Crushing cup assembly of food processor and food processor

Abstract

The utility model provides a crushing cup assembly of a food processor and the food processor, the crushing cup assembly comprises a crushing cup, a crushing cutter for kneading dough, a clamping gasket between the bottom surface of a positioning shaft and the inner bottom surface of the crushing cup, and a positioning hole with a downward opening is formed in the positioning shaft; the height H of the cutter shaft, the radial matching height H1 of the positioning shaft and the positioning groove, the transverse width L1 of the bottom face of the positioning shaft making contact with the top face of the gasket, the outer diameter D1 of the bottom face of the positioning shaft, the outer diameter D3 of the bottom face of the shaft sleeve and the diameter D2 of the positioning hole meet the conditions that H1 is larger than or equal to 0.15 H-2, H1 is smaller than or equal to 30 mm, L1 is larger than or equal to 0.18 H1 and smaller than or equal to D1-D2, and D1 is smaller than or equal to D3. The problem that a positioning shaft of a food processor with a dough kneading function is easy to loosen in a dough kneading state is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of food processing equipment, in particular to a grinding cup assembly of a food processing machine. Background Art

[0002] Existing food processing machines, such as meat grinders, generally include a main machine with a motor installed therein, a crushing cup assembly arranged below the main machine, and the crushing cup assembly includes a crushing cup, a cup cover arranged at the mouth of the crushing cup, and a crushing knife detachably mounted on the crushing cup. Among them, the top of the crushing knife passes through the through hole of the cup cover and is driven and matched with the output end of the motor, the bottom of the crushing knife is provided with a positioning groove and is plugged and matched with the positioning shaft protruding from the inner bottom surface of the crushing cup, and a gasket is clamped between the bottom surface of the positioning shaft and the inner bottom surface of the crushing cup. Specifically, the positioning shaft is also provided with a positioning hole with an opening facing downward, and a screw is used as a fastener, which passes through the bottom of the crushing cup and the gasket from the outer bottom surface of the crushing cup from bottom to top and penetrates into the positioning hole in turn to lock the positioning shaft, the gasket and the crushing cup. Generally speaking, the diameter of the screw used is 3mm, and the diameter of the positioning hole adapted thereto is also about 3mm. In order to ensure that the screw can reliably lock the positioning shaft and the crushing cup, the engagement height of the screw and the positioning hole is usually not less than 5mm.

[0003] Regarding the shape of the positioning shaft, the prior art discloses a meat grinder, including a blade shaft and blades distributed on the blade shaft, a sleeve is embedded at the bottom end of the inner cavity of the blade shaft, a positioning groove is formed inside the sleeve, and the positioning shaft is inserted into the positioning groove to limit the crushing knife. Specifically, the positioning shaft is divided into two sections, the upper section has a smaller diameter and the lower section has a larger diameter, the height of the upper section is greater than the height of the lower section, the positioning groove of the sleeve is configured to imitate the positioning shaft, that is, the side wall of the positioning shaft is fitted with the positioning groove. Alternatively, the positioning shaft is in the shape of a straight cylinder, and the outer side wall of the straight cylinder-shaped positioning shaft is fitted with the inner side wall of the positioning groove. Regardless of the above shape of the positioning shaft, the existing clearance between the positioning shaft and the positioning groove limit fitting section is 0.15mm, the outer diameter of the bottom of the positioning shaft is approximately between 6mm-8mm, and the contact area between the positioning shaft and the gasket is approximately 28mm. 2 When the knife axis is tilted to the maximum point, the fit clearance is 0.3mm.

[0004] In order to expand the multi-functions, some meat grinders usually use one host to adapt multiple crushing knives. The crushing knives can be meat grinders, egg beaters, dough knives, etc. In other words, accessories such as meat grinders, egg beaters, dough knives, etc. can be used interchangeably. However, there is often only one cup body, and even if there are multiple ones, the positioning axis in the cup body is unified. Alternatively, the meat grinder is set with multiple gears, but there is only one crushing knife, which is used for meat grinding in high gear and for dough kneading in low gear. In other words, a crushing knife and a positioning axis in a crushing cup need to adapt to two different working states.

[0005] The applicant found in the test that no matter it is one or more crushing knives, as long as it is in the functional state of dough kneading, in the scenario of making 900 grams of dough with 600 grams of flour + 300 grams of water, or in the scenario of exceeding the rated capacity, the crushing knife is subjected to a large load of dough, and the knife shaft of the crushing knife deflects and exerts pressure on the positioning shaft. Since the positioning shaft and the inner wall of the sleeve have a long matching dimension in height, the positioning shaft has a long force arm on the bottom of the crushing cup and the gasket. In other words, the vertical force on the positioning shaft is large, which can easily cause the gasket and the bottom wall of the crushing cup to be crushed and deformed. If the crushing cup is a glass cup, the bottom wall of the glass cup may also crack. Utility Model Content

[0006] The utility model provides a crushing cup assembly of a food processing machine and a food processing machine, aiming to solve the problem of how to enable a positioning shaft to solve the problem of gasket and bottom wall of the crushing cup being crushed, deformed or even cracked in a dough kneading scenario with a large load, on the premise that the crushing knife used by the food processing machine can be used for dough kneading.

[0007] The technical solution adopted by the utility model is:

[0008] The present application provides a grinding cup assembly of a food processing machine, comprising a grinding cup, a grinding knife arranged in the grinding cup and driven by a motor, the grinding knife can be used for kneading dough, a positioning shaft is convexly provided on the inner bottom surface of the grinding cup, a shaft sleeve is embedded at the bottom of the blade shaft of the grinding knife, the shaft sleeve is provided with a positioning groove with an opening facing downward, the positioning groove is plug-matched with the positioning shaft, a gasket is clamped and installed between the bottom surface of the positioning shaft and the inner bottom surface of the grinding cup, the height of the blade shaft is H, the height of the radial matching between the positioning shaft and the positioning groove is H1, the lateral width of the bottom surface of the positioning shaft in contact with the top surface of the gasket is L1, the outer diameter of the bottom surface of the positioning shaft is D1, the outer diameter of the bottom surface of the sleeve is D3, a positioning hole with an opening facing downward is provided in the positioning shaft, the positioning hole is used to cooperate with a fastener to lock the positioning shaft to the bottom of the grinding cup, and the diameter of the positioning hole is D2, wherein 0.15H-2≤H1, H1≤30mm, 0.18H1≤L1≤D1-D2, D1≤D3.

[0009] Preferably, the positioning shaft includes a main body section extending into the positioning groove and radially limited with the inner side wall of the positioning groove, and a tail section arranged below the main body section and radially expanded, the bottom surface of the tail section is arranged lower than the bottom surface of the sleeve, and a gasket is clamped between the bottom surface of the tail section and the inner bottom surface of the crushing cup.

[0010] Preferably, the crushing knife includes a meat grinder and a dough kneading knife that can be used interchangeably with the meat grinder, and a guide section that is radially reduced relative to the main body section is further provided above the positioning shaft. When the crushing knife is a meat grinder, the guide section and the main body section are both radially limited with the inner side wall of the positioning groove. When the crushing knife is a dough kneading knife, the fitting clearance between the guide section and the inner side wall of the positioning groove is greater than the fitting clearance between the main body section and the inner side wall of the positioning groove.

[0011] Preferably, the outer surface of the tail section includes a first annular surface arranged to be inclined radially outward and downward, and the inner surface of the positioning groove is provided with a matching inclined surface that is limitedly matched with the first annular surface.

[0012] Preferably, the tail section also includes a second annular surface arranged below the first annular surface, the second annular surface extends from the bottom edge of the first annular surface toward the gasket to intersect the gasket perpendicularly, and the outer diameter of the gasket is not less than the outer diameter of the second annular surface.

[0013] Preferably, the positioning shaft includes a guide section located at the top, and a body section located below the guide section and radially expanded, the height of the guide section is H2, the height of the body section is H3, wherein H2 and H3 satisfy: 0.25≤H2 / H3≤0.75.

[0014] Preferably, the outer side surface of the shaft sleeve of the pulverizing knife is provided with a plurality of upper steps with the step surface facing upward, and the inner cavity of the knife shaft of the pulverizing knife is provided with a lower step which cooperates with the plurality of upper steps in a limiting manner.

[0015] Preferably, the multiple upper steps include a first upper step and a second upper step, the first upper step is located above half the height of the positioning shaft, and the second upper step is located below half the height of the positioning shaft.

[0016] Preferably, the positioning shaft comprises a guide section located at the top, and a body section arranged below the guide section and radially expanding, the bottom end of the guide section is connected to the top end of the body section via a transition surface, and the transition surface extends radially outward and downward; or,

[0017] The positioning shaft also includes a guide section at the top, the top of the guide section is an upwardly raised arc surface, the center of the arc surface is provided with a plane abutting against the top surface of the positioning groove, and the ratio of the outer diameter of the plane to the outer diameter of the guide section is between 0.1 and 0.5.

[0018] The embodiment of the present application also provides a food processor, including a main machine with a motor installed therein, and a cup cover arranged at the mouth of a grinding cup, characterized in that the food processor also includes any one of the grinding cup components described above.

[0019] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0020] 1. The utility model provides a food processing machine. Based on the prior art, when the consumer operates the machine with over-capacity or the rated capacity is large, the gasket and the bottom of the crushing cup are easily deformed by pressure, and the glass cup is easily cracked. The utility model first sets a gasket between the bottom surface of the positioning shaft and the inner bottom surface of the crushing cup to avoid direct contact between the bottom surface of the positioning shaft and the inner bottom surface of the crushing cup, which will cause friction, wear and abnormal noise.

[0021] In this solution, H1≤30mm is set to avoid the situation where the positioning shaft is too long, resulting in a deep positioning groove, which is difficult for consumers to clean. On the other hand, 0.15H-2≤H1 is also required to make the deflection of the top of the knife shaft less than 2mm, and the knife shaft will not slip relative to the positioning shaft, meeting the design requirements.

[0022] Furthermore, we know that, under the premise that the lateral width L1 of the bottom surface of the positioning shaft in contact with the top surface of the gasket remains unchanged, the longer the height H1 of the radial fit between the positioning shaft and the positioning groove, the better the alignment of the crushing knife and the positioning shaft, and the less likely the crushing knife will deflect, but the more difficult it will be to clean the positioning groove. Under the premise that the H1 value remains unchanged, the larger the lateral width L1 of the bottom surface of the positioning shaft in contact with the top surface of the gasket, the smaller the vertical force per unit area of ​​the gasket, and the less likely the bottom of the gasket and the crushing cup will be compressed and deformed, or even cause the positioning shaft to loosen. However, the height of the shaft sleeve needs to be increased to avoid the gasket setting, causing the overall knife shaft to move upward, affecting the lifting effect of the bottommost blade on the bottom surface of the crushing cup. Therefore, the H1 and L1 values ​​are two interrelated parameters.

[0023] During the research process, the applicant set the H1 value to a minimum of 5mm (i.e. when the vertical lever arm is the smallest). At this height, if the L1 value is less than 3.71mm, although the positioning shaft will not loosen, due to the short positioning shaft, the lateral deflection of the cutter shaft is greater than 2mm, which can easily cause the top of the cutter shaft to get stuck relative to the output end of the host, or the bottom of the cutter shaft to get stuck relative to the positioning shaft, and the user's installation experience when aligning the host with the cutter shaft is also poor. However, in order to solve the problem of the cutter shaft deflection, we found that when the H1 value is above 22.65mm, the deflection of the cutter shaft meets the design requirements. Therefore, the applicant sets the L1 value to be greater than or equal to 0.18H1 to avoid the problem of the positioning shaft loosening due to the crushing and deformation of the gasket when the L1 value is less than 0.18H1, and / or the deflection of the top of the crushing cutter shaft is greater than 2mm, causing the cutter shaft to slip relative to the positioning shaft.

[0024] On the other hand, considering that the bottom surface of the positioning shaft must have a width of the positioning hole for the fastener to extend into to lock the positioning shaft, the gasket and the bottom wall of the crushing cup, the maximum value of L1 that can be set is the difference between the diameter of the bottom surface of the positioning shaft and the diameter of the positioning hole, that is, L1 = D1-D2. As for where (D1-D2) can extend to, considering the turbulence problem at the bottom of the crushing cup, the bottom surface of the positioning shaft set in this application can be extended to be vertically flush with the outer diameter of the bottom surface of the sleeve, that is, when D1 = D3, the L1 value reaches the maximum. In this case, it is also beneficial to only raise the bottom of the sleeve to allow the bottom of the positioning shaft to bulge radially outward, and the overall height of the knife shaft will not be too high. If the outer diameter of the positioning shaft is set to D1>D3, the bottom of the positioning shaft must be radially convex outward. In order to avoid friction between the bottom of the cutter shaft and the gasket, the bottom of the cutter shaft needs to be too high, and the blade at the bottom of the cutter shaft also needs to be raised. Without changing the original blade shape, the gap between the blade and the bottom of the crushing cup increases, which does not play a good role in lifting the material at the bottom of the crushing cup. It can be concluded that L1 should satisfy 0.18H1≤L1≤D1-D2, and D1≤D3.

[0025] To sum up, the scheme of the present application, by limiting the H value, L1 value and the relationship between H1, and the L1 value and the relationship between D1, D2, and D3, achieves the goal of not affecting the material effect at the bottom of the crushing cup, not making the inside of the knife shaft difficult to clean, and not making the crushing knife shaft easy to slip relative to the positioning shaft, and not causing the gasket to be compressed and deformed, resulting in the loosening of the positioning shaft, and even the risk of the glass cup cracking when the crushing cup is a glass cup.

[0026] 2. As a preferred embodiment of the present application, the present application sets the main body section to cooperate radially with the inner side wall of the positioning groove, so that when the cutter shaft is subjected to a deflection force, the main body section can provide a force in the opposite direction of the deflection force to straighten the cutter shaft. The contact width L1 between the bottom surface of the positioning shaft and the top surface of the gasket is increased by the radially enlarged tail section, thereby reducing the risk of crushing the gasket and the bottom of the crushing cup. At the same time, in order not to cause other additional problems, the bottom surface of the tail section is also set lower than the bottom surface of the sleeve to avoid direct contact between the gasket and the sleeve when the outer diameter of the gasket is larger than the outer diameter of the tail section, thereby avoiding wear problems.

[0027] 3. In order to make a positioning shaft adaptable to different crushing knives, and in different functional states, there will be no serious deviation of the knife shaft, loosening of the positioning shaft, and crushing of the gasket and the bottom wall of the crushing cup, in this application, it is also provided that the crushing knife is provided to include a meat grinder and a dough knives, and the knife shafts of the meat grinder and the dough knives are respectively provided to be different shapes. Specifically, when the crushing knife is a meat grinder, the guide section and the body section are provided to cooperate with the radial limit of the inner wall of the positioning groove to increase the matching height H1 between the inner wall of the positioning groove and the positioning shaft, so that the positioning shaft has a good straightening effect on the meat grinder, ensures the coaxiality of the positioning shaft and the knife shaft, and reduces the working noise. At the same time, because the meat is soft and not easy to form a ball in the minced meat state, the load on the meat grinder is much smaller than that on the dough knives. At this time, the guide section and the body section are provided to cooperate with the radial limit of the inner wall of the positioning groove. Although the force arm is increased, due to the small load, it is still difficult to have the risk of the positioning shaft loosening and the gasket and the bottom wall of the crushing cup being crushed. When the crushing knife is a dough kneading knife, due to the large load, it is necessary to reduce the vertical force arm to reduce the risk of the positioning shaft loosening and the gasket and the bottom wall of the crushing cup being crushed. Specifically, the fitting clearance between the guide section and the inner wall of the positioning groove is set to be larger than the fitting clearance between the main body section and the inner wall of the positioning groove, so that the length of the force arm is approximately the length of the main body section.

[0028] 4. As a preferred embodiment of the present application, the first annular surface of the tail section is matched with the matching inclined surface of the positioning groove to achieve the dual radial and axial limiting of the positioning shaft by the sleeve. In addition, the first annular surface is inclined so that there is a good transition between the main section and the tail section. When cleaning, water stains can easily slide from the main section along the first annular surface to the bottom of the grinding cup, improving the cleaning experience of consumers.

[0029] 5. As a preferred embodiment of the present application, the present application sets a second annular surface and the second annular surface extends from the bottom edge of the first annular surface toward the gasket to intersect the gasket vertically, so that the bottom surface of the tail section can be close to the gasket to prevent water stains from entering between the two.

[0030] 6. As a preferred embodiment of the present application, the height of the guide section with a small diameter is set lower than the height of the main body section to relatively lower the center of gravity of the positioning shaft and improve the fixing reliability of the positioning shaft. Specifically, H2 and H3 satisfy: 0.25≤H2 / H3≤0.75, so as to avoid that when the H2 / H3 ratio is lower than 0.25, the H2 value is too small, and it is difficult to set both an upwardly raised arc surface and a vertically extending side wall at the top of the guide section; on the other hand, when the H2 / H3 ratio is greater than 0.75, the height of the sleeve of the dough kneading knife and the positioning shaft limit fit is small, and the dough kneading knife is easily subjected to a large deflection force and slips out relative to the positioning shaft.

[0031] 7. As a preferred embodiment of the present application, the present application sets a plurality of upper steps with the step surface facing upward on the outer side of the sleeve, and sets a lower step in the inner cavity of the blade shaft of the crushing knife to cooperate with the plurality of upper steps, so that the sleeve is axially limited by the plurality of steps. When installing the sleeve, the axial limitation of the upper step by the lower step avoids the sleeve from being over-pressed and embedded in the inner cavity of the blade shaft, which causes the sleeve to be displaced in the axial direction. Furthermore, the plurality of upper steps are provided to include a first upper step located above half the height of the positioning shaft, and a second upper step located below half the height of the positioning shaft, so that the first upper step radially limits the upper portion of the positioning shaft, and the second upper step radially limits the lower portion of the positioning shaft, which has the effect of straightening the positioning shaft at multiple points, and improves the coaxiality between the positioning shaft and the blade shaft of the crushing knife.

[0032] 8. As a preferred embodiment of the present application, the present application sets a transition surface extending radially outward and downward between the guide section and the main body section, so that when the positioning shaft is cleaned, water droplets can easily slide off through the transition surface, which is more hygienic and clean. At the same time, the existence of the transition surface makes the connection strength between the bottom end of the guide section and the main body section better, and when subjected to a large deflection force, the guide section is not easy to deform or even break relative to the main body section.

[0033] 9. As a preferred embodiment of the present application, the present application reduces the contact area between the top surface of the guide section and the top surface of the positioning groove by setting an arc surface, thereby reducing the friction noise between the two. Specifically, the ratio of the outer diameter of the plane to the outer diameter of the guide section should be set between 0.1 and 0.5 to avoid the friction noise seriously affecting the user experience when the plane is too large, and to avoid the excessive force per unit area of ​​the plane when the plane is too small, which easily causes the top surface of the positioning groove to be worn and fail. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0035] Figure 1 It is a cross-sectional view of a food processor provided in one embodiment of the utility model when a meat grinder is installed;

[0036] Figure 2 It is a cross-sectional view of a food processor provided in one embodiment of the utility model when a dough knife is installed;

[0037] Figure 3 yes Figure 1 A local enlarged view of area a shown in FIG.

[0038] Figure 4 yes Figure 2 A local enlarged view of area b shown in FIG.

[0039] Figure 5 This is a schematic structural diagram of a positioning shaft in one embodiment of the utility model;

[0040] Figure 6 It is a schematic diagram of the principle of the positioning axis and the knife axis at the maximum deflection amount in one embodiment of the utility model.

[0041] Reference numerals:

[0042] 1-host; 11-motor;

[0043] 2-crushing cup; 21-meat grinder; 211-knife shaft; 2111-first lower step; 2112-second lower step; 212-blade; 22-dough knives; 23-cup cover;

[0044] 3-shaft sleeve; 31-first upper step; 32-second upper step;

[0045] 4-positioning shaft; 41-guide section; 411-transition surface; 412-arc surface; 4121-plane surface; 42-body section; 43-tail section; 431-first annular surface; 432-second annular surface;

[0046] 5- screws;

[0047] 6- Gasket. DETAILED DESCRIPTION

[0048] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0049] It should be noted that many specific details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific implementation methods disclosed below.

[0050] like Figures 1 to 6As shown, the present application provides a food processing machine, including a main machine 1 with a motor 11 therein and a crushing cup assembly, wherein the crushing cup assembly includes a crushing cup 2 and a crushing knife arranged in the crushing cup 2 and driven by the main machine 1. The open part of the crushing cup 2 is covered with the motor 11 in the present application, including a motor body and a two-stage reduction box, which can output two different speeds. Among them, the crushing knife includes a meat grinder 21 and a dough kneading knife 22 that can be used interchangeably with the meat grinder 21. The meat grinder 21 is adapted to a high-speed output end, and the dough kneading knife 22 is adapted to a low-speed output end, so that the food processing machine has at least two functions of mincing meat and kneading dough, meeting the needs of consumers for one machine with multiple uses. Specifically, a positioning shaft 4 is convexly provided on the inner bottom surface of the crushing cup 2, and the bottoms of the knife shafts 211 of the meat grinder 21 and the dough kneading knife 22 are respectively embedded with shaft sleeves 3, and the shaft sleeves 3 are provided with positioning grooves with openings facing downwards, and the positioning grooves are plugged and matched with the positioning shaft 4. That is to say, the meat grinder 21 and the dough kneading knife 22 can be respectively matched and installed with the positioning shaft 4 to realize the lower end positioning of the corresponding crushing knife. Usually, a cup cover 23 is also provided at the mouth of the crushing cup 2, and a through hole is provided in the center of the cup cover 23, so that the top of the knife shaft 211 of the meat grinder 21 and the dough kneading knife 22 can pass through and adapt to the output end of the motor 11, that is, the cup cover 23 realizes the upper end positioning of the corresponding crushing knife.

[0051] It should be noted that the material of the crushing cup 2 is not specifically limited in the present application, and it can be mainly a steel cup or a glass cup. It is understandable that in another embodiment, the motor may not be provided, that is, a rotatable handle is provided on the top of the cup cover, and one end of the handle connected to the cup cover is used for transmission connection with the top of the blade shaft of the crushing knife.

[0052] More specifically, in the present application, the fixing between the positioning shaft 4 and the pulverizing cup 2 is locked by screws 5, that is, the fastener is a screw 5. The bottom wall of the pulverizing cup 2 is provided with a hole for the screw 5 to extend into, and the positioning shaft 4 is provided with a positioning hole with an opening facing downward, and the positioning hole is used to cooperate with the fastener to lock the positioning shaft 4 to the bottom of the pulverizing cup 2, and a gasket 6 is clamped and installed between the bottom surface of the positioning shaft 4 and the inner bottom surface of the pulverizing cup 2. During installation, the screw 5 passes through the hole on the bottom wall of the pulverizing cup 2 from the outer surface of the bottom wall of the pulverizing cup 2 from bottom to top, passes through the installation hole of the gasket 6, and extends into the positioning hole to clamp and lock the positioning shaft 4, the gasket 6, and the bottom wall of the pulverizing cup 2, that is, the gasket 6 is clamped between the bottom surface of the positioning shaft 4 and the inner bottom surface of the pulverizing cup 2, so as to avoid direct contact between the bottom surface of the positioning shaft 4 and the inner bottom surface of the pulverizing cup 2, resulting in friction wear and friction noise.

[0053] Since the working state of the food processor when mincing meat is different from that when kneading dough, on the one hand, there is a difference in the materials, and on the other hand, the load on the dough is greater. During the research process of the present applicant, it was found that when the meat mincer 21 and the dough kneading knife 22 share the same positioning shaft 4, when the rated capacity of the grinding cup 2 itself is too large or exceeds the rated capacity, it is very easy for the gasket 6 and the bottom of the grinding cup 2 to be compressed and deformed, and the glass cup is easy to crack, while this situation has not yet occurred in the minced meat state. To this end, the present application provides a solution:

[0054] First, the height H of the blade shaft 211 and the height H1 of the radial fit between the positioning shaft 4 and the positioning groove satisfy: 0.15H-2≤H1, and H1≤30mm. Specifically, the height of the blade shaft 211 refers to the plumb bob height from the top to the bottom of the crushing blade, which can be referred to Figure 1 , 2 .

[0055] Since the important purpose of this application is to solve the problem in the prior art that the gasket 6 is easily crushed and the positioning shaft 4 becomes loose when the food processor is performing heavy load operations such as kneading dough. However, we do not want to lose sight of one thing while focusing on the other and bring other additional problems. Therefore, in this application, the H and H1 values ​​are also considered in association, and the H1 value is set to be less than 30mm to avoid the positioning shaft 4 being too long, which causes the positioning groove to become adaptively deeper and affects the consumer's cleaning experience.

[0056] At the same time, reference Figure 6 In the prior art, the maximum deflection of the positioning shaft 4 in the sleeve 3 is 0.3 mm, and the top of the positioning shaft 4 is provided with an upwardly raised arc surface 412, and half of the height of the arc surface 412 is about 2 mm. Therefore, when the portion below the arc surface 412 of the positioning shaft 4 is radially matched with the positioning groove, the total height of the positioning shaft 4 is (H1+2) mm. For the blade shaft 211, the design requirements in the industry generally require that the deflection of the top of the blade shaft 211 shall not be greater than 2 mm. Therefore, referring to Figure 6 , the schematic diagram of the blade shaft 211 tilting is shown in this application. The hypotenuse of the large triangle should be the actual length of the blade shaft 211 when the blade shaft is at the maximum deflection. However, since the height of the blade shaft 211 is often much greater than 2mm, the hypotenuse of the large triangle is almost equal to the vertical straight side. For example, when the actual height H of the blade shaft 211 is 151mm, (i.e. Figure 6 When the deflection is 2 mm, the height of the plumb bob at the top of the knife shaft 211 relative to the bottom is about 150.99 mm (i.e. Figure 6 Therefore, in the present application, the vertical side of the large triangle can be set to be equal to the actual height of the knife shaft 211 when it is vertically arranged.

[0057] Therefore, for specific calculations, in this application, the vertically extending straight side of the large triangle is used as the total height of the knife axis 211. According to the calculation principle of similar triangles, it is obtained that: 0.3 / 2 = (H1 + 2) / H, that is, H1 = 0.15H-2. However, since this is the most extreme critical value, in general, it is necessary to set the value of H1 to be larger so that the positioning axis 4 has a better straightening effect on the knife axis 211. Therefore, it is necessary to set 0.15H-2 ≤ H1.

[0058] Furthermore, under the premise of ensuring that the knife shaft 211 is easy to clean and has a good straightening effect, the height of the radial fit between the positioning shaft 4 and the positioning groove is set to H1, the lateral width of the bottom surface of the positioning shaft 4 in contact with the top surface of the gasket 6 is L1, the bottom surface outer diameter of the positioning shaft 4 is D1, the outer diameter of the sleeve 3 is D3, and a positioning hole with an opening facing downward is provided in the positioning shaft 4. The positioning hole is used to cooperate with a fastener to lock the positioning shaft 4 to the bottom of the crushing cup 2, and the diameter of the positioning hole is D2, wherein 0.18H1≤L1≤D1-D2, D1≤D3.

[0059] Specific analysis: Under the premise that the lateral width L1 of the bottom surface of the positioning shaft 4 in contact with the top surface of the gasket 6 remains unchanged, the longer the height H1 of the radial fit between the positioning shaft 4 and the positioning groove, the better the centering of the crushing knife and the positioning shaft 4, and the less likely the crushing knife will be deflected, but the more difficult it is to clean the positioning groove. Under the premise that the H1 value remains unchanged, the larger the lateral width L1 of the bottom surface of the positioning shaft 4 in contact with the top surface of the gasket 6, the smaller the vertical force per unit area of ​​the gasket 6, and the less likely the gasket 6 and the bottom of the crushing cup 2 are to be deformed by pressure or even cause the positioning shaft 4 to loosen, but the sleeve 3 needs to be increased in height to avoid the gasket 6 setting, causing the overall knife shaft 211 to move upward, affecting the lifting effect of the bottommost blade 212 on the bottom surface of the crushing cup 2. Therefore, the H1 and L1 values ​​are two interrelated parameters.

[0060] In order to explore the optimal relationship between H1 and L1 values, and the specific range of L1, so as to ensure that the knife shaft 211 of both will not slip relative to the positioning shaft 4 and the deflection is less than 2mm when the meat is minced and the dough is kneaded, and will not cause the gasket 6 to collapse and the positioning shaft 4 to loosen under the dough kneading state with a greater load, the applicant has conducted multiple groups of tests, and specifically analyzed one group of embodiments, and reference Table 1 shows whether the food processor has abnormal conditions under different H1 and L1 values ​​in the dough kneading state. Table 2 shows whether the food processor has abnormal conditions under different H1 and L1 values ​​in the meat minced state.

[0061] It should be noted that the test conditions of Table 1 are: the diameter of the positioning hole is 3.6 mm, the height of the positioning shaft 4 is 25 mm, the height H of the knife shaft 211 of the dough knife 22 is 151 mm, 600 grams of flour and 300 grams of water are added to make 900 grams of dough, and the bottom outer diameter of the sleeve 3 is 16 mm. The test conditions of Table 2 are: the diameter of the positioning hole is 3.6 mm, the height of the positioning shaft 4 is 25 mm, the height H of the knife shaft 211 of the meat grinder 21 is 151 mm, 900 grams of lean meat is processed, and the bottom outer diameter of the sleeve 3 is 16 mm. The crushing cup 2 is a glass cup to enhance the visual effect when the user observes the state of food crushing. That is to say, when the positioning shaft 4 extends radially outward to be flush with the bottom edge of the sleeve 3, the bottom outer diameter D3 of the sleeve 3 is equal to the bottom outer diameter D1 of the positioning shaft 4.

[0062] It should also be noted that the letters A, B, C, D, and E in Tables 1 and 2 mean:

[0063] A: The food processing machine is operating normally, the positioning shaft 4 is installed reliably, the knife shaft 211 is easy to clean, the material at the bottom of the crushing cup 2 is fully crushed, the top end deflection of the knife shaft 211 of the crushing knife is less than 2mm and does not slip relative to the positioning shaft 4.

[0064] B: The material at the bottom of the grinding cup 2 is fully crushed, that is, there is material remaining at the bottom of the grinding cup 2 that fails to participate in the crushing.

[0065] C: The positioning groove of the knife shaft 211 sleeve 3 is too deep and difficult to clean.

[0066] D: The gasket 6 is crushed and deformed, causing the positioning shaft 4 to loosen and even the crushing cup 2 to crack.

[0067] E: The top of the blade shaft 211 of the crushing blade swings more than 2 mm and slips relative to the positioning shaft 4.

[0068] Table 1: Whether the food processor has abnormal conditions under different H1 and L1 values ​​in the dough mixing state

[0069]

[0070] It can be seen from Table 1 that when H1 is between 20.65 mm and 30 mm, and L1 is between 4 mm and 16 mm (i.e., the outer diameter D1 of the bottom surface of the sleeve 3), the dough kneading state of the food processor can operate normally, the positioning shaft 4 is reliably installed, the knife shaft 211 is easy to clean, the material at the bottom of the crushing cup 2 is fully crushed, and the knife shaft 211 of the crushing knife is less than 2 mm and does not slip relative to the positioning shaft 4. After conversion, 0.15H-2=0.15*151-2=20.65 mm, when H1 is between 20.65 mm and 30 mm, the conditions of 0.15H-2≤H1 and H1≤30 mm are met, the positioning shaft 4 of the food processor is reliably installed, and the knife shaft 211 is easy to clean. After testing, the minimum value that can prevent the positioning shaft 4 from deflecting is 3.71mm, that is, L1=3.71 / 20.65=0.18; and the maximum L1 value is the outer diameter of the bottom surface of the sleeve 3, which is equal to 16mm minus the outer diameter of the positioning hole, 3.6mm, and the calculated L1 is 12.4mm. Therefore, L1 needs to satisfy: 0.18H1≤L1≤D1-D2, and D1=D3 in the case of the maximum limit. In general, D1 and D3 need to satisfy: D1≤D3.

[0071] Specifically, when the L1 value is lower than 0.18H1, the gasket 6 will inevitably be crushed and deformed, causing the positioning shaft 4 to loosen. There are three more specific situations: (1) When the H1 value is greater than 30mm, it exceeds the specified range, which is likely to cause the overall positioning shaft 4 to become longer in height. In this case, the positioning groove of the sleeve 3 needs to be adaptively deepened, making it difficult to clean the inside of the knife shaft 211 of the crushing knife; (2) When the H1 value is within the preferred range, only the gasket 6 will be crushed and deformed, causing the positioning shaft 4 to loosen; (3) When the H1 value is lower than 0.15H-2, when H1 is lower than (0.15*151-2=20.65mm), the overall height of the positioning shaft 4 becomes shorter, the straightening effect of the knife shaft 211 is deviated, and the top of the knife shaft 211 of the dough knife 22 swings more than 2mm, and the relative positioning shaft 4 slips. In this case, due to the large swing amount of the top of the knife shaft, it is difficult to position the cup cover and the knife shaft, and to align the main machine and the knife shaft.

[0072] When the L1 value is greater than D1-D2, there will inevitably be a situation B: that is, the material at the bottom of the crushing cup 2 fully participates in the crushing, that is, there is material residue at the bottom of the crushing cup 2 that does not participate in the crushing. More specifically, there are three situations: (1) When the H1 value is greater than 30mm, it is easy to cause the overall positioning shaft 4 to become longer, so the positioning groove of the sleeve 3 needs to be adaptively deepened, making it difficult to clean the inside of the knife shaft 211 of the crushing knife; (2) When the H1 value is within the preferred range, only situation B exists. (3) When the H1 value is lower than 0.15H-2, that is, when H1 is lower than (0.15*151-2=20.65mm), the overall height of the positioning shaft 4 becomes shorter, and the straightening effect of the knife shaft 211 is biased, and the top of the knife shaft 211 of the dough kneading knife 22 swings more than 2mm, and the relative positioning shaft 4 slips.

[0073] When the L1 value satisfies the conditions 0.18H1≤L1≤D1-D2, D1≤D3, but does not satisfy 0.15H-2≤H1, H1≤30mm, two situations will occur: (1) If the H1 value is lower than (0.15H-2) mm, the food processing machine will encounter situation E: the top swing of the blade shaft 211 of the crushing knife will be greater than 2mm, and the relative positioning shaft 4 will slip; (2) If the H1 value is higher than 30mm, situation C will occur: the positioning groove of the blade shaft 211 sleeve 3 is too deep and difficult to clean, and because H1 is too long, when L1 is small, situation D will still exist.

[0074] It should be noted that in the area marked with case A in Table 1, the color depth indicates: dark gray is a better preferred range, and light gray is a second preferred range.

[0075] Table 2: Whether the food processor has abnormal conditions under different H1 and L1 values ​​in the minced meat state

[0076]

[0077] It can be seen from Table 2 that when H1 is between 20.65mm and 23mm, and L1 is between 0.4mm and 16mm (i.e., the outer diameter D1 of the bottom surface of the sleeve 3), the dough kneading state of the food processor can operate normally, the positioning shaft 4 is reliably installed, the knife shaft 211 is easy to clean, the material at the bottom of the crushing cup 2 is fully crushed, and the knife shaft 211 of the crushing knife has a swing amount of less than 2mm and does not slip relative to the positioning shaft 4. However, when the H1 value is greater than 25mm and L1 is 0.4mm, due to the excessive vertical force on the gasket 6, the force on the gasket 6 per unit area exceeds the bearing range of the gasket 6, and the situation D still occurs. Similarly, when the H1 value is greater than 27mm and L1 is 0.7mm, the situation D also occurs.

[0078] It can also be concluded from Table 2 that when H1 is lower than (0.15H-2) mm, situation E exists regardless of how the L1 value changes; when L1 is greater than (D1-D2), situation B is added; when the L1 value is greater than (D1-D2), situation B exists regardless of how H1 changes, and when L1 is 20.65, situation E is added, or when H1 exceeds 30 mm, situation C is added; when the H1 value is greater than 30 mm, situation C will occur. Specifically, when H1 is 32 mm or above and L1 is less than or equal to 2 mm, situation D will occur, or when H1 is 3 mm and L1 is less than or equal to 0.7 mm, situation D will occur.

[0079] Therefore, by overlapping the A area ranges of Table 1 and Table 2, it is found that the range in which the food processing machine can operate in both the minced meat and dough mixing states should be: 0.15H-2≤H1, H1≤30mm, 0.18H1≤L1≤D1-D2, D1≤D3.

[0080] More specifically, regarding the selection of the minimum and maximum values ​​of the L1 value, the applicant makes the following explanation:

[0081] Regarding the minimum value limitation: During the research process, the applicant set the H1 value to 5mm (i.e., when the vertical lever arm is the smallest). At this height, if the L1 value is less than 3.71mm, although the positioning shaft 4 will not loosen, the lateral deflection of the knife shaft 211 is greater than 2mm due to the short positioning shaft 4, which can easily cause the top of the knife shaft 211 to get stuck relative to the output end of the host 1, or the bottom of the knife shaft 211 to get stuck relative to the positioning shaft 4, and the user's installation experience when aligning the host 1 with the knife shaft 211 is also poor. However, in order to solve the problem of the deflection of the knife shaft 211, we found that when the H1 value is above 22.65mm, the deflection of the knife shaft 211 meets the design requirements. Therefore, the applicant sets the L1 value to be greater than or equal to 0.18H1 to avoid the problem that when the L1 value is less than 0.18H1, the gasket 6 is crushed and deformed, causing the positioning shaft 4 to loosen, and / or the deflection of the top of the crushing knife shaft 211 is greater than 2mm, causing the shaft 211 to slip relative to the positioning shaft 4.

[0082] Regarding the limitation of the maximum value: it is considered that the bottom surface of the positioning shaft 4 must have the width of the positioning hole for the screw 5 to extend into to lock the positioning shaft 4, the gasket 6 and the bottom wall of the crushing cup 2. Therefore, the maximum value of L1 that can be set is the difference between the diameter of the bottom surface of the positioning shaft 4 and the diameter of the positioning hole, that is, L1 = D1-D2. As for where (D1-D2) can extend to, considering the turbulence problem at the bottom of the knife crushing cup 2, the bottom surface of the positioning shaft 4 set in this application can be extended to the maximum vertical flush with the outer diameter of the bottom surface of the sleeve 3, that is, when D1 = D3, the L1 value reaches the maximum. In this case, it is also beneficial to only lift the bottom of the sleeve 3 to allow the bottom of the positioning shaft 4 to radially bulge outward, and the overall height of the knife shaft 211 will not be too high. If the outer diameter D1 of the positioning shaft 4 is set to be greater than D3, then the bottom of the positioning shaft 4 must be radially convex outward. In order to avoid friction between the bottom of the cutter shaft 211 and the gasket 6, the bottom of the cutter shaft 211 needs to be too high, and the blade 212 at the bottom of the cutter shaft 211 also needs to be raised. Without changing the shape of the original blade 212, the gap between the blade 212 and the bottom of the crushing cup 2 is increased, which does not play a good role in lifting the material at the bottom of the crushing cup 2. It can be concluded that L1 should satisfy 0.18H1≤L1≤D1-D2, D1≤D3.

[0083] In summary, the solution of the present application, by limiting the H value, the L1 value and the relationship between H1, and the L1 value and the relationship between D1, D2, and D3, achieves the goal of not affecting the material effect at the bottom of the crushing cup 2, not making the inside of the knife shaft 211 difficult to clean, and not making the crushing knife shaft 211 easy to slip relative to the positioning shaft 4, and not causing the gasket 6 to be compressed and deformed, causing the positioning shaft 4 to loosen, and even when the crushing cup 2 is a glass cup, there is a risk of the glass cup cracking.

[0084] It should also be noted that, in general, reference Figure 3 , 4 , a positioning column extending downward is provided at the bottom of the positioning shaft 4, and the gasket 6 is sleeved on the outside of the positioning column. In this case, the value of L1 requires the outer diameter D1 of the positioning shaft 4 minus the diameter D2 of the positioning hole, minus twice the wall thickness of the positioning column, and minus the fitting clearance between the outer wall of the positioning column and the fitting hole of the gasket 6. Therefore, in this case, L1 will be smaller than (D1-D2). Of course, the gasket 6 can also be adhered or welded to the inner bottom surface of the grinding cup 2. In this case, the gasket 6 can only retain one hole for the screw 5 to pass through, so that L1 will be equal to (D1-D2). If the positioning shaft 4 also extends radially to be flush with the outer wall of the sleeve 3, then there is a limit maximum value of L1=D1-D2=D3-D2.

[0085] It can be understood that in another embodiment of the present application, the motor 11 includes a motor body and a first-stage reduction gearbox, and only one output terminal is provided. This embodiment does not specifically limit whether it is a two-speed output controlled by the motor or a single-speed output. There is only one crushing knife in this embodiment, that is, the crushing knife has to realize both the meat mincing function and the dough kneading function. Compared with the aforementioned embodiment with a dough kneading knife and a meat mincer, this embodiment has lower cost because only one crushing knife is needed and the reduction gearbox is a reduction gearbox. However, since the dough kneading function with a large load still needs to be realized, it is still necessary to limit 0.15H-2≤H1, H1≤30mm, 0.18H1≤L1≤D1-D2, D1≤D3 to ensure that the positioning shaft does not loosen when kneading the dough.

[0086] Further, in a preferred embodiment of the present application, reference is made to Figure 3 , 4 The positioning shaft 4 includes a main body section 42 extending into the positioning groove and radially limited with the inner side wall of the positioning groove, and a tail section 43 arranged below the main body section 42 and radially expanded. The bottom surface of the tail section 43 is set lower than the bottom surface of the sleeve 3, and the gasket 6 is clamped between the bottom surface of the tail section 43 and the inner bottom surface of the crushing cup 2. By setting the main body section 42 to radially cooperate with the inner side wall of the positioning groove, when the cutter shaft 211 is subjected to the deflection force, the main body section 42 can provide a force in the opposite direction of the deflection force to straighten the cutter shaft 211. The radially expanded tail section 43 is used to increase the contact width L1 between the bottom surface of the positioning shaft 4 and the top surface of the gasket 6, thereby reducing the risk of crushing the gasket 6 and the bottom of the crushing cup 2. At the same time, in order not to cause other additional problems, the bottom surface of the tail section 43 is set lower than the bottom surface of the sleeve 3 to avoid direct contact between the gasket 6 and the sleeve 3 when the outer diameter of the gasket 6 is larger than the outer diameter of the tail section 43, thereby avoiding the problem of wear.

[0087] Based on the fact that the positioning shaft 4 includes a body section 42 and a tail section 43, the present application provides the following embodiments:

[0088] Embodiment 1:

[0089] The main body section 42 of the positioning shaft 4 is straight-cylindrical, and only an upwardly raised arc surface 412 is provided on the top surface of the main body section 42, so the height of H1 is equal to the side wall of the main body section 42 plus the height of the tail section 43 and the positioning groove. In this way, the structure of the corresponding positioning groove is also straight-cylindrical, and the positioning grooves of the meat grinder 21 and the dough kneading knife 22 have the same shape.

[0090] Embodiment 2:

[0091] refer to Figure 5, the positioning shaft 4 is provided with a guide section 41 which is radially smaller than the main section 42, that is, the positioning shaft 4 is three-sectioned. Specifically, there is a clear distinction between the installation of the positioning shaft 4 and the positioning groove, refer to Figure 3 , 4 : When the crushing knife is a meat grinder 21, the guide segment 41 and the body segment 42 are both radially limited with the inner side wall of the positioning groove; when the crushing knife is a dough kneading knife 22, the matching clearance between the guide segment 41 and the inner side wall of the positioning groove is greater than the matching clearance between the body segment 42 and the inner side wall of the positioning groove, wherein, with reference to Figure 5 , the H1 value is equal to the height H2 value of the main body section 42.

[0092] In this solution, the knife shafts 211 of the meat grinder 21 and the dough kneading knife 22 are respectively set to different shapes, so that one positioning shaft 4 can be adapted to different crushing knives. Under different functional states, there will be no serious deflection of the knife shaft 211, loosening of the positioning shaft 4, and crushing of the gasket 6 and the bottom wall of the crushing cup 2.

[0093] Specific analysis: When the pulverizing knife is a meat grinder 21, the guide section 41 and the main body section 42 are set to cooperate with the radial limit of the inner wall of the positioning groove to increase the matching height H1 between the inner wall of the positioning groove and the positioning shaft 4, so that the positioning shaft 4 has a good straightening effect on the meat grinder 21, ensuring the coaxiality of the positioning shaft 4 and the knife shaft 211, and reducing working noise. At the same time, because the meat is soft and not easy to form a ball when it is minced, the load on the meat grinder 21 is much smaller than that on the dough knife 22. At this time, the guide section 41 and the main body section 42 are set to cooperate with the radial limit of the inner wall of the positioning groove. Although the force arm is increased, due to the small load, it is still difficult to have the risk of the positioning shaft 4 loosening and the gasket 6 and the bottom wall of the pulverizing cup 2 being crushed.

[0094] When the crushing knife is a dough kneading knife 22, due to the large load, it is necessary to reduce the vertical force arm to reduce the risk of the positioning shaft 4 loosening and the gasket 6 and the bottom wall of the crushing cup 2 being crushed. Specifically, the fitting clearance between the guide section 41 and the inner wall of the positioning groove is set to be larger than the fitting clearance between the main body section 42 and the inner wall of the positioning groove, so that the length of the force arm is approximately the length of the main body section 42.

[0095] Embodiment three:

[0096] The difference between this embodiment and the second embodiment is that the shaft sleeve 3 of the meat grinder 21 is made consistent with the shaft sleeve 3 of the dough kneading knife 22, and the shaft sleeve 3 of the dough kneading knife 22 is consistent with that in the second embodiment. Since the load on the meat grinder itself is relatively small, even if the H1 value is kept the same as that of the dough kneading knife 22, the meat grinder 21 will not have a large deflection. Then, from the perspective of cost and installation, developing the same shaft sleeve 3 can reduce the cost of casting, and for assemblers, shaft sleeves 3 of the same shape are easier to install, which can speed up assembly efficiency.

[0097] It is understandable that as long as 0.15H-2≤H1, H1≤30mm, 0.18H1≤L1≤D1-D2, D1≤D3 are satisfied, the shape of the positioning shaft 4 of the present application is not limited to the first to third embodiments. The positioning shaft 4 can be extended vertically upward from the extension of the tail section 43, that is, the whole is formed into a straight cylinder, which can also avoid the situation where the positioning shaft 4 is loose. Moreover, the positioning shaft 4 is thickened as a whole, which has better straightening strength for the knife shaft 211.

[0098] In a preferred embodiment of the present application, the shape of the tail section 43 of the positioning shaft 4 is further considered. Specifically, refer to Figure 5 The outer surface of the tail section 43 includes a first annular surface 431 that is radially outwardly inclined and downwardly arranged, and the inner surface of the positioning groove is provided with a matching inclined surface that is limitedly matched with the first annular surface 431.

[0099] The first annular surface 431 of the tail section 43 is matched with the matching inclined surface of the positioning groove to realize the double limiting of the radial and axial limiting of the positioning shaft 4 by the sleeve 3. In addition, the first annular surface 431 is inclined, so that there is a good transition between the main section 42 and the tail section 43. When cleaning, water stains can easily slide from the main section 42 along the first annular surface 431 to the bottom of the grinding cup 2, thereby improving the cleaning experience of consumers.

[0100] Furthermore, a second annular surface 432 is provided and extends from the bottom edge of the first annular surface 431 toward the gasket 6 until it intersects the gasket 6 vertically, so that the bottom surface of the tail section 43 can be close to the gasket 6 to prevent water stains from entering between the two.

[0101] In a preferred embodiment, reference is made to Figure 5, the applicant also sets the positioning shaft 4 to include a guide section 41 located at the top, and a body section 42 located below the guide section 41 and radially expanded. The applicant sets the height of the guide section 41 with a small diameter to be lower than the height of the body section 42, so as to relatively lower the center of gravity of the positioning shaft 4 and improve the fixing reliability of the positioning shaft 4. Specifically, the height of the guide section 41 is H2, and the height of the body section 42 is H3, wherein H2 and H3 satisfy: 0.25≤H2 / H3≤0.75. On the one hand, it avoids that when the H2 / H3 ratio is lower than 0.25, the H2 value is too small, and it is difficult to set both the upwardly raised arc surface 412 and the vertically extended side wall at the top of the guide section 41; on the other hand, it avoids that when the H2 / H3 ratio is greater than 0.75, the height of the sleeve 3 of the dough kneading knife 22 and the positioning shaft 4 is small, and the dough kneading knife 22 is easily subjected to a large deflection force and slips out relative to the positioning shaft 4.

[0102] For further reference, Figure 5 The bottom end of the guide section 41 is connected to the top end of the body section 42 via a transition surface 411, and the transition surface 411 extends radially outward and downward. By providing a transition surface 411 extending radially outward and downward between the guide section 41 and the body section 42, water droplets can easily slide off through the transition surface 411 when the positioning shaft 4 is cleaned, making it more sanitary and clean. At the same time, the existence of the transition surface 411 makes the connection strength between the bottom end of the guide section 41 and the body section 42 better, and when subjected to a large deflection force, the guide section 41 is not easy to deform or even break relative to the body section 42.

[0103] It should be noted that, when an inclined transition surface 411 is provided between the guide segment 41 and the main body segment 42 , the transition surface 411 belongs neither to the guide segment 41 nor to the main body segment 42 .

[0104] In some preferred embodiments of the present application, reference is made to Figure 5 The positioning shaft 4 also includes a guide section 41 at the top, and the top of the guide section 41 is an upwardly raised arc surface 412. The arc surface 412 is provided to reduce the contact area between the top surface of the guide section 41 and the top surface of the positioning groove, thereby reducing the friction noise between the two. Specifically, the ratio of the outer diameter of the plane 4121 to the outer diameter of the guide section 41 is set between 0.1 and 0.5 to avoid the friction noise seriously affecting the user experience when the plane 4121 is too large, and to avoid the excessive force per unit area of ​​the plane 4121 when the plane 4121 is too small, which easily causes the top surface of the positioning groove to be worn and fail.

[0105] In some embodiments of the present application, when two crushing knives are provided, one is a meat grinder and the other is a dough knives. Figure 1 , 3The outer side surface of the sleeve 3 of the meat grinder 21 is provided with multiple upper steps with the step surface facing upward, and the inner cavity of the blade shaft 211 of the meat grinder 21 is provided with lower steps that cooperate with the multiple upper step limits, so that the sleeve 3 is axially limited by multiple levels. When installing the sleeve 3, the axial limitation of the upper step by the lower step can avoid over-pressure of the sleeve 3 and excessive embedding in the inner cavity of the blade shaft 211, that is, when the bottom surface of the sleeve 3 is higher than the bottom surface of the blade shaft 211, the sleeve 3 is axially displaced. In this case, there is no specific limitation on the shape of the blade shaft 211 of the dough kneading knife 22. For example, it can be Figure 4 In the case of, that is, the outer surface of the sleeve 3 is only provided with an upper step, and a lower step is provided in the inner cavity of the cutter shaft 211 to limit the upper step. Of course, if the crushing knife adopts a dough knife, the structure of the axial limit of the lower step to the upper step can also be adopted.

[0106] Furthermore, multiple steps are provided including a first step 31 and a second step 32, wherein the first step 31 is located above half the height of the positioning shaft 4, and the second step 32 is located below half the height of the positioning shaft 4. The first step 31 limits the upper radial position of the positioning shaft 4, and the second step 32 limits the lower radial position of the positioning shaft 4, which has the effect of correcting the positioning shaft 4 at multiple points, thereby improving the coaxiality between the positioning shaft 4 and the knife shaft 211 of the meat grinder 21.

[0107] The technical solution protected by the present utility model is not limited to the above-mentioned embodiments. It should be pointed out that the combination of the technical solution of any embodiment with the technical solution of one or more other embodiments is within the protection scope of the present utility model. Although the present utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to it based on the present utility model. Therefore, these modifications or improvements made without departing from the spirit of the present utility model are within the scope of protection claimed by the present utility model.

Claims

1. A grinding cup assembly of a food processor, comprising a grinding cup and a grinding knife arranged in the grinding cup, the grinding knife can be used for kneading dough, the inner bottom surface of the grinding cup is convexly provided with a positioning shaft, the bottom of the blade shaft of the grinding knife is embedded with a shaft sleeve, the shaft sleeve is provided with a positioning groove with an opening facing downward, the positioning groove is plug-fitted with the positioning shaft, a gasket is clamped and installed between the bottom surface of the positioning shaft and the inner bottom surface of the grinding cup, characterized in that: The height of the knife shaft is H, the height of the radial matching between the positioning shaft and the positioning groove is H1, the lateral width of the bottom surface of the positioning shaft in contact with the top surface of the gasket is L1, the bottom surface outer diameter of the positioning shaft is D1, the bottom surface outer diameter of the sleeve is D3, and a positioning hole with an opening facing downward is provided in the positioning shaft. The positioning hole is used to cooperate with a fastener to lock the positioning shaft to the bottom of the grinding cup, and the diameter of the positioning hole is D2, wherein 0.15H-2≤H1, H1≤30mm, 0.18H1≤L1≤D1-D2, D1≤D3.

2. The grinding cup assembly of a food processor according to claim 1, characterized in that: The positioning shaft includes a main body section extending into the positioning groove and radially limiting with the inner side wall of the positioning groove, and a tail section arranged below the main body section and radially expanding, the bottom surface of the tail section is arranged lower than the bottom surface of the shaft sleeve, and a gasket is clamped between the bottom surface of the tail section and the inner bottom surface of the crushing cup.

3. The grinding cup assembly of a food processor according to claim 2, characterized in that: The crushing knife includes a meat grinder and a dough kneading knife that can be used interchangeably with the meat grinder. A guide section that is radially reduced relative to the main body section is also provided above the positioning shaft. When the crushing knife is a meat grinder, the guide section and the main body section are both radially limited with the inner side wall of the positioning groove. When the crushing knife is a dough kneading knife, the fitting clearance between the guide section and the inner side wall of the positioning groove is greater than the fitting clearance between the main body section and the inner side wall of the positioning groove.

4. The grinding cup assembly of a food processor according to claim 2, characterized in that: The outer surface of the tail section includes a first annular surface arranged to be inclined radially outward and downward, and the inner surface of the positioning groove is provided with a matching inclined surface that is limitedly matched with the first annular surface.

5. The grinding cup assembly of a food processor according to claim 3, characterized in that: The tail section also includes a second annular surface arranged below the first annular surface, the second annular surface extends from the bottom edge of the first annular surface toward the gasket to intersect the gasket perpendicularly, and the outer diameter of the gasket is not less than the outer diameter of the second annular surface.

6. The grinding cup assembly of a food processor according to claim 1, characterized in that: The positioning shaft includes a guide section located at the top, and a body section located below the guide section and radially expanded, the height of the guide section is H2, the height of the body section is H3, wherein H2 and H3 satisfy: 0.25≤H2 / H3≤0.

75.

7. The grinding cup assembly of a food processor according to claim 1, characterized in that: The outer side surface of the shaft sleeve of the crushing knife is provided with a plurality of upper steps with the step surface facing upward, and the inner cavity of the knife shaft of the crushing knife is provided with a lower step which is limitedly matched with the plurality of upper steps.

8. The grinding cup assembly of a food processor according to claim 7, characterized in that: The multiple upper steps include a first upper step and a second upper step, wherein the first upper step is located above half the height of the positioning shaft, and the second upper step is located below half the height of the positioning shaft.

9. The grinding cup assembly of a food processor according to claim 1, characterized in that: The positioning shaft comprises a guide section at the top, and a body section arranged below the guide section and radially expanding, the bottom end of the guide section is connected to the top end of the body section via a transition surface, and the transition surface extends radially outward and downward; or, The positioning shaft also includes a guide section at the top, the top of the guide section is an upwardly raised arc surface, the center of the arc surface is provided with a plane abutting against the top surface of the positioning groove, and the ratio of the outer diameter of the plane to the outer diameter of the guide section is between 0.1 and 0.

5.

10. A food processing machine, comprising a main machine with a motor installed therein, and a cup cover arranged at the mouth of a grinding cup, characterized in that: The food processor further comprises a grinding cup assembly as claimed in any one of claims 1 to 9, wherein the motor is used to drive the grinding blade to rotate.

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