Food processor

Abstract

The utility model belongs to the technical field of kitchen appliances, and discloses a food processor which comprises a stirring cup, a cutter assembly detachably installed in the stirring cup and a driving device for driving the cutter assembly, the cutter assembly comprises a cutter holder, a blade, a driven magnetic disc, a shaft sleeve, a bearing and a transmission shaft, and a shaft hole for the transmission shaft to extend out is formed in the upper wall of the cutter holder. The cutter assembly further comprises a shaft seal sealed at the position of the shaft hole, the shaft seal comprises an axial sealing part and a radial sealing part, the radial sealing part extends to the position between the upper end face of the shaft sleeve and the upper wall of the cutter holder, a sealing lip abutting against the transmission shaft is arranged on the inner side of the axial sealing part in a protruding mode, and a sealing ring rib abutting against the upper wall of the cutter holder is arranged on the radial sealing part in an upward protruding mode. The radial sealing part and the axial sealing part achieve double limiting of the shaft seal at the position of the shaft hole, and limiting is reliable; the sealing lip, the radial sealing part and the axial sealing part achieve the triple sealing effect, waterproof protection is formed on the driven magnetic disc, and effective transmission is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of kitchen appliances, and particularly relates to a food processor. BACKGROUND

[0002] The traditional food processor comprises a main machine with a built-in motor and a stirring cup installed above the main machine, a stirring blade is arranged in the stirring cup, a through hole is arranged on the bottom wall of the stirring cup for transmission connection of a shaft of the stirring blade and a rotating shaft of the motor, the stirring cup is complex in sealing, and the stirring blade cannot be detached from the stirring cup, so cleaning is difficult.

[0003] There is also a kind of blade assembly driven by magnetism, which can avoid the through hole on the bottom wall of the stirring cup and realize the disassembly and cleaning of the blade assembly. The blade assembly comprises a blade seat, a blade arranged above the blade seat, a driven disc and a shaft sleeve installed in the blade seat, a bearing installed in the shaft sleeve, and a transmission shaft penetrating through the bearing. An axial hole is formed in the upper wall of the blade seat for the transmission shaft to extend out, so that the transmission shaft connects the blade and the driven disc. The driving disc of the main machine drives the driven disc to rotate in the air, and the driven disc drives the transmission shaft and the blade to rotate to realize crushing.

[0004] However, the existing blade assembly is provided with a sealing ring at the axial hole to seal the gap between the transmission shaft and the axial hole. Specifically, the sealing ring is sleeved on the outer surface of the transmission shaft and is clamped and fixed by the transmission shaft and the shaft sleeve, and the top end of the sealing ring abuts against the axial hole of the blade seat. However, during the operation of the blade assembly, the transmission shaft rotates at a high speed, and when the load is too large, such as in the early stage of crushing, the transmission shaft will slightly deviate, so the sealing ring will move up and down or twist along the transmission shaft, which reduces the sealing effect, especially causes the sealing ring to fail to abut against the axial hole of the blade seat tightly, the sealing between the blade seat and the shaft sleeve fails, and the risk of water entering the blade seat increases. If water enters the blade seat, the driven disc will rust, and reliable power transmission cannot be ensured. In particular, the driven disc of the blade assembly driven by magnetism will be subjected to the magnetic attraction force of the driving disc during the operation, and the axial magnetic attraction force of the driven disc will be decomposed to the shaft seal of the blade assembly, so that the shaft seal not only bears the circumferential friction of the transmission shaft during the operation, but also bears the radial pressure of the transmission shaft. TECHNICAL SOLUTION

[0005] The utility model provides a kind of food processor, the blade assembly based on magnetic transmission, solve the sealing ring of the axial hole position in prior art exists up and down the situation of moving, and additional bearing axial force of transmission shaft, cause the sealing failure between blade seat and shaft sleeve, in turn it will cause the driven disc rust and cannot reliably transmit power technical problem.

[0006] The technical scheme adopted by the utility model is as follows:

[0007] The utility model provides a kind of food processing machine, including stirring cup, the knife assembly of detachable installation in stirring cup, the driving device of driving the knife assembly, the knife assembly includes tool holder, the blade located above tool holder, driven disk and shaft sleeve installed in tool holder, bearing installed in shaft sleeve, transmission shaft is passed in bearing, the upper wall of the tool holder is opened for the shaft hole of transmission shaft extension, make transmission shaft connect the blade with driven disk, the knife assembly further include the shaft seal sealed at shaft hole, the shaft seal includes the axial sealing portion clamped between transmission shaft and the sidewall of shaft sleeve and the radial sealing portion outwardly folded from the top end of axial sealing portion, the radial sealing portion extends between the upper end surface of shaft sleeve and the upper wall of tool holder, the inside of axial sealing portion is provided with the sealing lip abutting with transmission shaft, the radial sealing portion is upwardly provided with the sealing ring rib abutting with the upper wall of tool holder.

[0008] The food processing machine provided by the utility model sets the shaft seal at the shaft hole, the shaft seal includes the axial sealing portion clamped between the transmission shaft and the sidewall of the shaft sleeve and the radial sealing portion outwardly folded from the top end of the axial sealing portion, the annular gap between the transmission shaft and the shaft sleeve is sealed by the axial sealing portion, and reliable limiting of the shaft seal in the radial direction is realized, so that radial deflection and torsion of the shaft seal are avoided; the radial sealing portion extends between the upper end surface of the shaft sleeve and the upper wall of the tool holder, so that the transverse gap between the shaft sleeve and the tool holder is sealed, and reliable limiting of the shaft seal in the axial direction is realized, so that axial movement of the shaft seal is avoided, thus, the shaft seal can be stably positioned at the shaft hole, transmission is avoided, and effective sealing is realized.

[0009] In a preferred embodiment, the sealing lip extends upwardly and into the shaft hole.

[0010] By setting the sealing lip to extend upwardly and into the shaft hole, the sealing lip directly fills the space between the transmission shaft and the shaft hole, prevents water from entering the shaft hole, solves the problem of water entering the tool holder from the source, and improves the sealing effect of the tool holder.

[0011] In a preferred embodiment, a limiting rib is provided on the outer side of the axial sealing portion, the limiting rib extending circumferentially along the axial sealing portion and abutting against the side wall of the bushing.

[0012] By providing a limiting rib protruding from the outside of the axial sealing part, the limiting rib extends circumferentially along the axial sealing part and abuts against the side wall of the bushing. Therefore, the annular gap between the axial sealing part and the side wall of the bushing can be sealed in all directions by the limiting rib. At the same time, the limiting rib makes line contact with the side wall of the bushing, which enhances the sealing effect and facilitates the labor-saving installation of the axial sealing part and the bushing, so that the shaft seal can be installed in place.

[0013] In a preferred embodiment, the shaft seal further includes a support frame injection-molded within the axial sealing portion and / or the radial sealing portion.

[0014] By setting up a support frame, rigid support is achieved, improving the mechanical strength of the axial or radial sealing part. The shaft seal can maintain its shape and prevent deformation. During installation, the shaft seal is less prone to twisting or misalignment, achieving precise installation. Therefore, the combination of the support frame and the axial or radial sealing part balances rigid support and flexible sealing, ensuring the durability of the dynamic seal.

[0015] In a preferred embodiment, an oil reservoir is provided between the lower end of the axial seal and the upper end of the bearing.

[0016] Since the shaft seal utilizes a combination of axial and radial sealing parts to enhance the sealing effect, and the shaft hole of the tool holder already achieves a good seal, the sealing between the axial sealing part and the bearing can be simplified. There is no need for the bearing and the axial sealing part to abut against each other, thus allowing for the provision of oil storage space and solving the problem of dry bearing friction. Based on this, an oil storage chamber is provided between the lower end of the axial sealing part and the upper end of the bearing. This oil storage chamber can hold grease to lubricate the bearing and drive shaft, reducing wear, lowering operating noise, and extending service life.

[0017] In a preferred embodiment, the bushing includes a shaft seal mounting section for mounting the shaft seal and a bearing mounting section for mounting the bearing. The shaft seal mounting section is connected above the bearing mounting section and tapers relative to the inner diameter of the bearing mounting section to form a step. The upper end of the bearing axially abuts against the step.

[0018] The bushing includes a shaft seal mounting section and a bearing mounting section, enabling centralized installation of the shaft seal and bearing. By contracting the shaft seal mounting section relative to the bearing mounting section, the annular gap between the drive shaft and the bushing can be reduced, lowering the sealing difficulty of the shaft seal and improving the sealing effect. The upper end of the bearing axially abuts against the step, achieving reliable axial positioning and facilitating accurate and smooth press-fitting of the bearing into place, ensuring stable rotation of the drive shaft and preventing wobbling.

[0019] In a preferred embodiment, the bushing includes a cylindrical body that houses the bearing and the shaft seal, and a body that is connected to the lower end of the cylindrical body and extends outward. The body surrounds the outer periphery of the driven disk, and the lower end of the body abuts against the lower wall of the tool holder. A clearance gap is formed between the driven disk and the lower wall of the tool holder.

[0020] More preferably, the tool holder includes an upper housing and a lower housing, the upper housing being sleeved and fixed to the side wall of the lower housing and axially clamping the body to limit the axial movement of the bushing.

[0021] In existing tool assemblies, the tool holder comprises an upper and lower housing. Using the upper housing as the mounting reference, the driven disk is suspended on the upper housing via a drive shaft, hovering relative to the lower housing. The lower and upper housings then mate, indirectly determining the clearance between the driven disk and the bottom wall of the lower housing. This results in a long dimensional chain for the core components such as the drive shaft and the driven disk, making precise control of the clearance between the driven disk and the lower housing impossible. Therefore, this embodiment reduces the axial dimensional chain of the tool assembly by abutting the bushing against the lower wall of the tool holder, i.e., the lower housing. This allows for more direct and precise control of the clearance between the lower housing and the bottom surface of the driven disk, enabling precise control of the clearance size as required. This achieves rotational clearance between the driven disk and the lower wall of the tool holder, ensuring smooth rotation of the driven disk, and also reduces the distance between the driven disk and the drive device, such as the drive disk, improving the effectiveness and reliability of the transmission.

[0022] Furthermore, in existing solutions using detachable blade assemblies, the upper and lower housings form a closed internal cavity. During operation of the food processor, the blade assembly placed inside the mixing cup experiences increased internal pressure due to heat. This internal pressure acts on the shaft seal, which is directly connected to the outside. This pressure, along with changes in the blade assembly's temperature and the magnetic attraction between the blade assembly and the active disk, generates completely opposite axial forces—both inward and outward—accelerating the shaft seal's functional failure. By using the sidewalls of the upper and lower housings to fix and axially clamp the body, the shaft sleeve is axially limited, simplifying the assembly process. Moreover, the nested structure formed by the upper and lower housings absorbs axial assembly tolerances of the blade assembly, further preventing the accumulation of axial tolerances.

[0023] In a preferred embodiment, the lower wall of the tool holder includes a horizontally extending main wall, an upwardly inclined transition wall, and a horizontally extending boss located below the driven disk, from the edge to the center.

[0024] Because the thickness of the lower wall of the tool holder cannot be too thick, as this would affect the reliable transmission between the drive disk and the driven disk, and also make the tool holder too heavy, inconvenient to handle and clean, it also cannot be too thin, as this would make the structure prone to deformation. Therefore, by setting the lower wall of the tool holder as a main wall, an upwardly inclined transition wall, and a horizontally extending boss located below the driven disk, the lower wall of the tool holder has a reinforced structure that bends inward from the edge. While ensuring the structural strength of the lower wall of the tool holder, the lower wall of the tool holder can be made as thin as possible, reducing the weight of the tool assembly, and improving the sensitivity and reliability of the transmission.

[0025] In a preferred embodiment, the sealing ring rib has a triangular cross-section and the tip of the sealing ring rib abuts against the upper wall of the tool holder.

[0026] The sealing ring ribs can form line contact with the apex of their triangular cross-sections, rather than the surface contact of rectangular cross-sections. Under the same clamping force, the contact pressure per unit area is significantly increased, thereby improving the sealing effect between the sealing ring ribs and the upper wall of the tool holder. Moreover, when the sealing ring ribs with triangular cross-sections are compressed, the apex preferentially undergoes elastic deformation and expands to both sides, achieving flexible elastic deformation, enhancing radial and axial sealing forces, achieving a good seal, and also facilitating installation. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0028] Figure 1This is a cross-sectional structural diagram of a food processing machine according to one embodiment of the present invention;

[0029] Figure 2 This is a cross-sectional structural diagram of the blade assembly in one embodiment of the present invention;

[0030] Figure 3 for Figure 2 Enlarged diagram of section A in the middle;

[0031] Figure 4 This is a schematic diagram of the shaft seal structure in one embodiment of the present invention;

[0032] Figure 5 This is a partial structural diagram of the shaft seal in one embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the bushing structure in one embodiment of the present invention;

[0034] Figure 7 This is a partial structural diagram of the shaft seal in another embodiment of the present invention.

[0035] List of components and reference numerals:

[0036] 10. Stirring cup; 20. Blade assembly; 30. Main unit; 40. Drive unit; 41. Motor; 42. Drive disk; 21. Blade holder; 210. Shaft hole; 211. Main body wall; 212. Transition wall; 213. Boss; 22. Blade; 23. Driven disk; 24. Bushing; 241. Shaft seal mounting section; 242. Bearing mounting section; 243. Step; 244. Cylinder; 245. Main body; 25. Bearing; 26. Drive shaft; 27. Shaft seal; 271. Axial seal; 272. Radial seal; 273. Sealing lip; 274. Sealing ring rib; 275. Limiting rib; 276. Support frame; 277. Oil reservoir. Detailed Implementation

[0037] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0038] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0039] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] like Figure 1 As shown, this utility model provides a food processing machine, including a mixing cup 10, a blade assembly 20 detachably installed inside the mixing cup 10, and a driving device 40 for driving the blade assembly 20, as shown. Figure 2 As shown, the tool assembly 20 includes a tool holder 21, a blade 22 located above the tool holder 21, a driven disk 23 and a bushing 24 installed inside the tool holder 21, a bearing 25 installed inside the bushing 24, and a drive shaft 26 passing through the bearing 25. The upper wall of the tool holder 21 has a shaft hole 210 for the drive shaft 26 to extend out, allowing the drive shaft 26 to connect the blade 22 to the driven disk 23. Figure 3 , 4As shown in Figure 5, the tool assembly 20 also includes a shaft seal 27 sealed in the shaft hole 210. The shaft seal 27 includes an axial sealing portion 271 clamped between the drive shaft 26 and the side wall of the bushing 24 and a radial sealing portion 272 folded outward from the top of the axial sealing portion 271. The radial sealing portion 272 extends to the space between the upper end face of the bushing 24 and the upper wall of the tool holder 21. The inner side of the axial sealing portion 271 is provided with a sealing lip 273 that abuts against the drive shaft 26. The radial sealing portion 272 is provided with a sealing ring rib 274 that abuts against the upper wall of the tool holder 21.

[0043] The food processing machine provided in this embodiment provides a shaft seal 27 at the shaft hole 210. The shaft seal 27 includes an axial sealing portion 271 clamped between the drive shaft 26 and the side wall of the bushing 24, and a radial sealing portion 272 folded outward from the top of the axial sealing portion 271. The axial sealing portion 271 seals the annular gap between the drive shaft 26 and the bushing 24 and achieves reliable radial positioning of the shaft seal 27, preventing radial sway and torsion of the shaft seal 27. The radial sealing portion 272 extends to the upper end face of the bushing 24 and the upper wall of the cutter holder 21, thereby sealing the transverse gap between the bushing 24 and the cutter holder 21 and achieving reliable axial positioning of the shaft seal 27, preventing axial movement of the shaft seal 27. Therefore, the shaft seal 27 can be firmly fixed in the shaft hole 210 position and achieve effective sealing. Meanwhile, the inner side of the axial sealing part 271 is provided with a sealing lip 273 that abuts against the drive shaft 26, and the radial sealing part 272 is provided with a sealing ring rib 274 that abuts against the upper wall of the tool holder 21. The sealing lip 273 strengthens the sealing around the drive shaft 26, and the sealing ring rib 274 further strengthens the sealing between the upper wall of the tool holder 21 and the bushing 24. In summary, the sealing lip 273 serves as the first seal, the radial sealing part 272 serves as the second seal, and the axial sealing part 271 serves as the third seal, achieving an all-round seal at the shaft hole 210 position of the tool holder 21, effectively preventing water from entering the interior of the tool holder 21, protecting the driven disk 23, and achieving effective transmission.

[0044] like Figure 1 As shown, preferably, the food processor also includes a main unit 30 that supports the mixing cup 10. The mixing cup 10 can be detachably installed on top of the main unit 30 or fixed on top of the main unit 30. The drive device 40 is installed inside the main unit 30.

[0045] It should be noted that this utility model does not limit the specific structure of the driving device 40. For example, in a preferred embodiment, such as... Figure 1 As shown, the drive device 40 includes a motor 41 and a drive disk 42 driven by the shaft of the motor 41. The drive disk 42 is located below the driven disk 23 and drives the driven disk 23 to rotate remotely.

[0046] Of course, in another preferred embodiment, the driving device 40 is an electromagnetic coil that generates a magnetic field after being energized, including a stator and a coil winding wound on the stator. The electromagnetic coil surrounds the outer periphery of the driven disk 23 and drives the driven disk 23 to rotate in the air.

[0047] Whether the drive device 40 uses a motor 41 and a drive disk 42 or a stator and coil windings, it can drive the driven disk 23 through changes in the magnetic field, thereby achieving effective rotation of the blade 22 and realizing the crushing and processing of food ingredients.

[0048] like Figure 3 As shown, in a preferred embodiment, the sealing lip 273 extends upwardly into the shaft hole 210.

[0049] By tilting the sealing lip 273 upward and extending it into the shaft hole 210, the sealing lip 273 directly fills the space between the drive shaft 26 and the shaft hole 210, preventing water from entering the shaft hole 210, thus solving the water ingress problem of the tool holder 21 from the source and improving the sealing effect of the tool holder 21.

[0050] like Figure 5 As shown, in a preferred embodiment, a limiting rib 275 protrudes from the outer side of the axial sealing portion 271, combined with... Figure 3 The limiting rib 275 extends circumferentially along the axial sealing part 271 and abuts against the side wall of the bushing 24.

[0051] By providing a limiting rib 275 protruding from the outer side of the axial sealing part 271, the limiting rib 275 extends circumferentially along the axial sealing part 271 and abuts against the side wall of the bushing 24. Therefore, the annular gap between the axial sealing part 271 and the side wall of the bushing 24 can be sealed in all directions by the limiting rib 275. At the same time, the limiting rib 275 makes line contact with the side wall of the bushing 24, which enhances the sealing effect and facilitates the labor-saving installation of the axial sealing part 271 and the bushing 24, so that the shaft seal 27 can be installed in place.

[0052] like Figure 3 As shown, in a preferred embodiment, the sealing ring rib 274 has a triangular cross-section and the tip of the sealing ring rib 274 abuts against the upper wall of the knife holder 21.

[0053] Of course, the sealing ring rib 274 can also be a rectangular cross-section rib. A triangular cross-section for the sealing ring rib 274 allows for line contact at the apex of the triangle, rather than the surface contact of a rectangular cross-section. Under the same clamping force, the contact pressure per unit area is significantly increased, thereby improving the sealing effect between the sealing ring rib 274 and the upper wall of the knife holder 21. Furthermore, when under pressure, the triangular cross-section of the sealing ring rib 274 preferentially undergoes elastic deformation at its apex and expands to both sides, achieving flexible elastic deformation, enhancing radial and axial sealing forces, achieving a good seal, and facilitating installation.

[0054] like Figure 5 As shown, in a preferred embodiment, the shaft seal 27 further includes a support frame 276 injection-molded within the axial sealing portion 271 or the radial sealing portion 272. More preferably, as shown... Figure 5 As shown, the support frame includes a transverse wall injection-molded in the radial sealing portion 272 and a vertical wall injection-molded in the axial sealing portion 271.

[0055] Of course, in other preferred embodiments, silicone with higher hardness can be used to form the axial sealing portion 271 and the radial sealing portion 272, thereby eliminating the need for a support frame, see reference. Figure 7 As shown.

[0056] By setting up the support frame 276, rigid support is achieved, improving the mechanical strength of the axial sealing part 271 or the radial sealing part 272. The shaft seal 27 can maintain its shape and prevent deformation. During installation, the shaft seal 27 is not easily twisted or misaligned, achieving precise installation. Therefore, the combination of the support frame 276 and the axial sealing part 271 or the radial sealing part 272 balances rigid support and flexible sealing, ensuring the durability of the dynamic seal.

[0057] like Figure 3 As shown, in a preferred embodiment, an oil reservoir 277 is provided between the lower end of the axial sealing portion 271 and the upper end of the bearing 25.

[0058] Since the shaft seal 27 enhances the sealing effect by combining the axial sealing part 271 and the radial sealing part 272, and the shaft hole 210 of the tool holder 21 has already achieved a good seal, the sealing between the axial sealing part 271 and the bearing 25 can be simplified. There is no need for the bearing 25 and the axial sealing part 271 to abut against each other for sealing. This allows for the provision of oil storage space and solves the problem of dry friction of the bearing 25. Based on this, an oil storage cavity 277 is provided between the lower end of the axial sealing part 271 and the upper end of the bearing 25. The oil storage cavity 277 can hold grease to lubricate the bearing 25 and the drive shaft 26, reduce wear, reduce working noise, and extend service life.

[0059] like Figure 6As shown, in a preferred embodiment, the bushing 24 includes a shaft seal mounting section 241 for mounting the shaft seal 27 and a bearing mounting section 242 for mounting the bearing 25. The shaft seal mounting section 241 is connected above the bearing mounting section 242 and tapers relative to the inner diameter of the bearing mounting section 242 to form a step 243. Figure 2 , 3 As shown, the upper end of the bearing 25 axially abuts against the step 243.

[0060] The bushing 24 includes a shaft seal mounting section 241 and a bearing mounting section 242, enabling centralized mounting of the shaft seal 27 and the bearing 25. By contracting the shaft seal mounting section 241 relative to the bearing mounting section 242, the annular gap between the drive shaft 26 and the bushing 24 can be reduced, lowering the sealing difficulty of the shaft seal 27 and improving the sealing effect. The upper end of the bearing 25 axially abuts against the step 243, achieving reliable axial positioning and facilitating accurate and smooth press-fitting of the bearing 25 into place, ensuring stable rotation of the drive shaft 26 and preventing wobbling.

[0061] like Figure 6 As shown, in a preferred embodiment, the bushing 24 includes a cylindrical body 244 that houses the bearing 25 and the shaft seal 27, and a body 245 that is connected to the lower end of the cylindrical body 244 and extends outward. The body 245 surrounds the outer periphery of the driven disk 23, and the lower end of the body 245 abuts against the lower wall of the tool holder 21. A clearance gap is formed between the driven disk 23 and the lower wall of the tool holder 21.

[0062] More preferably, the tool holder 21 includes an upper housing and a lower housing, the upper housing and the lower housing are sleeved and fixed to each other on the side walls and axially clamp the body 245 to limit the axial movement of the bushing 24.

[0063] Because in the existing tool assembly 20, the tool holder 21 includes an upper housing and a lower housing. Taking the upper housing of the tool holder 21 as the installation reference, the driven disk 23 is suspended on the upper housing via the drive shaft 26, which is suspended relative to the lower housing. The lower housing and the upper housing then cooperate, indirectly determining the clearance between the driven disk 23 and the bottom wall of the lower housing. This results in a long positioning dimension chain for core components such as the drive shaft 26 and the driven disk 23, and the clearance between the driven disk 23 and the lower housing cannot be precisely controlled. Therefore, this embodiment reduces the axial fit dimension chain of the tool assembly 20 by abutting the body 245 of the bushing 24 against the lower wall of the tool holder 21, i.e., the lower housing. This allows for more direct and precise control of the clearance formed between the lower housing and the bottom surface of the driven disk 23, enabling precise control of the clearance size as required. This achieves rotational clearance between the driven disk 23 and the lower wall of the tool holder 21, ensuring smooth rotation of the driven disk 23. It also reduces the distance between the driven disk 23 and the drive device 40, such as the drive disk 42, thereby improving the effectiveness and reliability of the transmission.

[0064] The upper and lower housings are fixed by sleeved connection and axial clamping of the body 245 to limit the axial position of the bushing 24, which simplifies the assembly process. The upper and lower housings form a nested structure, which can absorb the axial assembly tolerance of the tool assembly 20 and further avoid the stacking of axial tolerances of the tool assembly 20.

[0065] like Figure 2 As shown, in a preferred embodiment, the lower wall of the tool holder 21 includes a horizontally extending main body wall 211, an upwardly inclined transition wall 212, and a horizontally extending boss 213, which is located below the driven disk 23.

[0066] Because the thickness of the lower wall of the tool holder 21 cannot be too thick, it would affect the reliable transmission between the drive disk 42 and the driven disk 23, and also make the tool holder 21 too heavy, making it inconvenient to handle and clean. However, it cannot be too thin either, as this would cause the structure to be easily deformed. Therefore, by setting the lower wall of the tool holder 21 as a main wall 211, an upwardly inclined transition wall 212, and a horizontally extending boss 213, with the boss 213 located below the driven disk 23, the lower wall of the tool holder 21 has a reinforced structure that bends inward from the edge. While ensuring the structural strength of the lower wall of the tool holder 21, the lower wall of the tool holder 21 can be made as thin as possible, reducing the weight of the tool assembly 20, and improving the sensitivity and reliability of the transmission.

[0067] More preferably, a protrusion is provided at the center of the boss to further enhance the structural strength and prevent deformation of the lower wall of the tool holder.

[0068] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0069] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0070] The above are merely embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A food processing machine, comprising a mixing cup, a blade assembly detachably mounted within the mixing cup, and a drive device for driving the blade assembly, the blade assembly comprising a blade holder, a blade located above the blade holder, a driven disk and a bushing mounted within the blade holder, a bearing mounted within the bushing, and a drive shaft passing through the bearing, wherein the upper wall of the blade holder has a shaft hole for the drive shaft to extend out, so that the drive shaft connects the blade to the driven disk, characterized in that, The knife assembly further comprises a shaft seal sealed at the shaft hole, the shaft seal comprising an axial sealing part clamped between the transmission shaft and the shaft sleeve side wall, and a radial sealing part folded outward from the top end of the axial sealing part, the radial sealing part extending between the upper end face of the shaft sleeve and the upper wall of the knife seat, the inner side of the axial sealing part being provided with a sealing lip abutting against the transmission shaft, and the radial sealing part being provided with a sealing ring rib upward abutting against the upper wall of the knife seat.

2. A food processor as claimed in claim 1, characterised in that The sealing lip extends upwardly and obliquely into the shaft hole.

3. A food processor as claimed in claim 1, wherein The outer side of the axial sealing part is provided with a limiting rib extending along the circumference of the axial sealing part and abutting against the shaft sleeve side wall.

4. The food processor of claim 1, wherein, The shaft seal further comprises a support framework injection molded in the axial sealing part and / or the radial sealing part.

5. The food processor of claim 1, wherein, An oil storage cavity is arranged between the lower end of the axial sealing part and the upper end of the bearing.

6. A food processor as claimed in claim 1 or claim 5, wherein, The shaft sleeve comprises a shaft seal mounting section mounting the shaft seal and a bearing mounting section mounting the bearing, the shaft seal mounting section being connected above the bearing mounting section and being contracted in the inner diameter of the bearing mounting section to form a step, the upper end of the bearing axially abutting against the step.

7. The food processor of claim 1, wherein, The shaft sleeve comprises a cylinder accommodating the bearing and the shaft seal, and a body connected at the lower end of the cylinder and extending outward, the body surrounding the outer periphery of the driven magnetic disc, the lower end of the body abutting against the lower wall of the knife seat, and the driven magnetic disc and the lower wall of the knife seat forming an avoiding gap.

8. A food processor as claimed in claim 7, characterised in that, The knife seat comprises an upper shell and a lower shell, the side walls of the upper shell and the lower shell being sleeved and fixed and axially clamping the body to axially limit the shaft sleeve.

9. The food processor of claim 1, wherein, The lower wall of the knife seat comprises a main body wall extending horizontally from the edge to the middle part, a transition wall obliquely upward, and a horizontal extending boss, the boss being located below the driven magnetic disc.

10. The food processor of claim 1, wherein, The cross section of the sealing ring rib is triangular, and the tip of the sealing ring rib abuts against the upper wall of the knife seat. The cross section of the sealing ring rib is triangular, and the tip of the sealing ring rib abuts against the upper wall of the knife seat.

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