Bean grinding system and coffee machine
By improving the coaxiality and sealing of the bean grinding knife and the cutter plate in the bean grinding system, combined with the design of the powder sweeping board and wool loop, the problems of grinding uniformity and extraction pressure stability are solved, and more efficient Coffee powder making.
Patent Information
- Application Number
- CN202421052185.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-05-14
AI Technical Summary
When grinding continuously, the existing bean grinders have poor coaxial accuracy of the knife ring seat and the cutter wheel gear, resulting in poor grinding uniformity, and the extraction pressure cannot be effectively suppressed, and the pressure attenuation amplitude is relatively large when the cup is continuously released.
By designing the center coaxiality of the bean grinding knife and the cutter plate in the bean grinding system, the side perimeter gap is smaller, and the sealing ring and tool holder adjustment ring structure is adopted to ensure uniform grinding of the coffee powder and stable extraction pressure, including grinding The fitting design of the bean cavity and the knife plate, the matching of the sealing ring, the matte sweeping board and the wool ring, and the buckle slot and buckle part structure of the tool holder adjustment ring.
It improves the uniformity and stability of the grinding powder, ensures the quality of continuous coffee making, prevents the coffee powder from entering the gap, stabilizes the extraction pressure, and improves the user experience.
Smart Images
Figure CN222194730U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of coffee machines, and in particular relates to a bean grinding system and a coffee machine. Background Art
[0002] The existing bean grinders have poor grinding uniformity during continuous grinding due to the low coaxial accuracy between the knife ring seat and the knife disc gear. For example, the Chinese patent with authorization announcement number CN21766063U discloses a bean grinding assembly and a coffee machine, which results in poor suppression of the extraction pressure and a large pressure attenuation when continuously dispensing cups. Utility Model Content
[0003] In view of the above technical problems existing in the prior art, the utility model provides a bean grinding system and a coffee machine. The bean grinding system ensures that the center coaxiality of the bean grinding knife and the knife disc is more accurate, the side circumference gap is smaller, the powder output uniformity is improved, and the extraction pressure is stably controlled.
[0004] The technical solution adopted in the embodiment of the utility model is:
[0005] A bean grinding system, comprising a bean grinding box, wherein the bean grinding box has a bean grinding chamber and a knife seat adjustment ring located outside the cavity opening of the bean grinding chamber, and the bean grinding system further comprises:
[0006] A bean grinding component, comprising a rotating shaft extending into the bean grinding chamber and a first bean grinding knife arranged on the rotating shaft;
[0007] a knife disc fixed in the bean grinding chamber, the knife disc being cylindrical and coaxial with the axis of the rotating shaft, the outer peripheral wall of the knife disc being in contact with the cavity wall of the bean grinding chamber, and the inner peripheral wall of the knife disc being provided with a second bean grinding knife opposite to the first bean grinding knife;
[0008] A sealing ring, located between the outer peripheral wall of the knife disc and the cavity wall of the bean grinding cavity;
[0009] The knife ring seat is connected to the top of the outer peripheral wall of the knife disc, and the knife ring seat is also connected to the knife seat adjustment ring to fix the knife disc in the bean grinding chamber.
[0010] Furthermore, the bean grinding system further comprises:
[0011] a powder sweeping plate, which is sleeved on the rotating shaft and is located on the side of the first bean grinding knife facing the bottom of the bean grinding chamber, the bottom of the outer peripheral wall of the powder sweeping plate extends toward the bottom of the bean grinding chamber to form a skirt portion, and the skirt portion and the bottom surface of the powder sweeping plate form a receiving chamber;
[0012] The wool loop is embedded in the accommodating cavity and fits with the side wall of the accommodating cavity. The wool loop abuts against the bottom of the grinding cavity.
[0013] The skirt portion on the powder sweeping plate cooperates with the wool loop, so that the coffee powder in the bean grinding chamber can be ensured to enter the accommodating chamber and the gap between the rotating shaft and the bean grinding box.
[0014] Furthermore, a knife ring seal is provided between the inner peripheral wall of the wool loop and the outer peripheral wall of the rotating shaft, and the knife ring seal can further improve the sealing performance of the wool loop.
[0015] Furthermore, the bottom of the grinding chamber has a through passage coaxial with the rotating shaft and a sleeve located in the through passage, the rotating shaft is inserted into the sleeve, and a first gasket is provided between the bottom surface of the powder sweeping plate and the end surface of the sleeve. The first gasket can ensure that the first bean grinding knife will not move downward, and the gap between the blade discs can be ensured to be uniform, so that the uniformity and coarseness of the powder can be controlled without poor attenuation.
[0016] Furthermore, at least three buckle parts are arranged at intervals on the inner wall of the knife seat adjustment ring along its circumference, and at least three buckle grooves corresponding to the buckle parts are arranged on the outer wall of the knife ring seat along its circumference, and the knife ring seat can be inserted into the knife seat adjustment ring and rotate along the knife seat adjustment ring so that the buckle parts can be snapped into the corresponding buckle grooves. This structure not only facilitates the installation and disassembly of the knife ring seat and the knife disc, but also through the cooperation of at least three buckle parts of the knife seat adjustment ring and the buckle grooves of the knife ring seat, the knife ring seat can work for a long time without displacement, thereby improving performance and improving the uniformity of grinding.
[0017] Furthermore, the knife ring seat is an injection-molded plastic part, which is convenient to process.
[0018] Furthermore, the knife ring seat is clamped with the knife disc.
[0019] Furthermore, the bean grinding box also has a driving motor and a gear transmission mechanism connecting the motor shaft of the driving motor and the rotating shaft.
[0020] A coffee machine comprises a bean grinding system according to any one of the above embodiments.
[0021] Compared with the prior art, the beneficial effects of the embodiments of the utility model are:
[0022] Compared with the traditional blade disc structure, the bean grinding system of the utility model fits the outer peripheral wall of the blade disc with the cavity wall of the bean grinding chamber, which can ensure that the center coaxiality of the bean grinding knife and the blade disc is more accurate, and the side circumference gap is smaller. During the grinding process, the coffee beans can be evenly distributed between the two bean grinding knives, which improves the uniformity of powder output and stabilizes the control of extraction pressure. At the same time, a sealing ring is added between the blade disc and the bean grinding chamber to prevent the coffee powder from being brought into the gap between the blade disc and the bean grinding chamber when the bean grinding system is in operation, stabilize the extraction pressure, and improve the quality of the user's continuous coffee making.
[0023] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the disclosed embodiments. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.
[0025] Figure 1 This is a cross-sectional view of the bean grinding system according to an embodiment of the utility model;
[0026] Figure 2 for Figure 1 A magnified view of part A;
[0027] Figure 3 for Figure 1 A magnified view of part B;
[0028] Figure 4 A top view of a knife seat adjustment ring according to an embodiment of the utility model;
[0029] Figure 5 This is a schematic diagram of the three-dimensional structure of the knife seat adjustment ring and the knife disc after assembly according to the embodiment of the utility model;
[0030] Figure 6 This is a cross-sectional view of the assembled knife seat adjustment ring and knife disc according to an embodiment of the utility model.
[0031] In the figure: 1. bean grinding box; 11. upper cover; 12. gear box; 13. bean grinding chamber; 14. knife seat adjustment ring; 140. protrusion; 15. bean grinding bracket; 16. rotating wheel; 17. driving motor; 18. gear transmission mechanism; 19. powder outlet channel; 2. bean grinding parts; 21. rotating shaft; 22. first bean grinding knife; 23. powder sweeping plate; 24. wool loop; 25. third gasket; 26. fourth gasket; 27. sleeve; 3. sealing ring; 4. knife disc; 5. knife ring seat; 6. first gasket; 7. second gasket; 8. tightening nut. DETAILED DESCRIPTION
[0032] In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present utility model, the present utility model is described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0033] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0034] The present utility model provides a coffee bean grinding system. Figure 1 , Figure 5 and Figure 6 As shown, the bean grinding system includes a bean grinding box 1, which has a bean grinding chamber 13 and a knife seat adjustment ring 14 located outside the cavity of the bean grinding chamber 13. The top of the bean grinding chamber 13 is open. The bean grinding chamber 13 is used to carry coffee beans to be ground and grind the coffee beans into coffee powder through the internal bean grinding component 2. The bean grinding box 1 is also provided with a powder outlet channel 19 connected to the bean grinding chamber 13.
[0035] The bean grinding system further includes a bean grinding component 2, a knife disc 4, a sealing ring 3 and a knife ring seat 5.
[0036] The bean grinding component 2 includes a rotating shaft 21 extending into the bean grinding chamber 13 and a first bean grinding knife 22 disposed on the rotating shaft 21 and having a conical shape. The rotating shaft 21 is vertically disposed in the bean grinding chamber 13, and the outer diameter of the first bean grinding knife 22 gradually decreases from top to bottom.
[0037] The blade disc 4 is fixed in the bean grinding chamber 13. The blade disc 4 is cylindrical and coaxial with the axis of the rotating shaft 21. The outer peripheral wall of the blade disc 4 is in contact with the cavity wall of the bean grinding chamber 13. The inner peripheral wall of the blade disc 4 is provided with a second bean grinding knife (not shown in the figure) opposite to the first bean grinding knife 22. A grinding gap for grinding coffee beans is formed between the first bean grinding knife 22 and the second bean grinding knife.
[0038] The coffee beans entering the bean grinding chamber 13 will accumulate in the gap between the first bean grinding knife 22 and the second bean grinding knife. At this time, the rotating shaft 21 is controlled to rotate, and the first bean grinding knife 22 rotates relative to the second bean grinding knife to grind the coffee beans into coffee powder, and the ground coffee powder is discharged through the powder outlet channel 19.
[0039] The sealing ring 3 is located between the outer peripheral wall of the blade disc 4 and the cavity wall of the bean grinding chamber 13 to prevent the ground coffee powder from entering therebetween.
[0040] The knife ring seat 5 is connected to the top of the outer peripheral wall of the knife disc 4 , and the knife ring seat 5 is also connected to the knife seat adjustment ring 14 to fix the knife disc 4 in the bean grinding chamber 13 .
[0041] Compared with the traditional blade disc 4 structure, the bean grinding system of the present invention fits the outer peripheral wall of the blade disc 4 with the cavity wall of the bean grinding cavity 13, which can ensure that the center coaxiality of the bean grinding knife and the blade disc 4 is more accurate, and the side circumferential gap is smaller. During the grinding process, the coffee beans can be evenly distributed between the two bean grinding knives, which improves the uniformity of the powder output and stabilizes the control of the extraction pressure.
[0042] At the same time, a sealing ring 3 is added between the blade disc 4 and the grinding chamber 13 to prevent coffee powder from being brought into the gap between the blade disc 4 and the grinding chamber 13 when the grinding system is in operation, thereby stabilizing the extraction pressure and improving the quality of the user's continuous coffee making.
[0043] In some embodiments, the bean grinding component 2 further includes a powder sweeping plate 23 and a wool loop 24. The powder sweeping plate 23 is fixed on the rotating shaft 21 and can rotate synchronously with the rotating shaft 21, and the wool loop 24 is fixed on the powder sweeping plate 23.
[0044] like Figure 1 As shown, the powder sweeping plate 23 is sleeved on the rotating shaft 21 and is located on the side of the first bean grinding knife 22 facing the bottom of the grinding chamber 13. After the coffee beans are ground into coffee powder, the coffee powder accumulated at the bottom of the chamber can be swept into the powder outlet channel 19 by the rotating powder sweeping plate 23.
[0045] Furthermore, the bottom of the outer peripheral wall of the powder sweeping plate 23 of this embodiment extends toward the direction close to the bottom of the grinding chamber 13 to form a skirt portion, and the skirt portion and the bottom surface of the powder sweeping plate 23 surround a receiving chamber. The wool loop 24 is embedded in the receiving chamber and achieves an interference fit with the side wall of the receiving chamber, that is, the outer peripheral wall of the wool loop 24 is tightly fitted with the side wall of the receiving chamber. The wool loop 24 is against the bottom of the grinding chamber 13. The wool loop 24 can prevent the ground coffee powder from entering the gap between the powder sweeping plate 23 and the rotating shaft 21.
[0046] In some embodiments, a knife ring seal 3 (not shown in the figure) can be set between the inner wall of the wool loop 24 and the outer wall of the rotating shaft 21. The knife ring seal 3 can be used to seal the wool loop 24 and the rotating shaft 21, which can further ensure the sealing between the powder sweeping plate 23 and the rotating shaft 21.
[0047] In some embodiments, the bottom of the grinding chamber 13 has a through passage coaxial with the rotation shaft 21 and a sleeve 27 located in the through passage.
[0048] The rotating shaft 21 is inserted into the sleeve 27 . The top end of the sleeve 27 is bent outward to form an annular support platform that abuts against the bottom of the grinding chamber 13 . The end surface of the annular support platform is the top end surface of the sleeve 27 .
[0049] like Figure 2 As shown, a first gasket 6 is provided between the bottom surface of the powder sweeping plate 23 and the top end surface of the sleeve 27 of this embodiment, and the first gasket 6 can ensure that the first bean grinding knife 22 does not move downward, and the gap between the blade disc 4 can be ensured to be uniform, so that the uniformity and coarseness of the powder can be controlled without poor attenuation.
[0050] Furthermore, if Figure 1 As shown, a tightening nut 8 connected to the rotating shaft 21 by a thread is provided at the top end of the rotating shaft 21 of this embodiment, and a second gasket 7 is provided between the tightening nut 8 and the first bean grinding knife 22. The first gasket 6 and the second gasket 7 cooperate with each other to prevent the first bean grinding knife 22 from moving up and down.
[0051] like Figure 1 and Figure 3 As shown, in some embodiments, a support platform for supporting the bottom end surface of the sleeve 27 and the stepped surface of the rotating shaft 21 is provided in the grinder box 1. A third gasket 25 is provided between the support platform for supporting the bottom end surface of the sleeve 27 and the sleeve 27, and a fourth gasket 26 is provided between the support platform for supporting the stepped surface of the rotating shaft 21 and the rotating shaft 21. The third gasket 25 cooperates with the first gasket 6 to ensure that the sleeve 27 does not move up and down, and the fourth gasket 26 ensures that the rotating shaft 21 does not move downward.
[0052] like Figure 4As shown, in some embodiments, at least three buckle portions 140 are spaced apart along the circumference of the inner wall of the knife seat adjustment ring 14. The buckle portions 140 can be understood as structures such as bumps protruding from the inner wall.
[0053] The outer peripheral wall of the knife ring seat 5 is provided with at least three buckling grooves corresponding to the buckling portions 140 along its circumference.
[0054] The knife ring seat 5 of this embodiment can be extended into the knife seat adjustment ring 14 and rotate along the knife seat adjustment ring 14, so that each buckle portion 140 can be screwed into the corresponding buckle groove, thereby realizing the connection between the knife ring seat 5 and the knife seat adjustment ring 14, and then fixing the knife disc 4 in the bean grinding chamber 13.
[0055] This structure not only facilitates the installation and disassembly of the knife ring seat 5 and the knife disc 4, but also ensures that the knife ring seat 5 will not shift even if it works for a long time through the cooperation of at least three buckle parts 140 of the knife seat adjustment ring 14 and the buckle grooves of the knife ring seat 5, thereby improving the stability in the working state and the uniformity of the grinding.
[0056] In some embodiments, the knife ring seat 5 is snap-fitted with the top peripheral wall of the knife disc 4. Preferably, the knife ring seat 5 is an injection-molded plastic part, and the knife disc 4 is made of metal materials, such as gold, silver, copper, iron, tin and other metal materials.
[0057] In this embodiment, the bean grinding box 1 further comprises a driving motor 17 and a gear transmission mechanism 18 connecting the motor shaft of the driving motor 17 and the rotating shaft 21 .
[0058] Specifically, a motor gear is provided on the motor shaft, and a rotating shaft gear is provided on the rotating shaft 21 . The motor gear and the rotating shaft gear are meshed and driven via an intermediate gear.
[0059] like Figure 1 As shown, in some embodiments, the bean grinding box 1 is provided with a gear box 12 and an upper cover 11 buckled on the gear box 12. The bean grinding chamber 13 is arranged on the upper cover 11, the driving motor 17 is fixed on the gear box 12, and the gear transmission mechanism 18 connecting the driving motor 17 and the rotating shaft 21 is arranged on the gear box 12.
[0060] Furthermore, a rotating wheel 16 and a grinding bean bracket 15 are further provided on the grinding bean box 1 of the grinding system. The grinding bean bracket 15 is rotatably arranged on the upper cover 11 of the grinding bean box 1. The grinding bean bracket 15 wraps the knife seat adjustment ring 14. The knife seat adjustment ring 14 is sleeved outside the cavity opening of the grinding bean chamber 13. The outer peripheral wall of the knife seat adjustment ring 14 is provided with an external thread, and the inner peripheral wall of the grinding bean bracket 15 is provided with an internal thread. The grinding bean bracket 15 is connected to the knife seat adjustment ring 14 through threads. When the grinding bean bracket 15 rotates relatively, it can drive the knife seat adjustment ring 14 to move up and down, thereby realizing the adjustment of the upper and lower positions of the knife disc 4.
[0061] In addition, this embodiment further provides a coffee machine, which includes a bean grinding system as described in any of the above embodiments.
[0062] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.
Claims
1. A bean grinding system, comprising a bean grinding box (1), wherein the bean grinding box (1) has a bean grinding chamber (13) and a knife seat adjustment ring (14) located outside the cavity opening of the bean grinding chamber (13), characterized in that: The bean grinding system also includes: A bean grinding component (2), comprising a rotating shaft (21) extending into the bean grinding chamber (13) and a first bean grinding knife (22) arranged on the rotating shaft (21); a knife disc (4) fixed in the bean grinding chamber (13); the knife disc (4) is cylindrical and coaxial with the axis of the rotating shaft (21); the outer peripheral wall of the knife disc (4) is in contact with the cavity wall of the bean grinding chamber (13); and the inner peripheral wall of the knife disc (4) is provided with a second bean grinding knife opposite to the first bean grinding knife (22); A sealing ring (3) is located between the outer peripheral wall of the knife disc (4) and the cavity wall of the bean grinding cavity (13); The knife ring seat (5) is connected to the top of the outer peripheral wall of the knife disc (4), and the knife ring seat (5) is also connected to the knife seat adjustment ring (14) to fix the knife disc (4) in the bean grinding chamber (13).
2. A coffee bean grinding system as claimed in claim 1, characterized in that: The bean grinding component (2) further comprises: a powder sweeping plate (23) which is sleeved on the rotating shaft (21) and is located on a side of the first bean grinding knife (22) facing the bottom of the bean grinding chamber (13); the bottom of the outer peripheral wall of the powder sweeping plate (23) extends toward the bottom of the bean grinding chamber (13) to form a skirt portion; the skirt portion and the bottom surface of the powder sweeping plate (23) form a receiving chamber; The wool loop (24) is embedded in the accommodating cavity and fits against the side wall of the accommodating cavity. The wool loop (24) abuts against the bottom of the bean grinding cavity (13).
3. A coffee bean grinding system as claimed in claim 2, characterized in that: A knife ring seal is provided between the inner peripheral wall of the wool loop (24) and the outer peripheral wall of the rotating shaft (21).
4. A coffee bean grinding system as claimed in claim 2, characterized in that: The bottom of the grinding chamber (13) has a through passage coaxial with the rotating shaft (21) and a sleeve (27) located in the through passage, the rotating shaft (21) is inserted into the sleeve (27), and a first gasket (6) is provided between the bottom surface of the powder sweeping plate (23) and the end surface of the sleeve (27).
5. The bean grinding system according to claim 1, characterized in that: At least three buckling portions (140) are arranged at intervals on the inner wall of the knife seat adjustment ring (14) along its circumference, and at least three buckling grooves corresponding to the buckling portions (140) are arranged on the outer wall of the knife ring seat (5) along its circumference. The knife ring seat (5) can extend into the knife seat adjustment ring (14) and rotate along the knife seat adjustment ring (14) so that the buckling portion (140) can be snapped into the corresponding buckling groove.
6. The bean grinding system according to claim 1, characterized in that: The knife ring seat (5) is an injection-molded plastic part.
7. The bean grinding system according to claim 1, characterized in that: The knife ring seat (5) is clamped with the knife disc (4).
8. The bean grinding system according to claim 1, characterized in that: The bean grinding box (1) also has a driving motor (17) and a gear transmission mechanism (18) connecting the motor shaft of the driving motor (17) and the rotating shaft (21).
9. A coffee machine, characterized in that: A bean grinding system comprising any one of claims 1-8.