Stirring knife structure and food processor comprising same

Abstract

The utility model discloses a stirring knife structure and a food processor comprising the same. The stirring blade structure comprises a driving shaft; the connecting sleeve comprises a sleeving section and a pressing rivet section which are connected, a shaft hole is formed in the sleeving section, and the driving shaft is sleeved with the sleeving section through the shaft hole; the shaft hole partially penetrates into the pressing rivet section, an operation hole is formed in the pressing rivet section and communicated with the shaft hole, the diameter of the operation hole is larger than that of the shaft hole, on the plane perpendicular to the axis of the shaft hole, the projection of the shaft hole is located in the projection of the operation hole, and a connecting groove is formed in the outer side wall of the pressing rivet section. The blade is arranged in the connecting groove, and when the inner side wall of the operation hole is squeezed, the outer side wall of the pressing rivet section is bent and deformed so that the blade can be fixed to the connecting groove. Thus, the outer side wall of the pressing rivet section is bent and deformed by extruding the inner side wall of the operation hole, the blade is fixed, meanwhile, it is guaranteed that the size of the shaft hole is not affected, and the assembling precision of the connecting sleeve and the driving shaft is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to kitchen home appliance technical field especially, it is stirring knife structure and including its food processing machine. BACKGROUND

[0002] In the food processing machine, the stirring knife structure is the key stirring component, and the stirring knife structure is usually composed of a driving shaft, a connecting sleeve and a blade. The connecting sleeve is sleeved on the driving shaft through a shaft hole, and the blade is fixed on the connecting sleeve through a rivet pressing mode. Specifically, the outer side wall of the connecting sleeve is provided with a connecting groove, and the blade is arranged on the connecting groove. During the rivet pressing operation, a rivet pressing die needs to be inserted into the shaft hole to extrude the inner side wall of the shaft hole, so that the outer side wall of the connecting sleeve is bent and deformed to fix the blade in the connecting groove. However, this will cause the size of the shaft hole to change, thereby affecting the assembly accuracy of the connecting sleeve and the driving shaft, and reducing the overall performance and service life of the food processing machine. SUMMARY

[0003] In order to overcome at least one of the defects of the prior art, the utility model provides a stirring knife structure and a food processing machine comprising the same, which aims to improve the design of the connecting sleeve to achieve stable fixation of the blade while ensuring that the size of the shaft hole is not affected and improving the assembly accuracy of the connecting sleeve and the driving shaft.

[0004] The utility model adopts the technical scheme that:

[0005] The stirring knife structure comprises a driving shaft, a connecting sleeve and a blade. The connecting sleeve comprises a sleeve joint segment and a rivet pressing segment which are connected. The sleeve joint segment is provided with a shaft hole. The sleeve joint segment is sleeved on the driving shaft through the shaft hole. The shaft hole partially penetrates into the rivet pressing segment. The rivet pressing segment is provided with an operation hole which communicates with the shaft hole. The diameter of the operation hole is greater than that of the shaft hole. The projection of the shaft hole on a plane perpendicular to the axis of the shaft hole is located within the projection of the operation hole. The outer side wall of the rivet pressing segment is provided with a connecting groove. The blade is arranged in the connecting groove. When the inner side wall of the operation hole is extruded, the outer side wall of the rivet pressing segment will be bent and deformed to fix the blade in the connecting groove.

[0006] According to some embodiments of the utility model, the axial depth of the operation hole is defined as L, and L satisfies: 1.5mm≤L≤3.5mm.

[0007] According to some embodiments of the utility model, a transversely extending step surface is formed at the intersection of the shaft hole and the operation hole. The driving shaft is provided with a limiting ring which abuts against the step surface.

[0008] According to some embodiments of the utility model, the outer side wall of the driving shaft is provided with a fixed groove, and the limiting ring is arranged in the fixed groove.

[0009] According to some embodiments of the utility model, the limiting ring is elastic.

[0010] According to some embodiments of the utility model, when not being pressed, the section of the connecting groove in the axial direction of the driving shaft is L-shaped, and the inner side wall of the operation hole will be pressed to make the groove wall of the connecting groove bend and deform in the vertical direction to fix the blade in the connecting groove.

[0011] According to some embodiments of the utility model, the riveting section is connected to the lower end of the sleeve joint section, and the operation hole is located below the shaft hole.

[0012] According to some embodiments of the utility model, the driving shaft is provided with a driving rib, the inner side wall of the sleeve joint section is provided with a guide rib, and the driving rib and the guide rib are clamped to connect the driving shaft and the sleeve joint section.

[0013] According to some embodiments of the utility model, the shaft hole and the operation hole are coaxially arranged.

[0014] In addition, the utility model also provides a food processor, which comprises the stirring blade structure as described above.

[0015] In summary, the stirring blade structure and the food processor comprising the same provided by the utility model have at least the following technical effects:

[0016] The riveting fixing mode makes the connection between the blade and the connecting sleeve more firm, enhances the overall stability of the stirring blade structure, and more importantly, the inner side wall of the operation hole is pressed by the riveting die to make the outer side wall of the riveting section bend and deform, realizing the fixation of the blade, while ensuring that the size of the shaft hole is not affected, and improving the assembly precision of the connecting sleeve and the driving shaft. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a three-dimensional structure schematic view of the stirring blade structure of the utility model embodiment;

[0018] Figure 2 It is an explosion structure schematic view of the stirring blade structure (without showing the limiting ring) of the utility model embodiment;

[0019] Figure 3 It is a cross-section structure schematic view of the stirring blade structure of the utility model embodiment;

[0020] Figure 4 It is a cross-section structure schematic view of the connecting sleeve of the utility model embodiment before riveting operation;

[0021] Figure 5 Figure 1 is a cross-sectional structure schematic diagram of the blade and the connecting sleeve in the process of the press riveting operation according to an embodiment of the present application;

[0022] Figure 6 Figure 2 is a partial enlarged view of the middle A part of the connecting sleeve according to the embodiment of the present application; Figure 5

[0023] Figure 7 Figure 3 is a three-dimensional structure schematic diagram of the driving shaft according to the embodiment of the present application.

[0024] In the drawings, the following notations are used:

[0025] 1, driving shaft; 11, driving rib; 12, fixed groove; 2, connecting sleeve; 21, sleeve joint section; 211, shaft hole; 212, guide rib; 2121, driving side surface; 2122, guide inclined surface; 22, press riveting section; 221, operation hole; 222, connecting groove; 23, step surface; 3, blade; 4, limiting ring; 5, cutter head; 6, press riveting die. DETAILED DESCRIPTION

[0026] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application.

[0027] In the description of the present application, it should be noted that the directions or position relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are the directions or position relationships based on the directions or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular direction, be constructed and operated in a particular direction, and therefore cannot be understood as a limitation on the present application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is only for the purpose of describing specific embodiments of the present application and is not intended to limit the present application.

[0029] The present application will be described in further detail below in combination with the drawings.

[0030] Please refer to Figures 1 to 7 ​This embodiment discloses a stirring blade structure, including a drive shaft 1, a connecting sleeve 2, and a blade 3. The connecting sleeve 2 includes a connected sleeve section 21 and a pressing section 22. The sleeve section 21 has a shaft hole 211, and the sleeve section 21 is sleeved on the drive shaft 1 through the shaft hole 211. The shaft hole 211 extends into the pressing section 22, and the pressing section 22 has an operating hole 221, which communicates with the shaft hole 211. The diameter of the operating hole 221 is larger than the diameter of the shaft hole 211. On a plane perpendicular to the axis of the shaft hole 211, the projection of the shaft hole 211 is located within the projection of the operating hole 221. The outer wall of the pressing section 22 has a connecting groove 222. The blade 3 is disposed in the connecting groove 222. When the inner wall of the operating hole 221 is compressed, the outer wall of the pressing section 22 bends and deforms to fix the blade 3 in the connecting groove 222.

[0031] The stirring blade structure provided in this embodiment uses a riveting fixing method to make the connection between the blade 3 and the connecting sleeve 2 more secure, thereby enhancing the overall stability of the stirring blade structure. More importantly, the riveting die 6 is used to press the inner wall of the operating hole 221 to cause the outer wall of the riveting section 22 to bend and deform, thereby fixing the blade 3. At the same time, it can ensure that the size of the shaft hole 211 is not affected, thus improving the assembly accuracy of the connecting sleeve 2 and the drive shaft 1.

[0032] like Figure 4 As shown, specifically in this embodiment, the axial depth of the operating hole 221 is defined as L. Preferably, L satisfies: 1.5mm ≤ L ≤ 3.5mm. Thus, on the one hand, when L is not less than 1.5mm, it ensures that the operating hole 221 has sufficient space for the riveting tool to operate, which is beneficial for the smooth progress of the riveting process and the achievement of the riveting effect. This depth setting can effectively avoid the problem of insufficient riveting or riveting failure caused by excessively small dimensions. On the other hand, limiting L to within 3.5mm avoids the structural weakening problem that may be caused by excessively large axial depth of the operating hole 221. Excessive depth may weaken the strength of the surrounding material, affecting the stability and durability of the overall structure. Therefore, this setting ensures that the overall strength of the product is not affected while guaranteeing the riveting effect. Furthermore, accurately setting the range of L also helps to improve the efficiency of the production process and cost control. By standardizing the axial depth of the operating hole 221, the production process can be simplified, reducing rework and material waste caused by size discrepancies, thereby improving overall production efficiency and economic benefits.

[0033] like Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, specifically, in the present embodiment, a transversely extending step face 23 is formed at the intersection of the shaft hole 211 and the operation hole 221; preferably, the driving shaft 1 is provided with a limiting ring 4, which abuts against the step face 23; it can be understood that, due to the existence of the operation hole 221, the step face 23 will not change in size during the riveting process. In this way, on the one hand, the design of the step face 23 not only enhances the structural strength of the connecting sleeve 2 in this area, but also provides a stable support surface for the limiting ring 4, which abuts against the step face 23, effectively preventing the axial movement of the connecting sleeve 2 on the driving shaft 1, thereby greatly improving the overall stability of the stirring knife structure; on the other hand, the cooperation of the limiting ring 4 and the step face 23 achieves precise positioning between the connecting sleeve 2 and the driving shaft 1, which simplifies the assembly process, reduces assembly errors, and ensures high-precision assembly of the stirring knife structure

[0034] As shown in Figure 2 , Figure 3 and Figure 7 , preferably, in the present embodiment, the outer side wall of the driving shaft 1 is provided with a fixing groove 12, and the limiting ring 4 is arranged in the fixing groove 12. In this way, on the one hand, the limiting ring 4 is embedded in the fixing groove 12 of the driving shaft 1, forming a more compact and stable connection. This design not only increases the axial positioning accuracy of the connecting sleeve 2, but also effectively prevents the movement or falling off of the limiting ring 4 during work, thereby greatly enhancing the overall stability of the stirring knife structure; on the other hand, the cooperation of the fixing groove 12 and the limiting ring 4 helps to more evenly distribute stress during work, which reduces stress concentration and reduces the risk of fatigue damage of components due to long-term stress, prolonging the service life of the stirring knife structure; on the other hand, the limiting ring 4 is directly embedded in the fixing groove 12, without the need for additional fixing parts or tools, simplifying the assembly steps, which not only improves production efficiency, but also reduces quality problems caused by improper assembly; on the other hand, the design of the fixing groove 12 allows the limiting ring 4 to be compactly installed on the driving shaft 1, optimizing the space layout, which helps to meet the requirements of strength and stability while maintaining the compactness of the stirring knife structure; on the other hand, when it is necessary to maintain or replace the components in the stirring knife structure, the cooperation of the limiting ring 4 and the fixing groove 12 makes the disassembly process more convenient, and the operator can easily identify and separate these components, reducing maintenance costs and time.

[0035] Preferably, in the present embodiment, the limiting ring 4 is elastic. In this way, firstly, the elastic limiting ring 4 can better adapt to the slight gap between the drive shaft 1 and the connecting sleeve 2, providing a tighter fit, which can more easily adapt to the dimensional variations of the drive shaft 1 and the connecting sleeve 2 during assembly, reducing assembly difficulty and time; secondly, during operation, the stirring blade structure will be affected by various forces and vibrations, the elastic limiting ring 4 can absorb part of the vibration energy, reducing the direct impact between components, thereby reducing noise and vibration, improving the smoothness and comfort of the equipment operation; thirdly, the elastic limiting ring 4 can better withstand stress and fatigue during operation, reducing deformation or damage caused by long-term stress, which prolongs the service life of the stirring blade structure, improves its reliability and durability.

[0036] As shown in Figure 4 , preferably, in the present embodiment, the cross-section of the connecting groove 222 in the axial direction of the drive shaft 1 is L-shaped when not under pressure, and the inner side wall of the operating hole 221 will bend and deform in the vertical direction when pressed to fix the blade 3 in the connecting groove 222. In this way, the L-shaped cross-section of the connecting groove 222 provides more stable support for the blade 3, and when the inner side wall of the operating hole 221 is pressed, the vertical groove wall of the connecting groove 222 will bend and deform, which not only firmly fixes the blade 3 in the connecting groove 222, but also increases the contact area between the blade 3 and the connecting sleeve 2, thereby improving the stability and reliability of the fixation, and because the L-shaped cross-section of the connecting groove 222 has enough space in the vertical direction for the operation of the rivet pressing tool, the rivet pressing process is simplified, the operator can more easily control the rivet pressing force and position, thereby improving production efficiency and product quality.

[0037] As shown in Figure 3 and Figure 4 , preferably, in the present embodiment, the rivet pressing section 22 is connected to the lower end of the sleeve connecting section 21, and the operating hole 221 is located below the shaft hole 211. In this way, placing the rivet pressing section 22 at the lower end of the sleeve connecting section 21 allows the rivet pressing tool to be more easily accessed and operated from below, which helps to reduce the need for operating space, especially in space-limited installation environments, while allowing more direct and effective pressure transmission, ensuring the stability and reliability of the rivet pressing process.

[0038] As shown in Figure 2 , Figure 3 and Figure 7As shown, preferably, in the present embodiment, the driving shaft 1 is provided with a driving rib 11, and the inner side wall of the sleeve segment 21 is provided with a guiding rib 212, the driving rib 11 and the guiding rib 212 are clamped to connect the driving shaft 1 and the sleeve segment 21. In this way, on the one hand, the clamping design of the driving rib 11 and the guiding rib 212 provides a firm connection between the driving shaft 1 and the sleeve segment 21, and this clamping structure can resist the centrifugal force in the rotation process, ensuring that the stirring knife structure remains stable during high-speed rotation and is not easy to loosen or fall off; on the other hand, the design of the guiding rib 212 provides a clear guiding effect for the assembly of the driving shaft 1, and during assembly, the driving rib 11 can smoothly slide along the guiding rib 212 until the correct assembly position is reached, which helps to reduce assembly errors and improve the overall precision of the stirring knife structure; on the other hand, the clamping design of the driving rib 11 and the guiding rib 212 makes the assembly process more convenient and fast, and the operator can complete the connection of the driving shaft 1 and the sleeve segment 21 without using additional fasteners or tools, thereby reducing assembly cost and time; on the other hand, the addition of the driving rib 11 and the guiding rib 212 not only improves the stability of the connection, but also enhances the structural strength of the sleeve segment 21 and the driving shaft 1, and this design helps to resist vibration and impact during work, prolonging the service life of the stirring knife structure.

[0039] As shown in the figure, Figure 4 As shown, preferably, in the present embodiment, the guiding rib 212 includes a driving side surface 2121 and a guiding inclined surface 2122, the transmission rib and the driving side surface 2121 are clamped, and the guiding inclined surface 2122 is located below the driving side surface 2121 and is inclined to the horizontal direction; the guiding inclined surface 2122 is used for sliding fit with the transmission rib, and the guiding inclined surface 2122 is used for guiding the transmission rib to move to a position in contact with the driving side surface 2121. In this way, when the transmission rib contacts the guiding rib 212, it will first contact the guiding inclined surface 2122, and by rotating the mounting sleeve, due to the inclined design of the guiding inclined surface 2122, the transmission rib will slide relative to the guiding inclined surface 2122 and gradually rise relative to the guiding inclined surface 2122 until it contacts the driving side surface 2121, and then the mounting sleeve is rotated to clamp the transmission rib and the driving side surface 2121 to connect the driving rod and the mounting sleeve, thereby improving the stability of the cooperation between the guiding rib 212 and the transmission rib.

[0040] Preferably, in the embodiment, the shaft hole 211 and the operation hole 221 are coaxially arranged. In this way, on the one hand, the coaxial arrangement of the shaft hole 211 and the operation hole 221 makes the structure of the connecting sleeve 2 more symmetrical, which helps to improve the overall balance and stability of the stirring blade structure, and such symmetry helps to reduce vibration and deviation during rotation, and improves stirring efficiency; on the other hand, the coaxial design makes the driving shaft 1 can more easily pass through the shaft hole 211 and enter the operation hole 221 for the press-in operation, which reduces the centering and positioning steps in the assembly process, improves the assembly efficiency and accuracy.

[0041] As shown in Figure 1 and Figure 2 Specifically, in the embodiment, the stirring blade structure further comprises a blade disc 5, and the driving shaft 1 is arranged in the blade disc 4.

[0042] In addition, the embodiment also provides a food processor comprising the stirring blade structure as described above, which has all the advantages of the stirring blade structure described above, and will not be repeated here.

[0043] In summary, the stirring blade structure and the food processor comprising the same disclosed by the present application can at least bring the following beneficial technical effects:

[0044] 1) By pressing the inner side wall of the operation hole 221 to make the outer side wall of the press-in section 22 deform, the fixation of the blade 3 is realized, and at the same time the size of the shaft hole 211 is not affected, which improves the assembly accuracy of the connecting sleeve 2 and the driving shaft 1;

[0045] 2) When L is not less than 1.5mm, it is ensured that the operation hole 221 has enough space for the press-in tool to operate, which is conducive to the smooth progress of the press-in process and the achievement of the press-in effect. Such depth setting can effectively avoid the problem of insufficient or failed press-in caused by too small size;

[0046] 3) Limiting L to be within 3.5mm avoids the problem of structural weakening caused by too large axial depth of the operation hole 221;

[0047] 4) The design of the stepped surface 23 not only enhances the structural strength of the connecting sleeve 2 in this area, but also provides a stable support surface for the limiting ring 4, which is arranged on the stepped surface 23, effectively preventing the axial movement of the connecting sleeve 2 on the driving shaft 1, thereby greatly improving the overall stability of the stirring blade structure.

[0048] The technical means disclosed by the utility model scheme are not limited to the technical means disclosed by the above-mentioned embodiments, and also include technical schemes composed of any combination of the above technical features. It should be noted that, for ordinary skilled persons in the art, without departing from the principles of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered within the protection scope of the utility model.

Claims

1. A stirring blade structure, characterized in that, include: Drive shaft (1); The connecting sleeve (2) includes a connecting sleeve section (21) and a pressing section (22) connected to each other. The sleeve section (21) is provided with a shaft hole (211), and the sleeve section (21) is sleeved on the drive shaft (1) through the shaft hole (211). The shaft hole (211) extends into the pressing section (22), and the pressing section (22) is provided with an operating hole (221). The operating hole (221) communicates with the shaft hole (211). The diameter of the operating hole (221) is larger than the diameter of the shaft hole (211). On a plane perpendicular to the axis of the shaft hole (211), the projection of the shaft hole (211) is located within the projection of the operating hole (221). The outer wall of the pressing section (22) is provided with a connecting groove (222). The blade (3) is disposed in the connecting groove (222). When the inner wall of the operating hole (221) is squeezed, the outer wall of the riveting section (22) will be bent and deformed to fix the blade (3) in the connecting groove (222).

2. The stirring blade structure according to claim 1, characterized in that, The axial depth of the operating hole (221) is defined as L, then L satisfies: 1.5mm≤L≤3.5mm.

3. The stirring blade structure according to claim 1, characterized in that, A laterally extending stepped surface (23) is formed at the junction of the shaft hole (211) and the operating hole (221); the drive shaft (1) is provided with a limit ring (4), which abuts against the stepped surface (23).

4. The stirring blade structure according to claim 3, characterized in that, The outer wall of the drive shaft (1) is provided with a fixing groove (12), and the limiting ring (4) is disposed in the fixing groove (12).

5. The stirring blade structure according to claim 3, characterized in that, The limiting ring (4) is elastic.

6. The stirring blade structure according to claim 1, characterized in that, When not under pressure, the connecting groove (222) has an L-shaped cross section in the axial direction of the drive shaft (1). When the inner wall of the operating hole (221) is squeezed, the connecting groove (222) will bend and deform in the vertical direction to fix the blade (3) to the connecting groove (222).

7. The stirring blade structure according to claim 1, characterized in that, The riveting section (22) is connected to the lower end of the sleeve section (21), and the operating hole (221) is located below the shaft hole (211).

8. The stirring blade structure according to claim 1, characterized in that, The drive shaft (1) is provided with a drive rib (11), and the shaft hole (211) is located on the inner side wall of the sleeve section (21) and is provided with a guide rib (212). The drive rib (11) and the guide rib (212) are engaged to connect the drive shaft (1) and the sleeve section (21).

9. The stirring blade structure according to any one of claims 1-8, characterized in that, The shaft hole (211) and the operating hole (221) are coaxially arranged.

10. A food processing machine, characterized in that, Includes the stirring blade structure as described in any one of claims 1-9.

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