A bean grinding assembly

Abstract

The utility model discloses a kind of bean grinding assemblies, including outer shell, outer baffle, bean grinding main body, grinding cutter head piece and elastic member. Outer baffle is connected with outer shell one end thread. Bean grinding main body is clamped in accommodating cavity and is far from outer baffle, grinding cutter head piece is connected with bean grinding main body by at least two groups axial guide mechanism, along bean grinding main body axial displacement. Elastic member is set between grinding cutter head piece and bean grinding main body, so that grinding cutter head piece is always in abutment with outer baffle. By rotating outer baffle adjustment its relative position with outer shell, compress elastic member, change the grinding gap between bean grinding main body and grinding cutter head piece. The design is by adjusting outer baffle extrusion gap between grinding cutter head and bean grinding main body, realize the vertical lifting of fixed cutter head, keep the concentric state of fixed cutter head and driving cutter head, ensure the accurate adjustment of bean grinding fineness. At the same time, ensure that fixed cutter head vertical lifting does not run off, improve powder consistency and extraction effect.

Description

Technical Field

[0001] This utility model relates to the field of coffee machine component technology, and in particular to a coffee grinding component. Background Technology

[0002] In the coffee machine industry, the grinding assembly is a key component in the coffee extraction process, and its performance directly affects the taste and quality of the coffee. Existing first-generation flagship coffee machines, as shown in patent (CN222149835U), employ first-generation detachable grinding assemblies. This involves adjusting the outer ring to change the gap between the fixed and active burrs, thereby adjusting the grind size to suit different extraction needs. However, this technology has revealed some significant drawbacks in practical applications.

[0003] Specifically, the first-generation grinding assembly primarily relied on internal threads to move the fixed burr head up and down. While this spiral lifting mechanism allowed for some adjustment of grind size, it inevitably led to misalignment between the fixed and active burrs during the lifting process. Due to the characteristics of the spiral lifting mechanism, the fixed burr head might shift unevenly during movement, resulting in coffee grounds of varying coarseness.

[0004] Due to inconsistent powder extraction, coffee machines cannot guarantee that they will achieve the ideal extraction state every time during the extraction process, thus affecting the overall quality of the coffee. Utility Model Content

[0005] To overcome at least one of the defects described in the prior art, this invention provides a coffee grinding assembly. It can solve the off-axis phenomenon of the fixed burr displacement and improve the uniformity of coffee powder coarseness.

[0006] The technical solution adopted by this utility model to solve its problem is:

[0007] A coffee grinding assembly includes: a housing having a receiving cavity; an outer retaining ring threadedly connected to one end of the housing; a grinding body engaged within the receiving cavity at one end away from the outer retaining ring; a grinding disc connected to the grinding body via at least two sets of axial guide mechanisms to allow the grinding disc to move axially along the grinding body; and an elastic element disposed between the grinding disc and the grinding body to ensure that the grinding disc always abuts against the outer retaining ring. The relative position between the outer retaining ring and the housing is adjusted by rotating the outer retaining ring to compress the elastic element, thereby changing the grinding gap between the grinding body and the grinding disc.

[0008] By adopting the above solution, the gap between the grinding disc and the main body is compressed by adjusting the outer retaining ring, enabling the fixed disc to rise and fall vertically. This design not only maintains the concentricity of the fixed and active discs but also ensures precise adjustment of the grind size. Simultaneously, a limiting and locking structure between the fixed disc and the main body ensures that the fixed disc can only rise and fall vertically without deviation, thereby greatly improving the consistency of the grounds and enhancing the extraction effect.

[0009] Furthermore, the axial guiding mechanism includes: a blade holder, wherein multiple blade holders are provided, and the multiple blade holders are spaced apart along the circumference of the grinding blade; and a main body holder, wherein multiple main body holders are provided, and the multiple main body holders are provided on the side of the grinding body facing the blade holder, and the main body holders correspond one-to-one with the blade holders.

[0010] By adopting the above solution, the grinding disc can maintain concentricity with the drive disc as it moves axially along the grinder body. By adjusting the relative position between the outer retaining ring and the outer casing, the grinding gap between the grinding disc and the grinder body can be precisely controlled. This effectively avoids the misalignment problem between the fixed disc and the drive disc that may occur in traditional screw-lift mechanisms, thus ensuring consistent coffee output during the grinding process.

[0011] Furthermore, between the cutter head slot and the main body slot, one is an outwardly protruding ridged connector, and the other is a connector hole that is inserted into the ridged connector.

[0012] By adopting the above solution, the fit between the ridged connector and the insertion hole achieves precise positioning and accurate axial displacement between the grinding blade assembly and the grinding body. The ridged design increases friction and stability during insertion, ensuring that the grinding blade assembly does not wobble, shift, or rotate during displacement, thus maintaining concentricity with the drive blade assembly.

[0013] Furthermore, a cutter head limiter is provided between at least two adjacent cutter head positions, the cutter head limiter being used to limit the maximum spacing of the grinding gap.

[0014] By adopting the above scheme, the design of the cutter head limit ensures that the grinding cutter head will not move too much during the displacement process, resulting in a small grinding gap and difficulty in powder discharge. It can also prevent structural damage or wear caused by excessive movement.

[0015] Furthermore, the grinding body is provided with a first elastic element groove corresponding to the elastic element, and the grinding disc is provided with a second elastic element groove corresponding to the elastic element, with the first elastic element groove and the second elastic element groove being arranged opposite to each other.

[0016] By adopting the above solution, stable support and positioning are provided for the elastic element. The elastic element can be accurately installed between the two slots, ensuring that its position and function do not change during the grinding process, thereby guaranteeing the stability and reliability of the grinding assembly.

[0017] Furthermore, it also includes a gear feedback mechanism for providing tactile and / or auditory feedback when the outer retaining ring rotates.

[0018] By adopting the above solution, the gear feedback mechanism provides tactile feedback, such as a distinct click or change in resistance, allowing the user to clearly perceive the change in the outer ring with each gear rotation. This instant feedback enhances the user's sense of control and accuracy in operation, making the adjustment of the grinding gap more intuitive and easier.

[0019] Furthermore, the gear feedback mechanism includes: an elastic lever, which is disposed on the side of the outer retaining ring facing the grinding disc; the side of the grinding disc facing the outer retaining ring is provided with an annular gear groove, and the elastic lever abuts against the annular gear groove.

[0020] By adopting the above solution, the elastic lever generates distinct tactile feedback at different positions in the annular gear slot as the outer retaining ring rotates. Each time the lever moves from one gear slot to the next, the user experiences a clear click or change in resistance, thus clearly knowing the current gear position. This significantly improves the accuracy of adjusting the grinding gap. Users no longer need to rely on visual confirmation; they can accurately find and position the desired grinding gear solely through touch, making operation more convenient and efficient.

[0021] Furthermore, the elastic lever includes: a first spring, which is disposed in a first spring groove on the side of the outer retaining ring facing the grinding disc; and a lever, one end of which is fixed to the first spring and the other end of which abuts against the annular stop groove.

[0022] By employing the above solution, when the outer retaining ring rotates, the lever moves according to the change in the slot. Due to the elastic force of the first spring, the lever will generate a noticeable change in resistance or a click sensation during its movement, providing the user with stable tactile feedback. This feedback allows the user to clearly perceive the change in position with each rotation of the outer retaining ring.

[0023] Furthermore, the cutter head positioning includes multiple first positioning components and multiple second positioning components, with the first positioning components and the second positioning components being arranged alternately.

[0024] By adopting the above scheme, the staggered positioning component design is relatively simple, easy to assemble, has a foolproof effect, and is conducive to the alignment of the first elastic groove and the second elastic groove.

[0025] Furthermore, the main body slot includes multiple first slots and multiple second slots, the first slots and the second slots are staggered, and the first slots engage with the first slot component, and the second slots engage with the second slot component.

[0026] By adopting the above solution, the grinding disc is securely installed on the main body, preventing it from loosening or falling off during use. It also maintains high stability and consistency when adjusting its position, thereby improving the grinding accuracy.

[0027] In summary, the coffee grinding assembly provided by this utility model has the following technical effects:

[0028] 1. By rotating the outer retaining ring, its relative position to the outer casing is adjusted, thereby compressing the elastic element and changing the grinding gap between the grinder body and the grinding disc. This design allows for precise adjustment of the grind size, meeting different extraction needs and enabling the coffee machine to produce a wider variety of coffee flavors;

[0029] 2. The grinding blade assembly is connected to the grinding body via at least two sets of axial guide mechanisms, ensuring that the grinding blade assembly can only move along the axial direction of the grinding body. This design effectively avoids the fixed blade from deviating from its axis during lifting and lowering, maintaining the concentricity of the fixed blade and the active blade, thereby improving the uniformity and consistency of grinding.

[0030] 3. A limiting and locking structure is installed between the fixed burr and the grinder body to ensure that the fixed burr can only move vertically without deviation. This design greatly improves the consistency of coffee grounds, ensuring that each extraction achieves the ideal extraction state, thereby improving the overall quality of the coffee;

[0031] 4. Because the grinding assembly can precisely adjust the grind size and maintain the concentricity of the fixed and active burrs, it can produce higher-quality coffee powder. This superior coffee powder releases the aroma and flavor of the coffee better during extraction, thus improving the extraction effect. Attached Figure Description

[0032] Figure 1 This is a partial exploded structural diagram of an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of one side of the grinding disc component according to an embodiment of the present utility model;

[0034] Figure 3 This is a schematic diagram of the outer retaining ring structure according to an embodiment of the present utility model;

[0035] Figure 4This is a schematic diagram of the inner structure of the grinding body in an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the grinding disc component according to an embodiment of the present utility model;

[0037] Figure 6 This is a schematic cross-sectional view of the grinding gap at its finest state according to an embodiment of the present invention;

[0038] Figure 7 This is a schematic cross-sectional view of the grinding gap at its coarsest state according to an embodiment of the present invention.

[0039] The meanings of the reference numerals in the attached drawings are as follows: 1. Outer shell; 11. Receiving cavity; 12. External thread; 2. Outer retaining ring; 21. Internal thread; 3. Grinding body; 31. Body locking position; 311. First locking groove; 312. Second locking groove; 32. First elastic element groove; 4. Grinding disc component; 41. Disc locking position; 411. First locking component; 412. Second locking component; 42. Second elastic element groove; 43. Annular stop groove; 5. Elastic element; 6. Disc limiter; 7. Feedback mechanism; 71. Elastic lever; 711. First spring; 712. Lever; 8. Active disc. Detailed Implementation

[0040] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described and discussed below with reference to the accompanying drawings. Obviously, what is described here is only a part of the examples of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the protection scope of this invention.

[0041] To facilitate understanding of the embodiments of this utility model, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of this utility model.

[0042] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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.

[0043] 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 this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0044] See Figures 1-7 This utility model discloses a bean grinding assembly, including an outer shell 1, an outer retaining ring 2, a bean grinding body 3, a grinding blade 4, and an elastic element 5. The outer shell 1 has a receiving cavity 11, and the outer retaining ring 2 is threadedly connected to one end of the outer shell 1. Preferably, the outer surface of one end of the outer shell 1 is provided with an external thread 12, and the outer retaining ring 2 is provided with an internal thread 21. The grinding body 3 is snapped into the receiving cavity 11 at the end furthest from the outer retaining ring 2. The grinding body 3 has a central shaft hole for mounting the active blade assembly 8. The grinding blade 4 is connected to the grinding body 3 via at least two sets of axial guide mechanisms to allow the grinding blade 4 to move axially along the grinding body 3. The elastic element 5 is positioned between the grinding blade 4 and the grinding body 3 to ensure that the grinding blade 4 always abuts against the outer retaining ring 2. By rotating the outer retaining ring 2, the relative position between the outer retaining ring 2 and the outer shell 1 is adjusted to compress the elastic element 5, thereby changing the grinding gap between the grinding body 3 and the grinding blade 4. Adjusting the outer retaining ring further compresses the gap between the grinding blade and the body, achieving vertical lifting and lowering of the fixed blade. This design not only maintains the concentricity of the fixed blade and the active blade 8 but also ensures precise adjustment of the grinding coarseness. Meanwhile, a limiting and locking structure is provided between the fixed blade disc and the main body to ensure that the fixed blade disc can only move vertically without deviating, thereby greatly improving the consistency of powder output and enhancing the extraction effect.

[0045] It should be noted that the grinding disc component 4 and its internal detailed parts are existing technologies and will not be described in detail here.

[0046] To improve the elastic stability of the elastic element 5, in some embodiments, a first elastic element groove 32 is provided on the grinding body 3 corresponding to the elastic element 5, and a second elastic element groove 42 is provided on the grinding disc 4 corresponding to the elastic element 5. The first elastic element groove 32 and the second elastic element groove 42 are arranged opposite to each other, providing stable support and positioning for the elastic element 5. The elastic element 5 can be accurately installed between the two grooves, ensuring that its position and function do not change during the grinding process, thereby guaranteeing the stability and reliability of the grinding assembly.

[0047] In one specific embodiment, the axial guiding mechanism includes a blade holder 41 and a main body holder 31. Multiple blade holders 41 are provided, spaced apart circumferentially along the grinding blade assembly 4. Multiple main body holders 31 are also provided, located on the side of the grinding body 3 facing the blade holder 41, and each main body holder 31 corresponds to one of the blade holders 41. This ensures that the grinding blade assembly 4 maintains concentricity with the active blade 8 as it moves axially along the grinding body 3. By adjusting the relative position between the outer retaining ring and the outer casing 1, the grinding gap between the grinding blade assembly 4 and the grinding body 3 can be precisely controlled. This effectively avoids the problem of misalignment between the fixed blade and the active blade 8 that may occur in traditional spiral lifting mechanisms, thus ensuring consistent powder output during grinding.

[0048] It should be noted that between the blade holder 41 and the main body holder 31, one is an outwardly protruding ridged connector, and the other is a connector hole that engages with the ridged connector. The engagement of the ridged connector and the connector hole enables precise positioning and accurate axial displacement between the grinding blade 4 and the grinding body 3. The ridged design increases friction and stability during engagement, ensuring that the grinding blade 4 does not wobble, shift, or rotate during displacement, thus maintaining concentricity with the active blade 8. Preferably, the blade holder 41 includes multiple first holders 411 and multiple second holders 412, which are staggered. The staggered holder design is relatively simple, easy to assemble, and has a foolproof effect, which is beneficial for the alignment of the first elastic groove 32 and the second elastic groove 42. The main locking position 31 includes multiple first locking slots 311 and multiple second locking slots 312. The first locking slots 311 and the second locking slots 312 are staggered, and the first locking slots 311 engage with the first locking member 411, and the second locking slots 312 engage with the second locking member 412. In this embodiment 1, the first locking member 411 is a rectangular plate structure, and the second locking member 412 is a columnar structure with edges. The first locking member 411, the second locking member 412, and the second elastic member groove 42 are arranged sequentially and cyclically along the circumference of the grinding disc 4.

[0049] In some embodiments, in order to ensure the safe use of the grinding disc 4, a disc limiter 6 is provided between at least two adjacent disc locking positions 41. The disc limiter 6 is used to limit the maximum spacing of the grinding gap. The design of the disc limiter 6 ensures that the grinding disc 4 will not cause the grinding gap to be too large due to excessive movement during the displacement process, resulting in larger particles. It can also prevent structural damage or wear caused by excessive movement.

[0050] Preferably, in some embodiments, a gear feedback mechanism 7 is also included to provide tactile and / or auditory feedback when the outer retaining ring 2 rotates. The gear feedback mechanism 7 provides tactile feedback, such as a noticeable click or change in resistance, allowing the user to clearly perceive the change in the outer retaining ring 2 with each rotation. This immediate feedback enhances the user's sense of control and accuracy in operation, making the adjustment of the grinding gap more intuitive and easier.

[0051] In this embodiment 1, the gear feedback mechanism 7 includes an elastic lever 71, which is disposed on the side of the outer retaining ring 2 facing the grinding disc 4. The elastic lever 71 includes a first spring 711 and a lever 712. The first spring 711 is disposed in a groove on the side of the outer retaining ring 2 facing the grinding disc 4. One end of the lever 712 is fixed to the first spring 711, and the other end abuts against the annular gear groove 43. The grinding disc 4 is provided with an annular gear groove 43 on the side facing the outer retaining ring 2, and the elastic lever 71 abuts against the annular gear groove 43. As the outer retaining ring 2 rotates, the elastic lever 71 will generate obvious tactile feedback at different positions in the annular gear groove 43. Whenever the lever 712 moves from one gear groove to the next, the user can feel a clear click or change in resistance, thus clearly knowing the current gear position. This greatly improves the accuracy of the user in adjusting the grinding gap. Users can accurately locate and position the desired grinding level solely by touch, eliminating the need for visual confirmation, making operation more convenient and efficient. When the outer retaining ring 2 rotates, the lever 712 moves accordingly. Due to the elastic force of the first spring 711, the lever 712 experiences noticeable changes in resistance or a clicking sensation during movement, providing stable tactile feedback to the user. This feedback allows the user to clearly perceive the changes in the grinding level with each rotation of the outer retaining ring 2.

[0052] The operating steps of this utility model are as follows:

[0053] The grinding body 3 is fixed to the outer shell 1 by means of a snap-fit ​​groove. The elastic element 5 is inserted into the first elastic element groove 32, and then the prismatic connector of the grinding disc 4 is aligned with the connector hole of the grinding body 3 and inserted. The outer retaining ring 2 is screwed into the threaded end of the outer shell 1. Under the force of the elastic element 5, the inside of the outer retaining ring 2 comes into contact with the grinding disc 4.

[0054] Adjustment operation:

[0055] Fine adjustment: Rotate the outer retaining ring 2 clockwise, and the elastic element 5 pushes the grinding disc 4 to move outward with the outer retaining ring 2, thereby reducing the grinding gap between the grinding disc 4 and the active disc 8.

[0056] Coarsening: Rotate the outer retaining ring 2 counterclockwise, the elastic element 5 is squeezed, and the grinding disc 4 moves inward with the outer retaining ring 2, which increases the grinding gap between the grinding disc 4 and the active disc 8.

[0057] Ideally, each 3-5° rotation corresponds to one gear position, and the lever 712 generates feedback once to ensure adjustment accuracy of ±0.05mm.

[0058] In summary, the coffee grinding assembly provided by this utility model has the following technical effects:

[0059] 1. By rotating the outer retaining ring 2, its relative position to the outer casing 1 is adjusted, thereby compressing the elastic element 5 and changing the grinding gap between the grinding body 3 and the grinding disc 4. This design enables precise adjustment of the grind size, meeting different extraction needs and allowing the coffee machine to produce a more diverse range of coffee flavors;

[0060] 2. The grinding disc 4 is connected to the grinding body 3 by at least two sets of axial guide mechanisms, ensuring that the grinding disc 4 can only move along the axial direction of the grinding body 3. This design effectively avoids the fixed disc from deviating from its axis during the lifting process, maintaining the concentricity of the fixed disc and the active disc 8, thereby improving the uniformity and consistency of grinding.

[0061] 3. A limiting and locking structure is installed between the fixed burr and the main grinding body 3 to ensure that the fixed burr can only move vertically without deviation. This design greatly improves the consistency of coffee grounds, ensuring that each extraction achieves the ideal extraction state, thereby improving the overall quality of the coffee;

[0062] 4. Because the grinding assembly can precisely adjust the grind size and maintain the concentricity of the fixed burr and the active burr 8, it can produce higher-quality coffee powder. This higher-quality coffee powder can better release the aroma and flavor of the coffee during extraction, thereby improving the extraction effect.

[0063] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A coffee grinding assembly, characterized in that, include: The outer shell (1) has a receiving cavity (11); Outer retaining ring (2), the outer retaining ring (2) is threaded to one end of the outer shell (1); The grinding body (3) is snapped into the receiving cavity (11) and is located away from the outer retaining ring (2) at one end; The grinding disc (4) is connected to the bean grinder body (3) by at least two sets of axial guide mechanisms so that the grinding disc (4) can be displaced along the axial direction of the bean grinder body (3); An elastic element (5) is disposed between the grinding disc (4) and the grinding body (3) to ensure that the grinding disc (4) always abuts against the outer retaining ring (2); By rotating the outer retaining ring (2), the relative position between the outer retaining ring (2) and the outer shell (1) is adjusted to compress the elastic element (5), thereby changing the grinding gap between the grinding body (3) and the grinding disc (4).

2. The coffee grinding assembly according to claim 1, characterized in that, The axial guide mechanism includes: The tool disc holder (41) is provided in multiple ways, and the multiple tool disc holders (41) are spaced apart along the circumference of the grinding tool disc (4). The main body slot (31) is provided in multiple ways. The multiple main body slots (31) are provided on the side of the grinding body (3) facing the blade slot (41), and the main body slots (31) correspond one-to-one with the blade slots (41).

3. A coffee grinding assembly according to claim 2, characterized in that, Between the cutter head slot (41) and the main body slot (31), one is an outwardly protruding ribbed connector, and the other is a connector hole that is inserted into the ribbed connector.

4. A coffee grinding assembly according to claim 2, characterized in that, At least two adjacent cutter head positions (41) are provided with cutter head limiters (6), which are used to limit the maximum spacing of the grinding gap.

5. A coffee grinding assembly according to claim 1, characterized in that, The grinding body (3) is provided with a first elastic groove (32) corresponding to the elastic element (5), and the grinding disc (4) is provided with a second elastic groove (42) corresponding to the elastic element (5). The first elastic groove (32) and the second elastic groove (42) are arranged opposite to each other.

6. A coffee grinding assembly according to any one of claims 1-5, characterized in that, It also includes a gear feedback mechanism (7) for providing tactile and / or auditory feedback when the outer retaining ring (2) is rotated.

7. A coffee grinding assembly according to claim 6, characterized in that, The gear feedback mechanism (7) includes: An elastic lever (71) is provided on the side of the outer retaining ring (2) facing the grinding disc (4); The grinding disc (4) is provided with an annular stop groove (43) on the side facing the outer retaining ring (2), and the elastic lever (71) abuts against the annular stop groove (43).

8. A coffee grinding assembly according to claim 7, characterized in that, The elastic lever (71) includes: The first spring (711) is disposed in the first spring (711) groove on the side of the outer retaining ring (2) facing the grinding disc (4); A lever (712) is fixed at one end to the first spring (711) and at the other end to the annular stop groove (43).

9. A coffee grinding assembly according to claim 2, characterized in that, The cutter head locking position (41) includes a plurality of first locking components (411) and a plurality of second locking components (412), with the first locking components (411) and the second locking components (412) being arranged alternately.

10. A coffee grinding assembly according to claim 9, characterized in that, The main body slot (31) includes a plurality of first slot slots (311) and a plurality of second slot slots (312). The first slot slots (311) and the second slot slots (312) are staggered, and the first slot slots (311) are engaged with the first slot member (411), and the second slot slots (312) are engaged with the second slot member (412).

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