Anti-stuck bean grinder and coffee machine
By isolating the elastic component in the grinding chamber of the coffee grinder and using the outer retaining ring to drive the grinding disc, the problem of coffee beans getting stuck caused by the exposed spring is solved, achieving a springless, anti-catch grinding effect and improving ease of use and cleanliness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEAR ELECTRICAL APPLIANCE CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-07-10
AI Technical Summary
In existing coffee machine grinding devices, the springs are directly exposed to the grinding path, which makes coffee beans prone to getting stuck during the grinding process, affecting the feeding and reducing the ease of use.
The elastic component is placed between the outer shell and the assembly part. The grinding disc is moved by the outer retaining ring, which isolates the elastic component in the grinding chamber and avoids the spring being exposed, thus creating a springless anti-jamming grinding system.
To prevent coffee beans from getting stuck in the spring's spiral gap during grinding, ensuring smooth feeding, improving ease of use, reducing cleaning difficulty, and enabling precise adjustment of grinding fineness.
Smart Images
Figure CN224474329U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of household appliance technology, and in particular to a coffee grinder and coffee machine that prevents coffee beans from jamming. Background Technology
[0002] A coffee machine's grinding unit grinds coffee beans into the powder needed for brewing. This grinding unit typically includes an adjustment mechanism to change the gap between the moving grinding wheel and the burr, thus obtaining coffee powder of different coarseness. Existing adjustment mechanisms, such as those shown in patent (CN213046600U), use a spring to apply a restoring force. When the adjustment knob is turned out, the spring pushes the first grinding wheel (the moving grinding wheel) downwards along the drive shaft, thereby adjusting the gap between it and the second grinding wheel (the burr). However, this technical solution has revealed some significant drawbacks in practical applications. Specifically, because the spring is directly exposed to the grinding path / grinding chamber, coffee beans may get stuck in the spring's helical gap during grinding, causing interruptions in the coffee feed. Users need to frequently disassemble the unit to clean the blockages, severely impacting ease of use. Utility Model Content
[0003] In order to overcome at least one of the defects described in the prior art, this application provides a bean grinding device that prevents bean jamming, thereby isolating the elastic component in the grinding chamber and constructing a bean-jamming-proof grinding system without exposed springs.
[0004] A bean grinding device for preventing bean jamming according to an embodiment of this application includes: a housing; a grinding disc including a grinding part and an assembly part, the grinding part having a grinding cavity, and the assembly part being disposed on the outside of the grinding part; a movable grinding wheel disposed in the grinding cavity, and a grinding gap being formed between the movable grinding wheel and the grinding part; an adjusting component acting on the assembly part for driving the grinding disc to move up and down relative to the movable grinding wheel to adjust the grinding gap; and an elastic component disposed between the housing and the assembly part for driving the assembly part to abut against the adjusting component.
[0005] In this anti-catch coffee bean grinding device, by placing the elastic component between the outer shell and the assembly part, the assembly part is driven to abut against the adjustment component, ensuring that the outer retaining ring can drive the grinding disc to move, and isolating the elastic component in the grinding chamber, preventing coffee beans from being stuck by the spring's spiral gap during grinding and interrupting the feeding process, completely avoiding the phenomenon of spring-induced bean jamming in traditional solutions, and constructing an anti-catch coffee bean grinding system without exposed springs.
[0006] According to some embodiments of this application, the outer shell includes a grinding body, which covers the upper end of the grinding chamber, and the elastic component is disposed between the grinding body and the assembly part.
[0007] According to some embodiments of this application, the main body of the bean grinder is rotatably connected to a drive shaft, and the moving grinding wheel is fixedly connected to the drive shaft.
[0008] According to some embodiments of this application, the outer casing further includes a housing with a receiving cavity, the grinding body is assembled at the upper end of the receiving cavity, and the grinding disc is disposed at the lower end of the receiving cavity.
[0009] According to some embodiments of this application, the adjusting assembly includes an outer retaining ring, which is threadedly connected to the lower end of the housing, and the lower end of the mounting portion abuts against the upper end of the outer retaining ring.
[0010] According to some embodiments of this application, the diameter of the moving grinding wheel is arranged in an increasing manner from top to bottom.
[0011] According to some embodiments of this application, the outer shell is provided with a first slot corresponding to the elastic component, and the assembly part is provided with a second slot corresponding to the elastic component, with the first slot and the second slot being disposed opposite to each other.
[0012] According to some embodiments of this application, the elastic component includes a plurality of springs arranged circumferentially between the housing and the assembly.
[0013] According to some embodiments of this application, the lower end of the grinding part is provided with a powder collecting ring, the powder collecting ring having a powder collecting channel, and the powder collecting channel communicating with the grinding chamber.
[0014] Based on the same inventive concept, this application also proposes a coffee machine, including: a coffee grinding device as described above to prevent coffee bean jamming.
[0015] In summary, the anti-jamming grinding device provided in this application has the following technical effects:
[0016] By placing the elastic component between the outer shell and the assembly part, the assembly part is driven to abut against the adjustment component, ensuring that the outer retaining ring can drive the grinding disc to move, and isolating the elastic component in the grinding chamber, preventing coffee beans from being stuck by the spiral gap of the spring during the grinding process and interrupting the feeding, completely avoiding the phenomenon of spring-stuck beans in traditional solutions, and constructing a spring-free anti-stuck bean grinding system. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the anti-jamming bean grinding device according to an embodiment of this application;
[0018] Figure 2 This is a cross-sectional view of the anti-jamming bean grinding device according to an embodiment of this application;
[0019] Figure 3 This is a schematic diagram of the structure of the grinder body according to an embodiment of this application;
[0020] Figure 4 This is a schematic diagram of the structure of the driven grinding assembly according to an embodiment of this application.
[0021] The meanings of the reference numerals in the attached figures are as follows:
[0022] 1. Outer shell; 11. Grinding body; 12. Drive shaft; 13. Fixed plate; 14. Snap ring; 15. Housing; 16. First slot; 2. Grinding disc; 21. Grinding part; 22. Assembly part; 23. Grinding chamber; 24. Second slot; 3. Moving grinding wheel; 4. Adjustment component; 41. Outer retaining ring; 5. Elastic component; 51. Spring; 6. Powder collecting ring; 61. Powder collecting channel. Detailed Implementation
[0023] To better understand and implement this application, the technical solutions in this application will be clearly and completely described below with reference to the accompanying drawings.
[0024] In the description of this application, it should be noted that the terms "upper", "lower", "front", "back", "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 used only for the convenience of describing this application 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 application.
[0025] 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 application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.
[0026] See Figure 1 , Figure 2 , Figure 3 and Figure 4This application discloses a bean grinding device to prevent bean jamming. The bean grinding device includes a housing 1, a grinding disc 2, a movable grinding wheel 3, an adjusting component 4, and an elastic component 5. In some embodiments, the grinding disc 2 includes a grinding section 21 and an assembly section 22. The grinding section 21 has a grinding cavity 23, and the assembly section 22 is disposed on the outer side of the grinding section 21. The movable grinding wheel 3 is disposed in the grinding cavity 23, and a grinding gap is formed between the movable grinding wheel 3 and the grinding section 21. The adjusting component 4 acts on the assembly section 22 to drive the grinding disc 2 to move up and down relative to the movable grinding wheel 3 to adjust the grinding gap. The elastic component 5 is disposed between the housing 1 and the assembly section 22 to drive the assembly section 22 to abut against the adjusting component 4. Preferably, by placing the elastic component 5 between the outer shell 1 and the assembly part 22, the assembly part 22 is driven to abut against the adjustment component 4, ensuring that the outer retaining ring can drive the grinding disc 2 to move, and isolating the elastic component 5 in the grinding chamber 23, preventing coffee beans from being stuck by the spiral gap of the spring 51 during the grinding process and interrupting the feeding, completely avoiding the phenomenon of the spring 51 jamming beans in the traditional solution, and constructing an anti-catch grinding system without the spring 51 exposed.
[0027] See Figure 1 , Figure 2 and Figure 3 In some embodiments, the outer casing 1 includes a grinding body 11, which covers the upper end of the grinding chamber 23. The elastic component 5 is disposed between the grinding body 11 and the assembly part 22. Preferably, by covering the upper end of the grinding chamber 23 with the grinding body 11, the grinding chamber 23 is sealed, preventing coffee beans from escaping during grinding. This further prevents coffee beans from entering the elastic component 5 during grinding, thus avoiding bean jamming. This effectively ensures the normal operation of the elastic component 5 and reduces the probability of foreign objects entering the grinding chamber 23. Simultaneously, the elastic component 5, disposed between the vertically arranged grinding body 11 and the assembly part 22, allows the pre-tightening force applied by the elastic component 5 to directly push against the assembly part 22, eliminating intermediate transmission processes, reducing pre-tightening force attenuation / loss, and ensuring that the assembly part 22 is always in contact with the adjusting component 4, thus ensuring that the adjusting component 4 can drive the grinding disc 2 to move up and down.
[0028] See Figure 1 and Figure 2In some embodiments, the grinding body 11 is rotatably connected to a drive shaft 12, and the moving grinding wheel 3 is fixedly connected to the drive shaft 12. Optionally, the grinding body 11 has a through hole in the middle, the drive shaft 12 is fitted into the through hole, and can rotate relative to the grinding body 11; optionally, the upper end of the drive shaft 12 extends upward out of the through hole and is provided with a gear structure or a joint structure, the gear structure or joint structure being used to connect an external drive device (motor, etc.), so that the external drive device can be directly connected to the moving grinding wheel 3 through the drive shaft 12, so as to transmit the rotational power output by the external drive device to the moving grinding wheel 3 through the shortest path and reduce energy loss.
[0029] Furthermore, a fixed disk 13 and a retaining ring 14 are fixedly connected to the drive shaft 12. The upper end of the moving grinding wheel 3 abuts against the retaining ring 14, and the lower end of the moving grinding wheel 3 abuts against the fixed disk 13, so that the fixed disk 13 and the retaining ring 14 form a bidirectional axial clamping on the moving grinding wheel 3, completely eliminating the axial movement of the moving grinding wheel 3 under high-speed rotation or impact of beans.
[0030] See Figure 1 and Figure 2 In some embodiments, the outer casing 1 further includes a housing 15 with a receiving cavity, in which the grinding body 11, the elastic component 5, and the grinding disc 2 are arranged from top to bottom. Preferably, by arranging the grinding body 11, the elastic component 5, and the grinding disc 2 from top to bottom in the receiving cavity, the housing 15 forms a protective barrier, preventing external dust, moisture, or foreign objects from entering the grinding cavity 23 from the top or interfering with the expansion and contraction of the elastic component 5. Simultaneously, the receiving cavity limits the movement of the grinding body 11, the elastic component 5, and the grinding disc 2, preventing structural displacement caused by lateral forces. Furthermore, the axes of the grinding body 11, the grinding disc 2, and the housing 15 are collinear. Furthermore, the top-to-bottom arrangement of the grinding body 11, the elastic component 5, and the grinding disc 2 fully utilizes the height space of the receiving cavity, avoiding excessive device size due to lateral expansion, making it particularly suitable for portable or home coffee machines.
[0031] See Figure 1 and Figure 2In some embodiments, the adjusting component 4 includes an outer retaining ring 41, which is threadedly connected to the lower end of the housing 15. The lower end of the mounting portion 22 abuts against the upper end of the outer retaining ring 41. Preferably, the up-and-down movement of the outer retaining ring threadedly connected to the housing 15 during rotation drives the grinding disc 2 to move up and down relative to the moving grinding wheel 3, thereby adjusting the grinding gap and thus adjusting the coarseness of the ground coffee. At the same time, since the elastic component 5 is disposed between the grinding body 11 and the mounting portion 22, the mounting portion 22 is always abutted against the adjusting component 4, ensuring that the outer retaining ring can synchronously drive the grinding disc 2 to move up and down. This also isolates the elastic component 5 from the grinding chamber 23, preventing coffee beans from being stuck by the spiral gap of the spring 51 during grinding and interrupting the feeding process. This completely avoids the phenomenon of the spring 51 jamming coffee beans in traditional solutions, constructing an anti-jamming grinding system without the spring 51 exposed.
[0032] See Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, the outer shell 1 is provided with a first slot 16 corresponding to the elastic component 5, and the assembly part 22 is provided with a second slot 24 corresponding to the elastic component, with the first slot 16 and the second slot 24 being disposed opposite to each other. Preferably, the elastic component 5 is fixed by the opposing first slot 16 and the second slot 24, so that both ends of the elastic component 5 are fixed at the same time, preventing the elastic component 5 from deviating under force, and ensuring that the elastic component 5 can continuously apply a downward preload to the assembly part 22, so that the assembly part 22 is always stably abutting against the outer retaining ring. In this way, when the outer retaining ring threaded to the shell 15 is rotated, the grinding disc 2 can be effectively driven to move up and down to adjust the grinding gap.
[0033] See Figure 1 and Figure 2 In some embodiments, the elastic component 5 includes a plurality of springs 51 arranged circumferentially between the outer shell 1 and the mounting portion 22. Preferably, by arranging the plurality of springs 51 circumferentially between the outer shell 1 (the grinding body 11) and the mounting portion 22, the elastic component 5 can uniformly apply preload to the grinding disc 2, achieving preload application at multiple points, avoiding uneven force at a single point, and ensuring that the mounting portion 22 of the grinding disc 2 is tightly attached to the outer retaining ring. Thus, when the outer retaining ring is rotated, the grinding disc 2 can be effectively driven to move up and down synchronously, preventing lag in the movement of the grinding disc 2 and making the adjustment more precise.
[0034] See Figure 1and Figure 2 In some embodiments, a powder collecting ring 6 is provided at the lower end of the grinding section 21. The powder collecting ring 6 has a powder collecting channel 61, which communicates with the grinding chamber 23. Preferably, by utilizing the communication between the powder collecting channel 61 and the grinding chamber 23, the ground powder is effectively collected into the powder collecting ring 6 and discharged centrally through the powder collecting channel 61, avoiding disorderly splashing or residue of powder in the grinding chamber 23, thereby improving the powder collection efficiency. Furthermore, after grinding, the powder cleaning work is more focused and convenient. Only the powder collecting ring 6 and the powder collecting channel 61 need to be cleaned, without the need for large-area cleaning, thus reducing the cleaning difficulty and workload.
[0035] Furthermore, the grinding body 11 has a bean feeding channel, which is connected to the grinding chamber 23. Specifically, by setting the bean feeding channel on the grinding body 11, coffee beans are guided to fall precisely into the grinding gap in the direction of vertical gravity. At the same time, the negative pressure effect generated by the rotation of the moving grinding wheel 3 is used to achieve "suction-type" continuous feeding, eliminating the intermittent jamming of the traditional straight-through structure.
[0036] In some embodiments, a coffee machine includes: a coffee grinder as described above to prevent coffee bean jamming.
[0037] See Figure 1 , Figure 2 , Figure 3 and Figure 4In some embodiments, the grinding body 11 has a bean feeding channel, and the grinding chamber 23 of the grinding section 21 is vertically connected. Coffee beans enter the grinding chamber 23 of the grinding section 21 from the bean feeding channel of the grinding body 11. Under the combined action of gravity and the centrifugal force of the rotating grinding wheel 3, they are evenly ground in the grinding gap formed between the grinding disc 2 and the rotating grinding wheel 3. In this embodiment, before the grinding operation, the grinding disc 2 can be moved up and down relative to the rotating grinding wheel 3 by the up and down movement generated by the outer retaining ring threaded to the housing 15 during rotation, so as to adjust the grinding gap. Specifically, when the outer retaining ring moves the grinding disc 2 upward relative to the rotating grinding wheel 3, the grinding gap increases, and the ground powder becomes coarser. Correspondingly, the outer retaining ring moves the grinding disc 2 upward relative to the rotating grinding wheel 3. When the grinding disc 2 moves downward relative to the moving grinding wheel 3, the grinding gap narrows, and the ground powder becomes finer. At the same time, the elastic component 5 includes several springs 51 disposed between the grinding body 11 and the assembly part 22. The springs 51 apply a continuous downward preload to the assembly part 22, so that the assembly part 22 is always stably abutting against the outer retaining ring. This ensures that when the outer retaining ring is rotated, the grinding disc 2 can be effectively driven to move up and down synchronously, preventing the movement of the grinding disc 2 from lagging, making the adjustment more precise. Furthermore, the elastic component 5 is isolated from the grinding chamber 23, preventing coffee beans from being stuck by the spiral gap of the springs 51 during the grinding process and interrupting the feeding. This completely avoids the phenomenon of coffee beans getting stuck by the springs 51 in traditional solutions, and constructs an anti-catch grinding system without the springs 51 exposed.
[0038] The technical means disclosed in this application 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 several improvements and modifications without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.
Claims
1. A coffee grinder that prevents coffee slugging, characterized in that, include: Outer shell (1); The grinding disc (2) includes a grinding part (21) and an assembly part (22). The grinding part (21) has a grinding cavity (23), and the assembly part (22) is disposed on the outside of the grinding part (21). A movable grinding wheel (3) is disposed in the grinding chamber (23), and a grinding gap is formed between the movable grinding wheel (3) and the grinding part (21); Adjustment component (4) acts on the assembly part (22) to drive the grinding disc (2) to move up and down relative to the moving grinding wheel (3) to adjust the grinding gap; An elastic component (5) is disposed between the outer shell (1) and the assembly part (22) for driving the assembly part (22) to abut against the adjustment component (4).
2. The bean grinding device for preventing bean jamming according to claim 1, characterized in that: The outer shell (1) includes a grinding body (11), which covers the upper end of the grinding chamber (23), and the elastic component (5) is disposed between the grinding body (11) and the assembly part (22).
3. The bean grinding device for preventing bean jamming according to claim 2, characterized in that: The grinding body (11) is rotatably connected to a drive shaft (12), and the moving grinding wheel (3) is fixed to the drive shaft (12).
4. The bean grinding device for preventing bean jamming according to claim 3, characterized in that: A fixed disk (13) and a retaining ring (14) are fixedly connected to the drive shaft (12). The upper end of the moving grinding wheel (3) abuts against the retaining ring (14), and the lower end of the moving grinding wheel (3) abuts against the fixed disk (13).
5. The bean grinding device for preventing bean jamming according to claim 2, characterized in that: The outer shell (1) also includes a housing (15) with a receiving cavity, the grinding body (11) is assembled at the upper end of the receiving cavity, and the grinding disc (2) is disposed at the lower end of the receiving cavity.
6. The bean grinding device for preventing bean jamming according to claim 4, characterized in that: The adjustment component (4) includes an outer retaining ring (41), which is threaded to the lower end of the housing (15), and the lower end of the assembly part (22) abuts against the upper end of the outer retaining ring (41).
7. The bean grinding device for preventing bean jamming according to claim 1, characterized in that: The outer shell (1) is provided with a first slot (16) corresponding to the elastic component (5), and the assembly part (22) is provided with a second slot (24) corresponding to the elastic component. The first slot (16) and the second slot (24) are arranged opposite to each other.
8. The bean grinding device for preventing bean jamming according to claim 1, characterized in that: The elastic component (5) includes a plurality of springs (51), which are arranged circumferentially between the outer shell (1) and the assembly part (22).
9. The bean grinding device for preventing bean jamming according to claim 1, characterized in that: The lower end of the grinding part (21) is provided with a powder collecting ring (6), which has a powder collecting channel (61) and is connected to the grinding chamber (23).
10. A coffee machine, characterized in that, include: The bean grinding device for preventing bean jamming as described in any one of claims 1-9.