, the blending jar assembly can comprise a blending jar and a base disc fixed to a bottom of the blending jar, the blending blade assembly can be arranged at the bottom of the blending jar, wherein, the rotary shaft passes through the base disc so as to be mounted, and a bearing bush and a bearing are arranged between the rotary shaft and the base disc.

[0027] Preferably, the food processor can further comprise a jar lid assembly arranged to cover the blending jar assembly.

[0028] Description of the Drawings

[0029] Fig. 1 shows an exploded view in perspective of an embodiment of the food processor of the present application;

[0030] Fig. 2 shows a sectional view of the blending jar assembly shown in Fig. 1 ;

[0031] Fig. 3 shows a sectional view of the base disc and the blending blade assembly shown in Fig. 2;

[0032] Fig. 4 shows a schematic view in perspective of the blade assembly shown in Fig.3;

[0033] Fig. 5 shows an exploded view in perspective of the blade assembly shown in Fig. 4;

[0034] Fig. 6 shows a schematic view in perspective of the base disc and the rotary shaft shown in Fig. 3;

[0035] Fig. 7 shows projections of the driving hole, the first cross section and the second cross section shown in Fig. 3 on a same horizontal plane;

[0036] Fig. 8 shows projections of another embodiment of the driving hole, the first cross section and the second cross section shown in Fig. 3 on a same horizontal plane.

[0037] Detailed Description of the Invention

[0038] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, the same reference signs in different drawings indicate the same or similar elements, unless otherwise indicated. The modes of realization described in the following exemplary embodiments do not represent all the modes of realization consistent with the present application. Rather, they are merely examples of means consistent with some aspects of the present application as described in detail in the appended claims.

[0039] The terms used in the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. Unless otherwise defined, technical or scientific terms used in the present application shall have the ordinary meaning as understood by a person of the ordinary skills in the art to which the present application belongs. "One", "a / an" or similar words do not denote a quantitative limit, but rather mean the presence of at least one. In the present application, generally speaking, when there are a plurality of similar or identical items present for a same element, the features described with respect to one item are also applicable to one or more other items of the same element, unless otherwise specified. “Comprise”, "include" or similar words mean that the element or object appearing before "comprise" or "include" encompasses the element or object listed after "comprise" or "include" and its equivalent, and do not exclude other elements or objects. “Connect”, “join” or similar words are not limited to a physical or mechanical connection, but may include an electrical connection, whether direct or indirect. As used in the description and the appended claims of the present application, “a / an”, “said” and “the” in singular form are intended to include the plural form as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0040] In reference to Fig. 1 to 7, a food processor 100 can be used for making soy milk, making rice paste, juicing and so on. The food processor 100 comprises a host 50, a blending jar assembly 60 and a jar lid assembly 70. The blending jar assembly 60 is mounted to the host 50, and the jar lid assembly 70 is arranged to cover the blending jar assembly 60. The host 50 comprises a housing and an electric motor arranged inside the housing.

[0041] The blending jar assembly 60 comprises a blending jar 10 and a base disc 21 fixed to the bottom of the blending jar 10. The blending blade assembly is arranged at the bottom of the blending jar 10 and comprises a rotary shaft 22 and a blade assembly 30. The rotary shaft 22 passes through the base disc 21 so as to be mounted, and a bearing bush 23 and a bearing 24 are arranged between the rotary shaft 22 and the base disc 21 . The bearing 24 and an oil seal 26 are arranged between the rotary shaft 22 and the bearing bush 23. In an embodiment, the blending jar 10 comprises a jar body 11 and a jar base 12 assembled to the bottom of the jar body 11 . The base disc 21 is fixed between the jar body 11 and the jar base 12. The jar body 11 and the jar base 12 are assembled together by means of a thread or a rotary snap-fit, but the present invention is not limited thereto. The base disc 21 is provided with electric elements such as a heating element (not illustrated), a thermostat (not illustrated) and a temperature sensor (not illustrated). The heating element is used for heating the food material in the blending jar 10.

[0042] The rotary shaft 22 comprises a driving section 220 comprising a plurality of protruding ridges 221 extending between top and bottom. The plurality of protruding ridges 221 gradually deflect along a circumferential direction of the driving section 220, and a deflection angle H of the protruding ridges 221 on unit length of the driving section 220 has a range of value from 0.5 to 5. The length of the driving section 220 is L, the top end of the protruding ridges 221 deflects by an angle a relative to the bottom end, and H=a / L, wherein the unit of H is “degree / mm”. When H is smaller than 0.5, the deflection angle H of the protruding ridges 221 cannot limit the blade assembly 30 effectively, resulting in the risk that the blade assembly 30 may detach from the rotary shaft 22 in the course of high speed rotation and fly off and injury people; when H is greater than 5, it is difficult for the blade assembly 30 to be fitted to the rotary shaft 22 by rotation, making assembly difficult. In some embodiments, H can be 0.5, 1 , 2, 3, 4, 5, or any value between any two adjacent ones of the above-described values.

[0043] In the illustrated embodiment, the cross section of the rotary shaft 22 is square in shape, and the protruding edges 221 are formed by the four corners of the square cross section. In another embodiment, the cross section of the rotary shaft 22 can also be triangular or polygonal in shape. In yet another embodiment, the rotary shaft 22 comprises a circular cylindrical portion, and the protruding ridge 221 are formed by protruding outward from the surface of the circular cylindrical portion.

[0044] The blade assembly 30 is removably mounted to the rotary shaft 22. The deflection direction of the plurality of protruding ridges 221 from top to bottom is opposite to the rotation direction of the blade assembly 30. The blade assembly 30 comprises a blade support 31 and a blade 32 fixed to the blade support 31. The blade 32 and / or the blade support 31 is provided with a driving hole 320 that matches the driving section 220. The driving hole 320 comprises a plurality of protruding corners 321 extending vertically between top and bottom. The plurality of protruding ridges 221 and the plurality of protruding corners 321 abut and cooperate respectively. The expression “a plurality of protruding corners 321 extending vertically” includes an inclination resulting from machining errors. In an embodiment, the blade 32 is provided with the driving hole 320. In another embodiment, the blade support 31 is provided with the driving hole 320. In yet another embodiment, the blade 32 and the blade support 31 are together provided with the driving hole 320.

[0045] With the blending jar assembly 60 of the present application, as the blade assembly 30 is removably mounted to the rotary shaft 22, when the blending jar assembly 60 needs to be cleaned after use, a user can rotate the blade assembly 30 along the deflection direction of the protruding ridges 221 to remove the blade assembly 30 for thorough cleaning. Thus, the blending jar assembly 60 no longer has any dead space that cannot be cleaned, effectively preventing bacteria growth and foul odors. At the same time, as the driving section 220 comprises the protruding ridges 221 that deflect along a circumferential direction, and as the driving hole 320 comprises the plurality of protruding corners 321 extending vertically between top and bottom, in the course of the blade assembly 30 rotating with the rotary shaft 22, the protruding ridges 221 have a position-limiting effect on the protruding corners 321 , which can prevent the blade assembly 30 from detaching from the rotary shaft 22 and make it convenient to mount and remove. In addition, as H is within a range of value from 0.5 to 5, the deflection angle of the protruding ridges 221 can limit the blade assembly 30 relatively well, so that it is difficult for the blade assembly 30 to detach from the rotary shaft 22 during high speed rotation, thus reducing the risk of the blade assembly 30 flying off and injuring people. Moreover, the blade assembly 30 can be fitted to the rotary shaft 22 by rotation in a relatively convenient way, making it easy to assemble.

[0046] The circumradius of a cross section of the driving section 220 is equal to the circumradius of a cross section of the driving hole 320. Thus, when food contents in the jar are being poured, detachment of the blade assembly 30 from the rotary shaft 22 can be better prevented.

[0047] Preferably, the deflection angle H of the protruding ridges 221 on unit length of the driving section 220 has a range of value from 1 to 3. Thus, the deflection angle of the protruding ridges 221 can better limit the blade assembly 30 effectively, making the blade assembly 30 unable of detaching from the rotary shaft 22 during high speed rotation and thus avoiding the risk of the blade assembly 30 flying off and injuring people; in addition, the blade assembly 30 can be more conveniently fitted to the rotary shaft 22 by rotation, making it easier to assemble.

[0048] The deflection direction from top to bottom of the plurality of protruding ridges 221 is opposite to the rotation direction of the blade assembly 30. Thus, at the same time as the blade assembly 30 rotates with the rotary shaft 22, the protruding corners 321 abut and press against the protruding ridges 221 towards a direction opposite to the rotation direction of the rotary shaft 22 (i.e., the deflection direction from top to bottom of the protruding ridges 221). Thus it can be seen that the protruding ridges 221 abut against at least some of the protruding corners 321 , and a pressing force exerted by the protruding ridges 221 on the protruding corners 321 has a downward component force. In other words, the protruding ridges 221 that deflect along a circumferential direction have a downward limiting effect on the blade assembly 30, making the blade assembly 30 unable of detaching upward along an axial direction from the rotary shaft 22 during high speed rotation.

[0049] In reference to Fig. 7, the arrow therein represents a rotation-out direction of the blade assembly 30. The driving hole 320 has a thickness T, the unit of which is mm. The driving section 220 comprises a first cross section 291 flush with the top plane of the driving hole 320 and a second cross section 292 flush with the bottom plane of the driving hole 320. The circumradius of the first cross section 291 and the circumradius of the second cross section 292 are both c. The first cross section 291 has an apothem b1. The second cross section 292 has an apothem b2. The first cross section 291 comprises a first vertex Q1 that intersects with the protruding ridges 221. The second section 292 comprises a second vertex Q2 that intersects with the protruding ridges 221. There is an angle A between the line connecting the first vertex Q1 and the center and the horizontal center line. There is an angle B between the line connecting the second vertex Q2 and the center and the line connecting the first vertex Q1 and the center. There is a gap E between the first cross section 291 and an inner wall of the driving hole 320. And, H, T, c, b1 , b2, A, B and E meet the following relations therebetween: b1 = sinA*c; b2 = sin(A + B)*c; B = ITT;

[0050] E = b2 - b1 =(sin(A + ITT) - sinA)*c;

[0051] 0.1 < E < 0.8.

[0052] As E = (sin(A + ITT) - sinA)*c, and as 0.1 mm < E < 0.8 mm, by defining parameters such as the deflection angle H per unit length of the protruding ridges and the thickness T of the driving hole, the gap E can be made to meet the above-described range. Thus, on one hand, difficulty in mounting the blade assembly 30 to the rotary shaft 22 due to the gap E being too small is avoided, rendering the mounting of the blade assembly 30 more labor-saving; on the other hand, susceptibility to hiding food residues, affecting cleaning and loud noise due to the gap E being too large are avoided, providing a better usage experience.

[0053] In some embodiments, the gap E between the first cross 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 any value between any two adjacent ones of the above-described values.

[0054] The circumcircle of the first cross section 291 refers to a circle that intersects with all the first vertices Q1 of the first cross section 291. The circumcircle of the second cross section 292 refers to a circle that intersects with all the second vertices Q2 of the second cross section 292. The apothem of the first cross section 291 refers to the perpendicular distance between the center and an edge of the first cross section 291 , that is, the perpendicular distance between a first vertex Q1 of the first cross section 291 and the horizontal center line. The apothem of the second cross section 292 refers to the perpendicular distance between the center and an edge of the second cross section 292, that is, the perpendicular distance between a second vertex Q2 of the second cross section 292 and the horizontal center line.

[0055] Preferably, the top end of the protruding ridges 221 deflects by an angle between 15° and 75° relative to the bottom end, and the driving section 220 has a height between 8 mm and 40 mm. Thus, the protruding ridges 221 limit the position of the blade assembly 30 relatively well, the blade assembly 30 will not detach from the rotary shaft 22 in the course of rotation or when food contents are being poured, and the blade assembly 30 is convenient to mount and remove.

[0056] Preferably, said gap E is such that: 0.15 mm < E < 0.5 mm. Thus, the cooperation between the blade assembly 30 and the rotary shaft 22 is more stable, making it harder to hide food residues, resulting in low noise, and enabling the blade assembly 30 to be mounted to or removed from the rotary shaft 22 in a more labor-saving way.

[0057] The first cross section 291 comprises an edge 2915 between two adjacent first vertices Q1 , the driving hole 320 comprises an inner wall surface 325 between two adjacent protruding corners 321 , and the gap E is formed between the edge 2915 and the inner wall surface 325 corresponding to it. Thus, with the gap formed between the edge 2915 and the inner wall surface 325, the blade assembly 30 is subject to a smaller resistance when mounted to the rotary shaft 22, making the mounting more labor-saving.

[0058] The protruding corners 321 are in a plane and / or cambered shape, and the second vertices Q2 and the first vertices Q1 all fit in with the protruding corners 321. Thus, the blade assembly 30 can be assembled to the rotary shaft 22 more stably and produce lower noise during operation.

[0059] The protruding ridges 221 comprise a first protruding ridge 2211 and a second protruding ridge 2212 spaced apart from the first protruding ridge 2211 , the first protruding ridge

[0060] 2211 and the second protruding ridge 2212 both fitting in with the protruding corners 321. Thus, the blade assembly 30 can better cooperate with the rotary shaft 22, and the rotary shaft 22 has a better overall strength and a longer service life.

[0061] In reference to Fig. 8, in the deflection direction from top to bottom of the protruding ridges 221 , the first protruding ridge 2211 is located behind the second protruding ridge 2212; and the first protruding ridge 2211 is a cambered ridge while the second protruding ridge

[0062] 2212 is a straight ridge. As the first protruding ridge 2211 is a cambered ridge, the blade assembly 30 is guided by the first protruding ridge 2211 so as to automatically rotate into position under its own gravity; as the second protruding ridge 2212 is a straight ridge, when the blade assembly 30 is being removed by rotation, the straight ridge exerts a stronger resistance on the blade assembly 30, thereby making it harder for the blade assembly 30 to detach when food contents are being poured.

[0063] The blade assembly 30 further comprises a fixing gasket 33, the blade 32 is arranged between the blade support 31 and the fixing gasket 33, the blade 32 is fixed respectively to the blade support 31 and to the fixing gasket 33 by welding, and the blade 32 and the fixing gasket 33 together form the driving hole 320. Thus, there will be no gap between the blade 32 and the blade support 31 and between the blade 32 and the fixing gasket 33, thereby preventing food residues from hiding between the three, and the blade assembly 30 is of a simple and stable structure and is cheaper to manufacture. In addition, as the blade 32 and the fixing gasket 33 together form the driving hole 320, the wear resistance of the blade 32 can be increased, improving the service life and stability of the blade assembly 30.

[0064] The blade 32 and the fixing gasket 33 are respectively formed by stamping, the blade 32 comprises a first shear upright surface 322 and a first stamped cambered surface 323, the fixing gasket 33 comprises a second shear upright surface 332 and a second stamped cambered surface 333, the first shear upright surface 322 and the second shear upright surface 332 fit together and are welded. Thus, the quality of the welding between the first shear upright surface 322 and the second shear upright surface 332 is better, and there is no gap formed between the first shear upright surface 322 and the second shear upright surface 332, thereby preventing food residues from hiding between the two. In addition, the first stamped cambered surface 323 and the second stamped cambered surface 333 are located respectively on the blade 32 and beneath the fixing gasket 33, so that the blade assembly 30 can be mounted to the rotary shaft 22 smoothly or be removed from the rotary shaft 22 smoothly. After the blade 32 and the fixing gasket 33 are respectively stamped, the burrs on the first shear upright surface 322 and the second shear upright surface 332 are removed, and then the first shear upright surface 322 and the second shear upright surface 332 fit together and are welded.

[0065] The cross sections of an inner surface and an outer surface of the blade support 31 are both made to be circular in shape. Thus, the blade support 31 can be machined by a regular lathe, the machining efficiency is higher, and costs are lower; and as the inner surface of the blade support 31 is circular in shape, resistance between the blade support 31 and the rotary shaft 22 is smaller, and noise is lower.

[0066] The top end of the protruding ridges 221 deflects by an angle between 15° and 75° relative to the bottom end, the driving section 220 has a height between 8 mm and 40 mm, and the driving hole 320 has a thickness T between 1 mm and 6 mm. Thus, by cooperation between the protruding ridges 221 and the driving hole 320, the position of the blade assembly 30 is limited relatively well, the blade assembly 30 will not detach from the rotary shaft 22 in the course of rotation or while food contents are being poured, and it is relatively convenient to mount and remove the blade assembly 30. In addition, by defining the thickness T of the driving hole 320, there are higher strength and wear resistance where the driving hole 320 and the rotary shaft 22 cooperate, thereby improving the service life and stability of the blade assembly 30.

[0067] In some embodiments, the top end of the protruding ridges 221 can deflect, relative to the bottom end, by an angle of 15 degrees, 20 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees, 75 degrees or any value between any two adjacent ones of the above-described values. 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 any value between any two adjacent ones of the above-described values. The thickness of the driving hole 320 can be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm or any value between any two adjacent ones of the above-described values. In the illustrated embodiment, the height of the driving section 220 is equal to the thickness of the driving hole 320, but the present invention is not limited thereto.

[0068] In the illustrated embodiment, the rotary shaft 22 comprises a first shaft 223 and a second shaft 224, and the second shaft 224 is sleeved to the first shaft 223 and comprises the driving section 220. Thus, it is easier to form the first shaft 223 and the second shaft 224. The first shaft 223 is not circular in shape, for example, it is square in shape. The second shaft 224 is provided with a hole that matches the first shaft 223. Thus, rotation of the second shaft 224 relative to the first shaft 223 can be prevented. In some embodiments, the second shaft 224 and the first shaft 223 can be fixed together by means of riveting, welding and so on. In some other embodiments, the second shaft 224 and the first shaft 223 can also be formed integrally.

[0069] The second shaft 224 further comprises a position limiting section 2241 arranged above the driving section 220, and the blade support 31 comprises a position limiting hole 319 that cooperates with the position limiting section 2241. By cooperation between the position limiting hole 319 and the position limiting section 2241 , the position of the blade assembly 30 can be limited relatively well, preventing the blade assembly 30 from shaking in the course of rotation. The position limiting section 2241 is arranged to be a circular shaft, and the position limiting hole 319 is arranged to be a circular hole. Thus, when the blade assembly 30 is mounted upside down, the driving hole 320 cannot cooperate with the driving section 220. In this situation, the rotary shaft 22 cannot drive the blade assembly 30 to rotate. Thus, mounting the blade assembly 30 upside down can be prevented. The position limiting hole 319 can be a circular hole, a polygonal hole, etc.

[0070] What has been described above are only preferred embodiments of the present application and are 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

Claims1 . A blending blade assembly, characterized in that it comprises:- a rotary shaft (22) which comprises a driving section (220) comprising a plurality of protruding ridges (221) extending between top and bottom, the plurality of protruding ridges (221) gradually deflecting along a circumferential direction of the driving section (220), and a deflection angle H of the protruding ridges (221) per unit length of the driving section (220) having a defined range of value; and- a blade assembly (30) removably mounted to the rotary shaft (22), the blade assembly (30) comprising a blade support (31) and a blade (32) fixed to the blade support (31), the blade (32) and / or the blade support (31) being provided with a driving hole (320) that matches the driving section (220), the driving hole (320) comprising a plurality of protruding corners (321) extending vertically between top and bottom, the plurality of protruding ridges (221) and the plurality of protruding corners (321) abutting and cooperating respectively.

2. The blending blade assembly of claim 1 , characterized in that, a circumradius of a cross section of the driving section (220) is equal to a circumradius of a cross section of the driving hole (320).

3. The blending blade assembly of any one of claims 1 to 2, characterized in that, a deflection direction from top to bottom of the plurality of protruding ridges (221) is opposite to a rotation direction of the blade assembly (30).

4. The blending blade assembly of any one of claims 1 to 3, characterized in that, the deflection angle H of the protruding ridges (221) per unit length of the driving section (220) has a range of value from 0.5 to 5, preferably from 1 to 3.

5. The blending blade assembly of any one of claims 1 to 4, characterized in that, the driving hole (320) has a thickness T, the driving section (220) comprises a first cross section (291) flush with a top plane of the driving hole (320) and a second cross section (292) flush with a bottom plane of the driving hole (320) when the blade assembly (30) is mounted to the rotary shaft (22), a circumradius of the first cross section (291) and a circumradius of the second cross section (292) are both c, the first cross section (291) comprises a first vertex (Q1) that intersects with the protruding ridges (221), the second section (292) comprises a second vertex (Q2) that intersects with the protruding ridges (221), there is an angle A between a line connecting the first vertex (Q1) and a center and a horizontal center line, there is a gap E between the first cross section (291) and an inner wall of the driving hole (320), and H, T, c, A, and E meet following relations therebetween:E = (sin(A + H*T) - sinA)*c;0.1 mm < E < 0.8 mm.

6. The blending blade assembly of claim 5, characterized in that, said gap E is such that: 0.15 mm < E < 0.5 mm.

7. The blending blade assembly of any one of claims 5 to 6, characterized in that, the first cross section (291) comprises an edge (2915) between two adjacent first vertices (Q1), the driving hole (320) comprises an inner wall surface (325) between two adjacent protruding corners (321), and the gap E is formed between the edge (2915) and the inner wall surface (325) corresponding to it.

8. The blending blade assembly of any one of claims 5 to 7, characterized in that, the protruding corners (321) are in a plane or cambered shape, and the second vertex (Q2) and the first vertex(Q1) both fit in with the protruding corners (321).

9. The blending blade assembly of any one of claims 1 to 8, characterized in that, the protruding ridges (221) comprise a first protruding ridge (2211) and a second protruding ridge (2212) spaced apart from the first protruding ridge (2211), the first protruding ridge (2211) and the second protruding ridge (2212) both fitting in with the protruding corners (321).

10. The blending blade assembly of claim 9, characterized in that, in a deflection direction from top to bottom of the protruding ridges (221), the first protruding ridge (2211) is located behind the second protruding ridge (2212), and that the first protruding ridge (2211) is a cambered ridge while the second protruding ridge (2212) is a straight ridge.

11. The blending blade assembly of any one of claims 1 to 10, characterized in that, the blade assembly (30) further comprises a fixing gasket (33), the blade (32) is arranged between the blade support (31) and the fixing gasket (33), and the blade (32) is fixed respectively to the blade support (31) and to the fixing gasket (33) by welding, the blade(32) and the fixing gasket (33) together form the driving hole (320).

12. The blending blade assembly of claim 11 , characterized in that, the blade (32) and the fixing gasket (33) are respectively formed by stamping, the blade (32) comprises a first shear upright surface (322) and a first stamped cambered surface (323), the fixing gasket(33) comprises a second shear upright surface (332) and a second stamped cambered surface (333), the first shear upright surface (322) and the second shear upright surface (332) fit together and are welded.

13. The blending blade assembly of any one of claims 1 to 12, characterized in that, cross sections of an inner surface and an outer surface of the blade support (31) are both madeto be circular in shape.

14. The blending blade assembly of any one of claims 1 to 13, characterized in that, a top end of the protruding ridges (221) deflects by an angle between 15° and 75° relative to a bottom end of the protruding ridges (221), and / or, the driving section (220) has a height between 8 mm and 40 mm, and / or, the driving hole (320) has a thickness between 1 mm and 6 mm.

15. The blending blade assembly of any one of claims 1 to 14, characterized in that, the rotary shaft (22) comprises a first shaft (223) and a second shaft (224), and the second shaft (224) is sleeved to the first shaft (223) and comprises the driving section (220).

16. The blending blade assembly of claim 15, characterized in that, the second shaft (224) further comprises a position limiting section (2241) arranged above the driving section (220), and the blade support (31) comprises a position limiting hole (319) that cooperates with the position limiting section (2241).

17. A food processor, characterized in that it comprises the blending blade assembly of any one of claims 1 to 16.

18. The food processor of claim 17, characterized in that it further comprises: a host (50); a blending jar assembly (60) mounted to the host (50), wherein the blending blade assembly is mounted to the blending jar assembly (60).

19. The food processor of claim 18, characterized in that: the blending jar assembly (60) comprises a blending jar (10) and a base disc (21) fixed to a bottom of the blending jar (10), the blending blade assembly is arranged at the bottom of the blending jar (10), the rotary shaft (22) passes through the base disc (21) so as to be mounted, and a bearing bush (23) and a bearing (24) are arranged between the rotary shaft (22) and the base disc (21).

20. The food processor of any one of claims 18-19, characterized in that it further comprises a jar lid assembly (70) arranged to cover the blending jar assembly (60).

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