A bean grinder and coffee maker

Abstract

The application discloses a coffee grinder and a coffee machine. The coffee grinder comprises a shell with a containing cavity, a driving grinding part assembled in the containing cavity, a driven grinding part sleeved on the driving grinding part, and a grinding gap formed between the driving grinding part and the driven grinding part, and an outer ring acting on the driven grinding part to drive the driven grinding part to move up and down relative to the driving grinding part to adjust the grinding gap. A fixing assembly is arranged between the driven grinding part and the outer ring. In the application, the fixing assembly is abutted against the outer ring to drive the fixing assembly to provide a pre-tightening force away from the driven grinding part to the outer ring, so that the outer ring is prevented from acting on the driven grinding part due to vibration in the grinding process or reaction force of materials, the driven grinding part is prevented from moving, the stability of the grinding gap is effectively maintained, the coffee powder ground in the same batch is uniform in thickness, the consistency of the grinding effect is ensured, and the use experience of consumers is effectively improved.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and more particularly to a coffee grinder and coffee machine. Background Technology

[0002] The coffee grinder of a coffee machine grinds coffee beans into coffee powder for brewing coffee. The grinder is usually equipped with an adjustment mechanism to adjust the gap between the grinding wheel and the burr, thereby obtaining coffee powder of different coarseness.

[0003] As shown in the patent (CN222149835U), existing first-generation flagship coffee machines use an outer retaining ring to drive the fixed blade to move up and down, thereby changing the gap between the fixed blade and the active blade, and thus adjusting the grind size to meet different extraction needs. However, this technical solution has obvious design flaws.

[0004] Specifically, during the grinding process, the outer grinding ring is prone to displacement due to the high-frequency vibration and the reaction force generated by the crushing of the coffee material. This instability directly causes changes in the gap between the moving grinding wheel and the grinding disc, resulting in uneven coarseness of coffee powder from the same batch. This fluctuation in grinding precision severely affects the extraction effect of the coffee, ultimately impacting its flavor and quality, and leading to a significantly negative user experience. Utility Model Content

[0005] In order to overcome at least one of the defects described in the prior art, this application provides a grinding device that can prevent the outer ring from being displaced upward due to vibration during the grinding process or the reaction force of the material, thereby ensuring the consistency of the grinding effect.

[0006] A coffee grinding device according to an embodiment of this application includes: a housing having a receiving cavity; an active grinding member assembled in the receiving cavity; a driven grinding member sleeved on the active grinding member, with a grinding gap formed between the driven grinding member and the active grinding member; an outer retaining ring acting on the driven grinding member to drive the driven grinding member to move up and down relative to the active grinding member, thereby adjusting the grinding gap; and a fixing component disposed between the driven grinding member and the outer retaining ring to provide a preload force to the outer retaining ring away from the driven grinding member.

[0007] In this coffee grinding device, the fixing component abuts against the outer retaining ring, driving the fixing component to provide a pre-tightening force to the outer retaining ring away from the driven grinding member. This prevents the outer retaining ring from being affected by vibrations during the grinding process or the reaction force of the material and thus acting on the driven grinding member. Consequently, the outer retaining ring avoids driving the driven grinding member to move relative to the active grinding member, effectively maintaining the stability of the grinding gap. This results in coffee powder from the same batch having a uniform coarseness, ensuring consistent grinding effect and effectively improving the consumer user experience.

[0008] According to some embodiments of this application, the inner wall of the outer retaining ring is provided with an abutting portion, which abuts against the fixing component.

[0009] According to some embodiments of this application, the lower end of the driven grinding member is provided with a fixing post, and the fixing component is fixedly connected to the fixing post.

[0010] According to some embodiments of this application, the active grinding component includes a drive shaft and a moving grinding wheel, the moving grinding wheel being fixedly connected to the drive shaft; the driven grinding component includes a grinding disc, the grinding disc being sleeved on the moving grinding wheel, and the grinding gap being formed between the grinding disc and the moving grinding wheel.

[0011] According to some embodiments of this application, the fixing component includes a metal retaining ring, which is fixed to the lower end of the driven grinding member, and the upper end of the outer retaining ring abuts against the metal retaining ring.

[0012] According to some embodiments of this application, an elastic element is also included, which abuts between the housing and the driven grinding member for providing a preload force to the driven grinding member toward the active grinding member.

[0013] According to some embodiments of this application, the receiving cavity is equipped with a grinding body, the grinding body is provided with a first groove corresponding to the elastic element, and the driven grinding element is provided with a second groove corresponding to the elastic element, the first groove and the second groove being disposed opposite to each other.

[0014] According to some embodiments of this application, the outer retaining ring is threadedly connected to the outer casing.

[0015] According to some embodiments of this application, the pitch of the thread is 2-2.5 mm.

[0016] Based on the same inventive concept, this application also proposes a coffee machine, including: the bean grinding device as described above.

[0017] In summary, the coffee grinding device provided in this application has the following technical advantages:

[0018] By abutting against the outer retaining ring, the fixing component is driven to provide a pre-tightening force to the outer retaining ring away from the driven grinding member. This prevents the outer retaining ring from being affected by vibrations during the grinding process or the reaction force of the material, thus avoiding the outer retaining ring from driving the driven grinding member to move relative to the active grinding member. This effectively maintains the stability of the grinding gap, ensuring that the coffee powder ground in the same batch has a uniform coarseness, ensuring the consistency of the grinding effect, and effectively improving the consumer user experience. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the bean grinding device according to an embodiment of this application;

[0020] Figure 2 This is a cross-sectional view of a coffee grinding device according to an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the structure of the driven grinding member according to an embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the structure of the outer retaining ring according to an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the assembly of the fixing components according to an embodiment of this application.

[0024] The meanings of the reference numerals in the attached figures are as follows:

[0025] 1. Outer shell; 11. Receiving cavity; 12. Grinding body; 13. First slot; 2. Active grinding component; 21. Drive shaft; 22. Moving grinding wheel; 3. Driven grinding component; 31. Grinding disc; 32. Fixing post; 33. Second slot; 4. Outer retaining ring; 41. Abutting part; 5. Fixing assembly; 51. Metal fixing ring; 6. Elastic component. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which 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.

[0029] See Figure 1 and Figure 2 This application discloses a coffee grinding device. The coffee grinding device includes a housing 1, an active grinding element 2, a driven grinding element 3, an outer retaining ring 4, and a fixing component 5. In some embodiments, the housing 1 has a receiving cavity 11; the active grinding element 2 is assembled in the receiving cavity 11; the driven grinding element 3 is disposed at the upper end of the active grinding element 2, and a grinding gap is formed between the driven grinding element 3 and the active grinding element 2; the outer retaining ring 4 acts on the driven grinding element 3 to drive the driven grinding element 3 to move up and down relative to the active grinding element 2 to adjust the grinding gap; the fixing component 5 is disposed between the driven grinding element 3 and the outer retaining ring 4 to apply a downward preload to the outer retaining ring 4. Preferably, by abutting against the outer retaining ring 4, the fixing component 5 is driven to provide a pre-tightening force to the outer retaining ring 4 away from the driven grinding member 3, preventing the outer retaining ring 4 from being affected by vibration during the grinding process or the reaction force of the material and thus acting on the driven grinding member 3. This avoids the outer retaining ring 4 driving the driven grinding member 3 to move relative to the active grinding member 2, effectively maintaining the stability of the grinding gap, so that the coffee powder ground in the same batch has a uniform coarseness, ensuring the consistency of the grinding effect, and effectively improving the consumer user experience.

[0030] See Figure 1 and Figure 2In some embodiments, the active grinding member 2 includes a drive shaft 21 and a moving grinding wheel 22, the moving grinding wheel 22 being fixedly connected to the drive shaft 21; the driven grinding member 3 includes a grinding disc 31, the grinding disc 31 being sleeved on the moving grinding wheel 22, and the grinding gap being formed between the grinding disc 31 and the moving grinding wheel 22. Optionally, the grinding disc 31 has a through-grinding chamber in the middle. The grinding disc 31 is fitted onto the moving grinding wheel 22 through the grinding chamber. During grinding, the material enters the grinding chamber from the upper opening. Under the combined action of gravity and the centrifugal force of the rotating moving grinding wheel 22, it enters the grinding gap formed between the grinding disc 31 and the moving grinding wheel 22 for grinding. To prevent the outer retaining ring 4 from axial displacement due to high-frequency vibration and material crushing reaction force, in this application, the fixing component 5 abuts against the outer retaining ring 4, driving the fixing component 5 to provide a pre-tightening force to the outer retaining ring 4 away from the driven grinding member 3. This prevents the outer retaining ring 4 from being affected by the vibration of the grinding process or the reaction force of the material and acting on the driven grinding member 3, thereby avoiding the outer retaining ring 4 from driving the driven grinding member 3 to move relative to the active grinding member 2, effectively maintaining the stability of the grinding gap, ensuring the consistency of the grinding effect, and effectively improving the user experience.

[0031] See Figure 1 , Figure 2 and Figure 5 In some embodiments, the fixing component 5 includes a metal fixing ring 51, which is fixed to the lower end of the driven grinding member 3, and the upper end of the outer retaining ring 4 abuts against the metal fixing ring 51. Preferably, the metal fixing ring 51, made of metal, has high rigidity, which blocks the transmission of working vibration of the driven grinding member 3, and can construct a closed path of "metal fixing ring 51-outer retaining ring 4-driven grinding member 3-metal fixing ring 51". The metal fixing ring 51 provides a preload force away from the driven grinding member 3 to the outer retaining ring 4, preventing the outer retaining ring 4 from being affected by the vibration of the grinding process or the reaction force of the material and acting on the driven grinding member 3. This avoids the outer retaining ring 4 driving the driven grinding member 3 to move relative to the active grinding member 2, ensuring that the driven grinding member 3 stably maintains its corresponding position, so that the metal fixing ring 51 fixed to the lower end of the driven grinding member 3 can continuously provide a preload force away from the driven grinding member 3 to the outer retaining ring 4.

[0032] See Figure 1 , Figure 2 and Figure 4In some embodiments, the inner wall of the outer retaining ring 4 is provided with an abutment portion 41, which abuts against the fixing component 5. Preferably, the abutment portion 41, which is circumferentially disposed on the outer retaining ring 4, serves as the direct contact surface between the outer retaining ring 4 and the fixing component 5, thereby uniformly transmitting the preload applied by the fixing component 5 to the overall structure of the outer retaining ring 4, ensuring uniform pressure distribution, avoiding deformation caused by local stress concentration, and comprehensively counteracting the tendency of the outer retaining ring 4 to shift due to vibration or the reaction force of the material during the grinding process. Optionally, the abutment portion 41 is a top ring structure circumferentially disposed on the inner wall of the outer retaining ring 4.

[0033] See Figure 1 , Figure 2 and Figure 3 In some embodiments, a fixing post 32 is provided at the lower end of the driven grinding member 3, and the fixing component 5 is fixedly connected to the fixing post 32. Optionally, the fixing can be a snap-fit ​​connection, bolt connection, threaded connection, or other connection methods. Preferably, the fixing post 32 has a screw hole, and the fixing component 5 is fixedly assembled to the lower end of the driven grinding member 3 by fasteners such as bolts / screws, so that the driven grinding member 3 and the fixing component 5 are connected into a stable integral structure. In this way, when the outer retaining ring 4 acts on the driven grinding member 3 and the driven grinding member 3 is adjusted to move to the corresponding position, the metal fixing ring 51 fixed to the lower end of the driven grinding member 3 can effectively provide a pre-tightening force away from the driven grinding member 3 to the outer retaining ring 4, preventing the outer retaining ring 4 from acting on the driven grinding member 3 due to vibration during the grinding process or the reaction force of the material, thereby preventing the outer retaining ring 4 from driving the driven grinding member 3 to move relative to the driving grinding member 2.

[0034] See Figure 1 and Figure 2 In some embodiments, an elastic element 6 is further included, which abuts between the housing 1 and the driven grinding member 3, for providing a preload force to the driven grinding member 3 toward the active grinding member 2. Preferably, by abutting the elastic element 6 between the housing 1 and the driven grinding member 3, the elastic element 6 is driven to provide a preload force to the driven grinding member 3 toward the active grinding member 2, thereby counteracting the reaction force during material crushing. In particular, when a hard object enters the grinding gap, the preload force provided by the elastic element 6 counteracts the instantaneous impact of the hard object, improving the stability of the grinding gap.

[0035] See Figure 1 and Figure 2In some embodiments, the receiving cavity 11 is fitted with a grinding body 12, the grinding body 12 is provided with a first groove 13 corresponding to the elastic member 6, and the driven grinding member 3 is provided with a second groove 33 corresponding to the elastic member 6, the first groove 13 and the second groove 33 being arranged opposite to each other. Preferably, the elastic member 6 is fixed by the oppositely arranged first groove 13 and second groove 33, so that both ends of the elastic member 6 are fixed at the same time, preventing the elastic component from deviating under force, and ensuring that the elastic force of the elastic member 6 effectively acts on the driven grinding member 3.

[0036] See Figure 2 In some embodiments, the outer retaining ring 4 is threadedly connected to the outer casing 1. Preferably, during the grinding operation, the threaded structure between the outer retaining ring 4 and the outer casing 1 increases the friction between them, effectively counteracting the upward displacement of the outer retaining ring 4 caused by vibration or the reaction force of the material during the grinding process. Furthermore, under the preload applied by the fixing component 5, the threaded friction between the outer retaining ring 4 and the outer casing 1 is further increased, enabling a more stable connection between them and effectively reducing the impact of vibration or the reaction force of the material during the grinding process on the outer retaining ring 4.

[0037] Optionally, the outer retaining ring 4 abuts against the grinding disc 31. Thus, before the grinding operation, the grinding disc 31 can be moved up and down relative to the moving grinding wheel 22 by the up and down movement of the outer retaining ring 4, which is threaded to the housing, during rotation, so as to adjust the grinding gap. Preferably, the thread pitch is 2-2.5mm. Thus, the vertical movement distance generated when the outer retaining ring 4, which is threaded to the housing, rotates one revolution is 2-2.5mm. Preferably, the thread pitch is 2.5mm. In this embodiment, when it is necessary to increase the grinding gap, the outer retaining ring 4 is driven to rotate clockwise, which drives the grinding disc 31 to move upward relative to the moving grinding wheel 22. At the same time, the metal fixing ring 51 moves upward synchronously with the grinding disc 31. Correspondingly, when it is necessary to decrease the grinding gap, the outer retaining ring 4 is driven to rotate counterclockwise, which drives the grinding disc 31 to move downward relative to the moving grinding wheel 22. At the same time, the metal fixing ring 51 moves downward synchronously with the grinding disc 31.

[0038] In some embodiments, a coffee machine includes: a coffee grinding device as described above.

[0039] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In some embodiments, before the grinding operation, the outer retaining ring 4, which is threaded to the housing, moves up and down during rotation, causing the grinding disc 31 to move up and down relative to the moving grinding wheel 22, thereby adjusting the grinding gap. During the grinding operation, the metal retaining ring 51 blocks the transmission of working vibration of the grinding disc 31 and can construct a closed path of "metal retaining ring 51 - outer retaining ring 4 - driven grinding element 3 - metal retaining ring 51". The metal retaining ring 51 provides a preload force to the outer retaining ring 4 away from the driven grinding element 3, preventing the outer retaining ring 4 from being affected by the vibration of the grinding process or the reaction force of the material and thus acting on the grinding disc 3. The driven grinding element 3 is described above, thereby preventing the outer retaining ring 4 from driving the driven grinding element 3 to move relative to the active grinding element 2. This ensures that the grinding disc 31 maintains a stable position, and the metal fixing ring 51 fixed to the lower end of the grinding disc 31 can provide a pre-tightening force to the outer retaining ring 4 away from the driven grinding element 3. This prevents the outer retaining ring 4 from being affected by vibration during the grinding process or the reaction force of the material and thus acting on the driven grinding element 3. This effectively maintains the stability of the grinding gap, ensures the consistency of the grinding effect, and effectively improves the user experience.

[0040] 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 grinding device, characterized in that, include: The outer casing (1) has a receiving cavity (11); An active grinding component (2) is assembled in the receiving cavity (11); A driven grinding member (3) is sleeved on the active grinding member (2), and a grinding gap is formed between the driven grinding member (3) and the active grinding member (2); Outer retaining ring (4), the outer retaining ring (4) acts on the driven grinding member (3) to drive the driven grinding member (3) to move up and down relative to the active grinding member (2) to adjust the grinding gap; A fixing component (5) is disposed between the driven grinding member (3) and the outer retaining ring (4) for providing a preload force to the outer retaining ring (4) away from the driven grinding member (3).

2. The grinding device according to claim 1, characterized in that: The inner wall of the outer retaining ring (4) is provided with an abutment portion (41), which abuts against the fixing component (5).

3. The coffee grinding device according to claim 1, characterized in that: The lower end of the driven grinding part (3) is provided with a fixing post (32), and the fixing component (5) is fixed to the fixing post (32).

4. The coffee grinding device according to claim 1, characterized in that: The active grinding component (2) includes a drive shaft (21) and a moving grinding wheel (22), wherein the moving grinding wheel (22) is fixedly connected to the drive shaft (21); The driven grinding component (3) includes a grinding disc (31), which is sleeved on the moving grinding wheel (22), and the grinding gap is formed between the grinding disc (31) and the moving grinding wheel (22).

5. The coffee grinding apparatus according to any one of claims 1-4, characterized in that: The fixing component (5) includes a metal retaining ring (51), which is fixed to the lower end of the driven grinding member (3), and the upper end of the outer retaining ring (4) abuts against the metal retaining ring (51).

6. The coffee grinding apparatus according to any one of claims 1-4, characterized in that: It also includes an elastic element (6) that abuts between the housing (1) and the driven grinding member (3) to provide a preload force to the driven grinding member (3) toward the active grinding member (2).

7. The grinding device according to claim 6, characterized in that: The receiving cavity (11) is equipped with a grinding body (12), the grinding body (12) is provided with a first slot (13) corresponding to the elastic element (6), and the driven grinding element (3) is provided with a second slot (33) corresponding to the elastic element (6). The first slot (13) and the second slot (33) are arranged opposite to each other.

8. The coffee grinding apparatus according to any one of claims 1-4, characterized in that: The outer retaining ring (4) is threadedly connected to the outer casing (1).

9. The grinding device according to claim 8, characterized in that: The thread pitch is 2-2.5mm.

10. A coffee machine, characterized in that, include: The bean grinding apparatus as described in any one of claims 1-9.

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