Detachable knife assembly and food processor
The flexible ring and inner and outer bushing clamping and fixing structure simplifies the manufacturing process of detachable blades in food processors, reduces costs and improves stability, and solves the problem of complex existing detachable blade structures.
Patent Information
- Application Number
- CN202520217460.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-02-11
AI Technical Summary
The detachable blade structure of existing food processors is complex, resulting in high costs and complicated manufacturing processes.
The flexible ring and inner and outer bushings are clamped and fixed. The inner and outer bushings are detachably connected. Combined with the interference fit between the flexible ring and the cutter shaft, laser welding is avoided, the manufacturing process is simplified and the stability is improved.
The simplified structure of the detachable blade assembly reduces costs and ensures that the blade assembly does not detach when inverted, making cleaning easier.
Smart Images
Figure CN223817434U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of small household appliance technology, and more specifically, to a detachable knife assembly and a food processor. Background Technology
[0002] Some food processors, such as high-speed blenders, feature detachable blades, greatly simplifying the cleaning of the blender's container. However, the structure and manufacturing process of some detachable blades result in higher costs. For example, detachable blades involve numerous components, including a bushing connected to the blade shaft, a handle threaded to the bushing, and a blade cap mounted on top of the handle, making the structure complex. Furthermore, the blade cap and handle require laser welding, complicating the manufacturing process. Summary of the Invention
[0003] This application provides a detachable blade assembly and a food processor with a simpler structure and manufacturing process.
[0004] A detachable knife assembly, comprising:
[0005] Cutter shaft;
[0006] A cutting tool assembly is detachably connected to the cutting tool shaft. The cutting tool assembly includes a cutting blade, a flexible ring made of flexible material, an inner bushing and an outer bushing fitted onto the cutting tool shaft. The outer bushing is fitted outside the inner bushing. The cutting blade and the flexible ring are clamped and fixed between the inner bushing and the outer bushing by the connecting force between the inner bushing and the outer bushing along the axial direction of the cutting tool shaft. The flexible ring is fitted onto the cutting tool shaft and is also interference-fitted with the cutting tool shaft.
[0007] The detachable tool assembly provided in this application features a detachable connection between the inner and outer bushings. The connection force between the two bushings can clamp and fix the cutting tool and the flexible ring, eliminating the need for laser welding and simplifying the manufacturing process with low cost. Furthermore, the flexible ring, clamped and fixed by the inner and outer bushings, is also fitted onto the tool shaft with an interference fit. This ensures that the tool assembly will not detach from the tool shaft when inverted, thus eliminating the need for a tool cap at the top of the tool shaft and simplifying the structure.
[0008] Optionally, the inner bushing is threadedly connected to the outer bushing. Threaded connections are robust, reliable, and easy to implement.
[0009] Optionally, the inner surface of the outer bushing is provided with a step, and the flexible ring is pressed against the step by the inner bushing. This arrangement can prevent the flexible ring from shifting along the cutter shaft axis and improve the stability of the flexible ring's position.
[0010] Optionally, the outer surface of the outer bushing has a recess for hand gripping, and the step is located below the recess. The inner bushing is connected to the lower end of the outer bushing. This allows the recess on the outer surface and the step on the inner surface to be offset along the tool shaft axis, thereby avoiding a smaller wall thickness of the outer bushing at the step, reducing the risk of cracking of the outer bushing, and also reducing the axial dimension of the inner bushing.
[0011] Optionally, the cutter assembly further includes a sleeve fitted around the outside of the cutter shaft and located inside the outer bushing. One end of the sleeve along the axial direction of the cutter shaft abuts against the flexible ring, and the other end along the axial direction of the cutter shaft abuts against the inner bushing. With this configuration, the sleeve can serve as an intermediate limiting member, abutting against both the flexible ring and the inner bushing to limit the axial distance between them. This design is simple and provides reliable limiting.
[0012] Optionally, the radial width of the end face of the sleeve that contacts the flexible ring is greater than the radial width of the end face of the inner bushing that contacts the sleeve. This results in a larger end face area at the end of the sleeve that contacts the flexible ring, which allows for more even stress distribution on the flexible ring and prevents damage due to excessive localized stress.
[0013] Optionally, the outer surface of the outer bushing has a recess for hand gripping, and the step is located above the recess. On one hand, the recess on the outer surface and the step on the inner surface are offset along the blade shaft axis, which avoids the outer bushing having a thinner wall at the step, reducing the risk of cracking. Furthermore, the flexible ring can be closer to the top of the blade shaft, thus preventing more food from flowing into the outer bushing from the top of the blade shaft, resulting in a better sealing effect.
[0014] Optionally, the end of the sleeve that contacts the flexible ring is located above the recess, and the end that contacts the inner bushing is located below the recess. This arrangement results in a larger axial dimension of the sleeve, which in turn reduces the axial dimension of the inner bushing.
[0015] Optionally, the end of the sleeve that contacts the flexible ring is located above the recess, and the end that contacts the inner bushing is also located above the recess. This facilitates the machining of the sleeve, but requires a corresponding increase in the axial dimension of the inner bushing.
[0016] Optionally, the inner bushing is connected to the cutter shaft via a drive connection. The inner bushing is closer to the cutter shaft, making it more convenient to transmit power to it via the cutter shaft.
[0017] Optionally, the cutter assembly further includes an anti-slip pad sleeved on the cutter shaft, and clamped and fixed between the outer and inner bushings by the axial connection force between the inner and outer bushings. The anti-slip pad includes an anti-slip surface with recesses, and the anti-slip surface contacts the cutting blade. The anti-slip surface is formed with a relatively large roughness, which can increase the resistance to relative rotation between the anti-slip pad and the cutting blade, making the cutter assembly structure difficult to disassemble, ensuring the stability of the entire cutter assembly structure and the firmness after assembly.
[0018] A food processor, comprising:
[0019] The main unit includes a housing and a motor shaft extending outside the housing; the cup assembly includes a cup body, a blade disc, and a detachable blade assembly as described in any of the preceding embodiments, wherein the cup body forms a cup cavity, the blade disc forms the bottom of the cup body, the blade shaft is rotatably mounted on the blade disc, the blade assembly is disposed within the cup cavity, and the motor shaft engages with the blade shaft. The blade assembly and blade shaft are detachable, facilitating cleaning of the cup body and blade assembly. Attached Figure Description
[0020] Figure 1 This is a cross-sectional view of a portion of the food processor structure shown in an exemplary embodiment of this application;
[0021] Figure 2 yes Figure 1 An exploded view of the food processor's structural components is shown in the image.
[0022] Figure 3 This is a cross-sectional view of a portion of the food processor structure shown in yet another exemplary embodiment of this application;
[0023] Figure 4 yes Figure 3 An exploded view of the food processor's structural components is shown in the image.
[0024] Figure 5 This is a cross-sectional view of a portion of the structure of a food processor as illustrated in another exemplary embodiment of this application;
[0025] Figure 6 yes Figure 5 An exploded view of the food processor's structural components is shown in the image.
[0026] Figure 7 This is an exploded view of a food processor shown in an exemplary embodiment of this application. Detailed Implementation
[0027] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.
[0028] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.
[0029] Please refer to Figure 1 and Figure 2 , Figure 1 This is a cross-sectional view of a portion of the structure of a food processor, as illustrated in an exemplary embodiment of this application. Figure 2 yes Figure 1 An exploded view of a portion of the food processor's structure is shown in the image.
[0030] This application provides a detachable tool assembly 100, which includes a tool shaft 10 and a tool assembly 20 detachably mounted on the tool shaft 10.
[0031] The cutting tool assembly 20 includes a cutting blade 21, a flexible ring 22 made of a flexible deformable material, an inner bushing 23 and an outer bushing 24 fitted onto the cutting tool shaft 10. The outer bushing 24 is fitted outside the inner bushing 23 and can be detachably connected to the inner bushing 23, with the direction of the connection force aligned with the cutting tool shaft axis. For example, the inner bushing 23 can be snapped onto the outer bushing 24 along the cutting tool shaft axis, or the inner bushing 23 can be threaded onto the outer bushing 24.
[0032] The blade 21 and the flexible ring 22 are clamped and fixed between the inner bushing 23 and the outer bushing 24 by the axial connection force between the inner bushing 23 and the outer bushing 24. The blade 21 can be sleeved on the cutter shaft 10, with the blade edge exposed. The flexible ring 22 is located inside the inner bushing 23 or the outer bushing 24 and is sleeved on the cutter shaft 10, with an interference fit between the flexible ring 22 and the cutter shaft 10. The flexible ring 22 includes, but is not limited to, a silicone ring.
[0033] As described above, the inner bushing 23 and the outer bushing 24 are detachably connected. The connection force between them can also clamp and fix the blade 21 and the flexible ring 22, eliminating the need for laser welding and simplifying the manufacturing process with low cost. Furthermore, the flexible ring 22, clamped and fixed by the inner bushing 23 and the outer bushing 24, is also fitted onto the cutter shaft 10 with an interference fit. This ensures that the blade assembly 20 will not detach from the cutter shaft 10 when inverted, thus eliminating the need for a blade cap at the top of the cutter shaft 10 and simplifying the structure.
[0034] In this embodiment, the inner bushing 23 and the outer bushing 24 are threadedly connected. The inner bushing 23 has external threads, and the outer bushing 24 has internal threads. The inner bushing 23 is connected to the lower end of the outer bushing 24. The threaded connection is robust, reliable, and easy to implement.
[0035] exist Figure 1 and Figure 2 In the illustrated embodiment, the inner bushing 23 is configured as a stepped T-shaped bushing with an external thread at its small end. The inner bushing 23 is screwed into the lower end of the outer bushing 24 and engages with the internal thread of the outer bushing 24. The blade 21 is held between the lower end of the outer bushing 24 and the large end of the inner bushing 23. One or more blades 21 can be provided, and the structures of each blade 21 can be the same or different. In this embodiment, two blades 21 are provided, one of which is a four-blade blade and the other is a two-blade blade, but this is not a limitation. A mounting hole can be provided in the middle of the blade 21, through which the blade shaft 10 passes.
[0036] In one embodiment, the inner surface of the outer bushing 24 is provided with a step 240, and the flexible ring 22 is pressed against the step 240 by the inner bushing 23. This arrangement can prevent the flexible ring 22 from shifting along the tool shaft axis, thus improving the stability of the flexible ring 22's position. It should be noted that the position of the flexible ring 22 may vary depending on the location of the step 240.
[0037] In one embodiment, the outer surface of the outer bushing 24 is provided with a recess 241 for hand gripping, which facilitates the assembly and disassembly of the tool assembly 20. A step 240 is located below the recess 241, and the inner bushing 23 is connected to the lower end of the outer bushing 24. This arrangement offsets the recess 241 on the outer surface from the step 240 on the inner surface along the tool shaft axial direction, thereby preventing the outer bushing 24 from having a smaller wall thickness at the step 240, reducing the risk of cracking, and also reducing the axial dimension of the inner bushing 23.
[0038] Please refer to Figures 3 to 6 , Figure 3 This is a cross-sectional view of a portion of the structure of a food processor shown in another embodiment of this application. Figure 4 yes Figure 3 An exploded view of a portion of the food processor's structure is shown in the image. Figure 5 This is a cross-sectional view of a portion of the structure of a food processor shown in another embodiment of this application. Figure 6 yes Figure 5 An exploded view of a portion of the food processor's structure is shown in the image.
[0039] In one embodiment, the cutter assembly 20 further includes a sleeve 25 sleeved on the outside of the cutter shaft 10 and located inside the outer bushing 24. One end of the sleeve 25 along the axial direction of the cutter shaft abuts against the flexible ring 22, and the other end along the axial direction of the cutter shaft abuts against the inner bushing 23. With this configuration, the sleeve 25 can serve as an intermediate limiting member, abutting against both the flexible ring 22 and the inner bushing 23 to limit the axial distance between them. This design is simple in structure and provides reliable limiting.
[0040] In one embodiment, the radial width L1 of the end face of the sleeve 25 that contacts the flexible ring 22 is greater than the radial width L2 of the end face of the inner bushing 23 that contacts the sleeve 25. That is, the inner bushing 23 presses the flexible ring 22 against the sleeve 25. Furthermore, because the radial width L1 of the end face of the sleeve 25 is larger, the end face area is larger, which allows for more uniform stress distribution on the flexible ring 22, preventing damage due to excessive localized stress.
[0041] Sleeve 25 can be a sleeve with a constant cross-section or a sleeve with a variable cross-section. Figure 3 In the illustrated embodiment, the radial width L1 of the end face of the sleeve 25 that contacts the flexible ring 22 is greater than the radial width L2 of the end face of the sleeve 25 that contacts the inner bushing 23. That is, the cross-sectional area of the end of the sleeve 25 that contacts the inner bushing 23 is larger, and the cross-sectional area of the end that contacts the inner bushing 23 is smaller. The material of the sleeve 25 is not limited, including but not limited to metal.
[0042] In one embodiment, such as Figure 3 and Figure 5 As shown, the outer surface of the outer bushing 24 has a recess 241 for hand gripping, which facilitates the assembly and disassembly of the knife assembly 20. The step 240 is located above the recess 241. This arrangement offsets the recess 241 on the outer surface from the step 240 on the inner surface along the knife shaft axis, thus preventing the outer bushing 24 from having a thinner wall at the step 240 and reducing the risk of cracking. Furthermore, this allows the flexible ring 22 to be closer to the top of the knife shaft 10, preventing more food from flowing into the outer bushing 24 from the top of the knife shaft 10, resulting in a better seal.
[0043] exist Figure 3 and Figure 5 In the embodiment shown, the flexible ring 22 is configured as a variable cross-section structure, with a small inner ring thickness and a large outer ring thickness. The inner ring of the flexible ring 22 is used to contact the cutter shaft 10. This facilitates a larger deformation when the inner ring is in interference fit with the cutter shaft 10, making disassembly and assembly easier.
[0044] The axial dimension of sleeve 25 is not limited. Figure 3 and Figure 4In the illustrated embodiment, the sleeve 25 can be configured as a cylindrical structure with a large axial dimension. Specifically, the end of the sleeve 25 that contacts the flexible ring 22 is located above the recess 241, and the end that contacts the inner bushing 23 is located below the recess 241. This allows the sleeve 25 to have a large axial dimension, thereby correspondingly reducing the axial dimension of the inner bushing 23.
[0045] exist Figure 5 and Figure 6 In the illustrated embodiment, the sleeve 25 can be configured as a sheet-like structure with a small axial dimension. Specifically, the end of the sleeve 25 that contacts the flexible ring 22 is located above the recess 241, and the end that contacts the inner bushing 23 is also located above the recess 241. This facilitates the machining of the sleeve 25, but requires a corresponding increase in the axial dimension of the inner bushing 23.
[0046] In one embodiment, the inner bushing 23 is drive-connected to the cutter shaft 10. Since the inner bushing 23 is closer to the cutter shaft 10, it is more convenient to transmit power to the inner bushing 23 through the cutter shaft 10. For example, the cutter shaft 10 can be configured as a non-circular shaft, including but not limited to a square shaft, thus achieving circumferential power transmission. In this embodiment, as... Figure 2 As shown, the cutter shaft 10 has multiple spaced protrusions 11, which deflect circumferentially along the cutter shaft to form a spiral structure. The hollow part of the inner bushing 23 has a recess that mates with each protrusion 11. Rotation of the cutter shaft 10 can drive the inner bushing 23 to rotate, thereby driving the cutter assembly 20 to rotate.
[0047] It should be noted that the downward deflection direction of the protrusion 11 is set opposite to the rotation direction of the cutter assembly 20. In this way, the protrusion 11 restricts the cutter assembly 20 downward, preventing the cutter assembly 20 from axially disengaging from the rotating shaft 10 even during high-speed rotation.
[0048] In one embodiment, such as Figures 1 to 6 As shown, the cutter assembly 20 further includes an anti-slip pad 26 sleeved on the cutter shaft 10. The anti-slip pad 26 is clamped and fixed between the outer bushing 23 and the inner bushing 24 by the connecting force between the inner bushing 23 and the outer bushing 24 in the axial direction of the cutter shaft. The anti-slip pad 26 includes an anti-slip surface 260 with recesses (see reference). Figure 2 The anti-slip surface 260 contacts the blade 21. This design, with its relatively rough surface, increases the resistance to relative rotation between the anti-slip pad 26 and the blade 21, making the blade assembly 20 structure less prone to disassembly and ensuring the stability and robustness of the entire blade assembly 20 structure after assembly.
[0049] In this embodiment, as Figure 2As shown, the anti-slip surface 260 has multiple strip-shaped recesses, which can be evenly distributed along the circumference, but are not limited to this.
[0050] Please refer to Figure 7 , Figure 7 This is an exploded view of a food processor 200 shown in an exemplary embodiment of this application.
[0051] This application also provides a food processor 200, which includes a main unit 201 and a cup assembly 202 assembled on the main unit 201. The assembly method includes, but is not limited to, a detachable method.
[0052] The main unit 201 includes a housing and a motor housed within the housing. The motor shaft extends out of the housing and is connected to the cutter shaft 10 for transmission, driving the cutter shaft 10 to rotate. The cutter shaft 10 is rotatably mounted on the cutter head 30 (reference). Figure 1 and Figure 2 The blade 30 can be a heating plate. The cup assembly 202 includes a cup body 2020, a lid 2021 covering the cup body 2020, and a detachable blade assembly 100. The cup body 2020 has a cup cavity, and the blade 30 of the detachable blade assembly 100 can serve as the bottom of the cup body 2020, i.e., the bottom of the cup cavity. The blade assembly 20 is located inside the cup cavity of the cup body 2020 and is used to stir and break up the food inside the cup cavity. Because the blade assembly 20 is detachable from the blade shaft 10, it is easier to clean the cup body and the blade assembly 20.
[0053] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.
Claims
1. A detachable blade assembly, characterized in that, include: Cutter shaft (10); The cutter assembly (20) is detachably connected to the cutter shaft (10). The cutter assembly (20) includes a blade (21), a flexible ring (22) made of flexible material, an inner bushing (23) and an outer bushing (24) sleeved on the cutter shaft (10). The outer bushing (24) is sleeved on the outside of the inner bushing (23). The blade (21) and the flexible ring (22) are clamped and fixed between the inner bushing (23) and the outer bushing (24) by the connecting force of the inner bushing (23) and the outer bushing (24) along the axial direction of the cutter shaft. The flexible ring (22) is also interference-fitted with the cutter shaft (10).
2. The detachable blade assembly according to claim 1, characterized in that, The inner bushing (23) is threadedly connected to the outer bushing (24).
3. The detachable blade assembly according to claim 1, characterized in that, The inner surface of the outer bushing (24) is provided with a step (240), and the flexible ring (22) is pressed onto the step (240) by the inner bushing (23).
4. The detachable blade assembly according to claim 3, characterized in that, The outer surface of the outer bushing (24) is provided with a recess (241) for human hand gripping, the step (240) is provided below the recess (241), and the inner bushing (23) is connected to the lower end of the outer bushing (24).
5. The detachable blade assembly according to claim 3, characterized in that, The cutter assembly (20) further includes a sleeve (25) sleeved on the outside of the cutter shaft (10) and located inside the outer bushing (24). One end of the sleeve (25) along the axial direction of the cutter shaft abuts against the flexible ring (22), and the other end along the axial direction of the cutter shaft abuts against the inner bushing (23).
6. The detachable blade assembly according to claim 5, characterized in that, The radial width of the end face of the sleeve (25) that contacts the flexible ring (22) is greater than the radial width of the end face of the inner bushing (23) that contacts the sleeve (25).
7. The detachable blade assembly according to claim 5, characterized in that, The outer surface of the outer bushing (24) is provided with a recess (241) for human hand gripping, and the step (240) is provided above the recess (241).
8. The detachable blade assembly according to claim 7, characterized in that, The end of the sleeve (25) that contacts the flexible ring (22) is located above the recess (241), and the end that contacts the inner bushing (23) is located below the recess (241); or The end of the sleeve (25) that contacts the flexible ring (22) is located above the recess (241), and the end that contacts the inner bushing (23) is also located above the recess (241).
9. The detachable blade assembly according to any one of claims 1 to 7, characterized in that, The inner bushing (23) is connected to the cutter shaft (10) in a driving connection; and / or The blade assembly (20) further includes an anti-slip pad (26), which is sleeved on the blade shaft (10) and is clamped and fixed between the outer bushing (24) and the inner bushing (23) by the axial connection force between the inner bushing (23) and the outer bushing (24). The anti-slip pad (26) includes an anti-slip surface (260) with a recess, which contacts the blade (21).
10. A food processor, characterized in that, include: The main unit (201) includes a housing and a motor shaft extending out of the housing; A cup assembly (202) includes a cup body (2020), a cutter disc (30), and a detachable cutter assembly (100) as described in any one of claims 1 to 9. The cup body (2020) has a cup cavity, the cutter disc (30) is formed as the bottom of the cup body (2020), the cutter shaft (10) is rotatably mounted on the cutter disc (30), the cutter assembly (20) is disposed in the cup cavity, and the motor shaft is engaged with the cutter shaft (10).