A grinder for use on a coffee maker

Abstract

The utility model relates to coffee machine field, concretely for a kind of grinder for coffee machine on device. It includes bearing seat, start controller, grinder box and grinder subassembly, bearing seat is equipped with grinder cavity, grinder subassembly is placed in cavity, grinder box is loaded on subassembly. Grinder subassembly includes first, second, third driving ring, first driving ring and second driving ring transmission connection are equipped on third driving ring again cutterhead, second driving ring is connected with third driving ring screw thread, grinder box rotates, in turn drive first, second driving ring rotation, second driving ring rotation drives third driving ring and cutterhead to promote. After the above-mentioned innovative technical scheme is adopted, the present application coffee grinder is precisely matched with multilayer driving system through grinder box, can realize the multistage height adjustment function of cutterhead, to accurately control the grinding degree of coffee powder, satisfy the individualized grinding demand of different users, while ensuring grinding performance, give consideration to maintenance convenience and operation safety and multiple advantages such as security.

Description

Technical Field

[0001] This utility model relates to the field of coffee machines, specifically to a coffee grinding device for coffee machines. Background Technology

[0002] Currently, most coffee machine grinding mechanisms on the market suffer from various design flaws and usage problems. Firstly, the design of using elastic components to seal the powder discharge chamber in the powder dispensing and sealing structure has significant drawbacks. While this sealing method, relying on elastic deformation, may be effective initially, with increased use, the elastic material inevitably fatigues and ages, gradually losing its original elastic recovery ability. Once the elastic component fails, it can no longer provide sufficient sealing pressure, ultimately causing the powder discharge chamber to leak, resulting in coffee powder leakage, which is both wasteful and unhygienic.

[0003] Secondly, in terms of cleaning and maintenance, the detachable design of existing grinding components is generally inadequate. Most products use a fixed or semi-fixed structure, making disassembly cumbersome and complex, sometimes requiring specialized tools. This design makes it difficult for users to thoroughly clean residual coffee grounds inside the component, which can easily lead to grounds clogging over time. This not only affects grinding performance but may also breed bacteria. More seriously, once grounds become clogged, due to structural limitations, users are often unable to clean it effectively, leaving the problem to worsen.

[0004] Furthermore, the existing coffee grinders have significant shortcomings in their adjustment mechanisms for controlling grind precision. Current adjustment mechanisms typically employ multi-stage linkages or complex mechanical transmissions, resulting in cumbersome operation and a lack of clear indicators, making it difficult for ordinary users to accurately determine the coarseness of the coffee grounds. This unintuitive operating experience directly impacts users' ability to precisely adjust the grind precision according to personal taste preferences or the needs of different coffee types, ultimately leading to brewed coffee that doesn't achieve the desired flavor.

[0005] More seriously, some coffee grinders exhibit poor mechanical stability during operation. Due to structural design or assembly precision issues, these devices generate significant mechanical vibration and noise when running at high speeds. This continuous vibration not only degrades the user experience but also causes cumulative damage to internal electronic components, plastic parts, and other components, accelerating the aging process of parts and significantly shortening the overall lifespan of the machine. Furthermore, excessive operating noise can disrupt the quiet atmosphere of a home or office environment, impacting user satisfaction. Utility Model Content

[0006] The purpose of this invention is to provide a coffee grinding assembly for a coffee machine that is simple in structure, easy to control the opening and closing of the powder discharge chamber inside the grinding box, and easy to disassemble and clean.

[0007] The above objectives are achieved in the following way.

[0008] A coffee grinding device for a coffee machine includes a support base, a start controller, a grinding hopper, and a grinding assembly. The support base has a grinding chamber, the grinding assembly is disposed within the grinding chamber, and the grinding hopper is mounted on the grinding assembly. The grinding assembly includes a first drive ring, a second drive ring, a third drive ring, a base, a moving burr disc, and a fixed burr disc. The base is disposed within the grinding chamber, and the fixed burr disc is vertically fixed at the center of the base. The second drive ring is sleeved on the fixed burr disc and vertically limited by the base. The first drive ring is disposed outside the second drive ring and vertically limited by the base. The third drive ring is located inside the second drive ring. The first drive ring is connected to the second drive ring via a transmission connection, and the third drive ring is threadedly connected to the second drive ring. The moving blade disc rests on the third drive ring. The bottom of the grinding box is provided with a drive block, and the first drive ring is provided with a drive groove corresponding to the drive block. When the drive block is installed in the drive groove, rotating the grinding box will drive the first drive ring to rotate. The rotation of the first drive ring will drive the second drive ring to rotate, and the rotation of the second drive ring will drive the third drive ring to rotate. The rotation of the third drive ring will simultaneously cause it to rise and fall, and will also cause the moving blade disc to rotate and rise simultaneously.

[0009] The start controller is installed in the support base. The start controller is equipped with a sensing post and a reset spring. A first protruding edge is provided on the outside of the first drive ring. The sensing post abuts against the first protruding edge. When the first drive ring rotates, the first protruding edge pushes the sensing post outward. The sensing post compresses the reset spring and triggers the function of the start controller.

[0010] The objective of this utility model can also be optimized by the following technical measures.

[0011] Preferably, the bottom of the grinding box has a powder discharge cavity with a through hole, and a support rib is provided on the powder discharge cavity. The support rib extends inward into a hollow column, and a connecting rod is provided inside the column. A knob is installed on the top of the column. A circular baffle is provided on the outside of the support rib, and a baffle through hole is opened on the circular baffle. The area of ​​the baffle through hole is smaller than the area of ​​the through hole. A positioning block is provided on the outer wall of the circular baffle. The two ends of the connecting rod are fixedly connected to the circular baffle and the knob, respectively. Rotating the knob drives the circular baffle to rotate, thereby realizing the opening and closing operation of the through hole.

[0012] This design allows for flexible control of coffee grounds flow during the grinding process, tailored to specific needs. When grinding and collecting coffee grounds is required, rotating the knob aligns the through-hole of the circular baffle with the through-hole of the powder discharge chamber, allowing the coffee grounds to flow out smoothly. Conversely, when coffee grounds are not needed, such as when the grinding device is not collecting or when dispensing is paused for other operations, rotating the knob displaces the through-hole of the circular baffle from the through-hole of the powder discharge chamber. This effectively prevents coffee grounds from spilling, avoiding waste and cleaning hassles. Furthermore, the positioning block helps to more accurately position the circular baffle when rotating the knob, ensuring the accuracy and stability of the opening and closing operation.

[0013] Furthermore, a driving ring is fixedly connected to the bottom of the grinding box, a driving block is provided on the outer wall of the driving ring, a fixed post is provided at the bottom of the grinding box, an arc groove is opened on the circular baffle, the fixed post passes through the arc groove and is fixedly connected to the driving ring, and the rotation angle of the circular baffle is equal to the interval angle between the fixed posts.

[0014] This structural design precisely limits the rotation range of the circular baffle. When the drive ring rotates under external power, the drive block rotates accordingly, causing the drive ring to rotate. Since the fixed post is fixedly connected to the drive ring through the arc groove, it moves along the arc groove as the drive ring rotates, thus causing the circular baffle to rotate. Moreover, because the rotation angle of the circular baffle is equal to the interval angle between the fixed posts, the precision of the circular baffle's rotation is ensured. This makes the alignment or misalignment of the baffle through-hole and the powder discharge chamber through-hole more accurate and reliable, further improving the stability and accuracy of the coffee powder outflow control of the grinding device, and effectively avoiding coffee powder outflow control errors caused by inaccurate rotation angles.

[0015] Furthermore, the drive ring is provided with an elastic buckle, and the circular baffle is provided with a corresponding buckle groove. When the circular baffle rotates to the position where the positioning block and the drive block are in an overlapping position, the elastic buckle engages in the buckle groove, and at this time the circular baffle locks the drive ring.

[0016] This design ensures that the circular baffle locks securely in place when it reaches a specific position, preventing unnecessary rotation due to minor external disturbances or slight vibrations during operation. The interlocking of the elastic latch and the locking groove provides a simple yet effective mechanical locking method, enhancing the stability and reliability of the grinder during use. When the position of the circular baffle needs adjustment, simply apply sufficient force to overcome the locking force of the elastic latch, allowing the baffle to continue rotating for the next positioning and locking operation.

[0017] Preferably, the inner wall of the first drive ring is provided with a first drive tooth, the outer wall of the second drive ring is provided with a second drive tooth, the first drive tooth and the second drive tooth are connected in a transmission manner, the inner wall of the second drive ring is provided with a thread, the outer wall of the third drive ring is provided with a thread, and the second drive ring and the third drive ring are connected by a thread.

[0018] Through the transmission connection between the first and second drive teeth and the threaded connection between the second and third drive rings, a stable and reliable linkage between the drive rings is achieved.

[0019] Preferably, the outer wall of the first drive ring is provided with a first protruding edge, and the outer wall of the first drive ring is provided with an inclined surface that transitions to the first protruding edge. When the first drive ring rotates, the sensing column reciprocates on the outer wall of the first drive ring, the inclined surface, and the first protruding edge.

[0020] Furthermore, the base extends upward with a first buckle, which engages with a first protruding edge to vertically limit the first drive ring to the second drive ring. The outer side wall of the second drive ring is provided with a second protruding edge. The base extends upward with a second buckle, which engages with the first protruding edge to vertically limit the second drive ring to the base.

[0021] Preferably, the outer wall of the moving cutter disc is provided with a fixing groove, and the inner surface of the third drive ring is provided with a corresponding fixing buckle. When the fixing buckle is engaged in the fixing groove, it is rotated and locked to realize the locking of the moving cutter disc by the third drive ring.

[0022] Preferably, the outer wall of the third drive ring is provided with local thread features, there are no less than 3 local thread features, the local thread features are equidistantly distributed, and the local thread features correspond to the threads in the second drive ring.

[0023] By adopting the aforementioned innovative technical solution, this coffee grinder, through the precise coordination of a meticulously designed grinding hopper and a multi-layer drive system (including a first drive ring, a second drive ring, and a third drive ring), achieves multi-level height adjustment of the moving blade, thereby accurately controlling the grind level of the coffee powder and meeting the personalized grinding needs of different users. Particularly noteworthy is the unique snap-fit ​​connection structure that fixes the moving blade to the third drive ring. This innovative design ensures stability during the grinding process and greatly simplifies the disassembly process during daily maintenance, allowing users to easily remove the moving blade for thorough cleaning. Furthermore, this invention cleverly integrates the starter controller inside the support base. This user-friendly design not only maintains the clean and aesthetically pleasing appearance of the equipment but, more importantly, effectively prevents potential user misoperation, significantly improving product safety and ease of operation. The overall design fully considers the user's actual experience, ensuring grinding performance while also offering advantages such as ease of maintenance and operational safety. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the present invention.

[0025] Figure 2 This is an exploded view of the parts of this utility model.

[0026] Figure 3 This is an exploded view of the parts of a coffee grinder.

[0027] Figure 4 This is an exploded view of another part of the coffee grinder.

[0028] Figure 5 This is a schematic diagram of the inside of the box.

[0029] Figure 6 This is a schematic diagram of the start controller and the first drive ring.

[0030] Figure 7 This is a schematic diagram of the third drive ring and the moving cutter head.

[0031] Figure 8 This is a schematic diagram of the first driving ring.

[0032] Figure 9 This is a schematic diagram of the second drive ring.

[0033] Figure 10 This is a schematic diagram showing the first drive ring, the second drive ring, and the third drive ring assembled together.

[0034] Figure 11 This is a top view of the first drive ring, the second drive ring, and the third drive ring assembled together.

[0035] Figure 12 for Figure 11 Enlarged view of part A.

[0036] Figure 13 This is a schematic diagram of the coffee machine of this utility model.

[0037] In the diagram: 1. Grinding box; 11. Box body; 111. Fixing column; 112. Powder discharge chamber; 113. Support rib; 114. Column; 12. Knob; 13. Isolation plate; 14. Surrounding plate; 15. Circular baffle; 151. Arc groove; 152. Baffle through hole; 153. First positioning block; 154. Second positioning block; 155. Snap groove; 16. Drive ring; 161. Spring buckle; 162. First drive block; 163. Second drive block; 17. Connecting rod; 2. Base; 21. Starter controller; 22. First buckle; 23. Second buckle; 34. First drive groove; 35. First protruding edge; 33. Inclined surface; 34. First drive tooth; 35. Second drive groove; 41. Second drive tooth; 42. Thread; 51. Third drive ring; 52. Partial thread feature; 52. Fixing buckle; 6. Moving blade disc; 61. Fixing groove; 7. Fixed blade disc. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] Combination Figures 1 to 13 A coffee grinding device for a coffee machine includes a support base, a start controller 21, a grinding cassette 1, and a grinding assembly. The support base has a grinding chamber, the grinding assembly is disposed within the grinding chamber, and the grinding cassette 1 is mounted on the grinding assembly. The bottom of the cassette 11 has a powder discharge chamber 112 with a through hole. A support rib 113 is provided on the powder discharge chamber 112, and a hollow column 114 extends inward from the support rib 113. A connecting rod 17 is provided inside the column 114, and a knob 12 is installed on the top of the column 114. A separator 13 is provided below the knob 12 to prevent coffee from escaping. Entering the hollow column 114, a circular baffle 15 is provided on the outer side of the support rib 113. A baffle through hole 152 is opened on the circular baffle 15. The area of ​​the baffle through hole 152 is smaller than the area of ​​the through hole. A first positioning block 153 and a second positioning block 154 are provided on the outer wall of the circular baffle 15. The two ends of the connecting rod 17 are fixedly connected to the circular baffle 15 and the knob 12 respectively. Rotating the knob 12 drives the circular baffle 15 to rotate, realizing the opening and closing operation of the through hole. In this embodiment, the size and shape of the first positioning block 153 and the second positioning block 154 are different.

[0040] Combination Figure 3 and Figure 4The grinding box 1 includes a surrounding plate 14, a circular baffle 15 with a driving ring 16 fixedly connected to its bottom, a first driving block 162 and a second driving block 163 on the outer side wall of the driving ring 16, a fixing post 111 at the bottom of the grinding box 1, and an arc groove 151 on the circular baffle 15. The fixing post 111 passes through the surrounding plate 14 and the arc groove 151 and is fixedly connected to the driving ring 16. The rotation angle of the circular baffle 15 is equal to the interval angle between the fixing post 111 and the two ends of the arc groove 151. The driving ring 16 is provided with a spring buckle 161, and the circular baffle 15 is provided with a corresponding buckle groove 155. When the circular baffle 15 rotates to the position where the first positioning block 153 and the first driving block 162, and the second positioning block 154 and the second driving block 163 are in an overlapping position, the spring buckle 161 engages in the buckle groove 155, and the circular baffle 15 locks the driving ring 16.

[0041] Combination Figure 2 as well as Figures 6 to 12 The grinding assembly includes a first drive ring 3, a second drive ring 4, a third drive ring 5, a base 2, a moving blade disc 6, and a fixed blade disc 7. The base 2 is disposed inside the grinding chamber, and the fixed blade disc 7 is vertically fixed at the center of the base 2. The second drive ring 4 is sleeved on the fixed blade disc 7 and is vertically limited by the base 2. The first drive ring 3 is disposed outside the second drive ring 4 and is vertically limited by the base 2. The third drive ring 5 is disposed inside the second drive ring 4.

[0042] Combination Figure 11 and Figure 12 The inner wall of the first drive ring 3 is provided with a first drive tooth 34, and the outer wall of the second drive ring 4 is provided with a second drive tooth 41. The first drive tooth 34 and the second drive tooth 41 are connected in a transmission manner. The inner wall of the second drive ring 4 is provided with a thread 42, and the outer wall of the third drive ring 5 is provided with a partial thread feature 51. The second drive ring 4 and the third drive ring 5 are connected by the thread 42 and the partial thread feature 51.

[0043] Combination Figure 7 The moving blade disc 6 rests on the third drive ring 5. The first drive ring 3 has a first drive groove 31 and a second drive groove 35 corresponding to the first drive block 162 and the second drive block 163. When the first drive block 162 and the second drive block 163 are sequentially installed into the first drive groove 31 and the second drive groove 35, rotating the grinding box 1 drives the first drive ring 3 to rotate. The rotation of the first drive ring 3 drives the second drive ring 4 to rotate. The rotation of the second drive ring 4 drives the third drive ring 5 to rotate. The rotation of the third drive ring 5 causes it to rise and fall simultaneously, which in turn causes the moving blade disc 6 to rotate and rise and fall simultaneously. The first drive block 162 and the second drive block 163 are different in size and width. The first drive groove 31 and the second drive groove 35 correspond to the shapes of the first drive block 162 and the second drive block 163, respectively.

[0044] When the first positioning block 153 overlaps with the first driving block 162, and the second positioning block 154 overlaps with the second driving block 163, the grinding device is in its initial state. When the grinding box 1 is rotated, the grinding box 1 drives the first driving ring 3 and the second driving ring 4 to rotate. The rotation of the second driving ring 4 drives the third driving ring 5 and the moving blade 6 to rotate and rise. The gap between the moving blade 6 and the fixed blade 7 changes, causing the grind of the coffee beans to change.

[0045] Combination Figure 2 and Figure 6 The start controller 21 is installed in the support base. The start controller 21 is equipped with a sensing post and a reset spring. The outer side of the first drive ring 3 is provided with a first protruding edge 32. The outer side wall of the first drive ring 3 is provided with an inclined surface 33 that transitions to the first protruding edge 32. The sensing post abuts against the first protruding edge 32. When the first drive ring 3 rotates, the sensing post moves back and forth on the outer side wall of the first drive ring 3, the inclined surface 33, and the first protruding edge 32. When the sensing post enters the inclined surface 33 from the outer side wall of the first drive ring 3, the first protruding edge 32 pushes the sensing post outward. The sensing post compresses the reset spring and triggers the function of the start controller 21.

[0046] Combination Figure 2 The base 2 extends upward with a first buckle 22, which engages with a first protruding edge 32, vertically limiting the first driving ring 3 on the second driving ring 4. The first driving ring 3 can rotate under the vertical limiting action of the first buckle 22. The outer wall of the second driving ring 4 is provided with a second protruding edge. The base 2 extends upward with a second buckle 23, which engages with the second protruding edge, vertically limiting the second driving ring 4 on the base 2. The second driving ring 4 can rotate under the vertical limiting action of the second buckle 23. The number of second buckles 23 is not less than 3, and the second buckles 23 are evenly distributed on the base 2.

[0047] The outer wall of the moving cutter head 6 is provided with a fixing groove 61, and the inner surface of the third drive ring 5 is provided with a corresponding fixing buckle 52. When the fixing buckle 52 is engaged in the fixing groove 61, it is rotated and locked to achieve the locking of the moving cutter head 6 by the third drive ring 5.

[0048] Combination Figure 7 There are no fewer than three local thread features 51 on the outer wall of the third drive ring 5. The local thread features 51 are equidistantly distributed and correspond to the thread 42 in the second drive ring 4.

[0049] The above are preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A coffee grinding device for a coffee machine, comprising a support base, a start controller, a grinding hopper, and a grinding assembly, wherein the support base has a grinding chamber, the grinding assembly is disposed within the grinding chamber, and the grinding hopper is mounted on the grinding assembly, characterized in that: The grinding assembly includes a first drive ring, a second drive ring, a third drive ring, a base, a moving blade disc, and a fixed blade disc. The base is disposed inside the grinding chamber, and the fixed blade disc is vertically fixed at the center of the base. The second drive ring is sleeved on the fixed blade disc and vertically limited by the base. The first drive ring is disposed outside the second drive ring and vertically limited by the base. The third drive ring is disposed inside the second drive ring. The first drive ring and the second drive ring are connected by transmission, and the third drive ring and the second drive ring are connected by threads. The moving blade disc rests on the third drive ring. The bottom of the grinding box is provided with a drive block, and the first drive ring is provided with a drive groove corresponding to the drive block. When the drive block is installed in the drive groove, rotating the grinding box drives the first drive ring to rotate. The rotation of the first drive ring drives the second drive ring to rotate, and the rotation of the second drive ring drives the third drive ring to rotate. The rotation of the third drive ring causes it to rise and fall simultaneously, which in turn causes the moving blade disc to rotate and rise simultaneously. The start controller is installed in the support base. The start controller is equipped with a sensing post and a reset spring. A first protruding edge is provided on the outside of the first drive ring. The sensing post abuts against the first protruding edge. When the first drive ring rotates, the first protruding edge pushes the sensing post outward. The sensing post compresses the reset spring and triggers the function of the start controller.

2. The coffee grinding device for a coffee machine according to claim 1, characterized in that: The bottom of the grinding box has a powder discharge chamber with a through hole. A support rib is provided on the powder discharge chamber, and a hollow column extends inward from the support rib. A connecting rod is provided inside the column, and a knob is installed on the top of the column. A circular baffle is provided on the outside of the support rib, and a through hole is opened on the circular baffle. The area of ​​the through hole is smaller than the area of ​​the through hole. A positioning block is provided on the outer wall of the circular baffle. The two ends of the connecting rod are fixedly connected to the circular baffle and the knob, respectively. Rotating the knob drives the circular baffle to rotate, realizing the opening and closing operation of the through hole.

3. The coffee grinding device for a coffee machine according to claim 2, characterized in that: A drive ring is fixedly connected to the bottom of the grinding box. A drive block is provided on the outer wall of the drive ring. A fixed post is provided at the bottom of the grinding box. An arc groove is opened on the circular baffle. The fixed post passes through the arc groove and is fixedly connected to the drive ring. The rotation angle of the circular baffle is equal to the interval angle between the fixed posts.

4. The coffee grinding device for a coffee machine according to claim 3, characterized in that: The drive ring is provided with an elastic buckle, and the circular baffle is provided with a corresponding buckle groove. When the circular baffle rotates to the position where the positioning block and the drive block are in an overlapping position, the elastic buckle engages in the buckle groove, and the circular baffle locks the drive ring.

5. The coffee grinding device for a coffee machine according to claim 1, characterized in that: The inner wall of the first drive ring is provided with a first drive tooth, the outer wall of the second drive ring is provided with a second drive tooth, the first drive tooth and the second drive tooth are connected in a transmission manner, the inner wall of the second drive ring is provided with a thread, the outer wall of the third drive ring is provided with a thread, and the second drive ring and the third drive ring are connected by a thread.

6. The coffee grinding device for a coffee machine according to claim 1, characterized in that: The outer wall of the first drive ring is provided with a first protruding edge, and the outer wall of the first drive ring is provided with an inclined surface that transitions to the first protruding edge. When the first drive ring rotates, the sensing column reciprocates on the outer wall of the first drive ring, the inclined surface, and the first protruding edge.

7. The coffee grinding device for a coffee machine according to claim 6, characterized in that: The base extends upward with a first buckle, which engages with a first protruding edge to vertically limit the first drive ring onto the second drive ring. The outer side wall of the second drive ring is provided with a second protruding edge. The base extends upward with a second buckle, which engages with the first protruding edge to vertically limit the second drive ring onto the base.

8. The coffee grinding device for a coffee machine according to claim 1, characterized in that: The outer wall of the moving cutter head is provided with a fixing groove, and the inner surface of the third drive ring is provided with a corresponding fixing buckle. When the fixing buckle is engaged in the fixing groove, it is rotated to lock, thereby locking the moving cutter head by the third drive ring.

9. The coffee grinding device for a coffee machine according to claim 1, characterized in that: The outer wall of the third drive ring is provided with local thread features, there are no less than 3 local thread features, the local thread features are equidistantly distributed, and the local thread features correspond to the threads in the second drive ring.

10. A coffee machine, characterized in that: The coffee machine includes a grinding device for use on a coffee machine as described in any one of claims 1 to 9.

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