Bean grinding assembly and coffee machine comprising the same

Abstract

The utility model discloses a coffee grinder and coffee machine comprising same. The coffee grinder comprises: a grinding cylinder provided with a grinding cavity; a transmission shaft arranged in the grinding cavity; a movable grinding wheel transmissionally connected to an output end of the transmission shaft; a static grinding wheel arranged in the grinding cavity, a grinding gap being formed between the static grinding wheel and the movable grinding wheel, the static grinding wheel being movable up and down relative to the movable grinding wheel to adjust the grinding gap; a powder scraping member transmissionally connected to the transmission shaft, the powder scraping member being in contact with a powder outlet side of the static grinding wheel; an elastic structure arranged between the powder scraping member and the transmission shaft; when the static grinding wheel moves upward, the elastic structure is used to drive the powder scraping member to move upward by elastic force, so that the powder scraping member and the powder outlet side of the static grinding wheel remain in contact; when the static grinding wheel moves downward, the powder outlet side of the static grinding wheel pushes the powder scraping member downward, so that the elastic structure is compressed. In this way, the position of the powder scraping member can be automatically adjusted according to the movement of the static grinding wheel through the cooperation of the elastic structure and the powder scraping member, and it is ensured that the powder scraping member can scrape the residual powder on the powder outlet side clean during the grinding process.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a coffee grinding assembly and a coffee machine including the same. Background Technology

[0002] Current coffee machines primarily rely on adjusting the gap between the stationary and moving grinding wheels to control the coarseness of the coffee grounds. To address residual coffee grounds, a scraper is typically included in the grinding assembly to remove them. However, most existing scrapers are fixed and cannot move vertically. When adjusting the coarseness, the stationary grinding wheel moves upward to adjust the grinding gap with the moving wheel. Because the scraper cannot move upward with the stationary grinding wheel, it cannot effectively remove residual coffee grounds from the outlet side of the stationary wheel. This not only causes residual coffee grounds to be shaken onto the drip tray during extraction after the coffee is collected in the funnel, but also results in residual coffee grounds remaining in the grinding assembly for extended periods, leading to expired coffee grounds. When the coffee is ground and extracted again, the expired coffee grounds mix with fresh coffee grounds, affecting the extraction results and reducing the quality of the coffee. Utility Model Content

[0003] In order to overcome at least one of the defects described in the prior art, the present invention provides a grinding assembly and a coffee machine including the same, which aims to enable the scraper to automatically adjust its position according to the movement of the stationary grinding wheel, ensuring that the scraper is always in close contact with the powder outlet side of the stationary grinding wheel during the grinding process, effectively avoiding the generation of residual powder, and improving the quality and taste of coffee extraction.

[0004] The technical solution adopted by this utility model to solve its problem is:

[0005] A coffee grinding assembly includes: a grinding cylinder with a grinding chamber; a drive shaft disposed within the grinding chamber; a movable grinding wheel driven to the output end of the drive shaft; a stationary grinding wheel disposed within the grinding chamber, a grinding gap being formed between the stationary grinding wheel and the movable grinding wheel, the stationary grinding wheel being movable up and down relative to the movable grinding wheel to adjust the grinding gap; a scraper driven to the drive shaft, the scraper contacting the powder outlet side of the stationary grinding wheel; and an elastic structure disposed between the scraper and the drive shaft; when the stationary grinding wheel moves upward, the elastic structure elastically drives the scraper upward to maintain contact between the scraper and the powder outlet side of the stationary grinding wheel; when the stationary grinding wheel moves downward, the powder outlet side of the stationary grinding wheel pushes the scraper downward to compress the elastic structure.

[0006] According to some embodiments of this utility model, the grinding assembly further includes a powder collecting ring connected to the lower side of the stationary grinding wheel. The powder scraper contacts the inner wall of the powder collecting ring and the powder outlet side of the stationary grinding wheel, respectively. When the stationary grinding wheel moves upward, the elastic structure is used to elastically drive the powder scraper to move upward, so that the powder scraper remains in contact with the inner wall of the powder collecting ring and the powder outlet side of the stationary grinding wheel, respectively. When the stationary grinding wheel moves downward, the powder outlet side of the stationary grinding wheel pushes the powder scraper downward and compresses the elastic structure.

[0007] According to some embodiments of the present invention, the elastic structure includes an elastic element and a fixing ring. The fixing ring is connected to the transmission shaft and located below the elastic element. One end of the elastic element abuts against the fixing ring, and the other end of the elastic element abuts against the powder scraper.

[0008] According to some embodiments of this utility model, the fixing ring is provided with a guide channel, the powder scraper and the guide channel are slidably engaged, and the guide channel provides guidance for the up and down movement of the powder scraper.

[0009] According to some embodiments of the present invention, the grinding assembly further includes a fixed disk, which is connected to the lower end of the drive shaft. The powder scraper and the fixing ring are both sleeved on the fixed disk, and the powder scraper can slide up and down relative to the fixed disk.

[0010] According to some embodiments of the present invention, the fixing ring is provided with a connecting cavity, the connecting cavity is recessed and provided with a connecting groove, the lower end of the fixing plate is embedded in the connecting groove, and one end of the elastic member abuts against the connecting cavity.

[0011] According to some embodiments of the present invention, a clearance space is formed between the powder scraper and the fixed disk, and the clearance space allows the powder scraper to move up and down relative to the fixed disk.

[0012] According to some embodiments of the present invention, the powder scraper includes a connecting arm and at least two powder scraping arms, the at least two powder scraping arms being connected to the connecting arm at intervals, and each powder scraping arm being in contact with the inner wall of the powder collecting ring and the powder outlet side of the stationary grinding wheel.

[0013] According to some embodiments of the present invention, the grinding assembly further includes an outer adjusting ring and a decorative ring. The decorative ring is sleeved on the grinding cylinder, and the outer adjusting ring is threadedly connected to the decorative ring. The outer adjusting ring has a pushing wall, and the pushing wall is connected to the stationary grinding wheel. When the outer adjusting ring rotates and moves upward, the pushing wall pushes upward against the stationary grinding wheel.

[0014] In addition, this utility model also includes a coffee machine, which includes the bean grinding assembly described above.

[0015] In summary, the coffee grinding assembly and coffee machine including the present invention have at least the following technical effects:

[0016] On the one hand, through the cooperation of the elastic structure and the scraper, the scraper can automatically adjust its position according to the movement of the stationary grinding wheel, always keeping it close to the powder outlet side of the stationary grinding wheel. This ensures that the scraper cleans the residual powder on the outlet side during the grinding process, avoiding the impact of residual powder on coffee quality. Furthermore, by avoiding the mixing of residual powder and expired coffee powder, the coffee powder extracted each time is fresh, thereby improving the extraction effect and taste of the coffee and providing users with higher quality coffee. On the other hand, this embodiment improves upon the existing grinding components by only adding an elastic structure and adjusting the installation method of the scraper. The structure is simple, easy to implement, and low in cost. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the grinding assembly of this utility model from a first perspective.

[0018] Figure 2 This is a cross-sectional view of the grinding assembly according to an embodiment of the present invention from a second perspective.

[0019] Figure 3 This is an exploded view of the grinding assembly according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the fixing ring according to an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram showing the fixed disk being assembled with the drive shaft according to an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram showing the state in which the powder scraper and elastic element are sleeved on the fixed plate according to an embodiment of the present utility model.

[0023] Figure 7 This is a schematic diagram showing the state of the fixing ring being assembled with the fixing plate according to an embodiment of the present invention;

[0024] Figure 8 This is a three-dimensional structural diagram of the coffee grinding assembly (when inverted) according to an embodiment of the present invention.

[0025] The meanings of the reference numerals in the attached figures are as follows:

[0026] 1. Grinding cylinder; 11. Grinding chamber; 2. Drive shaft; 3. Moving grinding wheel; 31. Slot; 4. Stationary grinding wheel; 41. Powder outlet side; 5. Powder scraper; 51. Powder scraper arm; 52. Connecting arm; 6. Elastic structure; 61. Elastic element; 62. Fixing ring; 621. Guide channel; 622. Connecting cavity; 623. Connecting groove; 7. Powder collecting ring; 8. Fixing disc; 81. Clearance space; 82. Connecting column; 83. Flat part; 9. Outer adjusting ring; 91. Pushing wall; 10. Decorative ring; 20. Power assembly. Detailed Implementation

[0027] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0028] 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.

[0029] 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.

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] Please see Figures 1 to 4 This embodiment discloses a bean grinding assembly, including a grinding cylinder 1, a drive shaft 2, a moving grinding wheel 3, a stationary grinding wheel 4, a scraper 5, and an elastic structure 6. The grinding cylinder 1 has a grinding chamber 11. The drive shaft 2 is disposed in the grinding chamber 11. The moving grinding wheel 3 is driven to the output end of the drive shaft 2. The stationary grinding wheel 4 is disposed in the grinding chamber 11, and a grinding gap is formed between the stationary grinding wheel 4 and the moving grinding wheel 3. The stationary grinding wheel 4 can move up and down relative to the moving grinding wheel 3 to adjust the grinding gap. The scraper 5 is driven to the drive shaft 2, and the scraper 5 is in contact with the powder outlet side 41 of the stationary grinding wheel 4. The elastic structure 6 is disposed between the scraper 5 and the drive shaft 2. When the stationary grinding wheel 4 moves upward, the elastic structure 6 is used to elastically drive the scraper 5 to move upward so that the scraper 5 and the powder outlet side 41 of the stationary grinding wheel 4 remain in contact. When the stationary grinding wheel 4 moves downward, the powder outlet side 41 of the stationary grinding wheel 4 pushes the scraper 5 downward so that the elastic structure 6 is compressed.

[0032] like Figure 2 As shown. Specifically, the input end of the drive shaft 2 is also connected to the power assembly 20. When the power assembly 20 is started, it can drive the drive shaft 2 to rotate. Under the drive of the drive shaft 2, the moving grinding wheel 3 and the powder scraper 5 can rotate synchronously.

[0033] In the grinding assembly disclosed in this embodiment, when the stationary grinding wheel 4 moves upward, the elastic structure 6 drives the scraper 5 to move synchronously under its own elastic force, so that the scraper 5 always maintains close contact with the powder outlet side 41 of the stationary grinding wheel 4; when the stationary grinding wheel 4 moves downward, the powder outlet side 41 of the stationary grinding wheel 4 will push the scraper 5 downward, causing the elastic structure 6 to be compressed, and the scraper 5 moves downward accordingly, but can still maintain contact with the powder outlet side 41 of the stationary grinding wheel 4 under the action of the elastic structure 6. Thus, on the one hand, through the cooperation of the elastic structure 6 and the scraper 5, the scraper 5 can automatically adjust its position according to the movement of the stationary grinding wheel 4, always keeping it close to the powder outlet side 41 of the stationary grinding wheel 4. This ensures that the scraper 5 scrapes away the residual powder on the powder outlet side 41 during the grinding process, avoiding the impact of residual powder on the coffee quality. Furthermore, since the mixing of residual powder and expired coffee powder is avoided, the coffee powder extracted each time is fresh, thereby improving the extraction effect and taste of the coffee and providing users with higher quality coffee. On the other hand, this embodiment improves upon the existing coffee grinding components by only adding the elastic structure 6 and adjusting the installation method of the scraper 5. The structure is simple, easy to implement, and has a low cost.

[0034] like Figure 1 and Figure 2 As shown, preferably, in this embodiment, the grinding assembly further includes a powder collecting ring 7, which is connected to the lower side of the stationary grinding wheel 4. The powder collecting ring 7 collects and releases the coffee powder discharged from the powder outlet side 41 of the stationary grinding wheel 4. During the grinding process, the discharge direction and speed of the coffee powder may change due to various factors. The presence of the powder collecting ring 7 effectively guides the flow of coffee powder and avoids the scattering and waste of coffee powder.

[0035] like Figure 1 and Figure 2As shown, more preferably, in this embodiment, the powder scraper 5 contacts the inner wall of the powder collecting ring 7 and the powder outlet side 41 of the stationary grinding wheel 4, respectively. When the stationary grinding wheel 4 moves upward, the powder collecting ring 7 also moves upward. The elastic structure 6 is used to elastically drive the powder scraper 5 to move upward, so that the powder scraper 5 maintains contact with the inner wall of the powder collecting ring 7 and the powder outlet side 41 of the stationary grinding wheel 4, respectively. When the stationary grinding wheel 4 moves downward, the powder collecting ring 7 also moves downward, and the powder outlet side 41 of the stationary grinding wheel 4 pushes the powder scraper 5 downward and compresses the elastic structure 6. In this way, the close contact between the powder scraper 5 and the inner wall of the powder collecting ring 7 and the powder outlet side 41 of the stationary grinding wheel 4 achieves an all-round, no-dead-angle powder scraping function. Understandably, during the grinding process, coffee powder easily adheres to the powder outlet side 41 of the stationary grinding wheel 4 and the inner wall of the powder collection ring 7. If this residual powder is not removed in time, it will not only affect the quality of subsequent coffee powder but may also cause blockage and wear inside the grinding assembly. In this embodiment, when the stationary grinding wheel 4 moves upward, the elastic structure 6 can elastically drive the scraper 5 to move upward, ensuring that the scraper 5 always maintains close contact with the inner wall of the powder collection ring 7 and the powder outlet side 41 of the stationary grinding wheel 4, effectively scraping off the coffee powder adhering to them. When the stationary grinding wheel 4 moves downward, the powder outlet side 41 of the stationary grinding wheel 4 pushes the scraper 5 downward, compressing the elastic structure 6. However, the scraper 5 can still maintain contact with the two areas under the action of elastic restoring force, continuing to perform the scraping task. This adaptive scraping mechanism can adjust the position of the scraper 5 in real time according to the movement of the stationary grinding wheel 4, always maintaining a highly efficient scraping effect, ensuring the smooth progress of the grinding process, extending the service life of the grinding assembly, and reducing the difficulty and workload of equipment cleaning.

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, preferably, in this embodiment, the elastic structure 6 includes an elastic element 61 and a fixing ring 62. The fixing ring 62 is connected to the transmission shaft 2 and located below the elastic element 61. One end of the elastic element 61 abuts against the fixing ring 62, and the other end of the elastic element 61 abuts against the scraper 5. Thus, on the one hand, by abutting against the fixing ring 62 and the scraper 5 at both ends, the elastic element 61 can form a stable elastic force between the transmission shaft 2 and the scraper 5. This elastic force ensures that the scraper 5 maintains good contact with related components during normal operation, guaranteeing the effectiveness and stability of the scraping work and avoiding problems such as incomplete scraping or scraping dead zones due to poor contact. On the other hand, the connection between the fixing ring 62 and the transmission shaft 2, as well as the abutting action of the elastic element 61 against the scraper 5, form a relatively stable structural system. During equipment operation, this effectively reduces the relative shaking and displacement between the transmission shaft 2 and the scraper 5, improves the structural stability of the entire transmission system and scraping mechanism, reduces the risk of equipment failure due to structural instability, and extends the service life of the equipment.

[0037] like Figure 1 , Figure 3 and Figure 4 As shown, more preferably, in this embodiment, the fixing ring 62 is provided with a guide channel 621, and the powder scraper 5 and the guide channel 621 are slidably engaged. The guide channel 621 provides guidance for the up-and-down movement of the powder scraper 5. In this way, the guide channel 621 provided by the fixing ring 62 and the powder scraper 5 are slidably engaged, providing precise guidance for the up-and-down movement of the powder scraper 5. The existence of the guide channel 621 ensures that the powder scraper 5 always runs along the predetermined trajectory during the movement. Under the guidance of the guide channel 621, the powder scraper 5 can maintain good contact with the powder outlet side 41 of the stationary grinding wheel 4 and the inner sidewall of the powder collecting ring 7, respectively, avoiding inaccurate powder scraping position caused by shaking, offset, etc., thereby ensuring the uniformity and consistency of the powder scraping effect.

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, preferably, in this embodiment, the grinding assembly further includes a fixed disk 8, which is connected to the lower end of the drive shaft 2. The powder scraper 5 and the fixing ring 62 are both fitted onto the fixed disk 8, and the powder scraper 5 can slide up and down relative to the fixed disk 8. This achieves the following technical effects:

[0039] First, the fixed plate 8 is connected to the lower end of the drive shaft 2, providing a stable support base for all components of the coffee grinder assembly. As a key component for power transmission, the stability of the drive shaft 2 directly affects the operating performance of the coffee grinder assembly. The connection between the fixed plate 8 and the drive shaft 2 allows the fixed plate 8 to rotate synchronously with the drive shaft 2, while also providing a reliable mounting position for components such as the powder scraper 5 and the fixing ring 62, reducing the risk of failure caused by component shaking or displacement.

[0040] Secondly, during the grinding process, the scraper 5 is subjected to friction from the coffee powder and elasticity from the elastic structure 6. The presence of the fixed plate 8 provides a stable support surface for the scraper 5, which can effectively disperse these forces and reduce the deformation of the scraper 5 and the fixed ring 62. At the same time, the rigid connection between the fixed plate 8 and the drive shaft 2 also enhances the rigidity of the entire structural system and improves the stability of the grinding assembly under high-speed operation.

[0041] Furthermore, both the scraper 5 and the fixing ring 62 are fitted onto the fixing plate 8, and the scraper 5 can slide up and down relative to the fixing plate 8. The outer wall of the fixing plate 8 provides precise guidance and positioning for the scraper 5 and the fixing ring 62, ensuring that the scraper 5 maintains the correct movement trajectory during its up and down movement. Compared with the traditional design without the fixing plate 8, this structure can prevent the scraper 5 from shifting or tilting during movement, thus improving the accuracy and uniformity of scraping.

[0042] like Figure 1 , Figure 2 and Figure 6 As shown, more preferably, in this embodiment, the elastic element 83 is sleeved on the lower end of the fixed plate 8. The sleeved design simplifies the installation process of the elastic element 83, eliminating the need for additional fasteners or complex positioning operations, thereby reducing assembly difficulty and labor costs.

[0043] like Figure 1 and Figure 2 As shown, preferably, in this embodiment, the fixed disk 8 has a protruding connecting post 82, and the moving grinding wheel 3 has a slot 31, with the connecting post 82 engaging within the slot 31. Thus, the connecting post 82 protruding from the fixed disk 8 and the slot 31 on the moving grinding wheel 3 cooperate with each other, achieving precise positioning of the fixed disk 8 on the moving grinding wheel 3. During installation, simply aligning the connecting post 82 with the slot 31 and inserting it ensures accurate positioning of the fixed disk 8 on the moving grinding wheel 3. This precise positioning prevents the fixed disk 8 from shifting or tilting during installation, ensuring concentricity between the fixed disk 8 and the moving grinding wheel 3, thereby improving the uniformity and stability of the grinding process.

[0044] like Figure 2 and Figure 4 As shown, more preferably, in this embodiment, the fixing ring 62 is provided with a connecting cavity 622, the connecting cavity 622 is recessed and provided with a connecting groove 623, the lower end of the fixing plate 8 is embedded in the connecting groove 623, and one end of the elastic member 61 abuts against the connecting cavity 622. Thus, on the one hand, the fixing ring 62 is provided with a connecting cavity 622 and recessed to form a connecting groove 623, and the lower end of the fixing plate 8 is embedded in the connecting groove 623. This embedded structure makes the fixing ring 62 and the fixing plate 8 form a tight mechanical connection. Compared with the traditional planar contact connection method, the embedded connection can provide a larger contact area and stronger constraint force, effectively preventing the fixing ring 62 and the fixing plate 8 from relative displacement or loosening during equipment operation, thereby improving the structural stability of the entire grinding assembly. On the other hand, the connecting cavity 622 provides a precise installation reference for the elastic element 61, so that one end of the elastic element 61 can accurately abut against the connecting cavity 622, and the other end can stably act on the powder scraper 5. This precise installation method can ensure that the direction of the elastic force generated by the elastic element 61 is accurate, improving the control accuracy of the elastic structure 6 on the powder scraper 5.

[0045] like Figure 3 and Figure 4 As shown, specifically in this embodiment, the lower end of the fixed disk 8 is provided with a flat part 83, which is embedded in the connecting groove 623.

[0046] like Figure 1 and Figure 2 As shown, specifically in this embodiment, a clearance space 81 is formed between the powder scraper 5 and the fixed disk 8, allowing the powder scraper 5 to move up and down relative to the fixed disk 8. Thus, the clearance space 81 between the powder scraper 5 and the fixed disk 8 provides sufficient space for the powder scraper 5 to move up and down relative to the fixed disk 8. The existence of the clearance space 81 prevents the powder scraper 5 from directly rubbing or colliding with the fixed disk 8 during movement, reducing wear between the two. Simultaneously, because the movement of the powder scraper 5 is smoother, the force on the elastic structure 6 is more even, reducing the risk of fatigue damage to the elastic element 61.

[0047] like Figure 1 , Figure 2 and Figure 3 As shown, preferably, in this embodiment, the powder scraper 5 includes a connecting arm 52 and at least two powder scraping arms 51, with at least two powder scraping arms 51 connected to the connecting arm 52 at intervals, and each powder scraping arm 51 maintaining contact with the inner sidewall of the powder collecting ring 7 and the powder outlet side 41 of the stationary grinding wheel 4 respectively. Thus, the scraper 5 consists of at least two scraper arms 51 spaced apart and connected to the connecting arm 52. Compared to a single scraper structure, the simultaneous operation of multiple scraper arms 51 significantly increases the contact area with the inner wall of the collecting ring 7 and the powder outlet side 41 of the stationary grinding wheel 4. This means that a larger area of ​​coffee powder can be cleaned simultaneously in one scraping action, improving scraping efficiency and ensuring that coffee powder can be scraped off from the powder outlet side 41 of the stationary grinding wheel 4 and the inner wall of the collecting ring 7 more promptly and thoroughly. Furthermore, the design of at least two scraper arms 51 spaced apart and connected to the connecting arm 52 allows the scraper 5 to form a certain spatial distribution range. This distribution method can better adapt to the shape and size of the inner wall of the collecting ring 7 and the powder outlet side 41 of the stationary grinding wheel 4, ensuring that every area that needs scraping can be effectively cleaned.

[0048] More preferably, in this embodiment, the guide channel 621 of the connecting arm 52 and the fixed ring 62 are slidably engaged to guide the vertical movement of the scraper 5. This slidable engagement between the connecting arm 52 and the guide channel 621 of the fixed ring 62 makes the entire scraping mechanism simpler and more compact. The guide channel 621 can be designed using the existing structure of the fixed ring 62, eliminating the need for additional complex guide components, thus reducing the manufacturing cost of the equipment. Furthermore, this guiding method makes the installation of the scraper 5 more convenient; the operator only needs to insert the connecting arm 52 into the guide channel 621 of the fixed ring 62 to complete the installation of the scraper 5. During maintenance, it is also easier to inspect, clean, and replace the scraper 5.

[0049] like Figure 1 and Figure 2 As shown, preferably, in this embodiment, the grinding assembly further includes an outer adjusting ring 9 and a decorative ring 10. The decorative ring 10 is sleeved on the grinding cylinder 1, and the outer adjusting ring 9 is threadedly connected to the decorative ring 10. The outer adjusting ring 9 has a push wall 91, which is connected to the stationary grinding wheel 4. When the outer adjusting ring 9 rotates and moves upward, the push wall 91 pushes the stationary grinding wheel 4 upward, causing the stationary grinding wheel 4 to move upward. When the outer adjusting ring 9 rotates and moves downward, the stationary grinding wheel 4 will reset and move downward. Thus, the outer adjusting ring 9 and the decorative ring 10 are connected by a thread. This connection structure has self-locking and adjustability. When the outer adjusting ring 9 is rotated, due to the transmission action of the thread, the outer adjusting ring 9 will move along the axial direction of the decorative ring 10, and its push wall 91 will be connected to the stationary grinding wheel 4, thereby causing the stationary grinding wheel 4 to move up and down. By precisely controlling the rotation angle of the outer adjusting ring 9, the position of the stationary grinding wheel 4 can be finely adjusted to meet the precise control of the gap between the stationary grinding wheel 4 and the moving grinding wheel 3 for different grinding needs.

[0050] Specifically, in this embodiment, the powder collecting ring 7 is connected to the outer adjusting ring 9 and moves up and down with the outer adjusting ring 9.

[0051] It should be noted that in some other embodiments, the powder collecting ring 7 can also be connected to the stationary grinding wheel 4, depending on the actual needs.

[0052] Preferably, in this embodiment, the assembly steps of the grinding assembly's fixing disc, scraper ring, and elastic structure are as follows: First, the fixing disc is installed onto the drive shaft, specifically as follows: Figure 5 As shown; next, the powder scraper is fitted onto the fixed plate, and then the elastic component is fitted onto the fixed plate, specifically as follows. Figure 6 As shown; then install the retaining ring to the lower end of the retaining plate, specifically as follows. Figure 7 As shown; finally, connect the powder collecting ring 7 to the outer adjusting ring 9, thus completing the entire assembly process, as detailed below. Figure 8 As shown.

[0053] In addition, this embodiment also provides a coffee machine including the grinding assembly described above. This coffee machine has all the advantages of the grinding assembly described above, which will not be repeated here.

[0054] In summary, the coffee grinding assembly and coffee machine including the present invention can bring at least the following beneficial technical effects:

[0055] 1) Through the cooperation of the elastic structure 6 and the scraper 5, the scraper 5 can automatically adjust its position according to the movement of the stationary grinding wheel 4, and always keep close to the powder outlet side 41 of the stationary grinding wheel 4, so as to ensure that the scraper 5 scrapes the residual powder on the powder outlet side 41 clean during the grinding process, thus avoiding the impact of residual powder on the coffee quality.

[0056] 2) Improvements were made to the existing coffee grinding components by adding an elastic structure 6 and adjusting the installation method of the powder scraper 5. The structure is simple, easy to implement, and has a low cost.

[0057] 3) The elastic element 61 abuts against the fixed ring 62 and the powder scraper 5 at both ends, which can form a stable elastic force between the drive shaft 2 and the powder scraper 5. This elastic force can ensure that the powder scraper 5 always maintains good contact with the relevant components during normal operation.

[0058] 4) The guide channel 621 set in the fixed ring 62 slides with the powder scraper 5, providing precise guidance for the up and down movement of the powder scraper 5. The existence of the guide channel 621 ensures that the powder scraper 5 always runs along the predetermined trajectory during the movement, avoiding inaccurate powder scraping position caused by shaking, offset, etc., thereby ensuring the uniformity and consistency of the powder scraping effect.

[0059] 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 grinding cylinder (1) is provided with a grinding chamber (11); A drive shaft (2) is disposed inside the grinding chamber (11); The moving grinding wheel (3) is connected to the output end of the drive shaft (2); A stationary grinding wheel (4) is disposed in the grinding chamber (11). A grinding gap is formed between the stationary grinding wheel (4) and the moving grinding wheel (3). The stationary grinding wheel (4) can move up and down relative to the moving grinding wheel (3) to adjust the grinding gap. The powder scraper (5) is connected to the drive shaft (2), and the powder scraper (5) is in contact with the powder outlet side (41) of the stationary grinding wheel (4); An elastic structure (6) is provided between the powder scraper (5) and the drive shaft (2); when the stationary grinding wheel (4) moves upward, the elastic structure (6) is used to elastically drive the powder scraper (5) to move upward so that the powder scraper (5) and the powder outlet side (41) of the stationary grinding wheel (4) remain in contact; when the stationary grinding wheel (4) moves downward, the powder outlet side (41) of the stationary grinding wheel (4) pushes the powder scraper (5) downward so that the elastic structure (6) is compressed.

2. The coffee grinding assembly according to claim 1, characterized in that, The grinding assembly also includes a powder collecting ring (7), which is connected to the lower side of the stationary grinding wheel (4). The powder scraper (5) is in contact with the inner wall of the powder collecting ring (7) and the powder outlet side (41) of the stationary grinding wheel (4). When the stationary grinding wheel (4) moves upward, the elastic structure (6) is used to elastically drive the powder scraper (5) to move upward, so that the powder scraper (5) keeps in contact with the inner wall of the powder collecting ring (7) and the powder outlet side (41) of the stationary grinding wheel (4). When the stationary grinding wheel (4) moves downward, the powder outlet side (41) of the stationary grinding wheel (4) pushes the powder scraper (5) downward and compresses the elastic structure (6).

3. The coffee grinding assembly according to claim 1 or 2, characterized in that, The elastic structure (6) includes an elastic element (61) and a fixing ring (62). The fixing ring (62) is connected to the transmission shaft (2) and located below the elastic element (61). One end of the elastic element (61) abuts against the fixing ring (62), and the other end of the elastic element (61) abuts against the powder scraper (5).

4. The coffee grinding assembly according to claim 3, characterized in that, The fixing ring (62) is provided with a guide channel (621). The powder scraper (5) and the guide channel (621) are slidably engaged. The guide channel (621) provides guidance for the up and down movement of the powder scraper (5).

5. The coffee grinding assembly according to claim 3, characterized in that, The grinding assembly also includes a fixed disk (8), which is connected to the lower end of the drive shaft (2). The powder scraper (5) and the fixing ring (62) are both sleeved on the fixed disk (8), and the powder scraper (5) can slide up and down relative to the fixed disk (8).

6. The coffee grinding assembly according to claim 5, characterized in that, The fixing ring (62) is provided with a connecting cavity (622), the connecting cavity (622) is recessed and provided with a connecting groove (623), the lower end of the fixing plate (8) is embedded in the connecting groove (623), and one end of the elastic member (61) abuts against the connecting cavity (622).

7. The coffee grinding assembly according to claim 5, characterized in that, A clearance space (81) is formed between the powder scraper (5) and the fixed disk (8), the clearance space (81) allowing the powder scraper (5) to move up and down relative to the fixed disk (8).

8. The coffee grinding assembly according to claim 2, characterized in that, The powder scraper (5) includes a connecting arm (52) and at least two powder scraping arms (51). The at least two powder scraping arms (51) are connected to the connecting arm (52) at intervals. Each powder scraping arm (51) is in contact with the inner wall of the powder collecting ring (7) and the powder outlet side (41) of the stationary grinding wheel (4).

9. The coffee grinding assembly according to claim 1, 2, 4, 5, 6, 7, or 8, characterized in that, The grinding assembly also includes an outer adjusting ring (9) and a decorative ring (10). The decorative ring (10) is fitted onto the grinding cylinder (1). The outer adjusting ring (9) is threaded onto the decorative ring (10). The outer adjusting ring (9) has a push wall (91) connected to the stationary grinding wheel (4). When the outer adjusting ring (9) rotates and moves upward, the push wall (91) pushes upward against the stationary grinding wheel (4).

10. A coffee machine, characterized in that, Includes the coffee grinding assembly as described in any one of claims 1-9.

Images